[Event "Hokkaido Chess Championship 2020"]
[Site "?"]
[Date "2020.03.21"]
[Round "1.1"]
[White "Sugimoto, Koichi"]
[Black "Nakamura, Mitsuru"]
[Result "1-0"]
[ECO "D30"]
[WhiteElo "2021"]
[BlackElo "1325"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "39"]
[EventDate "2020.03.21"]
[EventRounds "5"]
[EventCountry "JPN"]

{D30: Queen's Gambit Declined: Systems without Nc3} 1. d4 d5 2. c4 c6 3. Nf3
Nf6 4. e3 e6 5. Nbd2 Nbd7 6. b3 Bd6 7. Bb2 O-O 8. Bd3 Qa5 $146 (8... Re8 9. O-O
(9. Ne5 Nf8 10. f4 Qe7 11. O-O N6d7 12. e4 f6 13. Nxd7 Bxd7 14. e5 Bc7 15. Nf3
dxc4 16. bxc4 Red8 17. Qb3 b5 18. Ba3 Qf7 19. Rac1 Bb6 20. cxb5 cxb5 21. Bc5
Rab8 22. Bxb6 Rxb6 23. Rc7 a6 {Boehle,L (2260)-Goldschmidt,C (2234) Germany
2009 1-0 (36)}) 9... e5 10. dxe5 Nxe5 11. Be2 dxc4 12. Nxc4 Nxc4 13. Bxc4 {
1/2-1/2 (13) Montilli,V (2201)-Cafaro,L (2152) Biella 2015}) (8... b6 9. O-O
Bb7 10. Qe2 c5 11. cxd5 exd5 12. Rfd1 Re8 13. Nf1 Ne4 14. Ng3 Nxg3 15. hxg3 Bf8
16. Rac1 a6 17. dxc5 bxc5 18. Qc2 h6 19. Bh7+ Kh8 20. Bf5 Nf6 21. g4 Kg8 22. g5
hxg5 23. Nxg5 {Anton Guijarro,D (2621)-Illescas Cordoba,M (2602) Madrid 2015
1-0}) (8... Qe7 9. O-O e5 10. dxe5 Nxe5 11. Nxe5 Bxe5 12. Bxe5 Qxe5 13. Nf3 Qe7
14. h3 Be6 15. Qc2 dxc4 16. Bxc4 Bxc4 17. Qxc4 {1/2-1/2 (17) Hort,V (2600)
-Reefschlaeger,H (2370) Bonn 1979}) (8... b6 9. O-O $14) 9. O-O h6 {Covers g5}
10. a3 c5 $2 (10... Qc7 $5 $14) 11. dxc5 (11. b4 $5 Qc7 12. bxc5 Be7 $18) 11...
Qxc5 $16 (11... Nxc5 $2 12. b4 Nxd3 13. bxa5 Nxb2 14. Qc2 Nxc4 15. Nxc4 dxc4
16. Qxc4 $18) 12. Rc1 a5 $2 (12... Be7 13. Qe2 $16) 13. Qe2 (13. Bd4 $5 Qxa3
14. Ra1 Qb4 $18) 13... Qa7 (13... Qb6 $5 $16) 14. e4 dxe4 15. Nxe4 Nxe4 $4 {
leading to a quick end} (15... Be7 $142 $16) 16. Qxe4 $18 (16. Bxe4 $6 Qb6 $16)
16... g6 17. Qh4 h5 (17... Qc5 18. Qxh6 e5 $18) 18. c5 $1 {the punch} Bc7 (
18... Bxc5 19. Qg5 {Combination}) (18... Nxc5 19. Qf6 {Combination}) 19. Qg5
Kh7 (19... e5 {is the last straw} 20. c6 Bd8 $18) 20. Qxh5+ (20. Qxh5+ Kg8 21.
Qh8#) 1-0

[Event "Hokkaido Chess Championship 2020"]
[Site "?"]
[Date "2020.03.21"]
[Round "1.2"]
[White "Ito, Katsuhide"]
[Black "Yoshii, Yukihiko"]
[Result "0-1"]
[ECO "C84"]
[WhiteElo "1257"]
[BlackElo "1824"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "86"]
[EventDate "2020.03.21"]
[EventRounds "5"]
[EventCountry "JPN"]

