[Event "SapporoSummer2022"]
[Site "?"]
[Date "2022.07.17"]
[Round "1.1"]
[White "Yoshii, Yukihiko"]
[Black "Nakamura, Mitsuru"]
[Result "1-0"]
[ECO "E97"]
[WhiteElo "1686"]
[BlackElo "1355"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "111"]
[SourceVersionDate "2022.07.18"]

{[%mdl 8256] E97: King's Indian: Classical Main Line (6...e5 7 0-0 Nc6): 8 Be3
and 8 d5 Ne7, not 9 Ne1} 1. c4 Nf6 2. Nc3 g6 3. d4 Bg7 4. e4 d6 5. Nf3 O-O 6.
Be2 e5 7. O-O Nc6 8. d5 Ne7 9. h3 Nh5 (9... Ne8 10. Bg5 f6 11. Bh4 Kh8 12. Qd2
Ng8 13. b4 Qe7 14. Rab1 h5 15. Bg3 Bh6 16. Qd3 Ng7 17. Bh4 g5 18. Bg3 f5 19. c5
f4 20. Bh2 g4 21. hxg4 hxg4 22. Nd2 Nh5 23. cxd6 cxd6 24. g3 {WoDra (2534)
-McShane (2381) playchess.com INT 2006 0-1 (35)}) (9... a5 10. Be3 Ne8 11. Qd2
f5 12. exf5 gxf5 13. Bh6 f4 14. Bxg7 Nxg7 15. Bd3 Nef5 16. Rfe1 Nh5 17. a3 Bd7
18. b4 Qe7 19. Nb5 Be8 20. Bxf5 Rxf5 21. bxa5 Qg7 22. Kh1 Nf6 23. Rg1 Rh5 24.
Kh2 {Da Silva,H (2219)-Violla Cunha,M (2322) Rio de Janeiro 2015 0-1 (31)}) 10.
Re1 f5 $146 (10... h6 11. b4 Nf4 12. Bxf4 exf4 13. Rc1 a5 14. Qb3 axb4 15. Qxb4
c6 16. Bd1 g5 17. a4 c5 18. Qb1 Ng6 19. Nd2 Re8 20. Nb5 Ne5 21. Nf1 h5 22. Bxh5
Rxa4 23. Nd2 Rb4 24. Qc2 Rb2 25. Qxb2 {Guzenko,A (2235)-Churkin,V (2313) St
Petersburg 2011 0-1 (76)}) (10... Bd7 11. b4 a5 12. Ba3 axb4 13. Bxb4 b6 14. a4
Qc8 15. a5 bxa5 16. Rxa5 Qb7 17. Nb5 f5 {1/2-1/2 (17) Mladenov,P (2259)-Petrov,
M (2425) Plovdiv 2006}) 11. exf5 gxf5 ({Less advisable is} 11... Nxf5 12. Bg5
Bf6 13. Bxf6 Nxf6 14. Bf1 $14) (11... Bxf5 $2 12. g4 $18) {[%tqu "En","","","",
"f3e5","",10]} 12. Nxe5 $1 {Discovered attack: f3, Be2xh5} dxe5 (12... dxe5 13.
Bxh5 {Discovered attack}) (12... Bxe5 13. Bxh5 {Discovered attack}) 13. Bxh5 f4
14. Bg4 (14. b3 e4 15. Bb2 Nf5 16. Rxe4 Nh4 $18) 14... a6 (14... Nf5 15. Bf3
$16) 15. Ne4 $18 Nf5 16. b3 b6 (16... Nd4 17. Bb2 $18) 17. Bb2 (17. Ba3 Rf7 $18
) 17... Qe7 18. Qd2 (18. a4 Rd8 $18) 18... Bb7 (18... Nd4 19. f3 $18) 19. Rad1
Rad8 20. Qe2 Nd6 (20... Rf7 21. Nd2 $18) 21. Be6+ Kh8 22. Nxd6 (22. Nd2 $142
$18 {might be the shorter path}) 22... cxd6 $16 23. Qg4 Rf6 24. Qe2 Rdf8 (24...
Rff8 25. Bg4 Bf6 $16) 25. f3 Rg6 26. Qf2 Qc7 27. Ba3 Bc8 28. Bxc8 Qxc8 29. Kh1
Qc7 30. Re4 Rg8 31. Rg1 b5 (31... Bf6 $16) 32. Rc1 (32. c5 dxc5 33. Qxc5 Qd7
$16) 32... Bf8 (32... Qa5 33. Bb2 Bf6 34. Rg1 Qxa2 35. Qc2 bxc4 36. bxc4 $14)
33. Rg1 Qa5 (33... Bg7 $142 $5 $11 {and Black hangs on}) 34. Bb2 $16 Bg7 (34...
bxc4 35. bxc4 Bg7 36. Ba1 $16) 35. Ba1 (35. c5 Qxa2 36. Qc2 Rc8 $16) 35... bxc4
36. bxc4 Qa3 37. Re2 Qb4 {[%tqu "En","","","","c4c5","",10]} 38. c5 $1 {
Deflection: e5} dxc5 (38... Qxc5 39. Qxc5 dxc5 40. Bxe5 {Overloading Deflection
}) (38... dxc5 39. Bxe5 {Deflection}) 39. Bxe5 $18 Bxe5 40. Rxe5 c4 $2 (40...
Qd4 $142 41. Qxd4 cxd4 $18) 41. Qd4 Qa4 (41... Qb6 42. Qxc4 Rg3 $18) 42. Re4+ (
42. Re7+ R6g7 43. d6 h6 44. d7 Qc2 45. Rxg7 Rxg7 46. d8=Q+ Kh7 47. Q8f6 Qg6 48.
Qxg6+ Kxg6 49. Re1 Rf7 50. Qh8 h5 51. Re6+ Kg5 52. Qd8+ Re7 53. Qxe7+ Kf5 54.
Qf6#) 42... R6g7 43. Qxc4 (43. Rxf4 Qxa2 44. Rg4 Qe2 $18) 43... Qxc4 44. Rxc4
Rf7 (44... Rd8 45. Rd1 Rgd7 46. Rc6 $18) 45. Re1 (45. Rd1 {and White can
already relax} Rd8 46. d6 Kg7 $18) 45... a5 (45... Rd7 46. Re5 Rb7 47. Re2 $18)
46. Re2 (46. Rd1 {and White can already relax} Kg7 $18) 46... Kg7 (46... Rd8
47. Rd2 $18) 47. Ree4 Rgf8 48. d6 (48. Ra4 {makes it even easier for White} Rd7
49. Rxa5 Rf6 $18) 48... Kg6 (48... Rd8 {is not much help} 49. Red4 $18) 49. Rc5
(49. Re6+ {keeps an even firmer grip} Kg7 50. Re7 Kh6 $18) 49... Rf5 (49... Rd7
50. Rd4 Rf6 51. Rcd5 $18) 50. Rxf5 (50. Re6+ {might be the shorter path} R5f6
51. Rxf6+ Kxf6 52. Rxa5 Ke6 $18) 50... Kxf5 51. Re7 h5 (51... h6 {doesn't get
the bull off the ice} 52. Ra7 $18) 52. h4 (52. Ra7 $142 {seems even better} Ke6
53. Rxa5 Kxd6 $18) 52... Ra8 (52... Rf6 $18 {is one last hope}) 53. a4 Kf6 54.
Rb7 Ra6 55. Rb5 Rxd6 56. Rxh5 (56. Rxh5 Kg7 57. Kh2 $18) 1-0

[Event "SapporoSummer2022"]
[Site "?"]
[Date "2022.07.17"]
[Round "1.2"]
[White "Ishii, Hibiki"]
[Black "Nishimori, Toshiyuki	"]
[Result "1-0"]
[ECO "B33"]
[WhiteElo "1349"]
[BlackElo "1684"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "123"]
[SourceVersionDate "2022.07.18"]

{[%mdl 8192] B33: Sicilian: Pelikan and Sveshnikov Variations} 1. e4 c5 2. Nf3
Nc6 3. Nc3 Nf6 4. d4 cxd4 5. Nxd4 e5 6. Nb3 Bb4 7. f3 O-O $146 (7... d5 8. exd5
(8. Bg5 dxe4 9. Qxd8+ Nxd8 10. Bxf6 Bxc3+ 11. bxc3 gxf6 12. fxe4 Ke7 13. Bd3
Be6 14. Kd2 Rg8 15. g3 Rc8 16. Raf1 Bh3 17. Rf2 Ne6 18. Na5 Nc5 19. c4 b6 20.
Nb3 Nb7 21. a4 Nd6 22. Kc3 Rxc4+ {Karaklajic,M (2200)-Cramling,D (2355) Reggio
Emilia 1979 0-1 (51)}) 8... Nxd5 9. Bd2 Bxc3 (9... Nxc3 10. bxc3 Bd6 11. Bd3
Qh4+ 12. g3 Qh3 13. Qe2 O-O 14. O-O-O a5 15. a4 Be6 16. Be3 Ba3+ 17. Kb1 Rfc8
18. Ka2 Bf8 19. g4 Qh4 20. Bc1 Ne7 21. Qxe5 Nd5 22. Bb2 Be7 23. c4 Bf6 24. Qe4
{Cave,C (2276)-Amir,K (2250) Mallorca 2004 0-1 (71)}) 10. Bxc3 O-O 11. Qd2 Nxc3
12. Qxd8 Rxd8 13. bxc3 Bf5 14. Rc1 Rac8 15. g4 Be6 16. Rd1 Rxd1+ 17. Kxd1 Ne7
18. Kd2 Nd5 19. c4 Nb6 20. Na5 Bxc4 21. Bxc4 Nxc4+ 22. Nxc4 {Puskas,M (2220)
-Bokros,A (2365) Dunajska Streda 1998 0-1 (37)}) (7... d5 8. Bg5 d4 $15) 8. Be3
(8. Bc4 $142 $5 $15 {deserves consideration}) 8... d5 $17 9. exd5 Nxd5 10. Qd2
Nxe3 11. Qxe3 Nd4 {Black threatens to win material: Nd4xc2} (11... Ne7 $142 $17
) 12. O-O-O $11 Nxb3+ 13. cxb3 {White has new doubled pawns: b2+b3.} Qc7 14.
Bc4 Bf5 (14... Bc5 15. Qg5 h6 16. Qh5 $11) 15. g4 {White threatens to win
material: g4xf5} (15. Rhe1 $5 Rad8 16. Nd5 Rxd5 17. Rxd5 Bxe1 18. Qxe5 Qxe5 19.
Rxe5 $14) 15... Bg6 16. h4 Bc5 {Black threatens to win material: Bc5xe3} 17.
Qe2 h6 18. h5 {White threatens to win material: h5xg6} Bh7 19. Rh2 (19. g5 hxg5
20. h6 Rad8 $11) 19... a6 {Covers b5} (19... Rfd8 20. Rhh1 $15) 20. Bd3 $15
Bxd3 21. Rxd3 Bd4 {Black can be proud of that piece} 22. Qc2 (22. Qe4 Rad8 $11)
22... Rac8 23. Rg2 b5 24. b4 $2 (24. Kb1 Rfe8 $15) 24... Qe7 (24... a5 $142 $5
25. Qb3 a4 $17) 25. a3 $15 Qg5+ 26. Qd2 Qxd2+ (26... Qh4 27. g5 hxg5 28. Qxg5
Qxg5+ 29. Rxg5 $15) 27. Rgxd2 (27. Rdxd2 $2 Be3 $19) (27. Kxd2 $6 Rfd8 $11)
27... Rc6 (27... f5 28. Kc2 $15) 28. Kb1 Rfc8 29. Ne2 Bb6 30. Nc3 f6 (30... Bd4
31. Kc2 $11) 31. Nd5 (31. Rd7 Bd4 32. Ne2 Be3 $14) 31... Rc1+ (31... Kf8 $5 $11
) 32. Ka2 $14 Rb8 (32... Bd8 $5 $14 {is an interesting idea}) 33. Nxb6 $16 Rxb6
34. Rd8+ Kf7 35. R2d7+ Ke6 36. Rxg7 Rf1 (36... Rd6 $142 37. Rxd6+ Kxd6 $16) 37.
Rdd7 (37. Re8+ $142 Kd5 38. g5 fxg5 39. Rg6 $18) 37... f5 $4 (37... Rd6 $142 {
saving the game} 38. Rxd6+ Kxd6 $14) 38. Rge7+ (38. Rc7 $142 {and White has
reached his goal} Kd6 39. Rc5 $18) 38... Kf6 39. Rf7+ Kg5 40. Rxf5+ Kh4 41. Re7
(41. Rxe5 $6 Rxf3 42. Rg7 Rf1 $16) 41... Rd6 42. Rexe5 Rdd1 $2 (42... Rf2 43.
Re3 $18) 43. Re2 (43. Rf6 {seems even better} Rd3 $18) 43... Ra1+ (43... Rd6
44. g5 hxg5 45. h6 $18) 44. Kb3 Rad1 45. Rf6 Kg5 46. Rg6+ Kh4 (46... Kf4 {
doesn't get the cat off the tree} 47. Rxh6 Rxf3+ 48. Kc2 $18) 47. Rxh6 (47. Re3
$142 $5 {keeps an even firmer grip} Rd2 48. Ka2 Kg3 49. Rxh6 Rd7 $18) 47...
Rxf3+ 48. Kc2 Rd5 (48... Rd4 {is not the saving move} 49. Rxa6 Rxg4 50. h6 $18)
49. Rg6 Rd4 (49... Rf7 {cannot change destiny} 50. h6 Rd8 51. Kb1 $18) 50. h6
Rxg4 (50... Rd8 {a last effort to resist the inevitable} 51. h7 Rff8 $18) 51.
Rh2+ (51. h7 Rxg6 52. h8=Q+ Kg3 53. Qh2+ Kg4 54. Rg2+ Kf5 55. Qh5+ Kf4 56. Qxg6
Ke5 57. Rg5+ Kf4 58. Rf5+ Ke3 59. Qg1+ Ke4 60. Qg4+ Ke3 61. Rxf3+ Ke2 62. Qe4#)
51... Kg3 52. Rxg4+ Kxh2 53. Rh4+ Kg3 54. h7 Kxh4 55. h8=Q+ Kg3 56. Qg7+ Kf2 (
56... Kf4 {does not help much} 57. Qf6+ Ke4 58. Qc6+ Ke3 59. Qxa6 Rf2+ 60. Kc3
$18) 57. Qg6 Ke2 58. Qxa6 Rf2 (58... Rh3 {does not save the day} 59. Qxb5+ Ke1
60. Qd5 Rh2+ 61. Kc3 Rf2 62. b5 Kf1 63. b6 Rf8 64. Qc6 Ke1 65. Qh1+ Kf2 66.
Qh2+ Kf3 67. b7 Rg8 68. Qd6 Kf2 69. Qd4+ Kg3 70. Qg1+ Kf4 71. Qxg8 Kf5 72. b8=Q
Ke4 73. Qbg3 Kf5 74. Q8g6#) 59. Qxb5+ Ke1+ 60. Kb3 (60. Kc3 Re2 61. Qc5 Kf1 62.
Qc4 Ke1 63. Qh4+ Kf1 64. Qf4+ Ke1 65. b5 Re8 66. b6 Rc8+ 67. Kb4 Ke2 68. Qg4+
Kf1 69. Qxc8 Ke2 70. Qg4+ Kd3 71. b7 Kc2 72. Qe2+ Kc1 73. Kb3 Kb1 74. Qe1#)
60... Kd2 (60... Rf3+ {does not improve anything} 61. Kc4 Rf2 62. Qe5+ Kf1 63.
b5 Rc2+ 64. Qc3 Re2 65. b6 Rh2 66. Qd3+ Kg2 67. Qg6+ Kf1 68. Qf5+ Kg1 69. Qg4+
Rg2 70. Qd4+ Kf1 71. Qd3+ Kf2 72. b7 Rg8 73. Qd5 Rb8 74. Qf5+ Kg2 75. Qg4+ Kf2
76. Qf4+ Kg1 77. Qxb8 Kf1 78. Qf4+ Ke1 79. Kd3 Kd1 80. Qd2#) 61. Qd5+ Kc1 (
61... Ke3 {cannot change what is in store for White} 62. b5 Kf4 63. Qd6+ Kg4
64. b6 Rf3+ 65. Ka2 Rg3 66. b7 Rh3 67. b8=Q Kf3 68. Qf4+ Ke2 69. Qbe5+ Re3 70.
Qexe3+ Kd1 71. Qd2#) 62. Qc5+ (62. Qc5+ Kd2 63. Qxf2+ Kd3 64. Qf4 Ke2 65. Kc3
Ke1 66. Kd3 Kd1 67. Qd2#) 1-0

[Event "SapporoSummer2022"]
[Site "?"]
[Date "2022.07.17"]
[Round "1.3"]
[White "Ogawa, Taishi"]
[Black "Ito, Katsuhide"]
[Result "1-0"]
[ECO "B33"]
[WhiteElo "1613"]
[BlackElo "1296"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "57"]
[SourceVersionDate "2022.07.18"]

{[%mdl 8192] B33: Sicilian: Pelikan and Sveshnikov Variations} 1. e4 c5 2. Nf3
Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Nd5 Be7
10. Bd3 $146 (10. Bxf6) (10. Nxe7 Kxe7 11. Qh5 h6 12. Bxf6+ gxf6 13. c3 Qg8 14.
Qd1 Be6 15. Nc2 Qg6 16. Qf3 f5 17. exf5 Qxf5 18. Qxf5 Bxf5 19. Ne3 Be6 20. g3
d5 21. Bg2 e4 22. f4 f5 23. Bh3 Kf6 24. Rd1 Rhd8 {Bura,R (2183)-Glisic,P (2152)
Belgrade 2013 1/2-1/2 (57)}) (10. Nxf6+ Bxf6 11. c3 O-O 12. Nc2 Rb8 {1/2-1/2 
(12) Mauro,A (2240)-Guerra,U (2340) Forli 1990}) (10. Bxf6 Bxf6 (10... gxf6
$143 11. c4 $16) 11. c4 b4 $11) 10... O-O (10... Nxd5 $142 $5 11. exd5 Bxg5 12.
dxc6 Be6 $17) 11. Nxe7+ $11 Qxe7 12. c3 {Consolidates b4+d4} h6 {Black
threatens to win material: h6xg5} 13. Bd2 $2 (13. Bxf6 $5 {is worth looking at}
Qxf6 14. O-O $11) 13... Rb8 (13... Rd8 14. Qe2 $17) 14. Nc2 Rd8 15. O-O (15.
Ne3 Be6 $17) 15... d5 16. f3 a5 (16... dxe4 17. Bxe4 Nxe4 18. fxe4 $17) 17. Qe2
Qa7+ (17... dxe4 18. Bxe4 Nxe4 19. fxe4 $17) 18. Kh1 (18. Be3 Qb7 19. exd5 Nxd5
20. Rfd1 $11) 18... Ba6 (18... dxe4 $142 19. Bxe4 Nxe4 20. fxe4 Bg4 $17) 19. a4
$14 dxe4 20. fxe4 (20. Bxb5 $142 exf3 21. Rxf3 Bxb5 22. axb5 Rxd2 23. Qxd2 Rxb5
24. Ne3 $14) 20... Rb6 $4 {there were better ways to keep up the pressure} (
20... Qd7 $142 {would allow Black to play on} 21. Rxf6 Qxd3 22. Qxd3 Rxd3 23.
Rxc6 Rxd2 $15) 21. Be3 (21. Rxf6 $142 gxf6 22. Be3 bxa4 23. Bxb6 Qxb6 24. Bxa6
Qxb2 25. Rf1 $18) 21... Nd4 $4 {further deteriorates the position} (21... bxa4
$142 22. Ne1 Bxd3 23. Nxd3 Qc7 $16) 22. cxd4 $18 (22. Bxd4 $6 exd4 23. axb5
dxc3 24. Rxa5 cxb2 25. Rxa6 Qxa6 26. bxa6 b1=Q $18) 22... Rbd6 (22... bxa4 {
praying for a miracle} 23. d5 Bxd3 24. Qxd3 Qa6 25. Qxa6 Rxa6 26. Rxa4 Rb8 $18)
23. dxe5 Qxe3 24. Nxe3 (24. exf6 $6 {is a useless try} Qxd3 25. Qxd3 Rxd3 26.
axb5 Bxb5 27. Rxa5 Rb3 $11) 24... Rxd3 25. exf6 Rd2 26. Qg4 g6 27. Nf5 h5 (
27... R2d6 {doesn't change anything anymore} 28. Nxh6+ Kf8 29. Qh4 Re6 30. Nxf7
Kxf7 31. Qh7+ Ke8 32. Rad1 Rxf6 33. Qh8+ Kf7 34. Rxf6+ Ke7 35. Qxd8#) 28. Qg5
Bc8 (28... Kf8 {doesn't change the outcome of the game} 29. Qh6+ Ke8 30. Ng7+
Kd7 31. Qxd2+ Kc7 32. Rac1+ Kb7 33. Qxd8 bxa4 34. Rc7+ Kb6 35. Qd6+ Kb5 36.
Qc5#) 29. Qh6 (29. Qh6 Bxf5 30. Qg7#) 1-0

