[Event "SapporoSummer2017"]
[Site "?"]
[Date "2017.07.29"]
[Round "1.1"]
[White "Kanamaru, Tomoji"]
[Black "Sugimoto, Koichi"]
[Result "0-1"]
[ECO "B01"]
[WhiteElo "1590"]
[BlackElo "1929"]
[Annotator "Fritz 15 (30s)"]
[PlyCount "80"]

{B01: Scandinavian Defence} 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6 4. Be2 Nf6 5. Nf3
Nc6 (5... a6 6. d3 Nc6 7. Ne4 Nxe4 8. dxe4 e5 9. c3 Qg6 10. O-O Be7 11. Qc2 Bh3
12. Ne1 Bc5 13. Kh1 Be6 14. f4 exf4 15. Bxf4 O-O-O 16. Nf3 Rhe8 17. b4 Ba7 18.
Rae1 Bg4 19. Nh4 Qe6 20. Bxg4 {Krapivin,A (2445)-Kovalenko,I (2587) Moscow
2012 1-0 (40)}) (5... c6 6. O-O Bg4 7. h3 Bxf3 8. Bxf3 Nbd7 9. d4 e6 10. Bg5
Qc7 11. Qd3 Be7 12. Bh4 O-O 13. Ne4 Qd8 14. Bg3 Nxe4 15. Bxe4 Nf6 16. Bf3 Bd6
17. Bh4 Be7 18. Bg5 Nd5 19. Bd2 Bf6 20. c4 {Bilguun,S (2269)-Segarra,R (2343)
Manila 2013 0-1 (50)}) 6. d4 $146 {Black's piece can't move: f8} (6. d3 Bg4 7.
O-O e6 8. Bg5 Be7 9. Bh4 O-O 10. Bg3 Qd7 11. Ne5 Nxe5 12. Bxe5 Bxe2 13. Qxe2 c6
14. Qf3 Nd5 15. Nxd5 cxd5 16. c4 Rfd8 17. Rac1 Bf8 18. Qg3 Rac8 19. Bf6 Re8 20.
b3 Rc6 {Marinsek,T (2195)-Nikolov,S (2415) Pula 1998 1/2-1/2 (103)}) (6. Nb5
Qd8 7. d4 a6 8. Nc3 Bf5 9. Bf4 e6 10. O-O Be7 11. h3 O-O 12. Re1 Nb4 13. Rc1 c5
14. Be3 Qc7 15. a3 Nbd5 16. Nxd5 Nxd5 17. Bd3 Bg6 18. Bxg6 hxg6 19. c4 Nxe3 20.
fxe3 Bf6 {Kosanski,S (2365)-Nikolov,S (2415) Radenci 1998 1-0 (60)}) 6... Bf5 (
6... a6 7. a3 $14) 7. O-O (7. Nb5 Qd8 8. d5 Nb4 $14) 7... Nb4 (7... O-O-O $5
$11) 8. Nb5 Qb6 9. c3 Nc2 (9... c6 $5 10. cxb4 cxb5 $16) 10. Bf4 Nd5 11. Bg3 (
11. Nxc7+ Nxc7 12. Bxc7 Qxc7 13. Bb5+ Kd8 $16) 11... a6 (11... Nxa1 $142 $5 {
and Black hangs on} 12. Qxa1 c6 $15) 12. Nxc7+ $14 Nxc7 {Black wins a piece}
13. Rc1 e6 14. Bd3 Bxd3 15. Qxd3 Nxd4 16. Qxd4 (16. Ne5 Nd5 17. cxd4 Be7 $14)
16... Qxd4 $11 17. Nxd4 Nd5 18. Rfd1 Be7 19. c4 {White threatens to win
material: c4xd5} Nf6 20. c5 Ne4 21. b4 (21. c6 $5 bxc6 22. Nxc6 Nxg3 23. hxg3
$14) 21... Nxg3 $11 22. hxg3 {White has new doubled pawns: g2+g3} Bg5 (22...
O-O-O 23. Kf1 $11) 23. c6 (23. f4 Be7 $14) 23... bxc6 (23... O-O-O 24. f4 Bf6
25. cxb7+ Kxb7 26. Nb3 Rxd1+ 27. Rxd1 $15) 24. Rxc6 (24. f4 c5 25. Nb3 Be7 26.
Nxc5 Bxc5+ 27. Rxc5 Ke7 $11) 24... O-O 25. Rd6 (25. Nb3 $5 {is an interesting
idea} Rfc8 26. Rxc8+ Rxc8 27. Rd6 $11) 25... Be7 $15 {Black threatens to win
material: Be7xd6} 26. Rd7 Bxb4 27. Nc6 Bc5 28. Rc1 {White threatens to win
material: Rc1xc5} Ba3 {Black threatens to win material: Ba3xc1} 29. Rc3 {
White threatens to win material: Rc3xa3} Bb2 {Black threatens to win material:
Bb2xc3} 30. Rb3 {White threatens to win material: Rb3xb2} (30. Ne7+ Kh8 31.
Rcc7 Ba3 $11) 30... Bf6 $15 31. Ra3 g6 32. Na7 (32. g4 $5 $15 {should be
investigated more closely}) 32... Rfb8 $17 33. Rxa6 Rb1+ 34. Kh2 Rf1 35. f3 $4
{White crumbles in face of a dire situation} (35. Rb6 $142 Rxf2 36. a4 $17)
35... Rb8 $19 36. a4 (36. Rxf7 Rbb1 37. Kh3 $19) 36... Rbb1 37. Kh3 h5 38. g4
Rh1+ 39. Kg3 Be5+ (39... h4+ 40. Kf4 Rhe1 41. Rxe6 fxe6 42. Rg7+ Kxg7 43. Nc6
g5#) 40. Kf2 Bf4 (40... Bf4 41. Rxe6 fxe6 42. Rd8+ Kf7 43. Ke2 Rb2+ 44. Kd3
Rd1+ 45. Kc3 Be5+ 46. Rd4 Bxd4+ 47. Kc4 Bxa7 48. gxh5 Bd4 49. f4 Bf6 50. hxg6+
Ke7 51. g4 Rc1+ 52. Kd3 Rc3+ 53. Ke4 Re2#) (40... Rbe1 41. Rd8+ Kg7 42. g3 h4
43. Rg8+ Kxg8 44. gxh4 Rhf1+ 45. Kg2 Rg1+ 46. Kh3 Rh1+ 47. Kg2 Rh2#) 0-1

[Event "SapporoSummer2017"]
[Site "?"]
[Date "2017.07.29"]
[Round "1.2"]
[White "Yoshii, Yukihiko"]
[Black "Sato, Takeru"]
[Result "1-0"]
[ECO "A40"]
[WhiteElo "1867"]
[BlackElo "1349"]
[Annotator "Fritz 15 (30s)"]
[PlyCount "95"]