{C84: Closed Ruy Lopez: Unusual White 6th moves} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6
4. Ba4 Nf6 5. Nc3 Be7 6. O-O b5 7. Bb3 b4 $146 {Black threatens to win
material: b4xc3} (7... Bb7 8. d4 d6 9. dxe5 dxe5 10. Qe2 Nd7 11. Rd1 O-O 12.
Be3 Qe8 13. Nd5 Bd8 14. a4 Na5 15. Ba2 c6 16. Nb4 Rc8 17. axb5 axb5 18. Qd3 Nb8
19. Bc5 Be7 20. Bxe7 Qxe7 21. Qd6 Qxd6 22. Rxd6 {Steinbacher,M (2290)
-Herbrechtsmeier,C (2320) Germany 1986 1/2-1/2 (51)}) (7... O-O 8. a4 (8. Nd5
Bb7 9. Nxf6+ Bxf6 10. Bd5 Qc8 11. c3 Ne7 12. Bxb7 Qxb7 13. d4 {1/2-1/2 (13)
Bronstein,L (2357)-Perdomo,L (2312) Olavarria 2005}) 8... b4 9. Nd5 d6 10.
Nxf6+ Bxf6 11. Bd5 Bd7 12. a5 Rb8 13. Bc4 Be6 14. d3 d5 15. Bxa6 Ra8 16. Bb7
Rxa5 17. Bd2 dxe4 18. Rxa5 Nxa5 19. Bxe4 c5 20. c3 Qb6 21. cxb4 cxb4 22. Qa4 {
Fontaine,R (2507)-Nyback,T (2563) Stockholm 2005 1/2-1/2}) (7... O-O 8. d3 $14)
8. Nd5 $14 d6 ({Inferior is} 8... Nxe4 9. d4 Bb7 10. Re1 $18) 9. d3 h6 10. h3
O-O 11. c3 (11. a3 bxa3 12. Rxa3 Nd4 $16) 11... Rb8 (11... bxc3 12. bxc3 Rb8
13. Qc2 $11) 12. Ba4 {White threatens to win material: Ba4xc6} Nxd5 13. Bxc6 (
13. exd5 bxc3 14. bxc3 Na5 $11) 13... Nf6 (13... bxc3 $5 {is an interesting
alternative} 14. bxc3 Nxc3 $11) 14. Qa4 bxc3 15. bxc3 Bd7 16. Qxa6 $4 {
weakening the position} (16. Be3 $142 $14 {is the best chance}) 16... Rb6 $19
17. Qa7 Bxc6 18. Be3 Rb7 (18... Rb8 $5 {might be the shorter path} 19. Bd2 $19)
19. Qa6 Qd7 20. a4 (20. Rfb1 {is not much help} Rbb8 21. Rxb8 Rxb8 $19) 20...
Rb2 21. d4 (21. Rfb1 {what else?} Rxb1+ 22. Rxb1 $19) 21... Ra8 22. Qc4 Bxe4 (
22... d5 $142 {secures the win} 23. Nxe5 dxc4 24. Nxd7 Bxd7 25. f3 $19) 23.
dxe5 d5 24. Qd4 c5 25. Qd1 Bxf3 (25... Ne8 {makes it even easier for Black} 26.
Re1 $19) 26. Qxf3 Ne4 27. c4 Rxa4 (27... Rb4 {might be the shorter path} 28.
Rfc1 $19) 28. cxd5 $4 {a blunder in a bad position} (28. Rxa4 Qxa4 29. cxd5 $19
) 28... Rxa1 29. Rxa1 Qxd5 30. Rd1 (30. Re1 {doesn't get the bull off the ice}
Nc3 $19 (30... Qxe5 $6 {is clearly inferior} 31. Bf4 Qd5 32. Rxe4 $17)) 30...
Qxe5 31. Bf4 Qe6 32. Re1 Rb4 33. Ra1 (33. Qe2 {doesn't improve anything} Bh4
34. Rf1 Bf6 $19) 33... Nf6 (33... c4 $5 {seems even better} 34. Be3 $19) 34.
Bd2 Rb3 35. Qa8+ Kh7 36. Re1 Qd6 37. Be3 (37. Qa2 {does not win a prize} c4 $19
) 37... Rd3 (37... c4 {keeps an even firmer grip} 38. Qa4 Qd5 39. Rc1 $19) 38.
Qa1 (38. Qa4 {cannot change destiny} Qe6 $19) 38... Qd5 39. Qb1 (39. Qa4 {
cannot undo what has already been done} c4 $19) 39... c4 40. Bd2 (40. Qc2 {
is no salvation} Ne4 $19) 40... Bd6 (40... Bc5 $142 {and Black can already
relax} 41. Be3 Bxe3 42. Rxe3 $19) 41. Re3 (41. Be3 $19 {there is nothing else
anyway}) 41... g6 42. Rxd3 Qxd3 (42... cxd3 $142 {and Black wins} 43. Qd1 $19)
43. Qb2 (43. Qxd3 {is still a small chance} cxd3 44. Kf1 $19) 43... Ne4 (43...
Ne4 44. Qb7 Kg7 45. Qb2+ Kg8 46. Be1 Qd1 47. g3 Qxe1+ 48. Kg2 c3 49. Qa2 Nd2
50. Qa8+ Kg7 51. Qe8 Qf1+ 52. Kh2 Nf3#) 0-1

[Event "Hokkaido Chess Championship 2020"]
[Site "?"]
[Date "2020.03.21"]
[Round "1.3"]
[White "Sato, Yasuji"]
[Black "Kikuchi, Daijiro"]
[Result "0-1"]
[ECO "C01"]
[WhiteElo "1512"]
[BlackElo "1198"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "74"]
[EventDate "2020.03.21"]
[EventRounds "5"]
[EventCountry "JPN"]

{C01: French: Exchange Variation} 1. e4 e6 2. Nf3 d5 3. d4 $146 (3. d3 Nf6 (
3... dxe4 4. dxe4 Qxd1+ 5. Kxd1 Nf6 6. Bd3 Nbd7 7. Bf4 c6 8. Nbd2 Nc5 9. Re1
Nxd3 10. cxd3 Be7 11. Ne5 O-O 12. g4 Ne8 13. f3 f6 14. Nec4 e5 15. Be3 Be6 16.
Na5 Nd6 17. a4 Rfc8 18. Rc1 {Bezgodova,S (2281)-Molchanova,T (2220) Kopejsk
2002 1/2-1/2 (62)}) 4. e5 Nfd7 5. Bg5 f6 6. exf6 Nxf6 7. Be2 c5 8. O-O Nc6 9.
c4 Be7 10. Nc3 d4 11. Bxf6 gxf6 12. Ne4 O-O 13. Nfd2 f5 14. Ng3 Bd6 15. f4 Bd7
16. Nh5 Kh8 17. Nf3 Be8 {Bawart,M (2330)-Baumegger,S (2495) Austria 1998 1-0 
(34)}) (3. c3 dxe4 4. Qa4+ Bd7 5. Qxe4 Bc6 6. Qe3 Nd7 7. d4 Ngf6 8. Nbd2 Be7 9.
Nc4 O-O 10. Be2 Bd5 11. O-O c5 12. Nce5 cxd4 13. Qxd4 Bc5 14. Qh4 Nxe5 15. Nxe5
Nd7 16. Qxd8 Rfxd8 17. Nxd7 Rxd7 {Plank,F (2273)-Kuthan,A (2213) Austria 2012
1/2-1/2}) (3. exd5 $142 $5 {should not be overlooked} exd5 4. d4 $14) 3... dxe4
$15 4. Ng5 (4. Ne5 Nf6 $15) 4... Nf6 $17 5. Nc3 Bb4 6. a3 (6. f3 Nc6 7. a3 Ba5
8. fxe4 Qxd4 9. Qxd4 Nxd4 $17) 6... Bxc3+ 7. bxc3 h6 8. Nh3 b6 (8... O-O $5 9.
Bc4 $19) 9. Bb5+ $17 c6 10. Be2 Nbd7 11. Bf4 (11. O-O Bb7 $17) 11... Nd5 12.
Qd2 Nxf4 13. Qxf4 Nf6 14. O-O O-O 15. f3 $2 (15. Rfd1 $142 $5 $17) 15... Nd5
$19 16. Qd2 exf3 (16... e3 $142 {and Black can look forward to a comfortable
game} 17. Qe1 e5 $19) 17. Rxf3 $15 Nf6 (17... e5 18. dxe5 Bxh3 19. Rxh3 $17)
18. Nf2 (18. Bd3 Ng4 $11) 18... c5 19. Rg3 Kh8 20. Rd1 (20. Bf3 Rb8 $15) 20...
cxd4 21. cxd4 Qd6 22. Qe3 {Black has a cramped position} Bb7 23. Bf3 Bxf3 24.
Rxf3 Nd5 25. Qd2 f5 26. c4 Nf6 27. Nh3 (27. Rc3 Rfd8 $17) 27... Ne4 (27... Ng4
28. g3 e5 29. dxe5 Qc5+ 30. Kg2 $19) 28. Qc1 Rac8 29. Nf4 Kh7 30. Re1 $4 {
the final mistake, not that it matters anymore} (30. d5 $142 exd5 31. Rxd5 $19)
30... Qxd4+ 31. Kf1 (31. Rfe3 {praying for a miracle} Rfe8 32. Qd1 Qxc4 33. h3
$19) 31... Nd2+ 32. Ke2 Nxf3 33. Kxf3 (33. gxf3 {the last chance for
counterplay} Rxc4 34. Qe3 Qxf4 35. Qxf4 Rxf4 36. Ke3 $19) 33... Rxc4 34. Nxe6
Qg4+ 35. Kf2 Rxc1 $1 {Double attack: h2/f2} 36. Nxf8+ (36. Rxc1 Qh4+ {Double
attack}) (36. -- $140 Rc2+ {Mate threat}) 36... Kg8 37. Rxc1 Qf4+ (37... Qf4+
38. Ke2 Qxc1 $19) 0-1