[Event "SapporoSummer2022"]
[Site "?"]
[Date "2022.07.17"]
[Round "1.4"]
[White "Fujii, Nathan"]
[Black "Aoki, Yasuhiro"]
[Result "0-1"]
[ECO "A05"]
[BlackElo "1566"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "78"]
[SourceVersionDate "2022.07.18"]

{[%mdl 8256] A05: R騁i Opening: 1 Nf3 Nf6} 1. e4 d6 2. Nf3 Nf6 3. d3 g6 4. g3
Bg7 5. Bg2 O-O 6. O-O c5 7. Nbd2 Nc6 8. Qe2 (8. Nc4 h6 9. Bd2 e5 10. Re1 Be6
11. Ne3 d5 12. exd5 Nxd5 13. Nxd5 Bxd5 14. c4 Be6 15. Bc3 Qb6 16. Qe2 f6 17.
Nd2 Rfe8 18. Qe3 f5 {1/2-1/2 (18) Nikolac,J (2470)-Lalic,B (2600) Zadar 1997})
8... e5 9. c3 Re8 $146 (9... Ne8 10. Ne1 f5 11. f4 Nf6 12. Nc4 fxe4 13. dxe4
exf4 14. Bxf4 d5 15. exd5 Nxd5 16. Rd1 Nxf4 17. Rxf4 Qc7 18. Bd5+ Kh8 19. Rxf8+
Bxf8 20. Bxc6 bxc6 21. Qe5+ Qxe5 22. Nxe5 Be6 23. b3 a5 24. N1d3 {Ikeda,J 
(2275)-Smirnov,V (2392) Sydney 2010 1/2-1/2 (80)}) 10. h3 {Controls g4} d5 11.
Kh2 (11. exd5 Nxd5 12. Rd1 h6 $15) 11... dxe4 (11... d4 12. Rd1 $15) 12. dxe4 (
12. Nxe4 Nxe4 13. dxe4 b6 $11) 12... Be6 13. a4 Qc7 {Black has an active
position} 14. Ng5 Rad8 (14... Bd7 $142 $5 $15 {would keep Black in the game})
15. Nxe6 $14 {White forks: c5, c7+d8} Rxe6 {White has the pair of bishops} 16.
Nc4 Re7 17. f4 Nh5 18. f5 Red7 19. fxg6 hxg6 20. Bg5 f6 {Black threatens to
win material: f6xg5} 21. Be3 Bf8 (21... Rd3 $5 22. Rf3 Na5 23. Nxa5 Qxa5 24.
Bxc5 Rd2 25. Qc4+ Kh7 $16) 22. Bf3 Ng7 23. Bg4 Rf7 24. Bh6 Kh7 25. Bd2 (25. Bc1
Kg8 $16) 25... Ne7 (25... f5 $5 26. exf5 gxf5 27. Bxf5+ Rxf5 28. Rxf5 Nxf5 29.
Qh5+ Kg8 30. Qxf5 Qf7 31. Qg4+ Qg7 $18) 26. Rf2 f5 $2 (26... Nc8 $142 $16) 27.
Raf1 $18 f4 28. gxf4 exf4 29. Bxf4 $4 {releasing the pressure on the opponent.}
(29. Kg1 $142 {a pity that White didn't try this} g5 30. h4 $18) {[%tqu "En",
"","","","f7f4","",10]} 29... Rxf4 $14 {Mate threat} 30. Rxf4 (30. Rxf4 g5 {
Combination}) (30. Z0 $140 Rxf2+ {Mate threat}) 30... g5 31. e5 gxf4 32. Qe4+ {
White forks: f4} Kg8 (32... Ng6 33. Rxf4 Qc6 34. Bf3 $11) 33. Rxf4 (33. Qxf4
$142 Nc6 34. Bd1 Nxe5 35. Bb3 (35. Qxe5 $2 Qxe5+ 36. Nxe5 Bd6 $19) 35... Nxc4
36. Bxc4+ Kh7 37. Qxc7 Bd6+ 38. Qxd6 Rxd6 39. Kg3 $18) 33... Re8 $4 {forfeits
the clear win} (33... Qc6 $142 $5 $11 {would keep Black alive}) 34. Be2 (34.
Nd6 $142 {secures the win} Qc6 35. Qxc6 Nxc6 36. Nxe8 Nxe8 37. Be6+ Kg7 38.
Rf7+ Kg8 39. Rxb7+ Kh8 40. Bd7 Nxe5 41. Bxe8 $18) 34... Qc6 (34... Ngf5 $142
35. Bh5 Rd8 36. Rxf5 Nxf5 37. Qxf5 Qg7 $16) 35. Qe3 $4 {ignoring the path to
victory} (35. Nd6 $142 {would have given White a clear advantage} Qxe4 36. Rxe4
$18) 35... Nd5 $19 36. Rxf8+ $4 {White has lost his nerve... understandable
when you consider his position} (36. Bf3 $142 Nxe3 37. Bxc6 bxc6 38. Nxe3 Rxe5
39. Nc4 Re2+ 40. Kg1 $19) 36... Rxf8 37. Qg3 Nf4 38. Bf3 (38. Bf1 {a fruitless
try to alter the course of the game} Kh8 $19) 38... Qxa4 39. Bd5+ (39. Ne3 {
desperation} Qb5 40. Qf2 $19) 39... Nxd5 (39... Nxd5 40. Qd3 Rf2+ 41. Kg3 Rg2+
42. Kf3 Qd7 43. Qd1 Qxh3+ 44. Ke4 Nb6 45. Qf3 Qh7+ 46. Ke3 Nxc4+ 47. Kf4 Ne6#)
0-1

[Event "SapporoSummer2022"]
[Site "?"]
[Date "2022.07.17"]
[Round "1.5"]
[White "Takeuchi, Hiroshi"]
[Black "Misawa, Hideki"]
[Result "0-1"]
[ECO "A48"]
[WhiteElo "1393"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "104"]
[SourceVersionDate "2022.07.18"]

{[%mdl 8192] A48: 1 d4 Nf6 2 Nf3 g6: Torre, London and Colle Systems} 1. d4 Nf6
2. Bf4 g6 3. e3 Bg7 4. Nf3 O-O 5. h3 d6 6. Bd3 c5 7. c3 Nc6 (7... b6 8. O-O Bb7
9. Bh2 Nbd7 10. Nbd2 Re8 11. Re1 e5 12. dxe5 Nxe5 13. Bb5 Re7 14. Nxe5 {
1/2-1/2 (14) Lechtynsky,J (2450)-Georgiev,K (2440) Albena 1985}) 8. O-O Re8 (
8... cxd4 9. exd4 Qb6 10. Nbd2 Be6 11. Nc4 Bxc4 12. Bxc4 Qxb2 13. Qb3 Qxb3 14.
axb3 d5 15. Bd3 a6 16. b4 Rfc8 17. Rfb1 Na7 18. b5 Nxb5 19. Bxb5 axb5 20. Rxa8
Rxa8 21. Rxb5 Ne4 22. Rxb7 Bf6 23. Rc7 {Duboue,P (2312)-Barbot,P (2461)
Saint-Quentin 2015 1/2-1/2 (42)}) 9. Bb5 $146 (9. Bh2 cxd4 10. cxd4 e5 11. dxe5
dxe5 12. Bb5 Nd5 13. e4 Nf4 14. Nc3 Be6 15. Qxd8 Rexd8 16. Ng5 Rd2 17. Nxe6
fxe6 18. Rab1 Nd4 19. Rfd1 Rxd1+ 20. Rxd1 Rc8 21. Bf1 g5 22. g3 Ng6 23. Kg2 a6
{Londyn,R (2152)-Vokac,M (2490) Pardubice 2003 0-1 (48)}) 9... Bd7 10. c4 (10.
dxc5 e5 11. Bh2 e4 $11) 10... e5 (10... cxd4 11. exd4 e5 12. dxe5 dxe5 13. Bxc6
exf4 14. Bxd7 Nxd7 15. Nc3 $15) 11. dxe5 $15 dxe5 ({Weaker is} 11... Nxe5 12.
Nc3 $11) 12. Bxc6 (12. Bg5 a6 13. Ba4 Bf5 $15) 12... exf4 $17 ({Instead of} 
12... bxc6 13. Bxe5 Ne4 14. Bxg7 Kxg7 15. Nbd2 $16) (12... Bxc6 $6 13. Qxd8
Raxd8 14. Nxe5 $15) 13. exf4 $4 {cause more grief.} (13. Bxd7 $142 Nxd7 14. Qb3
$17) 13... Bxc6 $19 14. Nbd2 (14. Nc3 {does not improve anything} Nh5 15. Nd5
Bxd5 16. Qxd5 Qxd5 17. cxd5 Nxf4 $19) 14... Ne4 (14... Nh5 $142 $5 {and Black
can already relax} 15. f5 Bxb2 16. Rb1 $19) 15. Nxe4 Qxd1 (15... Rxe4 $5 {
seems even better} 16. Ne5 $19) 16. Raxd1 Bxe4 (16... Rxe4 {and Black can
already relax} 17. Ne5 $19) 17. Ng5 (17. Ne5 {does not win a prize} Bxe5 18.
fxe5 Rxe5 $19) 17... Bc6 18. b3 Rad8 19. h4 (19. Nf3 {cannot undo what has
already been done} f6 $19) 19... Rxd1 20. Rxd1 Bd4 21. Kf1 h6 22. Nh3 Bd7 (
22... b5 $5 {makes it even easier for Black} 23. f5 $19) 23. Ng1 Re4 (23... Bg4
$142 $5 {keeps an even firmer grip} 24. f3 Be6 25. Ne2 $19) 24. Ne2 b5 (24...
Re6 {might be the shorter path} 25. f3 $19) 25. f3 Re7 (25... Re6 {makes it
even easier for Black} 26. Nxd4 Rd6 27. cxb5 cxd4 28. a4 $19) 26. Nxd4 cxd4 27.
Rxd4 (27. c5 Be6 $19) 27... bxc4 28. bxc4 Be6 29. a3 (29. c5 Bxa2 30. Kf2 Rc7
$19) 29... Rc7 30. Kf2 Bxc4 31. g4 Kg7 32. Rd8 (32. Re4 Be6 $19) 32... Bb5 33.
Ra8 (33. f5 {hardly improves anything} Rc2+ 34. Kg3 Rc3 $19) 33... Rc2+ 34. Kg3
Bf1 (34... a6 {might be the shorter path} 35. a4 Bf1 36. f5 gxf5 37. Re8 $19)
35. Rxa7 (35. f5 gxf5 36. Rxa7 Rg2+ 37. Kf4 fxg4 38. fxg4 Be2 $19) 35... Rg2+
36. Kh3 Ra2+ (36... h5 $142 $5 {seems even better} 37. gxh5 gxh5 38. a4 $19)
37. Kg3 Bc4 38. Ra5 Ra1 39. Kg2 Rf1 (39... Be6 40. Kg3 $19) 40. Ra4 $2 (40. f5
$5 $17) 40... Be2 41. Re4 $2 (41. Rb4 $142 $19) 41... Bxf3+ 42. Kxf1 Bxe4 43.
Ke2 (43. a4 {does not solve anything} Kf6 44. Kf2 Bb7 $19) 43... Kf6 44. Ke3 (
44. a4 {doesn't improve anything} h5 45. gxh5 gxh5 $19) 44... Bb7 (44... Bc6 {
and Black can already relax} 45. Kf2 $19) 45. Kd4 (45. Kf2 h5 46. Kg3 Bc8 47.
gxh5 gxh5 $19) 45... Bc8 46. g5+ (46. Ke4 {doesn't do any good} Bxg4 47. a4 Bc8
$19) 46... hxg5 47. hxg5+ (47. fxg5+ Kf5 48. a4 $19) 47... Kf5 48. Ke3 Bd7 49.
Kf3 Bc6+ (49... Bb5 $142 {keeps an even firmer grip} 50. Ke3 $19) 50. Kg3 (50.
Ke3 {hoping against hope} Be8 51. Kf3 $19) 50... Bd5 51. a4 Bc6 52. a5 Bb7 (
52... Bb7 53. Kf2 Kxf4 $19) 0-1

[Event "SapporoSummer2022"]
[Site "?"]
[Date "2022.07.17"]
[Round "2.1"]
[White "Aoki, Yasuhiro"]
[Black "Yoshii, Yukihiko"]
[Result "1-0"]
[ECO "A29"]
[WhiteElo "1566"]
[BlackElo "1686"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "133"]
[SourceVersionDate "2022.07.18"]

{[%mdl 8192] A29: English Opening: Four Knights Variation with 4 g3} 1. c4 e5
2. Nc3 Nf6 3. Nf3 Nc6 4. g3 d6 5. Bg2 Be7 6. O-O O-O 7. d3 h6 (7... Be6 8. Ng5
Nd7 9. Nxe6 fxe6 10. Rb1 Rb8 11. b4 Nd4 12. e3 Nf5 13. Ne2 Bf6 14. d4 exd4 15.
e4 Ne7 16. Nxd4 Bxd4 17. Qxd4 Nc6 18. Qc3 Qf6 19. Qxf6 Rxf6 20. f4 e5 21. Be3
a5 22. Bh3 {Von Herman,U (2416)-Kevorkov,A (2277) Germany 2013 1-0 (45)}) 8.
Rb1 Rb8 $146 (8... Be6 9. Nd2 (9. b4 a6 10. a4 e4 11. dxe4 Bxc4 12. b5 Na5 13.
Nd4 Re8 14. Nf5 Bf8 15. Be3 Be6 16. Nd4 Bc8 17. Qd3 Ng4 18. Bc1 Ne5 19. Qc2
Nac4 20. f4 Nd7 21. Nd5 Ndb6 22. Nxb6 Nxb6 23. Bd2 axb5 {Balduan,M (2289)
-Kujovic,M (2406) Germany 2003 1/2-1/2}) 9... a5 10. Nd5 Nd7 11. Ne4 f5 12.
Nec3 Nc5 13. Be3 Bd7 14. Nxe7+ Qxe7 15. Nd5 Qd8 16. d4 Ne6 17. dxe5 dxe5 18.
Bd2 Be8 19. e3 Qg5 20. f4 Qh5 21. Bc3 Qxd1 22. Rbxd1 Bh5 23. Rd2 {Spulber,C 
(2326)-Posedaru,B (2190) Eforie Nord 2007 1-0 (49)}) (8... a5 9. a3 Be6 10. b4
axb4 11. axb4 e4 12. dxe4 Bxc4 13. b5 Na5 14. Nd4 Nd7 15. Nd5 Bxd5 16. exd5 Bf6
17. Nf5 Nc5 18. Qc2 b6 19. Rb4 Nab7 20. Rg4 Kh8 21. Bb2 Rg8 22. h4 Ra2 23. Bxf6
{Charon Mustelier,M (2167)-Espinosa Escala,R (2251) Havana 2011 1/2-1/2 (33)})
9. b4 a6 {Consolidates b5} 10. a4 Qe8 (10... Be6 11. b5 Nd4 12. Nxd4 exd4 13.
Nd5 Nxd5 14. cxd5 $14) 11. b5 $14 axb5 12. axb5 Nd8 13. b6 (13. Ra1 Ne6 $16)
13... c6 {Prevents intrusion on b5+d5} 14. Qa4 Ne6 15. Qa7 {White threatens to
win material: Qa7xb8} (15. Ra1 Nc5 16. Qb4 e4 17. dxe4 Nfxe4 18. Nxe4 Nxe4 $14)
15... Bd7 $11 16. Qa2 Qc8 (16... Ra8 17. Qb2 $15) 17. Bd2 (17. Qb2 Ra8 $14)
17... Ra8 {Black threatens to win material: Ra8xa2} 18. Qb2 Qb8 19. Ra1 Nc5 20.
Rxa8 Qxa8 21. Ra1 {White threatens to win material: Ra1xa8} Na6 (21... Qb8 22.
Na4 Ne6 23. Nh4 $14) 22. e4 (22. d4 Qb8 $14) 22... Qb8 23. d4 exd4 24. Nxd4 Re8
25. Nd1 (25. e5 $5 dxe5 26. Nxc6 Bxc6 27. Bxc6 $14) 25... Bf8 26. f3 {Covers g4
} Qc8 (26... d5 $5 {should be considered} 27. exd5 cxd5 $11) 27. Ne3 Kh7 (27...
Nc5 28. Nb3 d5 29. cxd5 cxd5 30. exd5 (30. Nxd5 Nxd5 31. Nc1 Na4 32. Rxa4 Bxa4
33. exd5 Qc5+ 34. Kh1 Qf2 $19) 30... Nxb3 31. Qxb3 $11) 28. Bc3 Nh5 29. Rd1 g6
{Secures f5} (29... Nc5 30. Qa3 $14) 30. Ne2 (30. Nb3 Be7 $16) 30... Be6 {
Black has a cramped position} 31. g4 {White threatens to win material: g4xh5}
Ng7 32. Nf4 Nc5 33. Qb1 (33. Be1 h5 34. h3 Qd8 $11) 33... Nd7 (33... Bd7 34.
Bf6 $11) 34. h4 {Black has a cramped position} (34. Bd4 Ne5 $14) 34... Ne5 (
34... Qd8 35. Nfd5 cxd5 36. cxd5 Qxh4 37. dxe6 Nxe6 38. Qb5 $11) 35. h5 {
White gets more space} (35. Qc2 Kg8 $16) 35... g5 {Black threatens to win
material: g5xf4} 36. Ne2 (36. Nxe6 $5 {should be examined more closely} Nxe6
37. Qc2 $14) 36... Nxc4 $15 37. e5+ $2 (37. Nxc4 $142 $5 {and White is still
in the game} Bxc4 38. Ng3 $15) 37... Kg8 $17 38. Nxc4 Bxc4 39. Ng3 dxe5 40. Ne4
(40. Kh1 Bd5 41. Re1 Qb8 $19) 40... Qe6 41. Rd7 Rb8 42. Qa1 (42. Qb2 $142 Bd5
43. Nf6+ Qxf6 44. Bxe5 $19) 42... Ba6 $4 {Black loses the upper hand} (42...
Bd5 $142 {would have given Black the upper hand} 43. Nf6+ Qxf6 44. Bxe5 Qe6 45.
Rxd5 cxd5 (45... Qxd5 $6 46. Bxb8 Qc5+ 47. Kh2 $19) 46. Bxb8 Qxb6+ 47. Kh1 Ne6
$19) 43. Bxe5 $11 Re8 $4 {gives the opponent counterplay} (43... Ne8 44. Rxb7
Rxb7 45. Qxa6 Qxe5 46. Qxb7 Nf6 47. Qxc6 Nxe4 48. Qxe4 Bc5+ 49. Kf1 Qb2 $17)
44. Nf6+ $18 Kh8 45. Qb1 (45. Bc3 $142 {secures victory} Be7 46. Nxe8 Qxd7 47.
Bxg7+ (47. Nxg7 $143 Kh7 $18) 47... Kg8 48. Bxh6 Bc5+ 49. Kh2 $18) 45... Nf5
46. Qxf5 $4 {allows the opponent back into the game} (46. f4 $142 {and White
gets the upper hand} gxf4 47. Qe4 (47. gxf5 {is the less attractive alternative
} Qxe5 48. Rxf7 Bg7 49. Rxg7 Kxg7 (49... Qxf6 $6 50. Rg6 Qc3 51. Kh2 $11) 50.
Nxe8+ Qxe8 $17) 47... Qxe5 48. Rxf7 $18 (48. Nxe8 $6 {is clearly weaker} Qc5+
49. Kh2 Qf2 50. Qxf5 Qg3+ 51. Kh1 Qe1+ 52. Kh2 Qg3+ 53. Kh1 Qe1+ 54. Kh2 Qg3+
$11)) 46... Qxf5 $15 47. gxf5 Rxe5 48. Ng4 $4 {A valuable piece} (48. Bf1 Bxf1
49. Kxf1 Rxf5 $15) 48... Re1+ $4 {overlooking an easy win} (48... Rxf5 $142 {
nails it down} 49. Bf1 Bc5+ 50. Kg2 Rd5 51. Rxd5 Bxf1+ (51... cxd5 $143 52.
Bxa6 bxa6 53. b7 $16) 52. Kxf1 cxd5 53. Nxh6 Kg7 54. Nf5+ Kf6 $19) 49. Kf2 $11
{White threatens to win material: Kf2xe1} Re2+ 50. Kg3 Kg8 $4 (50... Re8 51.
Nf6 Re7 52. Rd8 $11) 51. Nf6+ (51. Rd8 $142 {and White wins} f6 52. Bf1 $18)
51... Kg7 $14 {Black threatens to win material: Kg7xf6} 52. Ne4 Rb2 $2 (52...
Re3 $142 {and Black could well hope to play on} 53. f6+ Kg8 $14) 53. f6+ $18
Kg8 54. Bh3 $4 {hands over the advantage to the opponent} (54. Rd8 $142 {
White would have gained the upper hand} c5 55. Nxc5 $18) 54... Rxb6 $11 55. Nd6
$2 (55. Rd8 $142 {and White is still in the game} c5 56. Nxc5 $11) 55... c5 $19
56. Ne8 $4 {White crumbles in face of a dire situation} (56. Ne4 Rc6 57. Rd8
$19) 56... Rc6 (56... c4 {might be the shorter path} 57. Nc7 Rxf6 58. Nxa6 $19)
57. Bf5 (57. Rd8 $19) 57... b5 (57... c4 $142 $19 {and the result of the game
is clear: Black will win}) 58. Be4 $14 {White threatens to win material: Be4xc6
} Rc8 $4 (58... Re6 59. Bd5 Bc8 60. Bxe6 Bxd7 61. Bxd7 $18) 59. Nd6 (59. Bd5
$142 {and White has prevailed} Kh8 60. Bxf7 $18) 59... Bxd6+ $4 (59... b4 $142
{and Black has air to breath} 60. Nxf7 Bb5 61. Nxh6+ Bxh6 $11) 60. Rxd6 $18 c4
$2 (60... b4 $142 61. Rxa6 Rb8 $18) 61. Rxa6 c3 (61... b4 62. Rb6 b3 63. Bf5
$18) 62. Bc2 b4 (62... Kf8 {is the last straw} 63. Bf5 Rb8 $18) 63. Rb6 Kf8 64.
Rxb4 Ke8 65. Rd4 Rc5 (65... Rb8 {does not win a prize} 66. Ba4+ Kf8 67. Bb3 $18
) 66. Kf2 (66. Ba4+ Rc6 67. Bxc6+ Kf8 68. Rd8#) 66... Rc6 (66... Rc8 $18 {
there is nothing else anyway}) 67. Ba4 (67. Ba4 c2 68. Bxc6+ Kf8 69. Rd8#) 1-0