{A40: Unusual replies to 1 d4} 1. c4 b6 2. d4 Bb7 3. Nc3 e6 4. e4 Bb4 5. Bd3
Ne7 (5... Nc6 6. Nf3 d6 7. Bd2 e5 8. d5 Bxc3 9. Bxc3 Nce7 10. b4 Bc8 11. c5 Nf6
12. a4 O-O 13. O-O Ng6 14. a5 bxc5 15. bxc5 Nf4 16. h3 N6h5 17. Bc2 Qf6 18. Kh2
Nxg2 19. Kxg2 Nf4+ 20. Kh1 {Ljubojevic,L (2571)-Speelman,J (2507) Leon 2011 1/
2-1/2 (47)}) 6. Nf3 O-O $146 (6... f5 7. exf5 Nxf5 8. Bxf5 exf5 9. O-O O-O 10.
Bf4 Bxc3 11. bxc3 h6 12. Re1 d6 13. d5 Nd7 14. Nd4 Nc5 15. Qh5 Qf6 16. Ne6 Nxe6
17. Rxe6 Qf7 18. Qh4 Rae8 19. Rae1 Rxe6 20. dxe6 Qg6 21. Bg3 {Erdos,B (2208)
-Gara,T (2375) Hungary 2011 0-1 (47)}) 7. O-O c6 {Covers b5+d5} (7... Bxc3 8.
bxc3 d6 9. e5 $14) 8. e5 {White gains space} h6 {Prevents intrusion on g5} 9.
Ne4 {Black has a cramped position} d5 {Black threatens to win material: d5xe4}
10. Ng3 (10. a3 dxe4 11. Bxe4 Bd6 12. exd6 Qxd6 $14) 10... dxc4 11. Bxc4 c5 12.
a3 {White threatens to win material: a3xb4} Ba5 13. Be3 Ba6 (13... Nd7 $5 $11 {
should be examined more closely}) 14. Bxa6 $16 Nxa6 15. Ne4 (15. Qe2 Nc7 $16)
15... Nf5 $14 16. dxc5 Nxe3 17. fxe3 Nxc5 $2 (17... Qxd1 $142 18. Raxd1 bxc5
$14) 18. Nd6 $18 b5 19. b4 Bb6 20. bxc5 Bxc5 21. Re1 Qb6 22. Qb3 a6 23. Ne4 Be7
24. Rad1 (24. a4 Rad8 $18) 24... Qa5 (24... Rfd8 $16) 25. Nd6 $18 Rab8 26. Nd4
Qb6 27. Nxe6 (27. Rc1 $142 {might be the shorter path} Bxd6 28. exd6 Qxd6 29.
Rc6 $18) 27... fxe6 $4 {terrible, but what else could Black do to save the
game?} (27... Bxd6 $142 28. Nxf8 Bxf8 $18) 28. Qxe6+ Kh8 29. Qxe7 Ra8 (29...
Kh7 {what else?} 30. Ne4 Qg6 31. Nf6+ Kh8 $18) 30. Nf7+ Kh7 (30... Kg8 31. Rd6
Qc5 32. Nxh6+ Kh8 $18) 31. Rd6 Qa5 32. Rf1 Rae8 33. Qd7 {[%cal Ye5e6] White
prepares the advance e6} (33. Rxh6+ gxh6 34. Qd6 Re6 35. Qxf8 Qd8 36. Qxd8 Re8
37. Qf6 a5 38. Qxh6+ Kg8 39. Qh8#) 33... Qxa3 34. Qf5+ (34. Rxh6+ gxh6 35. Qf5+
Kg7 36. Qf6+ Kh7 37. Qxh6+ Kg8 38. Qh8#) 34... Kg8 35. Qf4 (35. Nxh6+ Kh8 36.
Nf7+ Kg8 37. Qh5 Qxe3+ 38. Kh1 Qg1+ 39. Kxg1 Rxf7 40. Qxf7+ Kh7 41. Qg6+ Kg8
42. Rf7 a5 43. Qxg7#) 35... Qb3 (35... Qa4 36. Qf3 Qc4 37. Nxh6+ Kh8 38. Qxf8+
Rxf8 39. Rxf8+ Kh7 40. Nf7 g6 41. Ng5+ Kg7 42. Rff6 Qc1+ 43. Kf2 Qc2+ 44. Kf3
Kh6 45. Ne4 Kg7 46. Rxg6+ Kf7 47. Rdf6+ Ke8 48. Rg8+ Kd7 49. Rg7+ Ke8 50. Nd6+
Kd8 51. Rf8#) 36. e6 (36. Nxh6+ $142 {seems even better} Kh8 37. Qxf8+ Rxf8 38.
Rxf8+ Kh7 39. Nf5 $18) 36... Kh7 (36... a5 $18 {hoping against hope}) 37. Qe4+
Kg8 38. Nxh6+ $1 {final destruction} gxh6 (38... Kh8 {doesn't get the cat off
the tree} 39. Rxf8+ Rxf8 40. Nf7+ Kg8 41. Ng5 Rc8 42. Qh7+ Kf8 43. Qh8+ Ke7 44.
Rd7+ Kf6 45. Qxg7+ Kf5 46. Rf7+ Kg4 47. Nh7+ Kh4 48. Qg5#) 39. Rxf8+ Rxf8 40.
Qg6+ (40. e7 Qf7 41. Qg4+ Kh7 42. exf8=Q Qxf8 43. Rd7+ Kh8 44. Qg6 Qf1+ 45.
Kxf1 b4 46. Qg7#) 40... Kh8 41. Qxh6+ Kg8 42. Qg5+ Kh8 43. h3 Qb1+ (43... Qc2 {
cannot undo what has already been done} 44. Qh6+ Kg8 45. Rd7 Qf2+ 46. Kh2 Rf7
47. Qg5+ Kh7 48. e7 Qf6 49. e8=Q Qg6 50. Qxf7+ Qxf7 51. Rxf7+ Kh8 52. Qd8#) 44.
Kh2 Qe4 (44... Qh7 {doesn't change anything anymore} 45. e7 Re8 46. Rd4 b4 47.
Qf6+ Qg7 48. Rh4+ Kg8 49. Qe6+ Qf7 50. Rg4+ Kh8 51. Qxf7 a5 52. Rh4#) 45. e7
Rf7 (45... Re8 {does not help much} 46. Rh6+ Qh7 47. Qf6+ Kg8 48. Rg6+ Qxg6 49.
Qxg6+ Kh8 50. Qxe8+ Kg7 51. Qf8+ Kg6 52. e8=Q+ Kg5 53. Qf4#) 46. Rh6+ Rh7 47.
Qf6+ Kg8 48. Qf8# 1-0

[Event "SapporoSummer2017"]
[Site "?"]
[Date "2017.07.29"]
[Round "1.3"]
[White "Ito, Katsuhide"]
[Black "Watanabe, Katsumi"]
[Result "0-1"]
[ECO "C87"]
[WhiteElo "1301"]
[BlackElo "1695"]
[Annotator "Fritz 15 (30s)"]
[PlyCount "82"]

{C87: Closed Ruy Lopez: Steinitz-type lines after 6 Re1 d6} 1. e4 e5 2. Nf3 Nc6
3. Bb5 a6 4. Ba4 d6 5. c3 Bd7 6. O-O Nf6 7. Re1 Be7 (7... b5 8. Bc2 Bg4 9. h3
Bh5 10. d3 Be7 11. Nbd2 O-O 12. Nf1 d5 13. Ng3 Bg6 14. exd5 Qxd5 15. Nh4 Rad8
16. Ngf5 Rfe8 17. Bg5 Bf8 18. Bxf6 gxf6 19. Qg4 Kh8 20. Re3 Qd7 21. Rd1 Ne7 22.
d4 {Gagunashvili,M (2570)-Paichadze,L (2480) Tbilisi 2012 1-0 (66)}) 8. d4 (8.
d3 O-O 9. Nbd2 Qe8 10. Nf1 Kh8 11. Ng3 Bd8 12. h3 Ne7 13. Bc2 Nfg8 14. d4 f6
15. Nh4 g6 16. a3 Qf7 17. b4 Be6 18. Rf1 Qg7 19. Bb3 Bxb3 20. Qxb3 Nc6 21. Nf3
Qf7 22. Qd1 Re8 {Markovic,M (2460)-Dmitrovic,T (2273) Pozarevac 2012 1-0 (54)})
8... b5 {Black threatens to win material: b5xa4} 9. Bb3 $146 (9. Bc2 O-O 10.
Nbd2 (10. d5 Na5 11. Nbd2 c5 12. dxc6 Nxc6 13. Nf1 Re8 14. Bg5 Ng4 15. Qd2 Na5
16. b3 Qc7 17. Bxe7 Rxe7 18. Rac1 Rc8 19. Red1 Nb7 20. Bb1 Qb6 21. h3 Nf6 22.
Ne3 h6 23. Nh4 g6 24. c4 b4 {Kovalevskaya,E (2486)-Obukhov,A (2444) Samara
2002 0-1 (74)}) 10... Ne8 11. Nf1 Bf6 12. h3 h5 13. Ne3 g6 14. Nd5 Bg7 15. a4
Rb8 16. axb5 axb5 17. Bg5 f6 18. Be3 b4 19. dxe5 fxe5 20. Bg5 Nf6 21. Ba4 Kh8
22. cxb4 Nxb4 23. Bxf6 Bxf6 {Barczay,L (2370)-Farkas,G (2315) Eger 1986 1/2-1/2
}) 9... O-O 10. Nbd2 Bg4 11. h3 Bh5 12. Nf1 (12. Bd5 Qd7 $14) 12... h6 {
Controls g5} (12... Bxf3 13. Qxf3 exd4 14. Qd3 $11) 13. Ng3 $14 Bg6 14. Nh4 {
White threatens to win material: Nh4xg6} Bh7 15. Nhf5 Na5 16. Nxe7+ Qxe7 {
White has the pair of bishops} 17. Bc2 Kh8 18. b3 {Secures c4} Nc6 19. a4 Rab8
(19... exd4 $5 20. cxd4 Rfe8 $16) 20. d5 $16 Nd8 21. axb5 axb5 22. Ba3 Nd7 (
22... Qd7 23. Qd3 $16) 23. Bb4 Nb7 24. Bd3 Ndc5 (24... Nbc5 $5 $16) 25. Bxb5 f5
26. Bxc5 $4 {forfeits the advantage} (26. exf5 $142 {White clearly has the
better chances} Qf7 27. Re3 $16) 26... Nxc5 $11 27. Bc4 f4 {This push gains
space} 28. Nf5 Bxf5 (28... Qf6 29. f3 h5 30. b4 $11) 29. exf5 $14 Rxf5 30. b4
Nd7 31. Ra7 {White threatens to win material: Ra7xc7} (31. Bd3 Rff8 $14) 31...
Nb6 (31... Nf6 32. Qa1 $11) 32. Bb5 (32. Bd3 Rff8 $16) 32... Rbf8 (32... e4 33.
Bc6 $11) 33. c4 (33. Bd3 $5 R5f6 34. Qf3 $16) 33... f3 34. g3 Rg5 (34... Rh5
$142 35. Re3 e4 $11) 35. Rf1 $4 {White is ruining his position} (35. Re3 $142
$14 {would keep White alive}) 35... e4 $17 36. c5 $4 {another step towards the
grave} (36. Qd4 $142 e3 37. Ra3 $17) 36... dxc5 (36... Nxd5 $142 $5 {and Black
can already relax} 37. Kh2 e3 38. Re1 dxc5 39. Qc1 cxb4 40. Qc6 $19) 37. d6
Qxd6 (37... Qe6 38. Qxf3 exf3 39. Bc6 Qxh3 40. Bxf3 Rxf3 41. Ra8+ Nxa8 42. Ra1
Kh7 43. Rxa8 Rgxg3+ 44. fxg3 Rf1#) 38. bxc5 $4 {sad, but how else could White
save the game?} (38. Qxd6 $142 cxd6 39. Rb7 $19) 38... Qxc5 (38... Rxg3+ 39.
fxg3 Qxg3+ 40. Kh1 Qg2#) 39. Qb1 (39. Kh2 {there is nothing better in the
position} Rh5 40. Bd7 Nxd7 41. Qxd7 Qxa7 42. Qe7 $19) 39... Rxg3+ 40. Kh2 Rg2+
41. Kh1 Qf5 (41... Qf5 42. Bd7 Nxd7 43. Rxc7 Qxh3#) (41... Qe5 42. Bd7 Qh2#)
0-1