[Event "Hokkaido Chess Championship 2020"]
[Site "?"]
[Date "2020.03.21"]
[Round "1.4"]
[White "Yoshida, So"]
[Black "Takeuchi, Hiroshi"]
[Result "0-1"]
[ECO "A08"]
[BlackElo "1343"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "70"]
[EventDate "2020.03.21"]
[EventRounds "5"]
[EventCountry "JPN"]

{A08: King's Indian Attack} 1. Nf3 Nf6 2. g3 g6 3. Bg2 d5 4. d3 Bg7 5. O-O O-O
6. Nbd2 c5 7. c3 Nc6 8. Qc2 e5 (8... h6 9. Re1 e5 10. e4 Re8 11. Nf1 Be6 12.
exd5 Nxd5 13. Ne3 Rc8 14. Nxd5 Bxd5 15. Be3 b6 16. Qd2 Kh7 17. Rac1 Rc7 18. b3
Rd7 19. Qe2 Ne7 20. Bh3 f5 21. d4 cxd4 22. cxd4 Bxf3 23. Qxf3 {Othman,A (2315)
-Lputian,S (2605) Dubai 2000 0-1 (38)}) (8... Qc7 9. e4 Rd8 10. Re1 e5 11. exd5
Nxd5 12. Ne4 h6 13. Be3 b6 14. Rad1 Bb7 15. Bc1 Rd7 16. h4 Rf8 17. Qe2 Re7 18.
h5 Nf6 19. hxg6 fxg6 20. Nh4 Kh7 21. Nd2 Ref7 22. Ne4 Ne7 23. Be3 {Kleinplatz,
S (2257)-Cheng,B (2410) Montreal 2014 0-1 (38)}) 9. e4 dxe4 $146 (9... Re8 10.
Re1 d4 11. a3 dxc3 12. bxc3 h6 13. Rb1 Qc7 14. Nc4 Be6 15. Ne3 Rad8 16. c4 Nd4
17. Qd1 b6 18. Bb2 Nh7 19. Bxd4 cxd4 20. Nd5 Bxd5 21. exd5 Ng5 22. Nxg5 hxg5
23. Bh3 Bf8 24. Qa4 {Matta,V (2274)-Ramakrishna,J (2253) New Delhi 2010 1/2-1/2
}) 10. dxe4 b6 {Black has an active position} 11. Nc4 {White threatens to win
material: Nc4xe5} Qc7 12. Re1 Be6 {Black threatens to win material: Be6xc4} 13.
Ne3 {Black has an active position} Rad8 14. b3 {Consolidates c4} Qc8 15. Ba3
Bh3 (15... Ng4 $5 $11) 16. Rad1 $14 Bxg2 17. Kxg2 {White king safety dropped}
Ng4 18. Nd5 Rde8 $2 (18... f5 $142 $5 {would keep Black alive} 19. h3 Nf6 20.
Nxf6+ Bxf6 $11) 19. b4 $16 Ne7 20. Qa4 (20. bxc5 $142 $5 bxc5 21. Qb3 $18)
20... Nxd5 $14 21. exd5 $4 {there were better ways to keep up the pressure} (
21. Rxd5 $142 {this is the best bet to save the position} f5 22. Nd2 $14 (22.
Qxa7 $4 {a poisoned pawn} fxe4 23. Rxe4 Nf6 $19)) 21... e4 $19 22. Ng5 (22. Ng1
Bxc3 23. d6 Qf5 $17 (23... Bxe1 24. d7 Qa8 25. dxe8=Q Rxe8 26. Rxe1 $16)) 22...
Qf5 23. Nh3 (23. Qc2 Qxg5 24. h3 $19) 23... Bxc3 24. Rf1 (24. Bc1 {there is
nothing better in the position} Bxe1 25. Rxe1 cxb4 26. Qxb4 $19) 24... e3 25.
bxc5 e2 26. cxb6 (26. Rh1 {does not solve anything} exd1=R 27. Qxd1 Re3 $19)
26... exf1=Q+ 27. Rxf1 Qxd5+ 28. Kg1 axb6 (28... Qh5 $142 {and the rest is a
matter of technique} 29. Kg2 Re2 $19) 29. Qxg4 (29. Bxf8 Nxf2 (29... Kxf8 $6
30. Qxg4 Qxa2 31. Qf3 $17) (29... Rxf8 $143 30. Qxg4 Qxa2 31. Qf3 $17) 30. Nxf2
Kxf8 31. Qa3+ Qc5 32. Qxc5+ bxc5 $19) 29... Qxa2 (29... f5 $142 {a pity that
Black didn't try this} 30. Qd1 Qxd1 31. Rxd1 Rf6 $19) 30. Bxf8 $17 Rxf8 31. Ng5
(31. Rd1 b5 $17) 31... Bg7 (31... b5 32. Rd1 $17) 32. Re1 (32. Qd7 Qa8 $17)
32... b5 33. Qd7 $2 (33. Rc1 h6 34. Nf3 Qa3 $19) 33... Qc4 (33... b4 $142 $19 {
keeps an even firmer grip}) 34. Re8 $4 {terrible, but the game is lost in any
case} (34. h4 $142 b4 35. Qa4 $19) 34... Qc1+ $19 35. Kg2 Qxg5 0-1