[Event "SapporoSummer2022"]
[Site "?"]
[Date "2022.07.17"]
[Round "2.2"]
[White "Misawa, Hideki"]
[Black "Ogawa, Taishi"]
[Result "1-0"]
[ECO "B33"]
[BlackElo "1613"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "99"]
[SourceVersionDate "2022.07.18"]

{[%mdl 8192] B33: Sicilian: Pelikan and Sveshnikov Variations} 1. e4 c5 2. Nf3
Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Nf3 Bb4 7. Bd3 Bxc3+ 8. bxc3 d5 $146 (
8... O-O 9. Bg5 h6 10. Bh4 Qa5 11. Bxf6 Qxc3+ 12. Nd2 gxf6 13. O-O Kh7 14. f4
d6 15. f5 Rg8 16. Bc4 Rg7 17. Rb1 Nd4 18. Bd3 b6 19. Nc4 d5 20. Nd6 Qc5 21. Ne8
Rg5 22. Nxf6+ Kh8 23. Kh1 {Bense,J (2220)-Marosi,C (2295) Kecskemet 1990 1-0 
(39)}) 9. Qe2 (9. exd5 Qxd5 10. O-O O-O $11) 9... h6 {Controls g5} (9... dxe4
10. Bxe4 Nxe4 11. Qxe4 $17) 10. Nd2 (10. O-O O-O $11) 10... d4 {Black
threatens to win material: d4xc3} (10... O-O 11. O-O $15) 11. Bb2 $11 Qa5 $4 {
throwing away the advantage} (11... O-O $142 $5 $11 {is worth consideration})
12. Nb3 (12. Nc4 $5 Qa4 13. cxd4 Nxd4 14. Bxd4 exd4 15. O-O $16) 12... Qb6 13.
Bb5 (13. cxd4 Nxd4 14. Bxd4 exd4 $16) 13... Nxe4 (13... dxc3 $5 {should not be
overlooked} 14. Bxc3 O-O $11) 14. cxd4 $14 O-O 15. Bd3 (15. Bxc6 $142 $5 {
is the best option White has} Qxc6 16. dxe5 $14) 15... Qb4+ $15 16. c3 $2 (16.
Kf1 $142 {would keep White in the game} Nc3 17. a3 Qxb3 18. cxb3 Nxe2 19. Kxe2
Nxd4+ 20. Bxd4 exd4 21. Rhe1 $15) 16... Nxc3 $19 17. Qd2 (17. Bxc3 Qxc3+ 18.
Qd2 Qxd2+ 19. Kxd2 Rd8 $19) 17... exd4 18. Nxd4 Re8+ (18... Nxd4 $6 19. Bxc3
Qe7+ 20. Qe3 Qxe3+ 21. fxe3 $17) 19. Kf1 Nxa2 (19... Qxd4 $6 20. Qxc3 Rd8 21.
Be4 $17) (19... Nxd4 {is the weaker alternative} 20. Bxc3 Qa4 21. Bxd4 $11) 20.
Qxb4 Naxb4 ({Worse is} 20... Ncxb4 21. Bc4 $14) 21. Bb5 Bd7 22. Ba3 (22. Nxc6
Bxc6 23. Bxc6 Nxc6 $19) 22... Nd5 (22... Rad8 $142 $5 {seems even better} 23.
Bxc6 Nxc6 24. Nxc6 Bxc6 25. h4 $19) 23. Nxc6 Bxc6 (23... Nc3 24. Ba4 bxc6 25.
Bd1 $19) 24. Bxc6 bxc6 25. g3 Re4 26. Bc5 (26. Kg2 $142 $19) 26... Nc7 $4 {
letting the wind out of his own sails} (26... a5 $142 $19 {Black had this
great chance}) 27. Rxa7 $17 Rxa7 28. Bxa7 Rc4 29. Ke2 c5 30. Ra1 Kf8 (30...
Rc2+ 31. Ke3 $17) 31. Ra5 $15 {[%cal Ra5c5,Ra7c5,Gc4c5] The isolani on c5
becomes a target} Ne6 32. Kd3 Rc1 33. Kd2 Rh1 34. h4 Nd4 $4 {Black has let it
slip away. The knight dominates} (34... Rf1 35. Ke2 Rc1 36. Kd2 $11) 35. Kd3 (
35. Bxc5+ $142 {and White takes home the point} Kg8 36. Bxd4 $18) 35... Rd1+
$11 36. Kc4 {White threatens to win material: Kc4xc5} Rc1+ 37. Kd5 {[%cal
Ra5c5,Ra7c5,Rd5c5,Gc1c5] Increasing the pressure on the isolated pawn on c5}
Nb3 {Black threatens to win material: Nb3xa5} 38. Rb5 c4 39. Be3 Rc2 40. Rb4 {
[%cal Rb4c4,Rd5c4,Gc2c4] Attacking the isolated pawn on c4} Nd2 41. Bc5+ (41.
Rb8+ Ke7 $11) 41... Kg8 42. Rb8+ Kh7 43. Rb7 Kg6 44. Rb6+ Kf5 (44... f6 45. Be3
$15) 45. Bd4 {White threatens to win material: Bd4xg7} (45. Rb7 Kg6 $11) 45...
Ne4 (45... f6 46. Rb7 $15) 46. Bxg7 $11 c3 $4 {with this move Black loses his
initiative} (46... Rxf2 $142 47. g4+ Kxg4 48. Kxe4 Kxh4 49. Rxh6+ Kg4 $11) 47.
Bxh6 $4 {weakening the position} (47. f3 $142 {White has the better game} Rd2+
48. Bd4 $18) 47... Rb2 {Black threatens to win material: Rb2xb6} (47... Rd2+
$142 48. Kc6 Rxf2 49. Rb5+ Kg4 $19) 48. Rc6 $11 Nxf2 (48... Rd2+ $5 {is
noteworthy} 49. Kc4 Rxf2 $11) 49. Rxc3 $14 Rd2+ $4 (49... Re2 $142 $14 {
was a good chance to save the game}) 50. Bxd2 $18 (50. Bxd2 Kg4 51. Rc7 $18)
1-0

[Event "SapporoSummer2002"]
[Site "?"]
[Date "2022.07.17"]
[Round "2.3"]
[White "Sugimoto, Koichi"]
[Black "Ishii, Hibiki"]
[Result "1-0"]
[ECO "E94"]
[WhiteElo "1941"]
[BlackElo "1349"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "83"]
[SourceVersionDate "2022.07.18"]

{[%mdl 8192] E94: King's Indian: Classical: 6 Be2 e5 7 0-0: Various Black 7th
moves} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O exd4
8. Nxd4 Nbd7 9. Be3 Qe7 $146 (9... Nc5 10. f3 a5 11. Qd2 c6 (11... Re8 12. Rad1
Bd7 13. Rfe1 a4 14. Bf1 Qb8 15. Ncb5 {1/2-1/2 (15) Gligoric,S (2510)-Ivanovic,
B (2480) Sarajevo 1983}) (11... Ne6 12. Ndb5 Ne8 13. Rad1 b6 14. f4 Bb7 15. Bf3
f5 16. Qc2 Qe7 17. Rde1 Qf6 18. e5 {1-0 (18) Csiszar,C (2340)-Tenyi,J (2200)
Hungary 1994}) (11... Bd7 12. Rad1 Qe8 13. Rfe1 Bc6 14. Bf1 Nfd7 15. Ncb5 Qc8
16. Bh6 Re8 17. Bxg7 Kxg7 18. Nc3 Qd8 19. b3 Qf6 20. Nc2 b6 21. Nd4 Bb7 22. Nd5
Qd8 23. a3 Nf6 24. Qg5 Nxd5 25. Qxd8 Rexd8 26. cxd5 {Robatsch,K (2440)-Ledic,T
(2345) Borovo 1980 1-0 (53)}) 12. Rfd1 Qe7 13. Rab1 Ne8 14. Bf1 Be6 15. b3 Nc7
16. a3 a4 17. b4 Nb3 18. Nxb3 axb3 19. a4 Rfd8 20. Rxb3 d5 21. cxd5 cxd5 22.
exd5 Nxd5 23. Nxd5 Rxd5 24. Rd3 {Schmidt,W (2505)-Todorcevic,M (2453) Vrnjacka
Banja 1978 1/2-1/2 (32)}) (9... c6 10. Nc2 Qe7 11. f3 Rd8 12. Qe1 d5 13. exd5
cxd5 14. cxd5 Nb6 15. d6 Qxd6 16. Nb5 Qe7 17. Qf2 Nfd5 18. Bc5 Qg5 19. Rad1 Be6
20. h4 Qf4 21. g3 Qa4 22. Ncd4 Rac8 23. a3 Bh3 24. b3 {Smith,A (2245)-Motwani,
P (2255) Manchester 1982 1-0 (41)}) 10. f3 {Black's piece can't move: c8} Ne5
11. Qd2 Be6 12. Nd5 Bxd5 13. cxd5 c5 14. dxc6 Nxc6 15. Rac1 Nxd4 16. Bxd4 ({Not
} 16. Qxd4 Ng4 17. Qd2 Nxe3 18. Qxe3 Bxb2 $15) 16... a6 17. Rfd1 Rac8 18. Bc3
Rfd8 19. Ba5 Re8 20. Rxc8 Rxc8 21. Qxd6 Qxd6 22. Rxd6 Rc1+ (22... Nh5 $5 $16)
23. Kf2 $18 Rc8 24. Rd8+ (24. g3 $5 Ne8 25. Rd2 Rc5 $18) 24... Rxd8 $16 25.
Bxd8 Nd7 26. b3 Bd4+ 27. Ke1 Kf8 28. Kd2 f6 29. Bc4 (29. Ba5 Ke7 $18) 29... Ke8
(29... Be5 $5 $16) 30. Bc7 Be5 (30... Ke7 31. Ba5 $18) 31. Bxe5 Nxe5 (31...
fxe5 32. Bd5 $18) 32. Bd5 b6 (32... g5 33. Bxb7 a5 34. Ke3 $18) 33. f4 Nd7 (
33... Ng4 {there is nothing better in the position} 34. h3 Nh6 $18) 34. Bc6 Ke7
35. Bxd7 Kxd7 36. Kd3 Kd6 37. Kd4 h5 (37... Ke6 $18 {the last chance for
counterplay}) 38. h4 a5 39. a4 Kc6 40. e5 fxe5+ 41. fxe5 Kd7 42. Kd5 (42. Kd5
Ke7 43. e6 $18) 1-0

[Event "SapporoSummer2022"]
[Site "?"]
[Date "2022.07.17"]
[Round "2.4"]
[White "Nishimori, Toshiyuki	"]
[Black "Fujii, Nathan"]
[Result "1-0"]
[ECO "B70"]
[WhiteElo "1684"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "55"]
[SourceVersionDate "2022.07.18"]

{B70: Sicilian Dragon: 6 g3 and 6 Be2 (without a later Be3)} 1. e4 c5 2. Ne2 d6
3. Nbc3 Nc6 4. g3 g6 5. Bg2 Bg7 6. O-O Nf6 7. d4 cxd4 8. Nxd4 O-O 9. Nce2 (9.
h3 Bd7 (9... Nxe4 10. Nxc6 Nxc3 11. Nxd8 Nxd1 12. Nxb7 Bxb7 13. Rxd1 Rab8 14.
c3 Rfc8 15. Bxb7 Rxb7 16. Rd5 Rc6 17. a4 a6 18. Ra2 e6 19. Rd3 a5 20. Bf4 d5
21. Be3 Rb3 22. Kf1 Rc7 23. Ke2 Rcb7 24. Rd2 {Hokkanen,P (2291)-Kononen,K 
(2222) Finland 2013 1-0 (47)}) 10. Be3 Rb8 11. a4 a6 12. Nb3 b5 13. axb5 axb5
14. Qd2 Ne5 15. Ba7 Ra8 16. Qe2 Qc8 17. Bd4 Rxa1 18. Rxa1 b4 19. Nd5 Nxd5 20.
exd5 Bxh3 21. f4 Bxg2 22. Kxg2 Ng4 23. Bxg7 Kxg7 {Karabalis,H (2265)-Van Wely,
L (2651) Kuppenheim 2004 0-1 (59)}) 9... Bd7 $146 (9... d5 10. exd5 Nxd5 11.
Nxc6 bxc6 12. Nd4 Bd7 13. c4 Nb4 14. a3 e5 15. Nb3 Na6 16. Be3 Qe7 17. Na5 Rfc8
18. b4 Rc7 19. b5 Nb8 20. c5 Be8 21. Qd6 e4 22. Rad1 Bc3 23. Bd2 Bxd2 24. Rxd2
{Neulinger,M (2299)-Wukits,R (2320) Oberwart 2000 1-0}) 10. c3 {Secures b4+d4}
Qc8 11. Bd2 Bh3 12. Bxh3 Qxh3 {White king safety dropped} 13. Nf4 {White
threatens to win material: Nf4xh3} Qd7 {White king safety improved} 14. Nf3 (
14. Nxc6 $5 {is worthy of consideration} Qxc6 15. f3 $15) 14... Nxe4 $17 15.
Be3 Nf6 16. Qc2 (16. Re1 Qf5 $17) 16... Ng4 (16... e5 $5 17. Ng2 d5 $19) 17.
Rad1 $17 Nxe3 18. fxe3 Ne5 19. Nxe5 Bxe5 20. Nd3 Bg7 21. e4 Rad8 22. Qb3 Qc6
23. Nf2 Bh6 24. Ng4 Bg5 (24... Qc5+ 25. Kg2 Bg7 26. Rd2 $17 (26. Qxb7 $2 {
is nothing because of} Qg5 27. Nf2 Rb8 28. Qxa7 Rxb2 $19)) 25. Rd5 $15 Bf6 (
25... e5 $5 $15 {might be a viable alternative}) 26. Nxf6+ $14 exf6 27. Rxf6
Kg7 28. Rf1 1-0

[Event "SapporoSummer2022"]
[Site "?"]
[Date "2022.07.17"]
[Round "2.5"]
[White "Nakamura, Mitsuru	"]
[Black "Takeuchi, Hiroshi"]
[Result "0-1"]
[ECO "E97"]
[WhiteElo "1355"]
[BlackElo "1393"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "82"]
[SourceVersionDate "2022.07.18"]