[Event "SapporoSummer2017"]
[Site "?"]
[Date "2017.07.29"]
[Round "2.1"]
[White "Sugimoto, Koichi"]
[Black "Yoshii, Yukihiko"]
[Result "1-0"]
[ECO "D56"]
[WhiteElo "1929"]
[BlackElo "1867"]
[Annotator "Fritz 15 (30s)"]
[PlyCount "143"]

{D56: Queen's Gambit Declined: Lasker Defence} 1. d4 d5 2. c4 e6 3. Nf3 Nf6 4.
Bg5 Be7 5. Nc3 h6 6. Bh4 O-O 7. e3 Nc6 (7... c6 8. Bd3 (8. cxd5 exd5 9. Bd3 Be6
10. h3 Nbd7 11. O-O Ne8 12. Bg3 Bd6 13. Ne5 Nxe5 14. dxe5 Bc7 15. e4 dxe4 16.
Nxe4 Qe7 17. Re1 Rd8 18. Qc2 Bf5 19. Nd6 Bxd3 20. Qxd3 Bb6 21. a4 Qe6 22. Qc3
Rd7 {Georgiev,V (2517)-Mamedjarova,Z (2349) Wijk aan Zee 2005 1-0 (35)}) 8...
dxc4 9. Bxc4 b5 10. Bd3 Bb7 11. O-O Nbd7 12. a3 a5 13. Qe2 b4 14. Na4 {1/2-1/2
(14) Moiseenko,A (2627)-Kharlov,A (2581) Istanbul 2003}) 8. Rc1 $146 (8. Bd3
Nb4 9. Be2 dxc4 10. Bxc4 c5 11. O-O cxd4 12. Qxd4 Qa5 13. Qe5 Nc6 14. Qxa5 Nxa5
15. Bd3 Nc6 16. Rfd1 Rd8 17. Bb5 Bd7 18. h3 Be8 19. Kf1 Rxd1+ 20. Rxd1 Rd8 21.
Rxd8 Bxd8 22. a3 Kf8 {Sanguineti,R (2530)-Naranja,R (2395) Nice 1974 1/2-1/2})
8... a6 {Secures b5} 9. a3 {Consolidates b4} dxc4 10. Bxc4 Nd5 11. Bg3 Nxc3 12.
Rxc3 Bd6 13. O-O Bxg3 14. hxg3 Qf6 (14... Ne7 15. g4 $14) 15. Qc2 Rd8 16. Rd1
Rd6 17. Ba2 Bd7 (17... Rd8 18. Rc5 $16) 18. Rc5 (18. Nd2 Qd8 19. Ne4 Rd5 $18)
18... Rd8 (18... Qe7 19. Nd2 $16) 19. Rh5 (19. e4 e5 20. Nxe5 Be6 21. Nxc6 Rxc6
22. Rxc6 bxc6 $16) 19... Qg6 (19... g5 $5 {deserves consideration} 20. Rf1 e5
21. Nxg5 hxg5 22. Qh7+ Kf8 $14) 20. Qxg6 $16 fxg6 21. Rc5 Kf8 22. Rdc1 Ke7 23.
Nd2 Be8 24. Ne4 R6d7 25. R5c3 Rb8 26. b4 Rdd8 27. Nc5 Bd7 (27... Rd6 28. f4 $16
) 28. Bb1 Be8 (28... Na7 $5 $16) 29. Be4 $18 Rd6 (29... a5 30. Bxc6 bxc6 31.
bxa5 Rb5 $18) 30. Bf3 $4 {there were better ways to keep up the pressure} (30.
Nxa6 Rc8 31. Nc5 Rb8 $18) 30... g5 $2 (30... Nd8 31. g4 $16) 31. Nb3 (31. Nxa6
$142 $5 bxa6 32. Bxc6 Bxc6 33. Rxc6 $18) 31... Bd7 32. Rc4 g6 33. a4 (33. Nc5
Nd8 $18) 33... Kf6 (33... h5 34. Nc5 $16) 34. Nc5 $18 Ke7 35. b5 (35. Nxd7 $5
Rxd7 36. Bxc6 bxc6 37. Rxc6 Rxb4 38. Rxa6 Rb6 $18) 35... axb5 $16 36. axb5 Na5
(36... Na7 $142 $5 37. R4c2 Nxb5 38. Nxb7 Rb6 $16) 37. Nxd7 $18 Rxd7 38. Rxc7
b6 39. Rc8 Rd8 (39... Rxc8 40. Rxc8 h5 41. Rb8 $18) 40. R1c7+ Kf6 41. Rxb8 Rxb8
42. Kf1 (42. g4 Rf8 $18) 42... h5 43. g4 h4 (43... Rh8 44. Ke2 $18) 44. Ke2 Nb3
(44... Rd8 $142 $18) 45. Kd3 Na5 46. e4 (46. Bc6 $142 $5 {keeps an even firmer
grip} Rf8 $18) 46... e5 47. d5 Rd8 (47... Rb7 48. Rc8 $16) 48. Bd1 $18 Rd6 49.
Rh7 (49. Ba4 Rd8 $18) 49... Rd8 50. f4 (50. Ra7 $5 Rc8 $18) 50... gxf4 $16 51.
Rxh4 (51. g5+ $142 Kxg5 52. Re7 $16) 51... Kg5 $4 {letting the wind out of his
own sails} (51... Nb7 $142 {the rescuing straw} 52. Bf3 Nc5+ 53. Kc3 Ra8 $11)
52. Rh7 $18 Rd6 (52... Re8 53. Rf7 $18) 53. Re7 (53. Rf7 $5 {makes it even
easier for White} Kh4 54. Re7 Kg3 55. Rxe5 Kxg2 $18) 53... Kf6 54. Re8 Nb7 55.
g5+ $1 {Deflection: e5} Kf7 (55... Kxg5 56. Rxe5+ {Deflection}) 56. Rxe5 Nc5+
57. Kd4 Nd7 $4 {Black falls apart} (57... Rd7 $18) 58. Re6 $1 {a beautiful,
forced end to the game} Rxe6 59. dxe6+ Kxe6 (59... Ke8 {is not the saving move}
60. exd7+ Kxd7 61. Bg4+ Kd8 62. Kd5 f3 63. gxf3 Ke7 64. e5 Kf8 65. Kd6 Ke8 66.
e6 Kf8 67. Kd7 Kg7 68. e7 Kg8 69. e8=Q+ Kg7 70. Be6 Kh7 71. Qg8#) 60. Bg4+ Kd6
(60... Kf7 {a fruitless try to alter the course of the game} 61. Bxd7 f3 62.
gxf3 Ke7 63. Bh3 Ke8 64. e5 Ke7 65. Kd5 Ke8 66. Kd6 Kf8 67. e6 Kg8 68. e7 Kf7
69. Kd7 Kg8 70. e8=Q+ Kh7 71. Be6 Kg7 72. Qg8#) 61. Bxd7 Kxd7 62. Ke5 Ke7 63.
Kxf4 Ke6 64. Ke3 Ke5 (64... Kf7 {does not improve anything} 65. e5 Ke7 66. Kd4
Ke6 67. Ke4 Kf7 68. Kd5 Ke7 69. e6 Ke8 70. Kd6 Kf8 71. g4 Kg7 72. e7 Kg8 73.
e8=Q+ Kh7 74. Qe7+ Kg8 75. Ke6 Kh8 76. Kf6 Kg8 77. Qg7#) 65. g3 Ke6 66. Kd4 Kd6
67. e5+ Ke6 68. Ke4 Ke7 69. Kd5 Kd7 70. e6+ Ke7 (70... Kc7 {doesn't get the
bull off the ice} 71. Ke5 Kc8 72. Kd6 Kd8 73. e7+ Ke8 74. g4 Kf7 75. Kd7 Kg8
76. e8=Q+ Kg7 77. Ke7 Kh7 78. Kf8 Kh8 79. Kf7+ Kh7 80. Qg8#) 71. Ke5 Ke8 72.
Kf6 (72. Kf6 Kf8 73. Kxg6 Ke7 74. Kf5 Kd8 75. Kf6 Kc7 76. Ke5 Kb7 77. e7 Ka7
78. e8=Q Kb7 79. Qf7+ Kc8 80. Kd6 Kb8 81. Kc6 Kc8 82. Qc7#) 1-0