[Event "Hokkaido Chess Championship 2020"]
[Site "?"]
[Date "2020.03.21"]
[Round "2.1"]
[White "Takeuchi, Hiroshi"]
[Black "Sugimoto, Koichi"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "1343"]
[BlackElo "2021"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "96"]
[EventDate "2020.03.21"]
[EventRounds "5"]
[EventCountry "JPN"]

{D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4} 1. d4
d5 2. Nf3 Nf6 3. Bf4 c5 4. e3 Nc6 5. Be2 Qb6 {Black threatens to win material:
Qb6xb2} (5... Bg4 6. O-O e6 7. c4 cxd4 8. Nxd4 Bxe2 9. Nxe2 dxc4 10. Nd2 Nd5
11. Nxc4 Nxf4 12. Nxf4 Be7 13. Qb3 Qc7 14. Rac1 O-O 15. Nd2 Bd6 16. Nf3 Rac8
17. Ne2 Rfd8 18. Rc3 Qd7 19. Qa4 Rc7 20. Qe4 {Mitkov,N (2525)-Shulman,Y (2627)
Wheeling 2011 1/2-1/2}) 6. Qc1 $146 (6. Nc3 Bg4 (6... c4 7. Rb1 Bf5 8. a3 e6 9.
Ne5 Nxe5 10. Bxe5 Nd7 11. Bg3 Qc6 12. O-O Be7 13. Bf3 O-O 14. Re1 Nf6 15. Bh4
Rfd8 16. g4 Bg6 17. Bg3 h6 18. Kg2 b5 19. Ne2 Ne4 20. Bxe4 Bxe4+ 21. f3 {
Vo Thi Kim,P (2155)-Nandhidhaa,P (2176) Tashkent 2012 1-0 (61)}) (6... a6 7.
dxc5 (7. O-O e6 8. Na4 Qa5 9. Nxc5 Bxc5 10. dxc5 Qxc5 11. Ne5 O-O 12. Nxc6 bxc6
13. c4 a5 14. Rc1 Qb6 15. Be5 Nd7 16. Bd4 Qb4 17. Bc3 Qb6 18. cxd5 cxd5 19. Qa4
Rd8 20. Rfd1 Bb7 21. Qb5 Ba6 {Danielian,E (2428)-Zimina,O (2408) Dresden 2004
1-0 (53)}) 7... Qxc5 8. O-O Bf5 9. Nd4 Nxd4 10. exd4 Qb4 11. Bd3 Bg6 12. a3 Qb6
13. Rc1 e6 14. Na4 Qc6 15. c4 Bxd3 16. cxd5 Qb5 17. Nc3 Qc4 18. b3 Qxd4 19. Be3
Qe5 20. Qxd3 Ng4 21. g3 {Martini,B (2276)-Varga,Z (2515) Balatonlelle 2006 0-1}
) 7. O-O cxd4 8. Nb5 Rc8 9. Nbxd4 Nxd4 10. Nxd4 Bxe2 11. Nxe2 e6 12. c3 a6 13.
Qa4+ Qc6 14. Qb3 Be7 15. Nd4 Qd7 16. Nf3 Ne4 17. Rfd1 Nc5 18. Qc2 Qa4 19. Qe2
Qc4 20. Qxc4 dxc4 {Cruz,A (2287)-Korneev,O (2594) Villa de Deifontes 2005 0-1 
(57)}) (6. Nc3 $142 $5 {might be a viable alternative} Bf5 7. O-O Qxb2 8. Na4
Qxc2 9. Qxc2 Bxc2 10. Nxc5 $14) 6... cxd4 $15 7. exd4 Nxd4 8. Nxd4 Qxd4 {
White king safety dropped} 9. Be3 (9. Nc3 $5 e5 10. Bg3 $15) 9... Qb4+ $17 10.
c3 {White threatens to win material: c3xb4} Qa5 11. O-O e6 (11... e5 12. f4 e4
13. Nd2 $17) 12. Nd2 Be7 {Black is behind in development.} 13. c4 O-O 14. Nb3
Qc7 15. cxd5 Qxc1 16. Raxc1 Nxd5 17. Bc5 Bxc5 18. Rxc5 b6 19. Rcc1 Bb7 20. Nd4
(20. g3 Rac8 $17) 20... a6 (20... Nf4 $142 $5 21. f3 Rad8 $19) 21. Bf3 Rfc8 22.
a3 Kf8 23. h3 Ke7 24. Rce1 Kf8 25. Rc1 Rxc1 26. Rxc1 Rc8 27. Rxc8+ Bxc8 28. Kf1
Bb7 29. Ke1 Ke7 30. Kd2 Kd6 31. Ne2 Bc6 32. Ng3 (32. g4 h6 $17) 32... f5 33. h4
(33. Nf1 $142 $19) 33... Nf4 34. Bxc6 (34. Ke3 Nxg2+ 35. Bxg2 Bxg2 $19) 34...
Kxc6 35. Nh5 (35. h5 $19 {otherwise it's curtains at once}) 35... Nxh5 36. g3 (
36. Ke3 {doesn't change anything anymore} Kd5 $19) 36... Kd5 37. Kd3 e5 38. b3
Nf6 {[%cal Ye5e4] Black intends e4} 39. f3 e4+ 40. Ke3 (40. fxe4+ {does not
improve anything} Nxe4 41. Ke3 Nxg3 $19) 40... Nh5 41. fxe4+ (41. g4 {is one
last hope} fxg4 42. fxg4 $19) 41... fxe4 42. g4 Nf6 (42... Nf4 $142 $1 {
and Black can already relax} 43. h5 Ng2+ 44. Kf2 $19) 43. g5 Ng4+ 44. Kf4 e3
45. Kf3 Kd4 46. Ke2 Ne5 47. h5 Nd3 48. Kf3 (48. Kf1 {cannot change what is in
store for White} Ke4 49. Ke2 Nf4+ 50. Kd1 Kd3 51. Ke1 e2 52. Kf2 Nh3+ 53. Kf3
e1=Q 54. h6 Qe3+ 55. Kg2 Nf4+ 56. Kf1 Qe2+ 57. Kg1 Qg2#) 48... Nf4 (48... Nf4
49. a4 e2 50. Kf2 Kd3 51. Kg3 e1=Q+ 52. Kxf4 Qe3+ 53. Kg4 Ke4 54. g6 Qg1+ 55.
Kh4 Kf4 56. gxh7 Qg4#) 0-1