{[%mdl 8256] E97: King's Indian: Classical Main Line (6...e5 7 0-0 Nc6): 8 Be3
and 8 d5 Ne7, not 9 Ne1} 1. d4 Nf6 2. c4 d6 3. Nc3 g6 4. e4 Bg7 5. Nf3 O-O 6.
Be2 e5 7. O-O Nc6 8. d5 Ne7 9. h3 Nd7 {Black has a cramped position. Black's
piece can't move: c8} (9... Ne8 10. Bg5 f6 11. Bh4 Kh8 12. Qd2 Ng8 13. b4 Qe7
14. Rab1 h5 15. Bg3 Bh6 16. Qd3 Ng7 17. Bh4 g5 18. Bg3 f5 19. c5 f4 20. Bh2 g4
21. hxg4 hxg4 22. Nd2 Nh5 23. cxd6 cxd6 24. g3 {WoDra (2534)-McShane (2381)
playchess.com INT 2006 0-1 (35)}) (9... a5 10. Be3 Ne8 11. Qd2 f5 12. exf5 gxf5
13. Bh6 f4 14. Bxg7 Nxg7 15. Bd3 Nef5 16. Rfe1 Nh5 17. a3 Bd7 18. b4 Qe7 19.
Nb5 Be8 20. Bxf5 Rxf5 21. bxa5 Qg7 22. Kh1 Nf6 23. Rg1 Rh5 24. Kh2 {Da Silva,H
(2219)-Violla Cunha,M (2322) Rio de Janeiro 2015 0-1 (31)}) 10. Ne1 $146 (10.
Be3 f5 11. exf5 gxf5 12. Ng5 Nf6 13. f4 Bh6 14. Qd2 exf4 15. Bxf4 Ng6 16. g3
Nxf4 17. gxf4 Ne4 18. Ncxe4 fxe4 19. Qe3 Qf6 20. Bg4 Bxg4 21. hxg4 Bxg5 22.
fxg5 Qxb2 23. Qxe4 Rae8 24. Rxf8+ Rxf8 {Grachev,B (2483)-Gubajdullin,A (2344)
Samara 2003 1/2-1/2 (41)}) (10. Be3 a5 $14) 10... f5 $14 {Attacks the pawn
chain} 11. f3 Nf6 {[%cal Yh5g3,Yf6h5,Yd7f6] Begins the manoeuvre Nd7-f6-h5-g3}
12. Nd3 Bd7 13. b4 {[%cal Yc4c5] White prepares the advance c5} (13. Qb3 b6 $14
) 13... f4 {Black wins space} (13... Nh5 14. Qe1 $11) 14. c5 $14 {The thematic
attack} Nh5 15. Qb3 Kh8 16. Bd2 Ng3 {Black threatens to win material: Ng3xf1.
The black knight on an outpost} 17. Rfc1 Ng8 18. b5 (18. Rab1 Re8 $11) 18...
Qh4 (18... Qg5 19. Bf1 Bxh3 20. Nf2 $15 (20. gxh3 $4 Ne2+ 21. Kf2 Nd4 $19)) 19.
Nf2 (19. c6 $142 $5 {is interesting} bxc6 20. bxc6 $14) 19... dxc5 $15 20. Qc4
(20. a4 Nf6 $15) 20... b6 21. a4 Qe7 (21... Nxe2+ 22. Qxe2 Nf6 23. a5 $17) 22.
Bd3 $15 g5 (22... Nh6 23. a5 $15) 23. Be2 (23. a5 $5 $11) 23... h5 24. a5 Nh6
25. axb6 (25. Ra2 {[%tqu "En","","","","g5g4","",10]} g4 $1 {Black moves ahead
of the opponent} 26. fxg4 hxg4 27. Bxg4 Nxg4 28. Nxg4 Bxg4 29. axb6 f3 $19)
25... cxb6 {White has a new protected passed pawn: d5} (25... axb6 26. Ra6
Nxe2+ 27. Qxe2 Nf7 $17) 26. Ncd1 $2 (26. Ra2 $142 $5 $15 {is a viable option})
26... g4 27. Qd3 $2 (27. hxg4 $142 hxg4 28. fxg4 $17) 27... gxh3 $19 28. Nxh3
Bxh3 (28... Nxe2+ $6 29. Qxe2 Bf6 30. Kh1 $17) 29. gxh3 Qg5 30. Kh2 Rf6 (30...
Nxe2 $142 {seems even better} 31. Qxe2 Qg3+ 32. Kh1 Qxh3+ 33. Qh2 Qxf3+ 34. Qg2
Qg4 $19) 31. Bf1 $4 {sad, but how else could White save the game?} (31. Nf2
$142 $17) 31... Rg6 $19 32. Be1 (32. Bg2 {doesn't get the bull off the ice} {
[%tqu "En","","","","g3e4","",10]} Nxe4 $1 {Clearance: g3} 33. Qe2 Nxd2 34. Ra3
$19) 32... Ne2 (32... Nh1 $1 33. Qd4 exd4 34. h4 Qg1+ 35. Kh3 Qxf1+ 36. Kh2
Qg2#) 33. Bf2 $19 Nxc1 34. Rxc1 Qe7 35. Nc3 (35. Rc2 Rg8 36. Be1 Nf7 $19) 35...
Bf6 36. d6 (36. Bg2 {doesn't get the cat off the tree} Rag8 37. Rg1 Bh4 $19)
36... Qd7 (36... Qg7 37. h4 Rg8 38. Bh3 Rg2+ 39. Kh1 Rxf2 40. Ne2 $19) 37. Qd5
(37. Kh1 $19 {the only chance to get some counterplay}) 37... Rag8 38. Rd1 (38.
Kh1 {a fruitless try to alter the course of the game} Qg7 39. Bc4 Rg2 40. Qxg8+
Nxg8 $19) 38... Qg7 39. Ne2 (39. Qxg8+ {otherwise it's curtains at once} Qxg8
40. Nd5 $19) {[%tqu "En","","","","g6g2","",10]} 39... Rg2+ $1 {Clearance: g6}
40. Kh1 (40. Bxg2 Qxg2# {Mate attack Clearance}) 40... Rxf2 41. Qe6 {[%tqu
"En","","","","f2f1","",10]} Rxf1+ $1 {Mate attack} (41... Rxf1+ 42. Rxf1 Qg2#)
0-1

[Event "SapporoSummer2022"]
[Site "?"]
[Date "2022.07.17"]
[Round "3.1"]
[White "Misawa, Hideki"]
[Black "Aoki, Yasuhiro"]
[Result "0-1"]
[ECO "B07"]
[BlackElo "1566"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "104"]
[SourceVersionDate "2022.07.18"]

{[%mdl 8192] B07: Pirc Defence: Miscellaneous Systems} 1. e4 d6 2. d4 Nf6 3.
Bd3 e5 4. c3 d5 5. dxe5 Nxe4 6. Bxe4 dxe4 7. Qxd8+ Kxd8 8. Ne2 (8. Bg5+ Be7 9.
Bxe7+ Kxe7 10. Nd2 Nc6 11. Nxe4 Nxe5 12. Rd1 (12. O-O-O Bf5 13. Nf3 Nxf3 14.
gxf3 Rhd8 15. b3 Rxd1+ 16. Rxd1 b6 17. Ng3 Be6 18. Ne2 a5 19. Nd4 a4 20. Kb2
Bd7 21. b4 a3+ 22. Kc1 c5 23. Nc2 Be6 24. Kb1 cxb4 25. Nxb4 Rc8 26. Kc2 Rc5 {
Ruiz Marana,A (2210)-Guerra Bastida,D (2397) Don Benito 2012 0-1 (73)}) 12...
Be6 13. f4 Ng6 14. Ne2 Rhd8 15. Rd4 Bxa2 16. O-O Rxd4 17. Nxd4 Bc4 18. Rf2 Kf8
19. f5 Re8 20. fxg6 Rxe4 21. Rd2 hxg6 22. Kf2 a6 {Rabiega,R (2531)-Bacrot,E 
(2709) Germany 2010 0-1}) 8... Nc6 9. Bf4 Bc5 $146 (9... h6 10. Nd2 g5 11. Bg3
Bg7 12. O-O-O Ke7 13. Nxe4 Be6 14. Nc5 Bxe5 15. Bxe5 Nxe5 16. Nd4 b6 17. Ndxe6
fxe6 18. Rhe1 Kf6 19. Ne4+ Ke7 20. Nxg5 hxg5 21. Rxe5 Kf6 22. Rde1 Rae8 23. h3
a5 24. R5e4 {Rausis,I (2505)-Chomet,P (2331) Dieppe 2010 1-0 (35)}) (9... Be7
10. Nd2 g5 11. Bg3 Bf5 12. O-O-O Kc8 13. Nb3 Bg6 14. Ned4 Nxd4 15. Nxd4 b6 16.
Nc6 Bc5 17. b4 Kb7 18. bxc5 Kxc6 19. cxb6 axb6 20. Kb2 Ra5 21. Rd4 Rha8 22. Ra1
b5 23. a3 Bf5 24. h4 {Smirnov,V (2231)-Reilly,T (2235) Canberra 2002 1/2-1/2 
(54)}) (9... Be7 $5 $11 {must definitely be considered}) 10. Nd2 $16 Bf5 11.
O-O-O {Black king safety dropped} (11. Ng3 $5 Be6 12. O-O-O $16) 11... Kc8 $14
{Black king safety improved} (11... Bxf2 $4 {the pawn is something Black will
choke on} 12. Nxe4+ Ke7 13. Nxf2 $18) 12. Ng3 {White threatens to win material:
Ng3xf5. White forks: e4+f5} Bg6 (12... Bg4 13. Rdf1 $14 (13. Ngxe4 $143 Bxd1
14. Rxd1 Be7 $15)) 13. Ngxe4 Be7 14. Rhe1 b6 {Covers c5} 15. Ng5 h6 16. Ngf3
Kb7 17. Nb3 Bh5 18. Nbd4 Bc5 (18... Nxd4 19. Rxd4 (19. Nxd4 $143 Bxd1 20. Kxd1
Rad8 $17) (19. cxd4 $6 g5 20. Bg3 c6 $11) 19... Rad8 20. h3 $14) 19. Nxc6 $16
Bxf3 20. gxf3 Kxc6 21. Bg3 Rhe8 22. Re4 Re6 (22... b5 23. Kc2 $16) 23. b4 Be7
24. f4 g6 25. a4 a5 (25... Kb7 26. Kc2 $16) 26. Rc4+ Kb7 27. Rd7 Rc8 28. bxa5
bxa5 29. f3 Ba3+ (29... Kb6 $5 $16) 30. Kc2 $18 f6 (30... Re7 31. Rd1 Re6 32.
Rd5 $18) 31. Rf7 (31. f5 {and White can already relax} gxf5 32. exf6 Rxf6 33.
Bxc7 Ka6 $18) 31... Be7 (31... fxe5 32. fxe5 h5 33. Kd3 $18) 32. Bh4 (32. exf6
Bxf6 33. Rc5 Be7 34. Rb5+ Kc6 35. Rxa5 Rg8 $18) 32... g5 33. exf6 (33. f5 Rxe5
34. Bg3 Rc5 35. Rxc5 Bxc5 $18) 33... Bxf6 34. fxg5 hxg5 35. Bg3 Be5 (35... Bd8
$18) 36. Rf5 Bxg3 37. hxg3 Re2+ 38. Kd3 Re1 (38... Rf2 39. Ke3 Rf1 40. Rxg5
Re8+ 41. Re4 $18) 39. Rxg5 Rd8+ 40. Kc2 Re2+ (40... Rdd1 {is no salvation} 41.
Rb5+ Kc8 42. Re4 $18) 41. Kb3 Rdd2 (41... Rd1 {doesn't do any good} 42. Rb5+
Kc8 $18) 42. Rxa5 {Sacrifices material} (42. Rb5+ $142 {and White has it in
the bag} Kc8 43. Rf4 $18) 42... Rb2+ $11 43. Ka3 Ra2+ 44. Kb4 Rab2+ 45. Kc5 $4
{a transit from better to worse} (45. Ka3 $142 {this is the best bet to save
the position} Ra2+ 46. Kb4 Rab2+ 47. Ka3 $11) 45... Re5+ $19 46. Kd4 Rxa5 47.
Rb4+ (47. Kd3 $19 {a last effort to resist the inevitable}) 47... Rxb4+ 48.
cxb4 Rxa4 49. f4 (49. g4 {cannot change what is in store for White} Rxb4+ 50.
Ke5 c5 $19) 49... Rxb4+ 50. Ke5 (50. Ke3 {does not solve anything} Kc6 $19)
50... Rb5+ (50... c5 {keeps an even firmer grip} 51. f5 $19) 51. Ke6 Rb6+ 52.
Ke7 (52. Kf5 $19 {is still a small chance}) 52... Rg6 (52... Rg6 53. f5 Rg7+
54. Ke6 Rxg3 $19) 0-1

[Event "SapporoSummer2002"]
[Site "?"]
[Date "2022.07.17"]
[Round "3.2"]
[White "Yoshii, Yukihiko"]
[Black "Sugimoto, Koichi"]
[Result "0-1"]
[ECO "D15"]
[WhiteElo "1941"]
[BlackElo "1686"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "138"]
[SourceVersionDate "2022.07.18"]

{[%mdl 8192] D15: Slav Defence: 4 Nc3 a6 and gambit lines after 4 Nc3 dxc4} 1.
c4 c6 2. d4 d5 3. cxd5 cxd5 4. Nc3 Nf6 5. Nf3 Nc6 6. e3 a6 7. Be2 Bf5 8. a3 e6
9. O-O Bd6 10. h3 O-O $146 (10... Ne4 11. Nxe4 Bxe4 12. Bd2 O-O 13. Bc3 f6 14.
Nd2 Bg6 15. f4 Qe7 16. Nf3 Rad8 17. Bd3 Be4 18. Qc2 f5 19. Rf2 h6 20. Raf1 Rf7
21. g3 Rdf8 22. Nd2 g5 23. Kh2 h5 24. Rg1 Rg7 25. Nf3 {Thomsen,T (2215)
-Jelling,E (2400) Gausdal 1992 0-1 (43)}) 11. b4 Rc8 12. Bb2 Bb8 13. Rc1 b5 (
13... Ne4 14. Na4 $11) 14. Bd3 (14. a4 Nxb4 15. axb5 a5 $11) 14... Bg6 15. Bxg6
hxg6 16. Qd3 Re8 17. Rfd1 Qd6 18. e4 Qf4 (18... dxe4 19. Nxe4 Nxe4 20. Qxe4 $11
) 19. e5 {This push gains space} Ne4 (19... Nd7 20. Ne2 Qf5 21. Qb3 $14) 20.
Ne2 {White threatens to win material: Ne2xf4} Qh6 21. Rc2 Ne7 22. Rdc1 Rcd8 (
22... Rc4 23. Nc3 Qf4 24. g3 Nxg3 25. fxg3 Qxg3+ 26. Rg2 Qxh3 27. Ne2 $11) 23.
Rd1 {Black has a cramped position} Qh5 (23... Rc8 24. Nc3 Nxc3 25. Bxc3 $14)
24. Nf4 {White threatens to win material: Nf4xh5} (24. a4 $5 $16) 24... Qh7 25.
Bc1 {Black has a cramped position} (25. Qe2 Rc8 $14) 25... g5 {Black threatens
to win material: g5xf4} 26. Ne2 f6 27. Nh2 fxe5 28. f3 {White threatens to win
material: f3xe4} (28. Ng4 exd4 29. Nxd4 Rc8 30. Nxe6 Rxc2 31. Qxc2 Rc8 $11)
28... Nf6 29. dxe5 Qxd3 {Black forks: c2+d1} 30. Rxd3 Bxe5 31. Bxg5 Rc8 {
Black threatens to win material: Rc8xc2} 32. Rdd2 Bd6 33. g4 Kf7 34. f4 $2 (34.
Nf1 $142 $5 $15 {and White can hope to survive}) 34... Ne4 $19 35. Rxc8 Nxc8 (
35... Rxc8 36. Rb2 $17) 36. Rc2 Nxg5 37. fxg5 Ne7 38. Nf3 Bb8 (38... e5 39. Kg2
$17) 39. Kg2 e5 40. h4 d4 {This push gains space} (40... g6 $5 $17) 41. Ng3 $11
Nd5 42. Rc6 {White threatens to win material: Rc6xa6} Ne3+ {Black forks: g4. A
classical outpost} 43. Kh3 Re6 (43... d3 44. Ne4 $11 (44. Rxa6 e4 45. g6+ Kf8
46. Nxe4 Rxe4 $19)) 44. Rxe6 (44. g6+ $5 Ke7 45. Rxe6+ Kxe6 46. h5 $16) 44...
Kxe6 $11 {A minor pieces endgame occured} 45. Ne4 {The knight feels good on e4}
Ba7 (45... Kd5 46. Nc5 e4 47. Nd2 $11) 46. g6 (46. h5 $142 d3 47. h6 $16) 46...
Nc4 $4 {ruins a clearly superior position. An ideal square for the black
knight.} (46... d3 $142 $11 {is just about the only chance}) 47. h5 d3 (47...
Nxa3 48. g5 Bc5 49. h6 $18) 48. g5 (48. Nfg5+ $142 {and the result of the game
is clear: White will win} Kd5 49. h6 gxh6 50. g7 hxg5 51. Nxg5 $18) 48... Be3 (
48... Nxa3 49. h6 Kf5 50. hxg7 Kxe4 51. g8=Q $18) 49. Kg4 $4 {lets it slip away
} (49. h6 $142 {and White has triumphed} gxh6 50. Nf6 Bxg5 51. g7 Kxf6 52. g8=Q
$18) 49... d2 $19 (49... Nxa3 $4 {taking the pawn will bring Black grief} {
[%tqu "En","","","","h5h6","",10]} 50. h6 gxh6 51. Nf6 hxg5 52. g7 Kxf6 53.
g8=Q $18) 50. Nfxd2 Nxd2 $4 {ruins a very nice position} (50... Bxd2 $142 {
a shame that Black overlooked this excellent chance} 51. Nc5+ Ke7 52. Nxa6 Nxa3
$19) 51. Nc5+ (51. h6 $142 {and White can celebrate victory} gxh6 52. Nd6 hxg5
53. g7 $18) 51... Ke7 $15 52. Kf5 $4 (52. Nxa6 $5 {has some apparent merit} Nb1
53. Nb8 $15) 52... Nc4 (52... e4 {makes it even easier for Black} 53. Nd7 Nc4
54. Kxe4 Bxg5 55. Nc5 $19) 53. Ne6 $2 (53. Nxa6 $142 Bf4 54. Kg4 Ne3+ 55. Kh4
$17) 53... Nd6+ (53... e4 $142 $19 {secures the point}) 54. Kxe5 $11 Ne8 55.
Nxg7 $4 {White lets it slip away} (55. Nf4 Bxf4+ 56. Kxf4 Nd6 $11) 55... Bxg5 {
Sacrifices material} (55... Nxg7 $142 {finishes off the opponent} 56. h6 Ne8
$19) 56. Nf5+ $11 Kf8 57. h6 {He broke from his leash} Bf6+ 58. Ke6 Bb2 59. h7
Ng7+ 60. Nxg7 {White has a mate threat} Kxg7 61. Kf5 $4 {makes life more
difficult} (61. h8=Q+ $142 {would hold out} Kxh8 62. Kf7 $11) 61... Bxa3 $19
62. Ke4 Bxb4 63. Kd3 Bc5 64. Kc3 a5 65. Kb3 a4+ 66. Kb2 a3+ 67. Kb3 b4 68. Ka2
Bd4 69. Kb3 Kxg6 0-1

[Event "SapporoSummer2022"]
[Site "?"]
[Date "2022.07.17"]
[Round "3.3"]
[White "Takeuchi, Hiroshi"]
[Black "Nishimori, Toshiyuki	"]
[Result "1-0"]
[ECO "D02"]
[WhiteElo "1393"]
[BlackElo "1684"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "81"]
[SourceVersionDate "2022.07.18"]