[Event "SapporoSummer2017"]
[Site "?"]
[Date "2017.07.29"]
[Round "2.2"]
[White "Watanabe, Katsumi"]
[Black "Kanamaru, Tomoji"]
[Result "0-1"]
[ECO "A80"]
[WhiteElo "1695"]
[BlackElo "1590"]
[Annotator "Fritz 15 (30s)"]
[PlyCount "98"]

{A80: Dutch Defence: Unusual White second moves} 1. d4 f5 2. Nf3 Nf6 3. e3 d6
$146 {Covers e5} (3... e6 4. Be2 g6 (4... b6 5. b3 (5. O-O Bb7 6. c4 Bd6 7. Nc3
O-O 8. d5 Na6 9. Nd4 Nc5 10. Bf3 Nfe4 11. Bxe4 Nxe4 12. Nxe4 fxe4 13. dxe6 Qh4
14. g3 Qh3 15. exd7 c5 16. Nf5 Rf6 17. Nh4 g5 18. Qh5 gxh4 19. Qg5+ Kf7 {
Fries Nielsen,J (2310)-Kristiansen,J (2365) Aalborg 1979 0-1 (41)}) 5... Bb7 6.
Bb2 Bb4+ 7. c3 Be7 8. Nbd2 O-O 9. O-O c5 10. Ne5 d6 11. Nd3 Ne4 12. Nf4 Nxd2
13. Qxd2 Rf6 14. d5 e5 15. Ne6 Qc8 16. c4 Rg6 17. g3 Nd7 18. f4 Nf6 19. Bf3 {
Hesse,P (2350)-Piskov,Y (2500) Germany 1992 0-1 (57)}) 5. c4 Bg7 6. O-O O-O 7.
b4 d6 8. Nbd2 Nbd7 9. Bb2 Qe7 10. c5 a5 11. cxd6 cxd6 12. b5 Nb6 13. Nc4 Nxc4
14. Bxc4 d5 15. Bd3 Bd7 16. a4 Rfc8 17. Ne5 Be8 18. Qd2 {Nimzowitsch,
A-Tartakower,S Gothenburg 1920 1/2-1/2 (41)}) (3... g6 4. b3 Bg7 5. Bb2 O-O 6.
Be2 d6 7. O-O c6 8. Nbd2 h6 9. c4 Qe8 10. Qc2 Nbd7 11. e4 fxe4 12. Nxe4 Nxe4
13. Qxe4 Nf6 14. Qc2 Nh5 15. g3 Bf5 16. Bd3 Bxd3 17. Qxd3 g5 18. Rae1 {Hesse,P
(2330)-Heidrich,M (2385) Germany 1997 1/2-1/2}) 4. Bc4 e6 {Controls d5} 5. O-O
g6 6. Bb3 Bg7 7. Ng5 {White threatens to win material: Ng5xe6} Qe7 8. f4 O-O 9.
c4 h6 {Black threatens to win material: h6xg5} 10. Nf3 Kh7 11. Nc3 Nc6 12. d5 {
White threatens to win material: d5xc6} (12. a3 e5 $11) 12... Na5 $15 13. dxe6
(13. Bd2 $5 $15) 13... Bxe6 $17 14. Nd5 Bxd5 15. cxd5 Nxb3 16. Qxb3 c6 17. dxc6
bxc6 {Black has new hanging pawns: c6+d6} 18. Nd4 (18. Qc3 c5 $15) 18... Rfc8
19. Qc2 Qe8 20. Bd2 Ne4 21. Rae1 Nxd2 (21... Qg8 22. Nb3 $15) 22. Qxd2 $11 Rab8
23. b3 Qe4 24. Ne2 d5 25. Rf3 c5 26. Nc3 $2 (26. Rd1 Qe7 $15) 26... Bxc3 (26...
Qb4 $142 {Black missed this excellent chance} 27. Nb1 c4 28. Qxb4 Rxb4 29. bxc4
dxc4 $17) 27. Qxc3 $11 d4 (27... c4 $142 $5 $11 {is a viable option}) 28. exd4
$16 cxd4 29. Rxe4 (29. Qd2 $142 $5 Qd5 30. Rd3 $16) 29... dxc3 $11 {A double
rook endgame occured.} 30. Re7+ {White forks: a7} Kg8 31. Rf1 (31. Re1 c2 32.
Rc1 Rb6 $11) 31... c2 (31... Rb4 32. Re2 $15) 32. Rc1 $11 Rb4 (32... Rb5 $11)
33. g3 (33. Re2 Rxf4 34. Rexc2 Rxc2 35. Rxc2 Re4 $14) 33... Rd4 (33... Re4 $142
34. Rd7 Re2 $17) 34. Ree1 $4 {White has let it slip away} (34. Kf2 $142 {
would hold out} Rd1 35. Re1 $11) 34... Rd2 $19 35. h3 (35. b4 Kf7 36. Ra1 Re8
$19) 35... Rcd8 (35... Rc3 36. Re8+ Kf7 37. Ree1 Rxg3+ 38. Kf1 Rxh3 39. Kg1
Rg3+ 40. Kh1 $19) 36. Kf1 (36. g4 {is no salvation} R8d3 37. gxf5 Rg3+ 38. Kf1
Rxh3 $19) 36... Rh2 (36... R8d3 $142 {nails it down} 37. Re7 Rd1+ 38. Ke2 R3d2+
39. Ke3 $19) 37. Kg1 Rdd2 38. Re8+ Kf7 39. Rc8 Ke7 (39... Ke6 {seems even
better} 40. Rc4 $19) 40. Rc3 (40. a4 Rdg2+ 41. Kf1 Rf2+ 42. Kg1 Rhg2+ 43. Kh1
Rd2 $19) 40... Kd6 41. h4 (41. a3 Kd5 42. Rc4 Rdf2 $19) 41... h5 42. a4 (42.
Rc8 $19 {no good, but what else?}) 42... Kd5 43. a5 (43. Rc7 $19 {otherwise
it's curtains at once}) 43... Kd4 (43... Rhe2 44. Kf1 Kd4 45. R3xc2 Rf2+ 46.
Kg1 Rg2+ 47. Kf1 Rxc2 48. Rxc2 Rxc2 49. b4 Rb2 50. b5 Rxb5 51. Kf2 Rb2+ 52. Kf3
a6 53. g4 Ra2 54. gxh5 gxh5 55. Kg3 Ke3 56. Kh3 Kf2 57. Kh2 Ra3 58. Kh1 Rh3#)
44. Rc7 (44. Rf3 Rhe2 45. Rxc2 Rd1+ 46. Rf1 Rxf1+ 47. Kxf1 Rxc2 48. g4 Ke3 49.
g5 Rc1+ 50. Kg2 a6 51. b4 Rb1 52. Kg3 Rxb4 53. Kg2 Rb7 54. Kg3 Rb2 55. Kh3 Kf2
56. Kh2 Rb3 57. Kh1 Rh3#) 44... Rhe2 45. Kf1 Rh2 {Black has a mate threat} (
45... Kd3 46. Re1 Rxe1+ 47. Kxe1 Rd1+ 48. Kf2 c1=Q 49. Rxc1 Rxc1 50. Kf3 Ra1
51. b4 Rb1 52. b5 Rxb5 53. Kf2 Rb2+ 54. Kg1 Ke2 55. Kg2 a6 56. g4 Rb1 57. gxh5
gxh5 58. Kh3 Kf2 59. Kh2 Rc1 60. Kh3 Rh1#) 46. Kg1 Kd3 47. Rxa7 (47. Re1 Rdg2+
48. Kf1 Rh1+ 49. Kxg2 Rxe1 50. Rxc2 Kxc2 51. g4 Kxb3 52. Kg3 Re4 53. gxh5 gxh5
54. Kf3 Re1 55. Kf2 Re7 56. Kf1 Kc3 57. Kf2 Kd2 58. Kf3 Re3+ 59. Kf2 a6 60. Kg1
Ke2 61. Kg2 Rb3 62. Kg1 Kf3 63. Kh2 Kf2 64. Kh1 Rh3#) 47... Rhe2 48. Rd7+ Kc3
49. Rc7+ Kb2 (49... Kb2 50. R7xc2+ Rxc2 51. Rxc2+ Rxc2 52. b4 Kb3 53. b5 Kb4
54. g4 Kxa5 55. b6 Kxb6 56. gxh5 gxh5 57. Kf1 Kb5 58. Kg1 Kc4 59. Kf1 Kd3 60.
Ke1 Ra2 61. Kf1 Ke3 62. Kg1 Kf3 63. Kh1 Kg3 64. Kg1 Ra1#) 0-1