[Event "Hokkaido Chess Championship 2020"]
[Site "?"]
[Date "2020.03.21"]
[Round "2.2"]
[White "Yoshii, Yukihiko"]
[Black "Kikuchi, Daijiro"]
[Result "0-1"]
[ECO "D31"]
[WhiteElo "1824"]
[BlackElo "1198"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "78"]
[EventDate "2020.03.21"]
[EventRounds "5"]
[EventCountry "JPN"]

{D31: Queen's Gambit Declined: Semi-Slav without ...Nf6 (+ Marshall Gambit and
Noteboom) and Exchange Variation lines without ...Nf6} 1. c4 e6 2. d4 d5 3. Nc3
Bb4 4. cxd5 (4. Qb3 c5 5. dxc5 Nc6 6. a3 Qa5 7. Bd2 d4 8. Ne4 Bxd2+ 9. Nxd2 Nf6
10. Ngf3 Qxc5 11. Qb5 Qd6 12. g4 h6 13. g5 a6 14. Qb3 hxg5 15. Nxg5 Qf4 16. Rg1
Qxh2 17. Rg3 Qh6 18. Rh3 Nh5 {Azmaiparashvili,Z (2620)-Godena,M (2435) Reggio
Emilia 1992 0-1 (57)}) (4. Qa4+ Nc6 5. Nf3 dxc4 6. e3 Bd7 7. Qc2 b5 8. Be2 Nf6
9. O-O a6 10. a4 Na5 11. axb5 axb5 12. Ne5 O-O 13. Bf3 Rb8 14. Rd1 Nb3 15. Ra7
Bd6 16. g3 Qe7 17. Nc6 Bxc6 18. Bxc6 Nd5 {Mirzoev,A (2265)-Bagirov,R (2305)
Baku 1996 1-0}) 4... Bxc3+ $146 (4... Qxd5 5. Nf3 Nf6 6. Bd2 Bxc3 7. Bxc3 b6 8.
g3 Bb7 9. Bg2 Nbd7 10. O-O Qd6 11. Rc1 O-O 12. Qa4 a5 13. Bd2 c5 14. Bf4 Qe7
15. Rfd1 Nd5 16. Bg5 f6 17. Bd2 Ba6 18. e4 Nc7 19. Bf4 {Nei,I-Osnos,V
Leningrad 1963 1-0 (39)}) (4... exd5 $5 5. e3 Nf6 $11) 5. bxc3 $14 exd5 6. Nf3
Bg4 (6... Nc6 7. g3 $14) 7. h3 (7. Ne5 Bc8 $16) 7... Bxf3 8. exf3 Nf6 (8...
Qe7+ 9. Be3 Nf6 $16) 9. Bg5 (9. Ba3 $142 $5 $18) 9... O-O $14 {Black castles
and improves king safety} 10. Be2 Nbd7 11. O-O c6 {Controls b5} 12. c4 (12. Re1
Re8 $16) 12... dxc4 13. Bxc4 b5 {Black threatens to win material: b5xc4} 14.
Bb3 Qb6 15. Be3 Nd5 16. Qd2 (16. Bxd5 $5 cxd5 17. Qb3 $14) 16... a5 17. Bxd5
cxd5 18. Rac1 (18. Rfb1 Rab8 $11) 18... Rac8 19. Rc2 Rc4 {[%cal Rb6d4,Rc4d4,
Gd2d4,Ge3d4] Exerts pressure on the isolated pawn} 20. Rfc1 (20. a3 Qa6 $11)
20... Rfc8 $15 21. Qd3 Qg6 22. Qxg6 (22. Rxc4 dxc4 (22... Qxd3 $4 {Black goes
after material, which is his undoing} 23. Rxc8+ Nf8 24. Rb8 $18) (22... Rxc4 $6
23. Qa3 $11) (22... bxc4 $6 23. Qxg6 fxg6 24. Kf1 $15) 23. Qe4 h6 $15) 22...
hxg6 $17 23. Rxc4 Rxc4 {Black has new doubled pawns: g6+g7. Here comes the
goal-getter} (23... dxc4 24. d5 $17) 24. Kf1 Nb6 25. Ke2 Kf8 26. g4 (26. a3
Rxc1 27. Bxc1 Ke7 $11) 26... Ke7 27. h4 Na4 {Praise the knight!} 28. Kd2 b4 {
This push gains space} 29. Rxc4 $2 (29. Kd3 $142 $5 $15 {deserves consideration
}) 29... dxc4 $17 30. Kc2 $2 (30. d5 $142 $5 Nc3 31. Bd4 Nxa2 32. Bxg7 $19)
30... Kd6 31. f4 (31. Bf4+ Kd5 32. Bc7 Nc3 $19) 31... Nc3 32. a3 Kd5 33. axb4
axb4 34. g5 (34. Bd2 {no good, but what else?} Na2 35. Be1 Kxd4 36. Kb2 $19)
34... Ne2 35. f5 (35. Bd2 {a fruitless try to alter the course of the game}
Nxd4+ 36. Kb2 c3+ 37. Bxc3 bxc3+ 38. Kxc3 Ne2+ 39. Kb4 Nxf4 $19) 35... Nxd4+
36. Bxd4 (36. Kd2 c3+ 37. Kd3 $19) 36... Kxd4 37. f4 Ke4 38. h5 gxh5 39. f6 (
39. Kd2 {is not the saving move} Kxf4 40. f6 g6 41. Ke2 Ke4 42. Ke1 c3 43. Ke2
b3 44. Kf2 c2 45. Kg3 b2 46. Kf2 c1=Q 47. Kg3 Qh1 48. Kf2 b1=Q 49. Kg3 Qbe1#)
39... g6 (39... g6 40. Kd2 Kxf4 41. Ke2 Ke4 42. Ke1 c3 43. Ke2 b3 44. Kf1 Kf3
45. Kg1 b2 46. Kh1 Kg3 47. Kg1 b1=Q#) 0-1