{[%mdl 8256] D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6
3 Bf4} 1. d4 Nf6 2. Bf4 d5 3. e3 e6 4. Nf3 Bb4+ $146 (4... b6 5. Bd3 (5. Nbd2
Bd6 6. Ne5 O-O 7. c3 Ba6 8. Bxa6 Nxa6 9. Qe2 Nb8 10. O-O Re8 11. e4 dxe4 12.
Nxe4 Nd5 13. Bd2 f6 14. Nf3 Nc6 15. Qb5 Nce7 16. c4 Nf4 17. Rad1 c6 18. Qb3 Bc7
19. Rfe1 Qd7 {Knezevic,M (2465)-Drasko,M (2325) Zagreb 1982 1-0 (36)}) (5. c3
Bb7 6. Bb5+ Nfd7 7. Nbd2 Bd6 8. Bxd6 cxd6 9. O-O O-O 10. Bd3 f5 11. c4 Nf6 12.
Rc1 Nbd7 13. Qe2 Ne4 14. cxd5 Bxd5 15. Bc4 Ndf6 16. Bxd5 Nxd5 17. Nxe4 fxe4 18.
Nd2 Nf6 19. h3 Qd7 {Gogolis,A (2283)-Delithanasis,D (2189) Athens 2008 1/2-1/2}
) (5. c4 Bb7 6. Nbd2 Be7 7. Be2 O-O 8. h3 c5 9. cxd5 exd5 10. dxc5 bxc5 11. O-O
Qb6 12. Qb3 Nc6 13. Rfd1 Rac8 14. Ne5 Ba8 15. Qxb6 axb6 16. Bb5 Nxe5 17. Bxe5
Bb7 18. b3 Rfd8 19. f3 Kf8 {Botta,W (2200)-Rother,C (2200) Boeblingen 1985 0-1
(56)}) 5... Bb7 6. Nbd2 Nbd7 7. O-O Be7 8. Ne5 O-O 9. Nxd7 Qxd7 10. Be5 c5 11.
c3 Ne8 12. Qh5 g6 13. Qe2 c4 14. Bc2 f6 15. Bg3 f5 16. Nf3 Bd8 17. Ne5 Qg7 18.
f3 Bc7 19. e4 {Mason,J-Lipschuetz,S New York 1889 1/2-1/2 (62)}) 5. c3 {
White threatens to win material: c3xb4} Be7 6. Bd3 h6 {Prevents intrusion on g5
} 7. h3 {Secures g4} Nbd7 8. O-O c5 9. Nbd2 c4 {Black threatens to win
material: c4xd3} 10. Bc2 Nh5 11. Bh2 O-O 12. Ne5 g6 13. f4 (13. Ndf3 $142 $5
$16) 13... Nxe5 $11 14. dxe5 {White has new doubled pawns: e3+e5} (14. fxe5 Qb6
15. Qc1 Bd7 $14) 14... Ng7 (14... Qb6 15. g4 Ng7 16. Nf3 $15) 15. Nf3 $11 b5 (
15... Qb6 16. Qc1 $11) 16. Qe2 Qb6 {[%cal Yb5b4] Black prepares b4} 17. Nd4 Bc5
(17... Nf5 18. Bxf5 exf5 19. Bg3 $11) 18. g4 $14 Bxd4 (18... b4 19. Bg3 $14)
19. cxd4 (19. exd4 b4 $16) 19... b4 $11 20. Kh1 Ba6 21. Qg2 (21. Rfb1 Rab8 $11)
21... c3 {Black threatens to win material: c3xb2} (21... b3 22. Bd1 c3 23. Bxb3
Bxf1 24. Rxf1 cxb2 25. Rb1 $17) 22. Rf2 (22. Rfb1 Rfc8 $14) 22... cxb2 23. Rb1
{White threatens to win material: Rb1xb2} Bc4 {Black threatens to win material:
Bc4xa2. A beautiful square!} (23... Rfc8 24. Rxb2 Rxc2 25. Rfxc2 $11) 24. Rxb2
a5 (24... Kh8 $5 $11 {should be investigated more closely}) 25. f5 $16 exf5 (
25... a4 $142 $5 26. fxg6 a3 27. gxf7+ Rxf7 28. Rxf7 Kxf7 $16) 26. gxf5 $18 a4
(26... gxf5 27. Bxf5 Rae8 28. Rb1 $18) 27. f6 Ne6 $6 {instead of fighting back}
(27... b3 28. fxg7 Rfe8 29. Qf3 $18) {[%tqu "En","","","","c2g6","",10]} 28.
Bxg6 $1 {Mate attack.} Ng5 (28... fxg6 29. Qxg6+ {Mate attack}) 29. Bf5 Kh8 30.
h4 Rg8 31. hxg5 Rxg5 32. Qh3 h5 33. Bf4 Rxf5 (33... Bf1 {does not save the day}
34. Rxf1 Rag8 35. Rh2 R8g7 36. fxg7+ Kxg7 37. Bxg5 h4 38. Qxh4 Qb8 39. Qh7+ Kf8
40. Qh8#) 34. Qxf5 Bd3 35. Qxd3 (35. Qxh5+ Kg8 36. Rg2+ Bg6 37. Rxg6+ fxg6 38.
Qxg6+ Kf8 39. Bh6#) 35... Qe6 (35... Qc7 {does not help much} 36. Qd1 Qc1 37.
Qxc1 Kh7 38. Qd1 Re8 39. Qxh5+ Kg8 40. Rg2+ Kf8 41. Bh6#) 36. Rh2 Qg4 37. Rbg2
Rg8 (37... Qf3 {cannot change destiny} 38. e4 Rc8 39. Qxf3 Rc1+ 40. Bxc1 dxe4
41. Rxh5#) 38. Rxg4 Rxg4 39. Rxh5+ Kg8 40. Rg5+ (40. Qc2 Rh4+ 41. Rxh4 Kf8 42.
Rh8#) 40... Rxg5 41. Bxg5 (41. Bxg5 a3 42. e6 fxe6 43. Qg6+ Kf8 44. Bh6#) 1-0

[Event "SapporoSummer2022"]
[Site "?"]
[Date "2022.07.17"]
[Round "3.4"]
[White "Ogawa, Taishi"]
[Black "Ishii, Hibiki"]
[Result "0-1"]
[ECO "A48"]
[WhiteElo "1613"]
[BlackElo "1349"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "62"]
[SourceVersionDate "2022.07.18"]

{[%mdl 8192] A48: 1 d4 Nf6 2 Nf3 g6: Torre, London and Colle Systems} 1. d4 Nf6
2. Bf4 g6 3. e3 Bg7 4. Nf3 d6 5. h3 O-O 6. Bd3 c5 7. c4 $146 (7. c3 Nc6 (7...
b6 8. O-O Bb7 9. Bh2 Nbd7 10. Nbd2 Re8 11. Re1 e5 12. dxe5 Nxe5 13. Bb5 Re7 14.
Nxe5 {1/2-1/2 (14) Lechtynsky,J (2450)-Georgiev,K (2440) Albena 1985}) 8. O-O
cxd4 9. exd4 Qb6 10. Nbd2 Be6 11. Nc4 Bxc4 12. Bxc4 Qxb2 13. Qb3 Qxb3 14. axb3
d5 15. Bd3 a6 16. b4 Rfc8 17. Rfb1 Na7 18. b5 Nxb5 19. Bxb5 axb5 20. Rxa8 Rxa8
21. Rxb5 Ne4 {Duboue,P (2312)-Barbot,P (2461) Saint-Quentin 2015 1/2-1/2 (42)})
(7. Nc3 Nc6 8. O-O a6 9. a4 Nb4 10. Be2 Bf5 11. Ne1 cxd4 12. exd4 Rc8 13. Bf3
Qc7 14. Qd2 e5 15. Be3 Nc6 16. d5 Nd4 17. Bxd4 exd4 18. Ne2 Ne4 19. Qd1 Ng5 20.
Nxd4 Nxf3+ 21. Nexf3 Bxc2 {Repka,C (2337)-Petenyi,T (2452) Martin 2013 0-1}) (
7. Nc3 $142 $5 $11 {has some apparent merit}) 7... cxd4 $17 8. exd4 (8. Nxd4 $4
e5 9. Ne2 exf4 10. exf4 d5 $19) 8... Nh5 (8... e5 9. Bg5 e4 10. Bxf6 Qxf6 11.
Bxe4 $17) 9. Bh2 (9. Be3 e5 10. Nc3 exd4 11. Nxd4 Nc6 $14) 9... Qb6 {Black
threatens to win material: Qb6xb2} (9... Nc6 10. O-O $17) 10. Qb3 (10. Nc3 $5
$11 {is an interesting alternative}) 10... Bxd4 (10... Nc6 11. Nc3 $17) 11.
Nxd4 $15 Qxd4 {White has the pair of bishops} 12. O-O {White castles and
improves king safety} Nc6 13. Rd1 Qc5 14. Nc3 Be6 (14... Nd4 15. Qa3 Qxa3 16.
bxa3 $11) 15. Ne4 {White threatens to win material: Ne4xc5} Qb4 16. Be2 Qxb3
17. axb3 {White has new doubled pawns: b2+b3} Ng7 18. g4 f5 {Black threatens
to win material: f5xe4} 19. Ng5 (19. Nc3 fxg4 20. hxg4 h5 $15) 19... fxg4 (
19... a5 20. Re1 fxg4 21. Bd1 $17) 20. Nxe6 (20. hxg4 $5 {looks like a viable
alternative} h6 21. Ne4 $15) 20... Nxe6 $17 21. Bxg4 Ned4 22. c5 (22. Rd3 $142
$5 $17) 22... dxc5 $19 23. Rac1 $2 (23. Rd3 $19) 23... h5 24. Bd7 Ne2+ 25. Kf1
(25. Kg2 {doesn't change the outcome of the game} Nxc1 26. Rxc1 Rf6 27. Rxc5
Rd8 $19) 25... Nxc1 26. Rxc1 Nd4 (26... Rad8 $5 {might be the shorter path} 27.
Bxc6 Rd2 28. Bg3 bxc6 29. Rxc5 $19) 27. Rxc5 Nxb3 $4 {instead of simply
winning the game.} (27... b6 $142 {and Black takes home the point} 28. Rd5 Nxb3
$19) 28. Be6+ $14 {White forks: b3} Kh7 29. Bxb3 Rf3 {Black threatens to win
material: Rf3xb3. Black forks: b3+h3} 30. Be6 Raf8 31. Bg3 $4 {stumbles just
before the finish line} (31. Rc2 $142 $14 {the rescuing straw}) 31... Rxg3 $19
0-1

[Event "SapporoSummer2022"]
[Site "?"]
[Date "2022.07.17"]
[Round "3.5"]
[White "Ito, Katsuhide"]
[Black "Nakamura, Mitsuru"]
[Result "0-1"]
[ECO "C99"]
[WhiteElo "1296"]
[BlackElo "1355"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "80"]
[SourceVersionDate "2022.07.18"]

{[%mdl 8192] C99: Closed Ruy Lopez: Chigorin Defence: 11 d4 Qc7 12 Nbd2 cxd4} 
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 b5 5. Bb3 Nf6 6. O-O Be7 7. Re1 O-O 8. c3
d6 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 cxd4 13. cxd4 Nc6 14. Nf1 h6 $146 {
Controls g5} (14... Nxd4 15. Nxd4 exd4 16. Ng3 (16. Bg5 h6 17. Bh4 Qb6 18. Qd3
g5 19. Bg3 Be6 20. Rad1 Rfc8 21. Bb1 Nd7 22. e5 Nf8 23. Qf3 d5 24. Qh5 Kg7 25.
f4 f5 26. exf6+ Bxf6 27. fxg5 hxg5 28. Be5 d3+ 29. Kh1 Ng6 30. Qxg5 Bf7 {
Lasker,E-Tarrasch,S Germany 1908 1-0 (38)}) (16. b3 d5 17. Ng3 dxe4 18. Nxe4
Nxe4 19. Bxe4 Bb7 20. Bf4 Qd7 21. Bxb7 Qxb7 22. Qxd4 Bf6 23. Be5 Rad8 24. Qf4
Bxe5 25. Rxe5 Qa8 26. Qe3 Rfe8 27. Re1 {1/2-1/2 (27) Georgiev,K (2210)-Antonov,
V (2265) Bulgaria 1975}) 16... Nd7 (16... Be6 17. Nf5 Bxf5 18. exf5 Rfe8 19.
Bb3 d5 20. Bg5 h6 21. Bh4 {1/2-1/2 (21) Ismagambetov,A (2528)-Mchedlishvili,M 
(2613) Ravana 2009}) 17. Bb3 Qb6 18. Nf5 Bf6 19. Bf4 Ne5 20. Bd5 Ra7 21. Qb3
Rc7 22. g4 g6 23. Nh6+ Kg7 24. g5 Bd8 25. Qg3 f6 26. Nf5+ Kh8 27. Nh4 fxg5 28.
Bxg5 Bxg5 29. Qxg5 {Lasker,E-Tarrasch,S Germany 1908 0-1 (44)}) (14... Re8 15.
Ng3 g6 16. Be3 {1/2-1/2 (16) Hristodorescu,D (2198)-Helmer,J (2209) Satu Mare
2011}) (14... Nxd4 15. Nxd4 exd4 16. Ng3 $11) 15. b3 Bb7 (15... d5 16. Bb2 Nxe4
17. Rc1 $16) 16. Bb2 $14 Rac8 17. Rc1 Qb8 (17... exd4 18. Nxd4 Nxd4 19. Bxd4
$14) 18. Qd2 (18. Ne3 $16) 18... Rfe8 (18... Bd8 19. a3 $14) 19. Ne3 (19. d5
Na7 $18) 19... a5 (19... Bd8 20. d5 Ba5 21. Qe2 (21. dxc6 $4 {would lead to
instant doom} Bxd2 22. Nxd2 Bxc6 $19) 21... Bxe1 22. dxc6 Bxf2+ 23. Qxf2 Rxc6
24. Re1 $11) 20. Nd5 (20. d5 $142 $5 Nb4 21. Bb1 $16) 20... Nxd5 $11 21. exd5
Nb4 22. Be4 Rxc1 23. Rxc1 Bd8 $2 (23... exd4 $142 {and Black can hope to live}
24. Re1 Bxd5 (24... Nxd5 $143 25. Bxd5 (25. Bxd4 $6 Qa8 $11) (25. Qxa5 $6 Nc7
$11) (25. Nxd4 $143 Bf6 $15) (25. Qxd4 $143 Bf6 26. Qd2 Bxb2 27. Bxd5 Bxd5 28.
Qxd5 Rxe1+ 29. Nxe1 a4 $15) 25... Bxd5 26. Rxe7 (26. Qxd4 $6 Bf6 27. Rxe8+ Qxe8
28. Qxd5 Bxb2 $11) 26... Rxe7 27. Qxd4 $16) 25. Bxd5 Nxd5 26. Qxa5 d3 $11) 24.
dxe5 $18 dxe5 (24... Nxa2 $142 25. Re1 Nb4 $16) 25. Re1 (25. a3 Na6 26. Qe2 b4
$18) 25... Bf6 $2 (25... Qa8 $16) 26. d6 $4 {throwing away the advantage} (26.
a3 $142 {White has a promising position} Na6 27. Qxa5 $18) 26... Bxe4 (26...
Rd8 $5 27. Bxb7 Rxd6 $11) 27. Rxe4 $14 {[%cal Rb2e5,Re4e5,Rf3e5,Ge8e5,Gf6e5]
e5 seems the pivot of the position} Qb7 (27... Nc6 28. d7 Rd8 29. Qe2 $14) 28.
Qe2 (28. Re2 $5 Rd8 29. Bxe5 Bxe5 30. Nxe5 $16) 28... Qd5 $14 29. Bxe5 (29. Rd4
exd4 30. Qxe8+ Kh7 $14) 29... Nc6 $11 {Black threatens to win material: Nc6xe5}
30. Re3 $4 {gives the opponent new chances} (30. d7 $142 {had to be tried to
avoid defeat} Rxe5 31. Nxe5 Nxe5 32. Rxe5 Bxe5 33. Qxe5 Qxd7 34. Kh2 $11) 30...
Nxe5 $19 (30... Rxe5 $6 31. Nxe5 Nxe5 32. f4 $15) (30... Bxe5 $6 31. d7 Qxd7
32. Nxe5 $11) 31. Ne1 (31. Nxe5 Rxe5 (31... Bxe5 $6 32. d7 Qxd7 33. Rxe5 Rxe5
34. Qxe5 $11) 32. Qd3 Kf8 $19) 31... Rd8 ({Inferior is} 31... Qxd6 32. Qxb5 Qd8
33. Nd3 $19) 32. f4 Ng6 33. Re8+ Rxe8 34. Qxe8+ Nf8 35. d7 (35. Nf3 {is not
the saving move} Bd4+ 36. Kh1 Bf2 $19) 35... Qxd7 36. Qb8 (36. Qxd7 {no good,
but what else?} Nxd7 37. Kf2 $19) 36... Qd4+ 37. Kh2 Bh4 (37... b4 $142 {
makes sure everything is clear} 38. Nf3 Qf2 $19) 38. Nf3 Qf6 (38... Qf2 $142 {
seems even better} 39. Nxh4 Qxh4 $19) 39. Ne5 (39. f5 $19 {what else?}) 39...
Qxf4+ 40. Kh1 Bf6 (40... Bf6 41. Nc6 Qc1+ 42. Kh2 Qxc6 $19) 0-1

[Event "SapporoSummer2002"]
[Site "?"]
[Date "2022.07.18"]
[Round "4.1"]
[White "Aoki, Hiroyuki"]
[Black "Sugimoto, Koichi"]
[Result "0-1"]
[ECO "D13"]
[WhiteElo "1566"]
[BlackElo "1941"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "64"]
[SourceVersionDate "2022.07.18"]

{D13: Slav Defence: Exchange variation without ...Bf5} 1. c4 c6 2. Nf3 Nf6 3.
g3 d5 4. cxd5 cxd5 5. d4 Nc6 6. Bg2 Bf5 7. O-O h6 (7... e6 8. Nh4 Be4 9. f3
Bxb1 10. Rxb1 Nd7 11. f4 f5 12. e4 dxe4 13. Qh5+ g6 14. Nxg6 Nf6 15. Qh4 Rc8
16. Nxf8 Rxf8 17. b3 Qe7 18. Bb2 Nd5 19. Qxe7+ Kxe7 20. Ba3+ Ncb4 21. Rfc1 Rfe8
22. Bf1 {Seps,M (2260)-Bird,A (2203) Crawley 2013 0-1 (38)}) 8. Nc3 e6 9. Qa4
Bd6 $146 (9... Be7 10. Ne5 Qb6 11. Nxc6 bxc6 12. b3 O-O 13. Rd1 a5 14. Ba3 Bb4
15. Rac1 Qb7 16. e4 dxe4 17. h3 Rfc8 18. Nb1 Nd5 19. Rc4 Nb6 20. Rxb4 axb4 21.
Qxb4 Qa7 22. Qe1 e3 23. Bc5 Qxa2 24. fxe3 {Eggleston,D (2368)-Gordon,S (2521)
Hastings 2009 0-1 (33)}) 10. Nb5 Be7 11. Bf4 O-O 12. Rac1 (12. Ne5 $5 $11)
12... a6 $17 13. Nc3 Qb6 {Black threatens to win material: Qb6xb2} 14. Nd1 (14.
Qb3 Qxb3 15. axb3 g5 $17) 14... Rac8 15. a3 Be4 16. e3 $2 (16. Be3 $142 $5 $17)
16... Rfd8 (16... g5 {makes it even easier for Black} 17. Nxg5 hxg5 18. Bxg5
$19) 17. Rc3 (17. h4 Nd7 $19) 17... Nd7 (17... g5 $142 $5 18. Be5 Nd7 $19) 18.
g4 $17 g5 (18... Qa7 19. Nd2 b5 20. Qb3 $19) 19. Bg3 Rf8 (19... Qa7 20. Nd2 b5
21. Qb3 $17) 20. Ne5 Ndxe5 21. Bxe5 (21. dxe5 $5 Bg6 22. f4 $17) 21... Bxg2 (
21... Nxe5 22. Bxe4 Rxc3 23. bxc3 Nxg4 24. Bf3 $19) 22. Kxg2 $17 Nxe5 23. Rxc8
Rxc8 24. dxe5 Qc7 (24... Rc4 25. Qe8+ Bf8 $17) 25. Qd4 $2 (25. f4 gxf4 26. exf4
Qc1 $17) 25... Bf8 (25... Qc2 $142 $5 26. Qa7 Qb3 27. Qd4 $19) 26. f4 Qc2+ (
26... Qc1 $142 $5 27. Nf2 Qc2 $19) 27. Rf2 {White threatens to win material:
Rf2xc2} Qc4 28. Nc3 gxf4 29. Qxf4 (29. Rxf4 $2 Qxd4 30. Rxd4 Bg7 $19) 29...
Qxf4 {Black forks: e3, e5+g4} 30. Rxf4 $2 (30. exf4 $142 {and White could well
hope to play on} b5 31. Nd1 $15) 30... Bg7 $19 31. Rb4 Bxe5 32. e4 $2 (32. Rxb7
$142 Bxc3 33. bxc3 Rxc3 34. a4 $19) 32... d4 (32... d4 33. Nd1 Rc2+ 34. Nf2 b5
$19) 0-1