[Event "SapporoSummer2017"]
[Site "?"]
[Date "2017.07.29"]
[Round "2.3"]
[White "Sato, Takeru"]
[Black "Ito, Katsumi"]
[Result "1-0"]
[ECO "D02"]
[WhiteElo "1349"]
[BlackElo "1301"]
[Annotator "Fritz 15 (30s)"]
[PlyCount "79"]

{D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4} 1. d4
d5 2. Bf4 Nf6 3. Nf3 Bf5 4. e3 a6 $146 {Prevents intrusion on b5} (4... Nbd7 5.
Ne5 (5. Be2 e6 6. O-O Be7 7. c4 c6 8. Qb3 Qb6 9. c5 Qxb3 10. axb3 Bxb1 11.
Rfxb1 O-O 12. h3 Ne4 13. b4 a6 14. Bd3 f5 15. Re1 h6 16. Ne5 Nxe5 17. Bxe5 Bh4
18. Re2 Bf6 19. Bh2 Ng5 {Abergel,T (2506)-Ribeiro,R (2183) Fourmies 2011 1-0 
(55)}) 5... h6 6. c4 e6 7. Nc3 Be7 8. h3 O-O 9. Be2 dxc4 10. Bxc4 c5 11. dxc5
Nxe5 12. Bxe5 Nd7 13. Bg3 Nxc5 14. O-O a6 15. Qxd8 Rfxd8 16. Rfd1 Nd3 17. Bxd3
Bxd3 18. Be5 b5 19. a3 {Kodinets,K (2409)-Fingerov,D (2350) chessassistantclub.
com INT 2004 1/2-1/2 (57)}) (4... h6 5. h3 e6 6. c4 dxc4 7. Bxc4 Bd6 8. Bxd6
cxd6 9. Qb3 Qa5+ 10. Nc3 Nbd7 11. O-O O-O 12. Rfe1 d5 13. Bb5 Rfd8 14. Rec1 Nb6
15. Ne5 a6 16. Be2 Nfd7 17. f4 Nxe5 18. fxe5 Rac8 19. a3 {Mufic,G (2301)
-Margitic,Z (2199) Sibenik 2008 1/2-1/2}) 5. Nbd2 e6 6. Nh4 Be7 (6... Bg4 7.
Nhf3 $11) 7. Nxf5 $14 exf5 {White has the pair of bishops} 8. Bd3 {White
threatens to win material: Bd3xf5} Nc6 (8... Qd7 9. c4 $14) 9. c3 (9. Bxf5 g6
10. Bd3 O-O $16) 9... O-O (9... Qd7 $5 $11 {has some apparent merit}) 10. Bxf5
$16 g6 11. Bd3 Nh5 12. Bg3 (12. Bh6 Re8 $16) 12... Re8 13. Nf3 Nxg3 14. hxg3 {
Opposite coloured bishops appeared} Bf6 15. Qb3 Na5 16. Qa4 Nc4 (16... c6 17.
O-O-O $16) 17. Bxc4 b5 (17... dxc4 $5 18. Qxc4 b5 $16) 18. Bxb5 $1 $18 {the end
} axb5 19. Qb3 (19. Qxb5 Re6 $18) 19... Be7 (19... Rb8 20. O-O $16) 20. Ne5 (
20. Qxb5 Rb8 21. Qe2 Rc8 $18) 20... Ra6 (20... Bf6 21. Nd3 $16) 21. f4 (21.
Qxb5 Qa8 $18) 21... c5 (21... f6 $142 $5 22. Nf3 Bf8 $16) 22. dxc5 $18 Bxc5 23.
Qxb5 Qc8 24. b4 {White threatens to win material: b4xc5} (24. O-O-O $142 Rxa2
25. Qd7 Qxd7 26. Nxd7 Bxe3+ 27. Kb1 $18) 24... Rb6 $4 (24... Bxe3 $142 {
would keep Black in the game} 25. Qd3 Bb6 $11) 25. Qd3 (25. Qxc5 $142 {and
White has prevailed} Qe6 26. Qc7 $18) 25... Be7 (25... Bf8 26. O-O $18) 26. O-O
Bf6 27. Qxd5 Re7 (27... Rbe6 28. c4 Bxe5 29. fxe5 Rd8 $18) 28. c4 (28. Rad1 $5
{makes it even easier for White} Bxe5 29. Qd8+ Qxd8 30. Rxd8+ Kg7 31. fxe5 Ra6
$18) 28... Qe8 $2 (28... Bxe5 $5 29. fxe5 Rxb4 $16) 29. Qc5 (29. b5 Bxe5 30.
fxe5 Rxe5 $18) 29... Rbe6 (29... Rbb7 30. Rfd1 $18) 30. Rae1 (30. Rad1 $142 $5
{keeps an even firmer grip} Bxe5 31. fxe5 Qb8 $18) 30... Bxe5 31. fxe5 Rxe5 32.
Qd4 (32. Qd6 Rd7 33. Qf6 Rxe3 34. Rxe3 Qxe3+ 35. Kh2 Qh6+ 36. Qh4 Qd2 $18)
32... Rd7 (32... Re4 33. Qc3 Rxe3 34. Rxe3 Rxe3 $16) 33. Qf4 $4 {hands over
the advantage to the opponent} (33. Qc3 Rde7 34. Rf3 Qa4 $18) 33... Rf5 $2 (
33... Re4 34. Qf3 Rxc4 $14) 34. Qh6 $4 {White loses the upper hand} (34. Qg4
$142 Rxf1+ 35. Rxf1 Qxe3+ 36. Kh2 $18) 34... Re7 $4 {releasing the pressure on
the opponent} (34... Rh5 35. Qf4 Rf5 $18) 35. Rxf5 $18 gxf5 36. Qg5+ Kh8 37.
Qf6+ Kg8 38. Qg5+ {Twofold repetition} Kh8 39. Kf2 (39. Qxf5 $5 {and White can
already relax} h6 40. b5 Kg8 41. Qg4+ Kf8 $18) 39... Re5 (39... Ra7 {doesn't
improve anything} 40. Re2 $18) 40. Rh1 (40. Rh1 f4 41. Qxf4 $18) 1-0

[Event "SapporoSummer2017"]
[Site "?"]
[Date "2017.07.29"]
[Round "3.1"]
[White "Watanabe, Katsumi"]
[Black "Sugimoto, Koichi"]
[Result "0-1"]
[ECO "D15"]
[WhiteElo "1695"]
[BlackElo "1929"]
[Annotator "Fritz 15 (30s)"]
[PlyCount "68"]

{D15: Slav Defence: 4 Nc3 a6 and gambit lines after 4 Nc3 dxc4} 1. d4 d5 2. c4
c6 3. e3 Nf6 4. Nf3 a6 5. Nc3 b5 6. c5 Nbd7 7. a3 g6 8. Be2 $146 (8. b4 Bg7 9.
Bb2 (9. a4 Bb7 10. Bd3 O-O 11. O-O Ne8 12. e4 dxe4 13. Bxe4 Ndf6 14. Bc2 Nc7
15. Bd2 bxa4 16. Rxa4 Nb5 17. Ne2 Bc8 18. Ne5 Qc7 19. Bf4 Qb7 20. Qd2 Be6 21.
Rfa1 Rfd8 22. h3 Nd5 23. Bg3 f6 {Loetscher,R (2420)-Nuber,K (2265) Germany
2014 1/2-1/2 (48)}) 9... O-O (9... a5 10. Bd3 O-O 11. O-O Qc7 12. h3 Ne8 13.
Qe2 e5 14. Nxe5 Nxe5 15. dxe5 Bxe5 16. f4 Bg7 17. e4 axb4 18. axb4 Rxa1 19.
Bxa1 dxe4 20. Bxe4 Nf6 21. Qf3 Bd7 22. Bd3 Re8 23. f5 Bxf5 24. Bxf5 {Mah,K 
(2419)-Jirka,J (2396) England 2012 1/2-1/2 (59)}) 10. a4 Rb8 11. axb5 axb5 12.
h3 Qc7 13. Ra2 Ne4 14. Qa1 Nxc3 15. Bxc3 f6 16. h4 e5 17. dxe5 Nxe5 18. h5 Re8
19. Be2 Bf5 20. hxg6 Bxg6 21. Kf1 Re7 22. Bd4 Rf8 {Vallejo Pons,F (2674)
-Jakovenko,D (2671) Lugo 2006 1/2-1/2 (62)}) (8. Bd3 Bg7 9. O-O O-O 10. b4 Ne8
11. e4 dxe4 12. Bxe4 Bb7 13. Bg5 Ndf6 14. Bc2 Nc7 15. Bb3 h6 16. Bh4 Nfd5 17.
Nxd5 Nxd5 18. Re1 Re8 19. Ne5 g5 20. Bg3 e6 21. Qh5 Qf6 22. Ng4 Qxd4 {Schwarz,
D (2286)-Betko,L (2208) Slovakia 2011 0-1 (64)}) 8... Bg7 9. O-O O-O 10. b4 a5
{The thematic attack} 11. Rb1 Re8 12. Qc2 e5 13. dxe5 (13. a4 axb4 14. Rxb4 Qa5
$11) 13... Nxe5 $15 14. Nd4 {The knight likes it on d4} Qc7 15. f4 {White
threatens to win material: f4xe5} (15. a4 axb4 16. Rxb4 bxa4 17. Rxa4 Rxa4 18.
Nxa4 Neg4 $11) 15... Neg4 {[%cal Yf6e4,Yg4f6,Ye5g4] The knight intends
Ne5-g4-f6-e4. Black threatens to win material: Ng4xe3} 16. Rf3 axb4 17. axb4
Ne4 18. h3 (18. Bd3 Bd7 19. Nce2 Ra4 $15) 18... Ngf6 (18... Bxd4 $142 $5 19.
exd4 Nxc3 20. Qxc3 Rxe2 21. hxg4 Raa2 $17) 19. Bd2 Nxc3 20. Bxc3 Ne4 {A
comfortable square for the black knight} 21. Rbf1 f5 22. Bb2 Bd7 23. Bd3 Ra2
24. Qb3 {White threatens to win material: Qb3xa2} Qa7 25. Bxe4 (25. Bb1 Ra4 26.
Rd1 Re7 $11) 25... Rxe4 $15 {A classical outpost} 26. R3f2 Qa4 27. Qxa4 $2 (27.
Qc3 $142 $5 $15 {and White can hope to survive}) 27... Rxa4 $19 28. Re2 (28.
Nf3 Rxe3 29. Bxg7 Kxg7 $19) 28... Rxb4 29. Ra1 $4 {an oversight. But White was
lost anyway.} (29. Rd1 $19) 29... Bxd4 30. Ra8+ (30. Bxd4 {does not save the
day} Rbxd4 31. exd4 Rxe2 $19) 30... Be8 31. Bxd4 Rbxd4 32. Rea2 (32. exd4 {
is not much help} Rxe2 33. Kf1 Re4 $19) 32... Ra4 (32... Rxe3 {makes it even
easier for Black} 33. Kf2 Rde4 34. Rb8 $19) 33. Kf2 (33. R2xa4 {doesn't change
the outcome of the game} bxa4 34. Kf2 Kf7 $19) 33... Rxa2+ 34. Rxa2 Ra4 (34...
Ra4 35. Re2 Rc4 $19) 0-1