[Event "Hokkaido Chess Championship 2020"]
[Site "?"]
[Date "2020.03.21"]
[Round "2.3"]
[White "Ito, Katsuhide"]
[Black "Sato, Yasuji"]
[Result "0-1"]
[ECO "C40"]
[WhiteElo "1257"]
[BlackElo "1512"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "52"]
[EventDate "2020.03.21"]
[EventRounds "5"]
[EventCountry "JPN"]

{C40: Latvian and Elephant Gambits} 1. e4 e5 2. Nf3 Bc5 3. c3 $146 (3. Nxe5 d6
4. Nf3 Be6 5. d4 Bb6 6. Nc3 Nf6 7. Bd3 O-O 8. O-O c5 9. d5 Bg4 10. Bf4 Re8 11.
h3 Bxf3 12. Qxf3 Nbd7 13. Bxd6 Rc8 14. Bb5 c4 15. Bxd7 Qxd7 16. e5 Bd4 17. Rfe1
Bxc3 {Mihalichenko,V (2407)-Tikhiy,S (2427) Azov 2010 1-0}) (3. Nxe5 $5 Nc6 4.
Nf3 $16) 3... d5 $14 4. d4 (4. exd5 Nf6 5. Nxe5 Qxd5 $14) 4... dxe4 5. dxc5 (5.
Nxe5 $5 {is an interesting idea} Bd6 6. Qb3 Bxe5 7. dxe5 $11) 5... Qxd1+ $15 6.
Kxd1 exf3 7. gxf3 {White has the pair of bishops} Nf6 8. Nd2 O-O {Black
castles and improves king safety} (8... Bf5 9. Rg1 $15) 9. Bd3 Rd8 10. Kc2 Nc6
11. Ne4 Nd5 12. Rg1 Kh8 13. Bg5 (13. Ng5 Rd7 14. Be4 Nf6 15. Bxc6 bxc6 $11)
13... f6 14. Bh4 Nf4 15. Rad1 (15. Bb5 Bf5 $15) 15... Be6 {Black threatens to
win material: Be6xa2} (15... Nxd3 16. Rxd3 Bf5 17. Bg3 $17) 16. Nxf6 $15 Nxd3
17. Rxd3 Rxd3 ({Worse is} 17... Bxa2 18. Rxd8+ Rxd8 19. Ne4 $16) 18. Kxd3 {
Opposite coloured bishops appeared} Bf5+ (18... Rf8 $142 $5 {and Black is
still in the game} 19. Ng4 Rxf3+ 20. Ne3 Bxa2 $15) 19. Ke3 Bg6 20. Nd7 (20. Nd5
Rc8 $16) 20... Re8 21. Bg3 $4 {[%cal Rd7e5,Rg3e5,Gc6e5,Ge8e5] Attacking the
isolated pawn on e5. a transit from better to worse} (21. b4 a6 $11) 21... Kg8
$4 {Black loses the upper hand} (21... Bf5 $142 22. Rd1 Rd8 $19) 22. f4 $4 {
allows the opponent back into the game} (22. b4 $142 $11 {the rescuing straw})
22... exf4+ $19 23. Kxf4 Re4+ (23... Re7 $5 {makes it even easier for Black}
24. Rd1 Be8 25. Nb6 cxb6 26. cxb6 axb6 27. Rd2 $19) 24. Kf3 Re7 25. Rd1 $4 {
sad, but how else could White save the game?} (25. Bxc7 $142 Rxd7 26. Bd6 $19)
25... Bh5+ 26. Kg2 Bxd1 0-1

[Event "Hokkaido Chess Championship 2020"]
[Site "?"]
[Date "2020.03.21"]
[Round "2.4"]
[White "Nakamura, Mitsuru"]
[Black "Yoshida, So"]
[Result "1-0"]
[ECO "B08"]
[WhiteElo "1325"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "45"]
[EventDate "2020.03.21"]
[EventRounds "5"]
[EventCountry "JPN"]