[Event "SapporoSummer2022"]
[Site "?"]
[Date "2022.07.18"]
[Round "4.2"]
[White "Ishii Hibiki"]
[Black "Takeuchi Hiroshi"]
[Result "1-0"]
[ECO "B07"]
[WhiteElo "1349"]
[BlackElo "1393"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "93"]
[SourceVersionDate "2022.07.18"]

{[%mdl 8256] B07: Pirc Defence: Miscellaneous Systems} 1. e4 d6 2. d4 Nf6 3.
Nc3 g6 4. Bg5 Bg7 5. Qd2 O-O {Black has a cramped position} 6. Be2 $146 (6.
O-O-O Nbd7 (6... c6 7. Kb1 b5 8. f3 Nbd7 9. e5 Ne8 (9... b4 10. exf6 exf6 11.
Bf4 bxc3 12. Qxc3 Qc7 13. Qa3 c5 14. dxc5 Nxc5 15. Ne2 Rd8 16. Nd4 Qb6 17. h4
f5 18. Bg5 Re8 19. c3 Rb8 20. Nb5 Bd7 21. Rxd6 Re1+ 22. Kc2 Qb7 23. Qxc5 Bxb5
24. Bxb5 {Rombaldoni,A (2374)-Sarno,S (2329) Saint Vincent 2008 1-0 (39)}) 10.
h4 f6 11. exf6 exf6 12. Be3 d5 13. h5 Rf7 14. hxg6 hxg6 15. g4 Nf8 16. Nh3 Re7
17. Nf4 Nc7 18. Bd3 Qe8 19. Rde1 a5 20. Bxb5 cxb5 21. Nfxd5 {Motylev,A (2634)
-Sturua,Z (2545) Dubai 2003 1-0 (61)}) 7. h4 c5 8. d5 b5 9. Bxb5 Rb8 10. Bh6
Bxh6 11. Qxh6 Qb6 12. f3 a6 13. Bxd7 Qxb2+ 14. Kd2 Bxd7 15. Nge2 Rb4 16. h5
Rd4+ 17. Nxd4 cxd4 18. Ne2 Rc8 19. Rc1 Bb5 20. hxg6 d3 {Lajos,J (2365)-Soos,A 
(2315) Hungary 1989 1-0 (60)}) (6. f3 c6 7. Bd3 Ne8 8. Nge2 b5 9. h4 f6 10. Be3
e5 11. h5 f5 12. hxg6 hxg6 13. dxe5 Bxe5 14. O-O-O b4 15. Bc4+ d5 16. Nxd5 Be6
17. Bg5 Qa5 18. Ne7+ Kf7 19. Bxe6+ Kxe6 20. Nxc6 Bxb2+ {Sluka,R (2310)-Pakosta,
S (2235) Czechia 1995 1-0}) (6. f4 Na6 7. O-O-O c5 8. e5 cxd4 9. Qxd4 Nd7 10.
Nf3 f6 11. Bxa6 bxa6 12. Qd5+ Kh8 13. Qxa8 fxg5 14. Nxg5 Nb6 15. Qxa7 Nc4 16.
Qd4 Qc7 17. Nd5 Qc6 18. Nxe7 Qa4 19. a3 dxe5 20. Qd5 Bf6 {Madl,I (2365)-Gietl,
T (2305) Postbauer 1997 1-0}) 6... Nbd7 7. h4 c6 {Black has a cramped position.
Black's piece can't move: c8} (7... b5 8. Bxb5 Rb8 9. Bxd7 Qxd7 10. O-O-O $14)
8. Bh6 (8. h5 $16) 8... Qc7 $2 (8... Bxh6 $142 $5 {is noteworthy} 9. Qxh6 c5
$11) 9. h5 (9. Bxg7 $142 Kxg7 10. h5 $16) 9... e5 $2 (9... Bxh6 10. Qxh6 b5 11.
Nh3 $16) 10. dxe5 $4 {White forks: d6+f6. releasing the pressure on the
opponent} (10. hxg6 $142 $5 fxg6 11. Bxg7 Kxg7 12. Qh6+ Kh8 13. Nf3 $18) 10...
Nxe5 (10... Bxh6 11. Qxh6 Nxe5 12. Nh3 Bxh3 13. Rxh3 $14) 11. hxg6 (11. Bxg7 $5
Kxg7 12. O-O-O $16) 11... fxg6 $14 (11... hxg6 $4 12. Bxg7 Nfg4 13. Bxf8 Kxf8
14. f4 $18) 12. f3 {Consolidates g4} (12. Bxg7 Kxg7 13. a3 d5 14. exd5 Nxd5 15.
Nxd5 cxd5 $14) 12... Rf7 (12... Bxh6 13. Rxh6 Nf7 14. Rh1 $11) 13. O-O-O (13.
Bxg7 Kxg7 (13... Rxg7 $143 14. O-O-O $16) 14. O-O-O Nh5 $14) 13... b5 (13...
Bxh6 14. Rxh6 b5 15. Rh4 $11) 14. Bxg7 $14 ({Instead of} 14. Qxd6 Qxd6 15. Rxd6
Bxh6+ 16. Rxh6 Nh5 $11) 14... Rxg7 $2 (14... Kxg7 $142 $5 {looks like a viable
alternative} 15. Qxd6 Qxd6 16. Rxd6 Nh5 $14) 15. Qxd6 $16 Qxd6 16. Rxd6 Ne8 17.
Rd8 Kf7 18. Rd2 (18. Rd1 Ke7 $16) 18... b4 (18... g5 $5 $16) 19. Na4 $18 Ke7 (
19... g5 20. g3 Nd7 21. f4 $18) 20. Nh3 (20. f4 Nd7 $18) 20... Bxh3 21. Rxh3
Nd6 $2 (21... g5 22. Nc5 Nf6 23. Na6 $18) 22. b3 (22. f4 $142 $5 {might be the
shorter path} Nec4 23. Rd4 Nb6 24. Rxb4 Nxa4 25. Rxa4 Kf8 $18) 22... Nd7 (22...
Rf8 23. Rh1 $18) 23. Rh1 Rf7 $4 {shortens the misery for Black} (23... Rd8 $18)
24. Rhd1 Rf6 {[%tqu "En","","","","f3f4","",10]} 25. f4 $1 {Deflection: d6} Re6
(25... Rxf4 26. Rxd6 {Deflection}) 26. e5 Rd8 (26... Nxe5 {praying for a
miracle} 27. fxe5 Rxe5 $18) 27. Rxd6 Rxd6 28. Rxd6 Rf8 (28... Nb8 {does not
help much} 29. Rf6 $18) 29. Bg4 Nb8 30. g3 h5 (30... Rf7 {doesn't change the
outcome of the game} 31. Kb2 $18) 31. Bh3 g5 (31... h4 {is not the saving move}
32. Re6+ Kf7 33. gxh4 $18) 32. f5 g4 33. f6+ Kf7 (33... Rxf6 {is the last straw
} 34. Rxf6 gxh3 $18) 34. Bf1 h4 35. Bc4+ Kg6 36. f7+ Kf5 37. gxh4 Kxe5 38. Rg6
(38. Re6+ $142 {and White can already relax} Kf5 39. Re8 $18) 38... Kf5 (38...
Nd7 $18 {is one last hope}) 39. Rg8 Nd7 40. Nc5 Nxc5 41. Rxf8 Kf4 (41... Ne6 {
is not much help} 42. Re8 Nf8 43. Rxf8 Kf4 44. Rd8 Kg3 45. f8=Q a6 46. Rd3+ Kg2
47. Rd2+ Kh3 48. Qf4 Kxh4 49. Rh2#) 42. Rg8 (42. Rd8 Nd7 43. Rxd7 Kf3 44. f8=Q+
Kg3 45. Rd3+ Kg2 46. Qf4 a5 47. Qg3+ Kh1 48. Rd1#) 42... Nd7 43. h5 g3 (43...
a5 {doesn't get the bull off the ice} 44. Rd8 Nb8 45. f8=Q+ Kg5 46. Rd4 Na6 47.
Qf4+ Kxh5 48. Rd6 g3 49. Be2#) 44. h6 Kf3 (44... Nf8 {doesn't change anything
anymore} 45. Rxf8 Ke5 46. Re8+ Kf5 47. f8=Q+ Kg4 48. Re4+ Kg5 49. Rf4 g2 50.
Qf6+ Kh5 51. Be2#) 45. h7 g2 (45... Nf8 {is not much help} 46. h8=Q Ng6 47.
Rxg6 Ke4 48. f8=Q g2 49. Re6#) 46. h8=Q Kf2 (46... g1=Q+ {hardly improves
anything} 47. Rxg1 Kf2 48. Qd4+ Kf3 49. Kd2 Ne5 50. Qe3#) 47. Qh2 (47. Qh2 Ke3
48. Rg4 g1=Q+ 49. Qxg1+ Kf3 50. Qg3#) (47. Qd4+ Kf3 48. Kd2 g1=Q 49. Be2#) 1-0

[Event "SapporoSummer2022"]
[Site "?"]
[Date "2022.07.18"]
[Round "4.3"]
[White "Nishimori, Toshiyuki"]
[Black "Yoshii, Yukihiko"]
[Result "0-1"]
[ECO "C50"]
[WhiteElo "1684"]
[BlackElo "1686"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "78"]
[SourceVersionDate "2022.07.18"]

{[%mdl 8256] C50: Hungarian Defence and Giuoco Pianissimo} 1. e4 e5 2. Nf3 Nc6
3. Bc4 Nf6 4. Nc3 Be7 5. O-O O-O 6. d4 exd4 (6... Nxe4 7. Nxe4 d5 8. Bxd5 Qxd5
9. Nc3 Qd6 10. d5 Nd8 11. Qe2 f6 12. Nb5 Qd7 13. c4 Nf7 14. h3 c6 15. Nc3 Bb4
16. dxc6 Qxc6 {1/2-1/2 (16) Seils,J (2342)-Schoewel,M (2220) Germany 2012}) 7.
Nxd4 Ne5 {Black threatens to win material: Ne5xc4} 8. Bb3 $146 (8. Be2 d6 9. f4
Ng6 10. f5 Ne5 11. Bg5 b6 12. Nf3 Nfg4 13. Bxe7 Qxe7 14. Nd5 Qd8 15. Nxe5 Nxe5
16. f6 Nd7 17. Qd2 gxf6 18. Qh6 Kh8 19. Nxf6 Nxf6 20. Rxf6 Be6 21. Raf1 Qe7 22.
e5 Rg8 {Allen,D (2250)-Ma,E (2200) Istanbul 2000 1/2-1/2 (41)}) 8... d6 9. h3 {
Secures g4} a6 {Prevents intrusion on b5} 10. Be3 b5 (10... c5 11. Nf3 $14) 11.
a3 {Black has a cramped position} (11. f4 $5 Nc4 12. Bxc4 bxc4 13. Nc6 $16)
11... Bb7 12. f3 {Covers g4} c5 (12... g6 13. Qd2 $11) 13. Nf5 $14 c4 {Black
threatens to win material: c4xb3} 14. Ba2 Qd7 (14... Bc8 15. Nxe7+ Qxe7 16. Qd2
$14) 15. Nxe7+ (15. Qd2 $5 $16) 15... Qxe7 $14 16. b3 (16. Qd2 h6 $14) 16...
Rac8 17. bxc4 (17. Qd2 $142 $5 $14 {has some apparent merit}) 17... Nxc4 $15
18. Bxc4 Rxc4 {Praise the rook!} 19. Ne2 (19. Qd3 Qc7 20. Bd4 Nd7 $15) 19... d5
20. Ng3 $2 (20. e5 $142 $17) 20... dxe4 $19 21. fxe4 Nxe4 (21... Bxe4 $142 $5
22. Nxe4 Nxe4 $19) 22. Nf5 $17 Qe5 (22... Qe8 23. Bh6 Ng3 (23... gxh6 $143 24.
Qg4+ Ng5 25. Nxh6+ Kh8 26. Qxg5 $16) 24. Nxg3 Qc6 $17) 23. Qg4 $4 {there were
better ways to keep up the pressure} (23. Bd4 Qe6 24. Qg4 g5 $11) 23... g6 $4 {
gives the opponent counterplay} (23... Bc8 $142 {and Black could have gained
the advantage} 24. Rae1 Bxf5 (24... Rxc2 $4 {a poisoned pawn} 25. Nh6+ Kh8 26.
Nxf7+ Rxf7 27. Rxf7 $18) 25. Qxf5 Qxf5 26. Rxf5 Re8 $19) 24. Nh6+ $11 Kg7 25.
Nf5+ $4 {White is ruining his position} (25. Nxf7 $142 {would save the game}
Rxf7 26. Rxf7+ Kxf7 27. Qd7+ Kg8 28. Qd8+ Kg7 29. Qd7+ Kg8 30. Qd8+ Kf7 31.
Qd7+ Kg8 $11) 25... Kh8 $19 26. Bh6 (26. Nh6 f5 27. Qd1 $19) 26... Rg8 (26...
gxf5 $142 {seems even better} 27. Qf4 Qc5+ 28. Qe3 $19) 27. Bg7+ $4 {causes
even greater problems} (27. Ne3 Rc6 28. Qd7 $11) 27... Rxg7 $19 28. Nxg7 (28.
Ne3 {does not improve anything} Qc5 29. Rae1 Rxc2 $19) 28... Kxg7 (28... Ng3
$142 {and Black has prevailed} 29. Qd7 Ne2+ 30. Kh1 $19) 29. Qd7 (29. Qf3 {
desperation} Bd5 30. Qe3 $19) 29... Bd5 30. Rad1 Be6 (30... Nc3 {might be the
shorter path} 31. Rd2 Rd4 32. Rxd4 Ne2+ 33. Kf2 Qxd4+ 34. Ke1 $19) 31. Qb7 (31.
Qe7 {the only chance to get some counterplay} Ng5 32. Rd3 Rxc2 33. Qd6 $19)
31... Qc5+ (31... Rxc2 $142 {and Black can celebrate victory} 32. Qa7 Nc5 33.
Qa8 Qe3+ 34. Kh1 $19) 32. Kh2 Qxa3 (32... Ng5 $142 {and Black can already relax
} 33. c3 Rxc3 34. Qb8 $19) 33. Rd3 (33. Qa7 {hardly improves anything} Qb2 34.
c3 Qxc3 $19) 33... Qb2 34. Rdf3 (34. Qa7 {doesn't improve anything} Rxc2 35.
Qd4+ Qxd4 36. Rxd4 Nc3 $19) 34... Qe5+ (34... Qxc2 $6 {is a useless try} 35.
Rxf7+ Bxf7 36. Qxf7+ Kh6 37. Qf8+ Kh5 38. Qf3+ Kg5 39. Qe3+ Kh5 40. Qf3+ Kg5
41. Qe3+ Kh5 42. Qf3+ $11) 35. Kg1 Ng5 36. Rd3 (36. R3f2 {does not win a prize}
Bd5 37. Qd7 Rh4 $19) 36... Rxc2 37. Rd8 Nxh3+ $1 {Deflection: g2} 38. Kh1 (38.
gxh3 Qh2# {Mate attack Deflection Pinning}) 38... Nf4 (38... Qh5 39. Rxf7+ Bxf7
40. Qe4 Nf2+ 41. Kg1 Qh1#) 39. Qe7 Qh5+ (39... Qh5+ 40. Qh4 Qxh4+ 41. Kg1 Rxg2#
) 0-1

[Event "SapporoSummer2022"]
[Site "?"]
[Date "2022.07.18"]
[Round "4.4"]
[White "Nakamura, Mitsuru"]
[Black "Ogawa, Taishi"]
[Result "0-1"]
[ECO "B31"]
[WhiteElo "1355"]
[BlackElo "1613"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "102"]
[SourceVersionDate "2022.07.18"]

{[%mdl 8192] B31: Sicilian: 2...Nc6 3 Bb5 g6} 1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4.
O-O e6 (4... Nd4 5. Bc4 Bg7 6. c3 Nxf3+ 7. Qxf3 e6 8. d4 cxd4 9. cxd4 Ne7 10.
Bg5 O-O 11. Nc3 h6 12. Be3 a6 13. Rad1 b5 14. Bb3 d6 15. Qh3 Kh7 16. f4 Bd7 17.
e5 d5 18. g4 Rc8 19. Rf2 {Kuijf,M (2490)-Andersson,U (2630) Wijk aan Zee 1990
0-1 (33)}) 5. Re1 $146 (5. c3 Bg7 6. d4 cxd4 7. cxd4 Qb6 8. Nc3 Nge7 9. d5 Bxc3
10. bxc3 Qxb5 11. dxc6 Nxc6 12. Qd6 f6 13. Ba3 Kf7 14. Rab1 Qa6 15. Nd4 Re8 16.
Nb5 Na5 17. Qxa6 bxa6 18. Nd6+ {1-0 (18) Westerinen,H (2335)-Andersson,B (2277)
Fredericia 2013}) 5... Nge7 6. c3 {Consolidates b4+d4} a6 {Black threatens to
win material: a6xb5} 7. Bf1 (7. Bxc6 Nxc6 8. d4 cxd4 9. cxd4 Bg7 $14) 7... d5 (
7... Bg7 8. d4 cxd4 9. cxd4 $11) 8. d4 (8. exd5 Qxd5 9. d4 cxd4 10. cxd4 Bg7
$14) 8... c4 {Black gains space} (8... dxe4 $5 9. Rxe4 Bg7 $15) 9. Bg5 (9. exd5
exd5 10. Nbd2 Bh6 $16) 9... Bg7 $14 10. Nbd2 O-O 11. b3 {White threatens to
win material: b3xc4} f6 {Black threatens to win material: f6xg5} 12. Bh4 b5 (
12... g5 13. exd5 Nxd5 14. bxc4 Nxc3 $11) 13. a4 (13. bxc4 bxc4 14. Rb1 Ra7 $14
) 13... Bd7 (13... b4 14. exd5 Nxd5 15. Nxc4 $17) 14. Bg3 (14. bxc4 $142 bxc4
15. Bg3 $14) 14... e5 $2 (14... b4 $142 {and Black is still in the game} 15.
exd5 Nxd5 16. bxc4 Nxc3 $14) 15. axb5 axb5 16. Rxa8 Qxa8 17. bxc4 dxc4 18. d5 {
White threatens to win material: d5xc6} (18. dxe5 $5 Qa7 19. exf6 Bxf6 20. e5
$16) 18... Nd8 $14 19. Nxc4 (19. Qb1 $142 $5 $14 {is a viable option}) 19...
bxc4 $17 20. Bxc4 (20. Nd2 Nc8 $17) 20... Kh8 (20... Nc8 $5 $19) 21. Qb3 Nb7
22. h3 (22. Qb4 Nc8 $17) 22... Nd6 23. Nd2 (23. Bd3 Rb8 24. Qc2 Qa3 $19) 23...
Rb8 (23... Bh6 24. Nf3 Rb8 25. Qa2 Qxa2 26. Bxa2 $19) 24. Qd1 (24. Qc2 Qa3 25.
Rb1 Rxb1+ 26. Qxb1 Nec8 $19 (26... Nxc4 27. Nxc4 Qxc3 28. Qb8+ Ng8 29. Nb6 $15)
) 24... Bh6 25. Bd3 Rb2 (25... Qa3 26. Nb1 Qa1 27. c4 $19) 26. Nc4 Nxc4 27.
Bxc4 Nc8 28. d6 $2 (28. Re2 $142 Rxe2 29. Bxe2 $17) 28... Rd2 (28... Nb6 {
and Black can already relax} 29. Bd5 Qa3 30. Qf3 Qxd6 31. c4 $19) 29. Qb3 Nxd6
(29... Bc6 {might be the shorter path} 30. d7 Rxd7 31. Be6 $19) 30. Bd5 Bc6 31.
c4 Bxd5 32. cxd5 (32. exd5 Qa7 $19) 32... Qa7 33. Qb4 Nf7 (33... Qc7 34. Ra1
$19) 34. Qc3 $2 (34. Rc1 $142 Kg7 35. Rc8 Rd1+ 36. Kh2 $19) 34... Bf4 (34...
Ra2 {seems even better} 35. Kh1 Kg7 36. Rd1 $19) 35. Rf1 Bh6 36. Qc6 $4 {
throwing away the advantage} (36. Re1 Ra2 37. Qf3 $19) 36... Qe7 (36... Kg7
$142 $5 {makes it even easier for Black} 37. Qc4 $19) 37. Ra1 Bf8 38. Bh4 g5
39. Bg3 h5 (39... Kg7 $142 40. Kh2 h5 $19) 40. Qa8 $4 {shortens the misery for
White} (40. h4 Kg8 $19) 40... Qc5 (40... h4 $142 {and Black has reached his
goal} 41. Qa5 Rd4 $19) 41. h4 Rc2 (41... Kg7 42. Qb7 Qb4 43. Qxb4 Bxb4 44. f3
$19) 42. Ra5 (42. hxg5 $5 Nxg5 43. Ra6 $17) 42... Qc8 $19 43. Qa7 $4 {an
oversight. But White was lost anyway.} (43. Qxc8 Rxc8 44. Ra2 Rc1+ 45. Kh2 Bc5
$19) 43... Rc7 (43... Kg7 $142 {keeps an even firmer grip} 44. Ra1 gxh4 45.
Bxh4 $19) 44. Qb6 (44. Qa6 Kg7 45. Kh2 Qxa6 46. Rxa6 Rc2 $19) 44... Bd6 45.
hxg5 $2 (45. Kh2 $19) 45... fxg5 46. Qb3 (46. Ra7 {does not help much} Rxa7 47.
Qxa7 Kg7 $19) 46... Rc1+ 47. Kh2 h4 48. Qf3 (48. Bxh4 {doesn't get the cat off
the tree} Kg7 49. Qh3 Qxh3+ 50. Kxh3 Rh1+ 51. Kg4 Rxh4+ 52. Kf3 Rf4+ 53. Ke3 g4
$19) 48... hxg3+ 49. fxg3 (49. Qxg3 {is still a small chance} Re1 50. Qh3+
Qxh3+ 51. gxh3 Rxe4 52. Kg2 $19) 49... Kg7 50. Ra7 (50. g4 {does not save the
day} Bc5 51. d6 Qh8+ 52. Qh3 Bg1+ 53. Kh1 Be3+ 54. Kh2 Bf4+ 55. g3 Rh1+ 56.
Kxh1 Qxh3+ 57. Kg1 Be3#) 50... Qh8+ 51. Qh5 Qxh5# 0-1