[Event "SapporoSummer2017"]
[Site "?"]
[Date "2017.07.29"]
[Round "3.2"]
[White "Yoshii, Yukihiko"]
[Black "Kanamaru, Tomoji"]
[Result "0-1"]
[ECO "A85"]
[WhiteElo "1867"]
[BlackElo "1590"]
[Annotator "Fritz 15 (30s)"]
[PlyCount "78"]

{A85: Dutch Defence: 2 c4 Nf6 3 Nc3} 1. c4 f5 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5.
Bg5 O-O (5... Ne4 6. Bd2 d6 7. Qc2 Nxd2 8. Qxd2 Nc6 9. e3 O-O 10. Be2 e5 11. d5
Nb8 12. O-O-O Nd7 13. Ne1 Nc5 14. f3 e4 15. f4 Bd7 16. Nc2 a5 17. Kb1 c6 18.
Rc1 Qb6 19. Rhd1 Rfd8 20. Na3 {Garcia Martinez,S (2435)-Knezevic,M (2505)
Polanica Zdroj 1978 1/2-1/2 (40)}) 6. e3 d6 7. Be2 Nc6 $146 (7... Qe8 8. O-O e5
9. dxe5 dxe5 10. Bxf6 Bxf6 11. Nd5 Bd8 12. b4 c6 13. Nc3 Bc7 14. e4 f4 15. c5
h6 16. Nd2 Be6 17. Bg4 Bxg4 18. Qxg4 Nd7 19. Rfd1 Nf6 20. Qe2 Nh7 21. f3 Ng5
22. Nc4 {Scholzen,W (2151)-Huesmann,T (2248) Maastricht 2013 0-1 (48)}) (7...
Ne4 8. Nxe4 fxe4 9. Nd2 c5 10. Nxe4 h6 11. Bh4 cxd4 12. O-O Nc6 13. Bf3 dxe3
14. fxe3 Bxb2 15. Rb1 Be5 16. Bg3 Kh7 17. Bxe5 Nxe5 18. Be2 Rxf1+ 19. Bxf1 b6
20. Qd5 Bf5 21. Rb2 Rc8 22. Rf2 {Juer,J (2215)-Elci,P (2300) Sao Paulo 2014
0-1 (46)}) (7... c6 8. O-O (8. h3 Nbd7 9. Qc2 Ne4 10. Nxe4 fxe4 11. Nd2 d5 12.
cxd5 cxd5 13. O-O h6 14. Bh4 Nf6 15. Rac1 Qe8 16. Qb3 g5 17. Bg3 Kh8 18. Rc7 h5
19. f3 g4 20. hxg4 hxg4 21. fxe4 Nh5 22. Bh4 Rxf1+ {Dunnington,A (2435)
-Toulzac,P (2265) Toulouse 1994 1-0}) 8... Qe8 9. b4 e5 10. dxe5 dxe5 11. c5 h6
12. Bxf6 Bxf6 13. Nd2 e4 14. Qb3+ Kg7 15. Rfd1 a5 16. Rab1 axb4 17. Qxb4 Na6
18. Bxa6 Rxa6 19. Nc4 Qe7 20. Nd6 Be6 21. a4 Rb8 22. Ne2 {Szmetan,J (2394)
-Blit,J (2306) Avellaneda 2007 1/2-1/2}) 8. d5 {White threatens to win
material: d5xc6} Ne5 9. O-O Nxf3+ 10. Bxf3 h6 {Black threatens to win material:
h6xg5} 11. Bh4 Bd7 12. h3 {Secures g4} Rb8 13. a4 a6 {Consolidates b5} 14. Qe2
Qe8 (14... g5 15. Bg3 $11) 15. a5 (15. Bg3 Nh7 $11) 15... e5 (15... g5 16. Bg3
$11) 16. dxe6 Bxe6 17. Qd3 (17. Bxf6 $5 Bxf6 18. Nd5 Bxd5 19. cxd5 $14) 17...
Qf7 18. b3 Nd7 19. Rad1 $4 (19. Qc2 $142 $11 {would bring relief}) 19... Ne5
$19 20. Qc2 (20. Qd2 Nxf3+ 21. gxf3 f4 22. exf4 Qxf4 23. Qxf4 Rxf4 $19) 20...
Nxf3+ 21. gxf3 f4 22. exf4 Bxh3 23. Rfe1 $2 (23. Nd5 Rbe8 24. Rfe1 $19) 23...
Qxf4 24. Qxg6 (24. Nd5 {is not the saving move} Qxh4 25. Ne7+ Kh7 26. Qxg6+ Kh8
$19) 24... Qxh4 25. Nd5 (25. Re4 {does not solve anything} Qg5+ 26. Qxg5 hxg5
$19) 25... Qg5+ (25... Rxf3 $142 {might be the shorter path} 26. Re2 $19) 26.
Qxg5 hxg5 27. Re3 (27. Nxc7 {hardly improves anything} Rxf3 28. Rxd6 Kf7 $19)
27... Rf7 28. f4 (28. Ne7+ {cannot change destiny} Kh7 $19) 28... Bg4 29. Rde1
gxf4 30. Ne7+ (30. Re7 {a last effort to resist the inevitable} c6 31. Rxf7
Kxf7 32. Re7+ Kf8 33. Re4 $19) 30... Kh7 31. Re4 Be5 32. Nd5 (32. f3 {does not
win a prize} Bxf3 33. Rxe5 dxe5 34. Rxe5 Re8 $19) 32... Bf3 33. Rxe5 dxe5 34.
Rxe5 (34. Rc1 $19 {the only chance to get some counterplay}) 34... Kg6 35. Re6+
Kf5 36. Rh6 Re8 37. Kf1 c6 38. Nc3 Rg7 (38... Rfe7 39. Rh5+ Kg4 40. Rh4+ Kxh4
41. Ne2 Rxe2 42. Kg1 Re1+ 43. Kh2 Rh1#) 39. Rh2 (39. Rh5+ {cannot change what
is in store for ?} Kf6 40. Nd5+ cxd5 41. Rh6+ Kf7 42. Re6 Rxe6 43. cxd5 Bg2+
44. Kg1 Re1+ 45. Kh2 Rh1#) 39... Rge7 (39... Rge7 40. Ne2 Rxe2 41. Rh5+ Kg6 42.
Rg5+ Kxg5 43. Kg1 Re1+ 44. Kh2 Rh1#) (39... Rg1+ 40. Kxg1 Re1#) 0-1

[Event "SapporoSummer2017"]
[Site "?"]
[Date "2017.07.30"]
[Round "4.1"]
[White "Sugimoto, Koichi"]
[Black "Sato, Takeru"]
[Result "1-0"]
[ECO "A40"]
[WhiteElo "1929"]
[BlackElo "1349"]
[Annotator "Fritz 15 (30s)"]
[PlyCount "46"]