{B08: Pirc Defence: Classical System} 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7
5. Be2 O-O 6. O-O c6 7. h3 Nbd7 8. Be3 Qc7 (8... b5 9. a3 Bb7 10. e5 Ne8 11. e6
fxe6 12. Ng5 Nc7 13. Bg4 e5 14. Be6+ Kh8 15. f4 exd4 16. Bxd4 c5 17. Bxg7+ Kxg7
18. Bd5 Bxd5 19. Nxd5 Rf6 20. Nxf6 Nxf6 21. Qf3 h6 22. Rae1 Rb8 23. Ne6+ {
Solomon,S (2404)-Froehlich,P (2397) Victoria 2004 1-0 (33)}) 9. Qd2 e5 (9... b5
10. a3 Bb7 11. Bh6 a6 12. Bxg7 Kxg7 13. Qe3 e5 14. dxe5 dxe5 15. Rad1 Rfe8 16.
Nh2 Rad8 17. Ng4 Nxg4 18. hxg4 Nf8 19. f3 Qe7 20. g3 Ne6 21. Kg2 Rd4 22. Nb1 c5
23. Rh1 Ng5 24. c3 {Anarkulov,A (2167)-Georgiev,V (2358) St Gallen 2008 1/2-1/
2 (42)}) 10. d5 $146 (10. dxe5 Nxe5 11. Nxe5 dxe5 12. Rad1 Be6 13. Qd6 Ne8 14.
Qxc7 Nxc7 15. f3 Bf6 16. Rd2 Be7 17. a3 b6 18. Rfd1 f6 19. Kf2 Rfd8 20. Rxd8+
Rxd8 21. Rxd8+ Bxd8 {1/2-1/2 (21) Drtina,M (2260)-Veselsky,J (2200) Trnava 1988
}) (10. dxe5 $5 Nxe5 11. Rad1 $16) 10... cxd5 $11 11. exd5 a6 {Secures b5} 12.
Rab1 (12. a4 $5 $11 {must be considered}) 12... b5 $15 13. a3 {Black has a
cramped position} Bb7 14. Rfd1 (14. Rbd1 Rac8 $15) 14... Nb6 $17 15. Bxb6 Qxb6
16. Qg5 (16. Nh2 Rfe8 $17) 16... Nh5 (16... Rac8 17. Qe3 Qxe3 18. fxe3 $19) 17.
Nh2 (17. Qe3 $142 $5 {has some apparent merit} Qxe3 18. fxe3 $15) 17... Nf4 $17
18. Bf3 Rac8 19. Ng4 (19. Nf1 $142 $17) 19... Rfe8 $4 {letting the wind out of
his own sails} (19... f6 20. Qh4 $19) 20. Re1 $2 (20. Nf6+ Bxf6 21. Qxf6 Rc4
$15) 20... Qc5 $4 {gives the opponent counterplay} (20... Qd8 $142 $5 21. Qxd8
Rexd8 $17) 21. Rbd1 (21. Ne4 $142 Qc7 22. Ngf6+ Bxf6 23. Nxf6+ Kg7 24. Nxe8+
Rxe8 25. c3 $14) 21... b4 $4 {with this move Black loses his initiative} (21...
f5 $142 22. Nh6+ Kf8 $15) 22. Ne4 $16 Nxd5 $4 {strolling merrily down the path
to disaster} (22... Qc7 23. axb4 Rf8 (23... Qxc2 $4 {A poison bait which
should not be taken} 24. Nxd6 Rb8 25. Nxe8 (25. Nxe5 $6 {succumbs to} Ne2+ 26.
Bxe2 Rxe5 $11) 25... Rxe8 26. d6 Bxf3 27. d7 $18) (23... Nxd5 $4 {That pawn is
poisoned} 24. Rxd5 Bxd5 25. Nef6+ Bxf6 26. Nxf6+ Kg7 27. Bxd5 $18 (27. Nxd5 $6
Qxc2 28. Qf6+ Kg8 $18)) 24. Ngf6+ Bxf6 25. Nxf6+ Kg7 $16) 23. Nxc5 $18 (23.
Nxc5 Rxc5 24. axb4 Nxb4 25. Bxb7 $18) 1-0

[Event "Hokkaido Chess Championship 2020"]
[Site "?"]
[Date "2020.03.21"]
[Round "3.1"]
[White "Kikuchi, Daijiro"]
[Black "Sugimoto, Koichi"]
[Result "1-0"]
[ECO "D00"]
[WhiteElo "1198"]
[BlackElo "2021"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "57"]
[EventDate "2020.03.21"]
[EventRounds "5"]
[EventCountry "JPN"]

{D00: 1 d4 d5: Unusual lines} 1. d4 d5 2. Bf4 Nf6 3. e3 c5 4. c3 Nc6 5. Nd2 Qb6
6. Qc2 (6. Qb3 c4 7. Qc2 Bg4 8. Ngf3 e6 9. h3 Bf5 10. Qc1 h6 11. Be2 g5 12. Bg3
Bg7 13. b3 cxb3 14. axb3 O-O 15. O-O Ne4 16. Nxe4 Bxe4 17. Nd2 e5 18. Nxe4 dxe4
19. d5 Ne7 20. Rd1 f5 {Johannesson,I (2368)-Ragnarsson,D (2347) Reykjavik 2015
1-0 (46)}) 6... Bg4 (6... g6 7. Ngf3 Bg7 8. Be2 Bf5 9. dxc5 Qxc5 10. Qb3 Qb6
11. Qxb6 axb6 12. O-O O-O 13. Bc7 Nd7 14. Nd4 Rfc8 15. Bg3 Nc5 16. Nxf5 gxf5
17. Nb3 Na4 18. Rab1 Nc5 19. Ra1 Na4 {1/2-1/2 (19) Sedlak,N (2582)-Georgiev,V 
(2572) Neum 2008}) 7. Be2 $146 (7. Ngf3 e6 8. Bd3 (8. dxc5 Bxc5 9. Bd3 Bh5 10.
O-O Bg6 11. Ne5 Nxe5 12. Bxe5 Bxd3 13. Qxd3 Be7 14. a4 O-O 15. a5 Qc6 16. Nf3
Rfc8 17. Bd4 Nd7 18. Ne5 Nxe5 19. Bxe5 Bd6 20. Bxd6 Qxd6 21. e4 Rd8 22. Rfd1
Qc7 {Szabolcsi,J (2402)-Vegh,E (2303) Hungary 2007 1-0 (63)}) 8... Rc8 9. a3
Nh5 10. Bg5 h6 11. Bh4 g5 12. Bg3 Nxg3 13. hxg3 Bg7 14. Nh2 h5 15. Nxg4 hxg4
16. Rxh8+ Bxh8 17. Qb1 cxd4 18. cxd4 Nxd4 19. exd4 Bxd4 20. Nf1 Bxb2 21. Ne3
Rc1+ {Gareev,T (2570)-Hammer,J (2457) ICC INT 2008 0-1}) (7. h3 Bh5 8. Ngf3 e6
9. Be2 Be7 10. O-O O-O 11. dxc5 Bxc5 12. Bd3 Bg6 13. Bxg6 hxg6 14. Rad1 Rfd8
15. Bg5 Rac8 16. Qb1 Be7 17. c4 dxc4 18. Nxc4 Qc5 19. Ncd2 Ne5 20. Nxe5 Qxe5
21. Nf3 Qa5 {Halak,M (2234)-Marzano,C (2166) Krakow 2014 0-1 (58)}) (7. dxc5
Qxc5 8. Ngf3 g6 $11) 7... Bxe2 8. Nxe2 e6 9. Nf3 Be7 10. Ne5 Rc8 11. O-O O-O
12. Bg5 cxd4 (12... Rfd8 13. Nxc6 Rxc6 14. f3 $11) 13. Bxf6 {White wins a piece
} Bxf6 ({Less advisable is} 13... gxf6 14. Nd7 Qb5 15. Nxf8 $16) 14. Nd7 {
White threatens to win material: Nd7xb6. White forks: b6+f8} Qd8 15. Nxf8 Qxf8
16. Nxd4 Nxd4 17. exd4 Bxd4 {White wins the exchange} 18. Qb3 {White threatens
to win material: Qb3xb7} Bb6 19. a4 Qd6 20. Rad1 Qc7 21. h3 g6 22. Qb5 a6 {
Black threatens to win material: a6xb5} 23. Qd3 Ba7 24. Rfe1 Bb8 25. g3 h5 (
25... Qb6 26. Rb1 $11) 26. h4 Qa5 $4 (26... Ba7 $142 $14 {was a good chance to
save the game}) 27. Rxe6 $3 $18 {very forceful play.} Kg7 (27... fxe6 28. Qxg6+
Kf8 (28... Kh8 29. Qh6+ Kg8 30. Qxe6+ {Combination}) 29. Qf6+ Ke8 (29... Kg8
30. Qxe6+ {Combination}) 30. Qxe6+ {Double attack}) 28. Qd4+ Kg8 29. Re7 (29.
Re7 Qd8 30. Qf6 $18) 1-0