[Event "SapporoSummer2022"]
[Site "?"]
[Date "2022.07.18"]
[Round "4.5"]
[White "Fujii, Nathan"]
[Black "Ito, Katsuhide"]
[Result "1-0"]
[ECO "D02"]
[BlackElo "1296"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "49"]
[SourceVersionDate "2022.07.18"]

{[%mdl 8192] D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6
3 Bf4} 1. Nf3 Nc6 2. d4 d5 3. Bf4 f6 (3... e6 4. e3 Bd6 5. Bg3 Nf6 6. c4 Ne4 7.
Nc3 O-O 8. cxd5 exd5 9. Bd3 Re8 10. Bh4 Be7 11. Bxe7 Rxe7 12. Qb3 Nf6 13. O-O
Bg4 14. Qxb7 Re6 15. Ng5 Rd6 16. Nb5 Rb8 17. Nxd6 Rxb7 18. Nxb7 {Oms Pallisse,
J (2450)-Gonzalez Velez,F (2400) Spain 1997 1/2-1/2 (34)}) 4. e3 (4. c4 dxc4 5.
Nc3 Bg4 6. d5 e5 7. Be3 Na5 8. Qa4+ c6 9. dxc6 Nxc6 10. Qxc4 Qc8 11. Rc1 Bb4
12. a3 Be6 13. Qd3 Bxc3+ 14. Qxc3 Nge7 15. Bc5 b6 16. Bxe7 Nxe7 17. e3 Qxc3+
18. Rxc3 Rc8 {Shtyrenkov,V (2378)-Zemlyansky,D (2254) Volgograd 2010 1-0 (45)})
4... a6 $146 {Controls b5} (4... Bg4 5. Bb5 (5. Be2 e5 6. dxe5 Bxf3 7. Bxf3
fxe5 8. Bg3 e4 9. Bh5+ g6 10. Be2 Bd6 11. c3 Bxg3 12. hxg3 Nf6 13. Nd2 Qd6 14.
Nb3 O-O-O 15. Qc2 h5 16. O-O-O Qe7 17. Nd4 Ne5 18. Kb1 Rhf8 19. Qa4 Kb8 {
Yurchenko,Y (2265)-Zemlyansky,D (2208) Volgograd 2009 0-1}) 5... h5 6. h3 Bd7
7. Nbd2 Ne5 8. Bxd7+ Nxd7 9. c4 c6 10. cxd5 cxd5 11. Qb3 Nb6 12. a4 Rc8 13. Qd3
Nh6 14. O-O g5 15. Qg6+ Nf7 16. Bxg5 Nc4 17. Nxc4 Rxc4 18. Bf4 Rc6 19. Rac1 {
Castro Perez,M (2275)-Barcelo Pujadas,P (2265) Sant Cebria 1998 1-0 (39)}) (
4... e6 5. c4 $14) 5. Bd3 (5. c4 $5 e6 6. cxd5 exd5 7. Nc3 $14) 5... e6 {
Secures f5} 6. Nbd2 Bd6 7. Bg3 Nge7 8. Qe2 (8. c4 Nb4 9. Be2 b6 $14) 8... Nb4
9. Qd1 (9. O-O O-O $11) 9... Nxd3+ 10. cxd3 O-O 11. Bxd6 Qxd6 12. O-O e5 13.
dxe5 fxe5 14. h3 {Controls g4} Be6 {White has a cramped position} 15. Ng5 Bf5
16. e4 dxe4 (16... Bg6 $142 $11) 17. Ngxe4 (17. Qb3+ $142 {and White can hope
to survive} Kh8 18. Qxb7 Qxd3 19. Ndxe4 $11 (19. Ngxe4 $2 Rab8 20. Qxc7 Nd5 $17
)) 17... Qxd3 $17 18. Nc5 (18. Re1 Rad8 $17) 18... Qb5 {Black threatens to win
material: Qb5xc5. Black forks: b2+c5} (18... Qd5 19. Qb3 b6 $17) 19. Ncb3 $2 (
19. Qb3+ $142 $5 {might be a viable alternative} Qxb3 20. axb3 $17) 19... Rad8
(19... Ng6 $142 20. a4 Qb6 $19) 20. Qh5 $2 (20. Re1 $142 $17) 20... Ng6 $19 21.
Nf3 (21. g3 a5 22. Nf3 $19) 21... Nf4 22. Qh4 Rd6 23. Qe7 (23. Nbd4 {is no
salvation} Nxh3+ (23... Rxd4 $6 24. Nxd4 Qd5 25. Nf3 $19) 24. Qxh3 Qxf1+ (24...
Bxh3 $6 25. Nxb5 axb5 26. Nxe5 $17) 25. Rxf1 Bxh3 26. Nxe5 Bxg2 27. Kxg2 Rxd4
$19) 23... Rg6 (23... Bxh3 24. Rfd1 Bxg2 25. Rxd6 cxd6 26. Nbd2 Bxf3 27. Nxf3
$19) 24. Nh4 Re6 (24... Qc6 $5 {keeps an even firmer grip} 25. g3 Bxh3 26. Rac1
$19) 25. Qxc7 (25. Qxc7 Bxh3 $1 {Decoy: h3} 26. Rfd1 $19 (26. gxh3 $4 Qd3 27.
f3 Rg6+ 28. Kh2 Qe2+ 29. Kh1 Rg3 $19)) 1-0

[Event "SapporoSummer2002"]
[Site "?"]
[Date "2022.07.18"]
[Round "5.1"]
[White "Sugimto, Koichi"]
[Black "Ogawa, Taishi"]
[Result "1-0"]
[ECO "A52"]
[WhiteElo "1941"]
[BlackElo "1613"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "49"]
[SourceVersionDate "2022.07.18"]

{[%mdl 8192] A52: Budapest Gambit} 1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. Bf4 Nc6 5.
Nf3 Bb4+ 6. Nbd2 Qe7 {[%cal Rc6e5,Re7e5,Rg4e5,Gf3e5,Gf4e5] e5 seems the pivot
of the position} 7. e3 Ngxe5 8. Nxe5 Nxe5 9. Be2 O-O $146 (9... a5 10. O-O d6 (
10... O-O 11. Nb3 a4 12. a3 (12. Nd4 Rd8 13. Qc2 d6 14. a3 Bc5 15. Rad1 Bd7 16.
Bg3 Re8 17. Rfe1 Qf6 18. h3 Bb6 19. Rf1 h6 20. Kh2 Re7 21. Kh1 Ree8 22. Kh2 {
1/2-1/2 (22) Schoen,W (2430)-Forintos,G (2385) Malmo 1988}) 12... Ba5 13. Nd4
Bb6 14. Nb5 d6 15. Nc3 Be6 16. Nxa4 Ba7 17. c5 Rad8 18. Qc2 Qf6 19. cxd6 cxd6
20. Nc3 Bb8 21. Bg3 d5 22. Nb5 Nc4 23. Nd4 Bxg3 24. hxg3 Rc8 25. Bxc4 {Karpov,
A (2725)-Budnikov,A (2520) Moscow 1993 1-0}) 11. Nb3 a4 12. a3 Ba5 13. Nd4 Bd7
14. Nb5 Bb6 15. Nc3 Bc5 16. Nd5 Qd8 17. b4 axb3 18. Qxb3 O-O 19. a4 Ng6 20. Bg3
b6 21. Rfd1 Bc6 22. Nb4 Bxb4 23. Qxb4 Ra5 24. Ra3 {Chow,A (2310)-Sprenkle,D 
(2325) Chicago 1985 1/2-1/2 (63)}) (9... b6 10. a3 Bxd2+ 11. Qxd2 Bb7 12. O-O
d6 13. Qc3 f6 14. b4 c5 15. Rfd1 O-O 16. Rd2 Rfd8 17. Rad1 Rac8 18. h3 cxb4 19.
Qxb4 d5 20. Bxe5 fxe5 21. Bg4 Rc7 22. Qb3 d4 23. exd4 exd4 24. Re2 {Gijsen,S 
(2169)-Schuh,D (2370) Dortmund 2015 0-1 (32)}) (9... Ng6 10. Bxc7 d5 11. Bg3
dxc4 12. Bxc4 O-O 13. a3 Bxd2+ 14. Qxd2 Rd8 15. Qe2 h5 16. Qxh5 Qe4 17. Be2 Be6
18. O-O Qc2 19. Bf3 Rac8 20. Bxb7 Rc5 21. Qf3 Qxb2 22. Rfb1 Qc3 23. Rd1 Rxd1+
24. Rxd1 {Maric,A (2305)-Gurieli,N (2340) Kuala Lumpur 1990 1-0 (36)}) 10. a3 {
White threatens to win material: a3xb4} Bd6 (10... Bxd2+ 11. Qxd2 d6 12. O-O
$11) 11. O-O (11. Ne4 Nxc4 12. Nxd6 Nxd6 $16) 11... b6 (11... Nc6 12. Bxd6 Qxd6
13. Ne4 $14) 12. Qc2 (12. Ne4 Bb7 13. Nxd6 cxd6 $16) 12... f5 (12... Bb7 13.
Ne4 $11) 13. Nf3 $14 Nxf3+ (13... Rb8 14. Rfd1 $14) 14. Bxf3 $16 Bxf4 (14...
Rb8 $5 $16) 15. Bxa8 ({Less advisable is} 15. exf4 c6 $16) 15... Bxh2+ $2 (
15... Be5 $142 16. Bd5+ Kh8 $16) 16. Kxh2 $18 Qh4+ (16... c6 17. Kg1 Qe5 $18)
17. Kg1 c6 18. Rfd1 f4 (18... Qf6 {doesn't change the outcome of the game} 19.
c5 $18) 19. Rd4 g5 (19... Qh6 {a fruitless try to alter the course of the game}
20. Rxf4 Rxf4 21. exf4 Qxf4 22. Re1 $18) 20. exf4 gxf4 21. Qe4 (21. Re1 Qf6 22.
Qd2 h5 $18) 21... d5 (21... Qf6 {what else?} 22. Re1 a5 $18) 22. cxd5 Qg5 (
22... c5 {doesn't do any good} 23. Ra4 Qf6 24. Rxa7 $18) 23. dxc6 f3 (23... Qg7
{cannot change what is in store for White} 24. Bb7 f3 25. g3 $18) 24. Qd5+ Kh8
25. Qxg5 (25. Qxg5 Be6 26. Qe5+ Kg8 27. Qxe6+ Rf7 28. c7 h5 29. Rd7 fxg2 30.
c8=Q+ Kh7 31. Rxf7#) 1-0

[Event "SapporoSummer2022"]
[Site "?"]
[Date "2022.07.18"]
[Round "5.2"]
[White "Ishii Hibiki"]
[Black "Aoki Yasuhiro"]
[Result "0-1"]
[ECO "B07"]
[WhiteElo "1349"]
[BlackElo "1566"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "72"]
[SourceVersionDate "2022.07.18"]

{B07: Pirc Defence: Miscellaneous Systems} 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Bg5
Bg7 5. Qd2 c6 6. Be2 (6. f3 b5 7. Bd3 Nbd7 8. Nge2 Bb7 9. Bh6 Bxh6 10. Qxh6 e5
11. O-O-O a6 12. g4 exd4 13. Nxd4 c5 14. Ndxb5 axb5 15. Nxb5 Ra6 16. Be2 Ke7
17. Qf4 Qb8 18. g5 Nh5 19. Qe3 Re8 20. Nc3 Rb6 {Krizsany,L (2395)-Vaulin,A 
(2550) Budapest 1994 0-1 (31)}) 6... b5 7. a3 {White has a very active position
} Nbd7 $146 (7... Bb7 8. f4 a5 9. Bf3 b4 10. Nd1 Qb6 11. axb4 axb4 12. Rxa8
Bxa8 13. e5 dxe5 14. fxe5 Nd5 15. Ne2 f6 16. Bh6 O-O 17. h4 Qc7 18. h5 g5 19.
Bxg5 fxg5 20. h6 Bf6 21. Nf2 Nd7 22. exf6 {Neulinger,M (2348)-Koch,W (2312)
Feffernitz 2001 1-0 (41)}) (7... a6 8. h4 (8. h3 Nbd7 9. Nf3 Qc7 10. O-O O-O
11. Rfe1 e5 12. Rad1 Re8 13. Bf1 Bb7 14. dxe5 dxe5 15. Bh6 Nf8 16. Bxg7 Kxg7
17. Qg5 h6 18. Qe3 Ne6 19. Rd2 Rad8 20. Red1 Rxd2 21. Rxd2 c5 22. Nd5 Bxd5 {
Karl,H (2255)-Espig,L (2405) Schaan 1998 0-1 (40)}) 8... Qb6 9. h5 Nxh5 10.
Bxh5 gxh5 11. Nge2 Nd7 12. Rxh5 Nf6 13. Rh4 Be6 14. f3 O-O-O 15. O-O-O c5 16.
d5 Bd7 17. Bh6 Bxh6 18. Rxh6 Kb8 19. g4 Rc8 20. g5 Ne8 21. Rdh1 Nc7 22. Rxh7 {
Karanovic,R (2246)-Veljkovic,M (2237) Belgrade 2011 1/2-1/2 (48)}) 8. h4 h5 9.
f3 {Prevents intrusion on g4} (9. Nf3 Bb7 $14) 9... Qa5 10. Na2 (10. Nh3 O-O
$14) 10... Qxd2+ 11. Kxd2 {White loses the right to castle} Bb7 12. Nh3 a6 13.
Nf2 c5 14. c3 O-O 15. Bd3 (15. Nc1 e5 16. dxe5 Nxe5 $11) 15... e5 16. d5 {
White wins space} Rfe8 (16... c4 17. Bc2 $15) 17. g4 (17. c4 bxc4 18. Bxc4 Nh7
$11) 17... Nf8 (17... c4 18. Bc2 $15) 18. gxh5 (18. c4 $5 bxc4 19. Bxc4 $14)
18... Nxh5 $11 19. Rag1 Nh7 20. Nc1 (20. c4 Nxg5 21. hxg5 Rab8 $11) 20... Nxg5
21. Rxg5 $2 (21. hxg5 $142 {would allow White to play on} c4 22. Be2 $11) 21...
Bh6 22. Ng4 Bxg5+ 23. hxg5 Kg7 24. Ne2 (24. c4 bxc4 25. Bxc4 Rh8 $19) 24... Rh8
25. Rh2 (25. c4 bxc4 26. Bxc4 f5 $19) 25... Bc8 (25... c4 {makes it even
easier for Black} 26. Bc2 $19) 26. Rg2 Bd7 27. b3 Rh7 28. Ke3 Rah8 29. Kf2 $2 (
29. Rg1 $19) 29... Bxg4 30. Rxg4 Kg8 (30... Nf4 $142 $5 {keeps an even firmer
grip} 31. Nxf4 exf4 32. Bf1 Rh2+ 33. Bg2 $19) 31. c4 bxc4 32. Bxc4 a5 33. a4
Ng7 (33... Kg7 34. Ke3 $19) 34. Bd3 (34. Nc3 Rh2+ 35. Rg2 Rxg2+ 36. Kxg2 Kf8
$19) 34... Rh2+ 35. Rg2 Rxg2+ 36. Kxg2 Rh5 0-1

[Event "SapporoSummer2022"]
[Site "?"]
[Date "2022.07.18"]
[Round "5.3"]
[White "Yoshii, Yukihiko"]
[Black "Takeuchi, Hiroshi"]
[Result "1/2-1/2"]
[ECO "E97"]
[WhiteElo "1686"]
[BlackElo "1393"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "107"]
[SourceVersionDate "2022.07.18"]