{A40: Unusual replies to 1 d4} 1. d4 b6 2. c4 Bb7 3. Nc3 e6 4. e4 Bb4 5. f3 Ne7
6. Bd3 O-O 7. Nge2 c5 8. d5 Ng6 9. O-O Bxc3 10. Nxc3 {White has the pair of
bishops} Na6 $146 (10... e5 11. f4 exf4 12. e5 Qh4 13. Nb5 Na6 14. Nd6 Nxe5 15.
Rxf4 Qe7 16. Bxh7+ Kxh7 17. Qh5+ Kg8 18. Rh4 Nf3+ 19. gxf3 Qe1+ 20. Kg2 Qe2+
21. Kg3 Qe1+ 22. Kf4 g5+ 23. Qxg5# {1-0 (23) Akesson,R (2468)-Den Heeten,D 
(2258) Wijk aan Zee 2007}) 11. a3 Nc7 12. f4 f5 13. e5 (13. exf5 $5 exf5 14.
Be3 $16) 13... exd5 (13... d6 $5 $11) 14. cxd5 $14 Nxd5 $4 (14... d6 $142 $14 {
saving the game}) 15. Bc4 $18 Kh8 16. Bxd5 Bxd5 17. Qxd5 Ne7 18. Qf3 (18. Qd3 {
keeps an even firmer grip} Nc6 $18) 18... Nc6 (18... d5 19. exd6 Qxd6 20. Be3
$18) 19. Be3 Qc7 (19... Rb8 {doesn't change anything anymore} 20. Rfd1 $18) 20.
Rad1 Rad8 (20... Rfe8 {does not help much} 21. Qd5 Re7 22. Qd3 $18) 21. Nb5 Qb7
22. Rd6 (22. Nd6 {might be the shorter path} Qa8 $18) 22... Qb8 (22... Rfe8 {
does not win a prize} 23. Qd5 $18) 23. Rfd1 Rf7 1-0

[Event "SapporoSummer2017"]
[Site "?"]
[Date "2017.07.30"]
[Round "4.2"]
[White "Kanamaru, Tomoji"]
[Black "Ito, Katsuhide"]
[Result "1-0"]
[ECO "B33"]
[WhiteElo "1590"]
[BlackElo "1301"]
[Annotator "Fritz 15 (30s)"]
[PlyCount "57"]

{B33: Sicilian: Pelikan and Sveshnikov Variations} 1. e4 c5 2. Nf3 Nc6 3. d4
cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 a6 7. Nd6+ Bxd6 8. Qxd6 Qe7 9. Qxe7+ (9. Qc7
d5 10. Qxe7+ Nxe7 11. exd5 Nexd5 12. Nxd5 Nxd5 13. Bd2 Be6 14. c4 Ne7 15. Bc3
f6 16. b3 O-O-O 17. Be2 Nc6 18. O-O Nd4 19. Bd1 g5 20. Rc1 h5 21. Re1 h4 22. f3
Bf5 23. Kf2 Ne6 {Vavulin,M (2393)-Esipenko,A (2286) Kolomna 2014 1/2-1/2 (45)})
9... Kxe7 (9... Nxe7 10. Bg5 b5 11. f3 Bb7 12. O-O-O h6 13. Bh4 g5 14. Bf2 Rc8
15. h4 Rg8 16. hxg5 hxg5 17. Rh6 Rg6 18. Rh8+ Rg8 19. Rh6 Rg6 20. Rh8+ Rg8 21.
Rxg8+ Nfxg8 22. Bg3 f6 23. Be1 Bc6 24. b4 {Jakovenko,D (2726)-Cuartas,J (2526)
Khanty-Mansiysk 2010 1-0 (58)}) 10. Be3 b5 $146 (10... d6 11. O-O-O Be6 12. Be2
Rhd8 13. Rd2 d5 {1/2-1/2 (13) Kahn,E (2290)-Werner,D (2362) Budapest 2004}) (
10... d6 11. O-O-O $14) 11. a3 (11. a4 bxa4 12. Rxa4 d6 $16) 11... Bb7 12.
O-O-O Nd4 (12... d6 $142 $5 $14 {must be considered}) 13. Bxd4 $16 exd4 14.
Rxd4 Rhd8 15. Be2 h5 16. e5 Ng4 (16... Ne8 $5 $16) 17. Bxg4 $18 hxg4 18. Rxg4
g6 19. f3 Rh8 20. Rd4 Rad8 (20... Rh5 21. Nd5+ Bxd5 22. Rxd5 $18) 21. h3 Rh5
22. Re1 Rg5 $4 {Black has lost his nerve... understandable when you consider
his position} (22... Ra8 23. Nd1 $18) 23. Re2 (23. g4 $142 {might be the
shorter path} Bxf3 24. Rf4 Bxg4 25. hxg4 Rc8 26. Nd5+ Kf8 $18) 23... Rc8 $2 (
23... Rf5 24. a4 Bc6 25. axb5 axb5 26. Kd2 $18) 24. Nd5+ (24. g4 {seems even
better} Bxf3 25. Re3 Bxg4 26. hxg4 Rc4 27. Rxc4 bxc4 28. Nd5+ Ke6 29. Nc7+ Ke7
$18) 24... Kf8 $4 {simply worsens the situation} (24... Bxd5 25. Rxd5 Rc6 $18)
25. Nf6 Kg7 26. Nxd7 (26. Rxd7 {makes it even easier for White} Bc6 27. Ra7 Rf5
$18) 26... Rd8 (26... a5 {doesn't change the outcome of the game} 27. Nf6 Rh8
28. Rd7 $18) 27. e6 (27. g4 $5 {and White can already relax} Bxf3 28. Rf2 Bc6
$18) 27... fxe6 28. Nc5 $1 {Discovered attack: d7, Rd4xd8} Rxd4 (28... Rxc5 29.
Rxd8 {Discovered attack}) 29. Nxe6+ (29. Nxe6+ Kf6 30. Nxd4 $18) 1-0

[Event "SapporoSummer2017"]
[Site "?"]
[Date "2017.07.30"]
[Round "4.3"]
[White "Yoshii, Yukihiko"]
[Black "Watanabe, Katsumi"]
[Result "1-0"]
[ECO "E21"]
[WhiteElo "1867"]
[BlackElo "1695"]
[Annotator "Fritz 15 (30s)"]
[PlyCount "63"]

{E21: Nimzo-Indian: 4 Nf3} 1. c4 Nf6 2. Nc3 e6 3. d4 Bb4 4. Bg5 h6 5. Bh4 O-O
6. Nf3 d5 7. e3 Nbd7 8. Bd3 c6 9. O-O Qa5 10. Qc2 Bxc3 11. bxc3 dxc4 $146 (
11... b6 12. Nd2 Ba6 13. Bg3 Rfc8 14. a4 dxc4 15. Nxc4 Bxc4 16. Bxc4 c5 17.
Rfc1 cxd4 18. cxd4 Rc6 19. Qb2 a6 20. Bd3 Rac8 21. Bd6 Rxc1+ 22. Rxc1 Rxc1+ 23.
Qxc1 Ne8 24. Qc8 Ndf6 25. Be5 Qxa4 26. Bxa6 {Gallego Alcaraz,A (2368)-Garavito,
M (2249) Santa Rosa 2011 1-0 (43)}) 12. Bxc4 {White has the pair of bishops}
Nd5 (12... b6 13. a4 $14) 13. Rac1 b6 14. Bg3 Ba6 15. Bxa6 Qxa6 16. e4 N5f6 17.
Bd6 {White threatens to win material: Bd6xf8} Rfc8 18. c4 c5 19. d5 {This push
gains space} b5 (19... exd5 20. exd5 Re8 21. Bc7 $11) 20. Be5 (20. dxe6 $142 $5
Qxd6 21. exd7 Qxd7 22. e5 $16) 20... bxc4 $11 21. dxe6 Qxe6 22. Bxf6 Nxf6 23.
Rfe1 Rc7 24. Qxc4 Qxc4 25. Rxc4 {Black has a new passed pawn: c5} Rb8 26. h3 {
Prevents intrusion on g4} Rb2 27. a4 a5 28. Ne5 Rb4 29. f3 $2 {Consolidates g4}
(29. Rec1 $142 Nxe4 30. Nd3 Rxc4 31. Rxc4 $11) 29... Nh7 $4 {throwing away the
advantage} (29... Nd7 $142 {with excellent chances for Black} 30. Rxb4 cxb4 $19
) 30. Rec1 $16 f6 (30... Ng5 $142 $5 $16) 31. Nd3 $18 Rxc4 32. Rxc4 1-0

[Event "SapporoSummer2017"]
[Site "?"]
[Date "2017.07.30"]
[Round "5.1"]
[White "Sato, Takeru"]
[Black "Kanamaru, Tomoji"]
[Result "0-1"]
[ECO "A80"]
[WhiteElo "1349"]
[BlackElo "1590"]
[Annotator "Fritz 15 (30s)"]
[PlyCount "62"]