{[%mdl 8192] E97: King's Indian: Classical Main Line (6...e5 7 0-0 Nc6): 8 Be3
and 8 d5 Ne7, not 9 Ne1} 1. c4 Nf6 2. Nc3 d6 3. d4 g6 4. e4 Bg7 5. Nf3 O-O 6.
Be2 e5 7. O-O Nc6 8. d5 Ne7 9. h3 Nd7 (9... Ne8 10. Bg5 f6 11. Bh4 Kh8 12. Qd2
Ng8 13. b4 Qe7 14. Rab1 h5 15. Bg3 Bh6 16. Qd3 Ng7 17. Bh4 g5 18. Bg3 f5 19. c5
f4 20. Bh2 g4 21. hxg4 hxg4 22. Nd2 Nh5 23. cxd6 cxd6 24. g3 {WoDra (2534)
-McShane (2381) playchess.com INT 2006 0-1 (35)}) (9... a5 10. Be3 Ne8 11. Qd2
f5 12. exf5 gxf5 13. Bh6 f4 14. Bxg7 Nxg7 15. Bd3 Nef5 16. Rfe1 Nh5 17. a3 Bd7
18. b4 Qe7 19. Nb5 Be8 20. Bxf5 Rxf5 21. bxa5 Qg7 22. Kh1 Nf6 23. Rg1 Rh5 24.
Kh2 {Da Silva,H (2219)-Violla Cunha,M (2322) Rio de Janeiro 2015 0-1 (31)}) 10.
Be3 a6 $146 {Covers b5} (10... f5 11. exf5 gxf5 12. Ng5 Nf6 13. f4 Bh6 14. Qd2
exf4 15. Bxf4 Ng6 16. g3 Nxf4 17. gxf4 Ne4 18. Ncxe4 fxe4 19. Qe3 Qf6 20. Bg4
Bxg4 21. hxg4 Bxg5 22. fxg5 Qxb2 23. Qxe4 Rae8 24. Rxf8+ Rxf8 25. Rf1 {Grachev,
B (2483)-Gubajdullin,A (2344) Samara 2003 1/2-1/2 (41)}) (10... a5 11. Qa4 $14)
11. a4 (11. a3 f5 $14) 11... f5 $14 {Nimzovich: attack the chain at its base}
12. Ng5 Nf6 13. f4 (13. Qb3 h6 14. Ne6 Bxe6 15. dxe6 fxe4 $14) 13... Nxe4 14.
Ngxe4 fxe4 15. Nxe4 (15. g4 $5 $11 {looks like a viable alternative}) 15... Nf5
$17 16. Bc1 exf4 17. Rxf4 Bh6 {Black threatens to win material: Bh6xf4} (17...
Qe7 $142 $5 18. Bd3 Bd7 $17) 18. Rf3 Bxc1 19. Rxc1 {Black has a cramped
position} Qe7 20. Qd3 Bd7 21. b3 {Consolidates a4} (21. Re1 Bxa4 22. g4 Rae8
$17) 21... Rae8 $17 22. Nc3 Qg5 {Black threatens to win material: Qg5xc1} (
22... Ne3 $142 $5 23. Rxf8+ Rxf8 $17) 23. Rcf1 $15 Ne3 (23... Nh4 24. Rxf8+
Rxf8 25. Rxf8+ Kxf8 26. g4 $11) 24. Rxf8+ $11 Rxf8 25. Rxf8+ Kxf8 {Black has a
mate threat} 26. Bf3 Bxh3 {[%cal Re3g2,Rg5g2,Rh3g2,Gf3g2,Gg1g2] Will g2 fall?}
27. Qd2 Bd7 $4 {with this move Black loses his initiative} (27... Qf4 28. Ne2
Qg5 29. Nc3 $11) 28. Ne4 $4 {ruins a clearly superior position} (28. Nd1 $142
$18 {White has a promising position}) 28... Qf4 $15 29. g3 $4 (29. c5 h5 $11)
29... Qh6 (29... Qxf3 $142 {and Black has triumphed} 30. Qf2 Qxf2+ 31. Kxf2 Nc2
$19) 30. Nf6 {White threatens to win material: Nf6xd7} Bh3 31. g4 $2 (31. c5
Ng4 (31... dxc5 $143 32. d6 cxd6 33. Qxd6+ Kf7 34. Ne4 $16) 32. Qxh6+ Nxh6 33.
cxd6 cxd6 34. Nxh7+ Kg7 $15) 31... Kg7 $4 {Black threatens to win material:
Kg7xf6. forfeits the advantage} (31... Qf4 32. Qf2 Kg7 33. Ne8+ Kf7 34. Nxc7
Nxg4 35. Bxg4 Qxf2+ 36. Kxf2 Bxg4 37. b4 $19) 32. Ne8+ $4 {allows the opponent
back into the game} (32. Qd4 $142 {would be a reprieve} Kf7 33. Qe4 Kxf6 34.
Qe6+ Kg7 35. Qd7+ Kg8 36. Qe6+ Kf8 37. Qc8+ Ke7 38. Qe6+ Kd8 39. Qg8+ Kd7 40.
Qe6+ Kd8 41. Qg8+ Kd7 42. Qe6+ Kd8 $11) 32... Kf7 $19 33. Nxc7 Qf4 34. Qf2 Nxg4
35. Bxg4 Qxf2+ 36. Kxf2 Bxg4 37. b4 h5 38. c5 Ke7 (38... dxc5 $142 $5 39. bxc5
Bd7 $19) 39. c6 $17 bxc6 (39... Kd8 40. Ne6+ Kc8 41. cxb7+ Kxb7 42. a5 $17) 40.
dxc6 {White has a new passed pawn: c6. Black has a new passed pawn: d6} Kd8 41.
Nxa6 Bd1 42. c7+ $4 (42. a5 $142 {this is the best way to fight back} Ba4 43.
Nb8 $15) 42... Kc8 $19 43. b5 Bxa4 44. b6 Bd7 45. Nb4 (45. Nb8 Bh3 46. Nc6 Kb7
$19) 45... Kb7 46. Nd5 Bc6 {Black threatens to win material: Bc6xd5} (46... h4
$142 $19 {it becomes clear that Black will call all the shots}) 47. Ne7 $11 {
White has a mate threat} Bd7 48. Kf3 $4 {releasing the pressure on the opponent
} (48. Nd5 h4 $19) 48... h4 (48... g5 $142 $19 {and Black wins}) 49. Nxg6 $11
Kxb6 50. Nxh4 Kxc7 51. Ke4 Kc6 52. Kd4 Bh3 53. Ng6 Bg2 54. Nh4 1/2-1/2

[Event "SapporoSummer2022"]
[Site "?"]
[Date "2022.07.18"]
[Round "5.4"]
[White "Nakamura, Mitsuru"]
[Black "Fujii, Nathan"]
[Result "1-0"]
[ECO "B31"]
[WhiteElo "1355"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "79"]
[SourceVersionDate "2022.07.18"]

{[%mdl 8256] B31: Sicilian: 2...Nc6 3 Bb5 g6} 1. e4 c5 2. Nf3 Nc6 3. Bb5 e6 4.
O-O Nge7 5. Re1 g6 6. c3 Bg7 7. d4 cxd4 8. cxd4 d5 {Black has a cramped
position.} (8... Qb6 9. Bxc6 (9. Na3 d5 10. exd5 Nxd5 11. Nc4 Qc7 12. Bg5 O-O
13. Rc1 Nce7 14. Ba4 a6 15. Bb3 b5 16. Nce5 Qd6 17. Nd3 Nf5 18. Nc5 h6 19. Be3
Rb8 20. Ne4 Ndxe3 21. fxe3 Qb6 22. Nc5 Rd8 23. Qe2 Bb7 {Nanu,C (2507)-Grecescu,
G (2383) Eforie Nord 2007 1/2-1/2 (42)}) 9... bxc6 10. b3 d5 11. Nc3 Qa5 12.
Bd2 dxe4 13. Nxe4 Qd8 14. Bb4 O-O 15. Ne5 f6 16. Nf3 a5 17. Ba3 Ra7 18. Nd6 Bd7
19. Bc5 Ra8 20. Nb7 Qe8 21. Qd2 a4 22. bxa4 Rxa4 23. Qc2 {Kuzmin,G (2560)
-Kurajica,B (2490) Yerevan 1971 1-0 (37)}) 9. Bg5 $146 (9. e5 O-O 10. Nc3 h6
11. b3 Bd7 12. Ba3 Re8 13. Qd2 Qa5 14. Bc5 Nf5 15. Bd3 b6 16. b4 Nxb4 17. Bxf5
gxf5 18. Bd6 Rac8 19. Re3 f4 20. Ree1 Nc2 21. Qxc2 Qxc3 22. Qe2 Rc4 23. a4 Rec8
{Blees,A (2389)-Van der Weide,K (2467) Amsterdam 2000 1/2-1/2 (49)}) (9. Bxc6+
bxc6 10. e5 O-O 11. Nc3 Qc7 12. Na4 Bb7 13. b3 Rfe8 14. Bg5 Nc8 15. Qd2 Nb6 16.
Nc5 a5 17. Bh6 a4 18. b4 Ba6 19. a3 Bb5 20. h4 Nd7 21. Nxd7 Qxd7 22. Nh2 Qe7
23. Bxg7 Kxg7 {Kalinitschew,S (2491)-Bartels,H (2170) Bad Wiessee 2000 1-0 (41)
}) 9... h6 (9... dxe4 10. Rxe4 O-O 11. Nc3 $11) 10. Bh4 (10. Bxe7 $142 $5 Kxe7
11. exd5 Nxd4 12. Nc3 Nxb5 13. Nxb5 $16) 10... O-O (10... dxe4 11. Bxe7 (11.
Rxe4 $2 g5 $19) 11... Kxe7 12. Rxe4 Nxd4 13. Nxd4 $11) 11. Nc3 (11. exd5 Qxd5
12. Nc3 Qd7 $14) 11... Qc7 (11... g5 $5 {is worth consideration} 12. exd5 Nxd4
13. Nxd4 gxh4 $15) 12. Bg3 {White threatens to win material: Bg3xc7} Qd8 13.
Rc1 (13. exd5 $5 exd5 14. Ne5 $14) 13... dxe4 $11 14. Rxe4 {Black has a
cramped position} (14. Nxe4 f5 (14... Nxd4 $143 15. Nxd4 a6 16. Ba4 $16) 15.
Nc5 f4 $11) 14... Nf5 {[%cal Rc6d4,Rd8d4,Rf5d4,Rg7d4,Gd1d4,Ge4d4,Gf3d4]
Increasing the pressure on the isolated pawn on d4} (14... f5 $142 $5 15. Re1
f4 $15) 15. Bxc6 $11 bxc6 {Black has the pair of bishops} 16. Be5 Bb7 (16... f6
17. Bg3 $11) 17. Bxg7 $14 Kxg7 18. Re1 Qc7 19. Ne4 Qb6 (19... Rad8 20. g4 Ne7
21. Rc3 $16) 20. b3 (20. g4 $5 Ne7 21. Ne5 $16) 20... Rad8 $14 21. Nc5 {
A classical outpost} Qc7 (21... Rd5 $142 $5 $14 {is an interesting alternative}
) 22. Rxe6 $1 $16 {registering a claim to victory.} Bc8 (22... fxe6 23. Nxe6+
Kf6 (23... Kf7 24. Nxc7 {Combination}) (23... Kg8 24. Nxc7 {Combination}) (
23... Kh7 24. Nxc7 {Combination}) (23... Kh8 24. Nxc7 {Combination}) 24. Nxc7 {
Combination}) 23. Re4 Nd6 24. Re1 Bf5 (24... f6 25. Qd2 $16) 25. Nh4 (25. h3
Bc8 $18) 25... Bc8 26. b4 (26. h3 Rfe8 $16) 26... Nb7 (26... Nb5 27. Rc4 $16)
27. Qb3 (27. Nf3 Nxc5 28. Rxc5 Qd6 $18) 27... Nxc5 28. dxc5 Be6 29. Qc3+ Kg8 $4
{a blunder in a bad position} (29... Kh7 $142 30. a4 a6 $16) 30. Qf6 $18 Bd5 (
30... Rd2 {is the last straw} 31. Nxg6 $1 {Deflection: e6} fxg6 32. Qxg6+ Qg7
33. Qxe6+ Qf7 34. Qxc6 Rxf2 $18) 31. Re7 Rd7 (31... Qxe7 {doesn't improve
anything} 32. Qxe7 Rde8 33. Qxa7 Re4 $18) 32. Rxd7 (32. Nxg6 Qe5 33. Qxe5 f6
34. Qf5 Rb7 35. Rxb7 Rb8 36. Ne7+ Kf7 37. Qg6+ Kf8 38. Rxb8+ Kxe7 39. Qe8#)
32... Qxd7 $14 33. Rd1 Qg4 {Black has a mate threat} 34. Rd4 {White threatens
to win material: Rd4xg4} Qe2 (34... Re8 35. h3 (35. Rxg4 $4 {mating in 1} Re1#)
35... Re1+ 36. Kh2 $11) 35. h3 $16 Qxa2 36. Nxg6 $4 {White loses the upper hand
} (36. Kh2 $142 Qb1 37. Rg4 $16) 36... fxg6 $4 {a weak move, ruining a winning
position} (36... Qb1+ 37. Rd1 Qxg6 (37... Qxd1+ $6 38. Kh2 fxg6 39. Qxg6+ Kh8
40. Qxh6+ Kg8 41. Qg6+ Kh8 42. Qh6+ Kg8 43. Qg6+ Kh8 44. Qh6+ $11) (37... fxg6
$4 38. Qxf8+ (38. Rxb1 $2 {may look interesting but causes some serious
problems} Rxf6 39. b5 cxb5 $19) 38... Kxf8 39. Rxb1 $18) 38. Qxg6+ fxg6 $19)
37. Qxg6+ Kh8 38. Qxh6+ Kg8 39. Qg6+ Kh8 40. Rh4# 1-0

[Event "SapporoSummer2022"]
[Site "?"]
[Date "2022.07.18"]
[Round "5.5"]
[White "Ito, Katsuhide"]
[Black "Nishimori, Toshiyuki"]
[Result "0-1"]
[ECO "B33"]
[WhiteElo "1296"]
[BlackElo "1684"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "86"]
[SourceVersionDate "2022.07.18"]

{[%mdl 8256] B33: Sicilian: Pelikan and Sveshnikov Variations} 1. e4 c5 2. Nf3
Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Bxf6
gxf6 10. Nd5 f5 11. Bd3 Be6 12. Qh5 f4 13. O-O Bg7 14. c3 O-O 15. Nc2 (15. g4
Kh8 16. Kh1 Rg8 17. g5 Ne7 18. f3 Bf8 19. Rad1 Rg7 20. Bc2 Ng8 21. Rg1 Be7 22.
h4 Rg6 23. Bb3 Rb8 24. Rd2 a5 25. c4 a4 26. Bc2 bxc4 27. Nxc4 Bd7 28. Rgd1 Bxg5
29. hxg5 Rxg5 {Polgar,J (2630)-Nunn,J (2605) Monte Carlo 1994 1-0 (34)}) 15...
f6 $146 (15... Ra7 16. a4 bxa4 17. Rxa4 a5 18. b4 f5 19. c4 f3 20. Qxf3 f4 21.
b5 Ne7 22. b6 Rb7 23. Rxa5 Ng6 24. Qh5 Bf7 25. Qh3 Qg5 26. Rfa1 Bxd5 27. exd5
e4 28. Bxe4 Bxa1 29. Qe6+ Kh8 30. Bxg6 {Kruszynski,W (2270)-Bielczyk,J (2200)
Augustow 1975 1/2-1/2 (45)}) (15... Kh8 16. a4 (16. Rfd1 Rg8 17. a4 bxa4 18.
Rxa4 Bf8 19. h3 Rg5 20. Qf3 Bxd5 21. exd5 Ne7 22. Nb4 f5 23. Nc6 Qd7 24. Nxe7
Bxe7 25. Rxa6 Rag8 26. Bf1 Bf6 27. Rda1 e4 28. Qxf4 Qg7 29. g3 Be5 30. Qh4 e3 {
Szelag,M (2484)-Timoshenko,G (2560) Cappelle-la-Grande 2008 0-1 (36)}) 16...
bxa4 17. Rxa4 a5 18. Na3 (18. Bb5 Ne7 19. Rfa1 Bxd5 20. exd5 Nxd5 21. Qf3 Nc7
22. Rxa5 Rb8 23. Qc6 f5 24. Nb4 e4 25. Bf1 Rc8 26. Rd1 Ne6 27. Qd5 Nc5 28. Ra7
Qg5 29. Nc6 e3 30. f3 Qh4 31. Nd4 Qf2+ 32. Kh1 Rce8 {Matta,V (2257)-Stany,G 
(2334) Bhiwani 2010 1/2-1/2 (49)}) 18... f5 19. Nc4 Bf7 20. Qh3 Bxd5 21. exd5
Ne7 22. Rfa1 Rf6 23. Nxa5 e4 24. Nc6 Rxa4 25. Rxa4 Qe8 26. Bb5 Nxd5 27. Nd4 Qb8
28. b4 Ne7 29. Qh4 Qc8 30. c4 {Perez Gormaz,M (2216)-Zambrana,O (2502)
Montevideo 2011 0-1 (74)}) (15... Ne7 $5 $14) 16. a4 $16 bxa4 17. Rxa4 a5 18.
b4 axb4 19. Rxa8 Qxa8 20. Ra1 {White threatens to win material: Ra1xa8} (20.
cxb4 f5 21. Nc7 Bf7 22. Qxf5 Qc8 23. Qxc8 Rxc8 $16) 20... Qb8 (20... Qb7 21.
Ra6 Ne7 22. Ncxb4 $16 (22. Rxd6 $6 Bf7 23. Qh3 bxc3 $11)) 21. cxb4 (21. Ncxb4
Bf7 22. Qf5 Nxb4 23. cxb4 Re8 $16) 21... Bf7 (21... f5 22. Bc4 Kh8 23. b5 $14)
22. Qg4 (22. Qf5 Qc8 23. Nxf6+ Bxf6 24. Qxf6 Nd4 25. Nxd4 Qc3 $18) 22... Qd8 (
22... f5 23. Nf6+ Kh8 24. Qxf5 $14) 23. b5 Ne7 (23... f5 $142 24. Qxf5 Bxd5 $16
) 24. b6 $4 {gives the opponent counterplay} (24. Nxf6+ $142 {White has a
promising position} Kh8 25. Nd7 $16) 24... Nxd5 (24... Bxd5 $142 25. exd5 f5
$17) 25. b7 $4 (25. exd5 Qxb6 26. Qf5 Bg6 (26... Bxd5 $4 {Taking that pawn is
naive} 27. Qxh7+ Kf7 28. Bg6+ Ke7 29. Nb4 $18) 27. Qe6+ Kh8 28. Bxg6 hxg6 $11)
25... Qb6 $4 {Black threatens to win material: Qb6xb7. a transit from better
to worse} (25... f5 {and Black can already relax} 26. Qd1 Nc3 27. Qe1 $19) 26.
Qd7 $2 (26. exd5 $142 {would keep White in the game} Qxb7 27. Qf5 $15) 26...
Nc7 $19 27. Qc8 $4 {sad, but how else could White save the game?} (27. Na3 Be6
28. Qe7 Qxb7 29. Nb5 $19) 27... Be6 28. Qa8 (28. b8=Q {otherwise it's curtains
at once} Qxb8 29. Qxb8 Rxb8 30. f3 $19) 28... Nxa8 29. Na3 (29. bxa8=Q {
is one last hope} Rxa8 30. Rxa8+ Bf8 31. Ne1 $19) 29... Qxb7 30. Rb1 Qc7 31.
Nb5 Qa5 (31... Qc5 $142 {seems even better} 32. Ra1 $19) 32. Nxd6 Qc3 33. Bf1
Rd8 34. Nf5 Bxf5 35. exf5 Nc7 36. Be2 Nd5 (36... Qc2 37. Ra1 Qxe2 38. h3 Rd2
39. Rf1 e4 40. h4 e3 41. g3 exf2+ 42. Kg2 Qg4 43. Rxf2 Qxg3+ 44. Kh1 Qxf2 45.
h5 Qg2#) 37. Rd1 Bf8 38. Bf3 (38. g3 {does not solve anything} Ne3 $1 {Mate
attack} 39. Rc1 Qxc1+ 40. Bd1 Qxd1#) 38... Qc5 (38... Ne3 39. Rb1 Rb8 40. Rf1
Nxf1 41. Bd5+ Kg7 42. g3 Ne3 43. fxe3 Rb2 44. Bg2 Qd2 45. Bh3 Qxh2+ 46. Kf1
Qf2#) 39. g4 fxg3 40. hxg3 Rd6 41. Kg2 Ne3+ $1 {Double attack: d1/g2} 42. fxe3
Qc2+ 43. Kh3 (43. Kg1 {hardly improves anything} Rxd1+ 44. Bxd1 Qxd1+ 45. Kf2
Bc5 46. g4 Qxg4 47. Ke1 Bxe3 48. Kf1 Qf3+ 49. Ke1 Qg2 50. Kd1 Qd2#) 43... Rxd1
(43... Rxd1 44. g4 Rd2 45. Bd5+ Rxd5 46. Kg3 Rd2 47. g5 Rh2 48. gxf6 Qg2#) 0-1