{A80: Dutch Defence: Unusual White second moves} 1. d4 f5 2. Nf3 Nf6 3. Bf4 g6
4. e3 Bg7 5. Bc4 e6 6. O-O (6. h3 d6 7. Nc3 Qe7 8. Qe2 Nbd7 9. a4 c6 10. a5 Ne4
11. Bh2 e5 12. Bb3 exd4 13. exd4 Ndf6 14. O-O Be6 15. Bxe6 Qxe6 16. Rfe1 O-O
17. Ng5 Nxg5 18. Qxe6+ Nxe6 19. Rxe6 Ne8 20. Ne2 Rd8 {Miladinovic,I (2535)
-Grivas,E (2460) Ano Liosia 1995 1-0 (44)}) 6... d6 $146 {Secures e5} (6... O-O
7. Nbd2 b6 8. h3 Bb7 9. c3 h6 10. Ne5 Kh7 11. g4 Nc6 12. Ndf3 Nxe5 13. Nxe5 d6
14. Nxg6 Kxg6 15. Bxe6 fxg4 16. hxg4 Kh7 17. f3 Nd5 18. Bg3 Kh8 19. Qd2 Qe7 20.
Bxd5 Bxd5 21. e4 {Chlevistan,J (2157)-Ivanov,M (2372) Orlova 2014 1-0 (37)}) 7.
h3 {Controls g4} O-O 8. c3 Qe8 9. Qb3 h6 {Covers g5} 10. Nbd2 Nc6 11. Bd3 Kh8
12. Bh2 e5 13. d5 {White threatens to win material: d5xc6} (13. dxe5 $5 {
is noteworthy} Nxe5 14. Nxe5 dxe5 15. Rad1 $14) 13... Na5 $15 {Black threatens
to win material: Na5xb3} 14. Qb4 b6 15. e4 f4 {Black gets more space} (15...
fxe4 16. Bxe4 Kg8 17. Nh4 Nxe4 18. Qxe4 $15) 16. c4 (16. a4 Nb7 $11) 16... Nb7
17. Qc3 Nc5 18. Bc2 g5 19. b4 {White threatens to win material: b4xc5} Ncd7 (
19... Nb7 20. a3 $11) 20. Ba4 Qh5 21. Bd1 (21. Bc6 $5 {should be investigated
more closely} Rb8 22. Qc2 $11) 21... g4 $15 {Black threatens to win material:
g4xf3. Black forks: f3+h3} 22. Ne1 Qg5 23. hxg4 Nxg4 24. Bxg4 Qxg4 25. Qf3 {
White threatens to win material: Qf3xg4} (25. f3 Qg6 $11) 25... Nf6 26. Nd3 (
26. Qa3 a5 $15) 26... Qg5 (26... Qxf3 $142 27. gxf3 Bh3 $17) 27. Rac1 $4 {
[%cal Yc4c5] White plans c5} (27. Nb2 $142 $15 {this is the best way to fight
back}) 27... Bg4 $19 28. c5 (28. Bxf4 {a last effort to resist the inevitable}
exf4 29. Qxf4 Nxe4 30. Nxe4 Qxf4 31. Nxf4 Rxf4 32. f3 Bd4+ 33. Kh2 $19) 28...
Bxf3 29. Nxf3 Qh5 30. cxd6 (30. Rfe1 {is not much help} Rg8 31. Kh1 Bf8 $19)
30... cxd6 31. Rc6 (31. Bxf4 {doesn't do any good} Nxe4 32. Bh2 Rxf3 $19) 31...
Rfd8 (31... Rfd8 32. Re1 b5 $19) 0-1

[Event "SapporoSummer2017"]
[Site "?"]
[Date "2017.07.30"]
[Round "5.2"]
[White "Ito, Katsuhide"]
[Black "Yoshii, Yukihiko"]
[Result "0-1"]
[ECO "C96"]
[WhiteElo "1301"]
[BlackElo "1867"]
[Annotator "Fritz 15 (30s)"]
[PlyCount "60"]

{C96: Closed Ruy Lopez: Chigorin Defence: 11 d4, replies other than 11...Qc7} 
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. h3
O-O 9. c3 Na5 10. Bc2 c5 11. d4 cxd4 12. cxd4 Nc6 13. Nbd2 exd4 14. Nb3 Bb7
$146 (14... d3 15. Bxd3 Bb7 16. Bd2 Re8 17. a4 Bf8 18. axb5 axb5 19. Rxa8 Bxa8
20. Bg5 h6 21. Bxf6 Qxf6 22. Bxb5 Qxb2 23. Nbd4 Rc8 24. Qc1 Qxc1 25. Rxc1 Na7
26. Rxc8 Nxc8 27. Bc6 Bxc6 28. Nxc6 Nb6 29. Kf1 {Geller,E (2590)-Romanishin,O 
(2610) Lvov 1978 1/2-1/2 (52)}) (14... Nb4 15. Nbxd4 (15. Bb1 d3 16. Nbd4 Bb7
17. a3 Nc2 18. Nxc2 dxc2 19. Bxc2 Re8 20. Bf4 (20. Qd3 d5 21. e5 Ne4 22. Be3 g6
23. Rad1 Qc7 24. Rc1 Rac8 25. Bb1 Qd7 26. Ba2 Nc5 27. Qd2 Ne4 28. Qd3 Nc5 29.
Qe2 Ne4 30. Rxc8 Rxc8 31. Rd1 Qe6 32. Qd3 Nc5 33. Qd4 Na4 34. Ng5 Qf5 {Jansa,V
(2470)-Westerinen,H (2395) Gausdal 1988 1/2-1/2 (62)}) 20... Rc8 21. Rc1 Bf8
22. e5 dxe5 23. Qxd8 Rexd8 24. Bxe5 Bxf3 25. gxf3 Re8 26. Kf1 Nd7 27. Bc3 Rxe1+
28. Rxe1 g6 29. Be4 Nc5 {Arnason,J (2555)-Romanishin,O (2555) Jurmala 1987 1/
2-1/2 (50)}) 15... Nxc2 16. Nc6 Nxe1 17. Nxd8 Nxf3+ 18. Qxf3 Rxd8 19. e5 Be6
20. exf6 Bxf6 21. h4 Bxh4 22. Bd2 Bf6 23. Bc3 Bxc3 24. Qxc3 Rdc8 25. Qd2 Rc6
26. Rc1 Rac8 27. Rxc6 Rxc6 28. Kh2 h6 29. a3 {Thomassen,J (2308)-Zilberman,Y 
(2463) Cappelle-la-Grande 2008 0-1 (68)}) 15. Nfxd4 Qc7 (15... Nxd4 16. Nxd4
Rc8 17. a4 $14) 16. Bf4 Rfe8 17. Nf5 {White threatens to win material: Nf5xd6}
Rad8 18. Qe2 (18. a4 bxa4 19. Nc5 g6 20. Nh6+ Kg7 21. Nxb7 Qxb7 22. Bxa4 Rc8
$16) 18... Bf8 $14 19. Rad1 (19. Rac1 Nd7 $14) 19... Ne5 {White has a very
active position} (19... Nb4 20. Bb1 Bxe4 21. Bxe4 Rxe4 22. Qf3 Rxe1+ 23. Rxe1
$15) 20. Bh2 (20. Bg5 $142 $5 $11 {might be a viable alternative}) 20... Nc4
$15 {Black threatens to win material: Nc4xb2} 21. Nc5 $4 (21. Nbd4 $142 $15 {
is the best option White has}) 21... Bc8 (21... Qxc5 $142 $5 {keeps an even
firmer grip} 22. b3 Bxe4 23. Bxe4 Nxe4 24. Nh6+ gxh6 25. Qg4+ Ng5 26. bxc4 Qxc4
27. f4 $19) 22. Nd3 $2 (22. Nxa6 Qb6 23. b3 $19) 22... Bxf5 23. Nf4 (23. f3 $19
{there is nothing better in the position}) 23... Bxe4 24. Bxe4 Nxe4 (24... Rxe4
{and Black can already relax} 25. Qc2 Rxe1+ 26. Rxe1 $19) 25. Nd5 (25. Qc2 {
doesn't get the cat off the tree} Qc6 $19) 25... Qc5 26. Qg4 (26. b4 {what
else?} Qa7 27. Qc2 $19) 26... Nxf2 27. b4 Qa7 (27... Nxh3+ $142 {makes sure
everything is clear} 28. Kh1 Nf2+ 29. Kg1 Nxd1+ 30. Ne3 Ndxe3 31. bxc5 Nxg4 $19
) 28. Nf6+ (28. Qd4 {does not solve anything} Qxd4 29. Rxd4 Rxe1+ 30. Kxf2 Rde8
$19) 28... Kh8 29. Rd4 Nxg4 30. Ree4 (30. Bg3 {doesn't get the bull off the ice
} Qxd4+ 31. Kh1 Rxe1+ 32. Bxe1 Re8 33. Nxe8 Qe4 34. Bf2 Nce3 35. Bxe3 Nxe3 36.
h4 Qxg2#) 30... Nxf6 (30... Nxf6 31. Rh4 Re1+ 32. Kf2 Ne4+ 33. Rhxe4 Rxe4 34.
Be5 dxe5 35. Kg3 Qxd4 36. Kh2 Re1 37. a4 Qf4+ 38. g3 Rd2#) (30... Qxd4+ 31. Kh1
Nf2+ 32. Kg1 Nxe4+ 33. Kh1 Nf2+ 34. Kg1 Re1#) 0-1