[Event "Hokkaido Chess Championship 2020"]
[Site "?"]
[Date "2020.03.21"]
[Round "3.2"]
[White "Takeuchi, Hiroshi"]
[Black "Yoshii, Yukihiko"]
[Result "1-0"]
[ECO "D02"]
[WhiteElo "1343"]
[BlackElo "1824"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "65"]
[EventDate "2020.03.21"]
[EventRounds "5"]
[EventCountry "JPN"]

{D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4} 1. d4
d5 2. Nf3 Nf6 3. Bf4 h6 $146 {Covers g5} (3... Nbd7 4. Nc3 (4. e3 c5 5. c3 Qb6
6. Qc2 g6 7. Nbd2 Bg7 8. h3 O-O 9. Be2 Ne4 10. O-O Nxd2 11. Qxd2 Nf6 12. b4 Ne4
13. Qb2 a5 14. a3 Bf5 15. Rfb1 cxb4 16. cxb4 axb4 17. axb4 Nd6 18. Rc1 Rxa1 {
Sahovic,D (2450)-Skembris,S (2400) Vrnjacka Banja 1982 1/2-1/2 (31)}) 4... c6
5. e3 e6 6. Bd3 Bb4 7. O-O h6 8. Qe2 O-O 9. e4 Bxc3 10. bxc3 dxe4 11. Bxe4 Nxe4
12. Qxe4 Nf6 13. Qd3 Nd5 14. Bd2 Ne7 15. Rfe1 Ng6 16. Ne5 Nxe5 17. Rxe5 f6 18.
Re3 {Lasker,E-Chigorin,M St Petersburg 1896 1-0 (55)}) (3... g6 4. c3 Bg7 5. e3
(5. h3 O-O 6. Nbd2 b6 7. e3 c5 8. b4 Bb7 9. bxc5 bxc5 10. Qa4 Nbd7 11. Be2 Ne4
12. Nxe4 dxe4 13. Nd2 cxd4 14. cxd4 e5 15. dxe5 Nxe5 16. Bxe5 Bxe5 17. Rd1 Qe8
{1/2-1/2 (17) Dresen,U (2300)-Brueckner,T (2345) Germany 1987}) 5... O-O 6.
Nbd2 b6 7. Bd3 Bb7 8. O-O c5 9. Qe2 e6 10. h3 Qe7 11. a3 Nfd7 12. e4 Re8 13.
Rfe1 cxd4 14. cxd4 dxe4 15. Nxe4 Nf6 16. Nd6 Rd8 17. Nxb7 Qxb7 18. Rac1 {
Szekely,P (2465)-Beliavsky,A (2645) Hungary 1998 1/2-1/2}) (3... Nh5 4. Be3 c6
5. g3 Bf5 6. Nbd2 h6 7. Bg2 Qb6 8. Qc1 Nd7 9. O-O e6 10. c4 Be7 11. h3 Nhf6 12.
Re1 a5 13. a3 a4 14. Bf4 O-O 15. g4 Bh7 16. c5 Qa7 17. Ne5 Nxe5 18. Bxe5 {
Tologontegin,S (2354)-Mandiza,F (2388) Tromso 2014 1-0 (76)}) 4. e3 Bf5 5. Nc3
e6 6. h3 {Prevents intrusion on g4} (6. Bd3 Bxd3 7. cxd3 Nc6 $14) 6... Bb4 $11
7. a3 Bxc3+ 8. bxc3 Ne4 9. c4 (9. Qb1 b6 $11) 9... b6 (9... g5 $5 10. Bh2 c5
11. cxd5 exd5 12. Bb5+ Nd7 $11) 10. Bd3 $14 O-O 11. O-O Nd7 (11... dxc4 12.
Bxc4 Nd7 13. Bd3 $14) 12. Bxe4 (12. cxd5 $5 exd5 13. c4 $16) 12... Bxe4 13.
cxd5 Bxd5 {Opposite coloured bishops appeared} 14. Re1 Nf6 (14... Qf6 15. c4
Bb7 16. Rc1 $11) 15. Ne5 $14 Rc8 16. c4 Ba8 17. Rc1 c5 18. dxc5 (18. Re2 Qe7
$11) 18... Rxc5 19. Qa4 {White threatens to win material: Qa4xa7} (19. Qb3 Qe7
$11) 19... Qe7 (19... Qc7 20. Nd3 Qc6 21. Qxc6 Rxc6 22. f3 $11) 20. Red1 Qb7 (
20... Rfc8 $5 $11) 21. f3 $14 {Prevents intrusion on e4+g4} Ra5 {Black
threatens to win material: Ra5xa4} 22. Qb4 Rc8 23. Rd3 (23. e4 Nh5 24. Bh2 Nf6
$16) 23... Rac5 (23... Nd5 $5 {is noteworthy} 24. Qd2 Qc7 $14) 24. Rcd1 $16 a5
$2 (24... Re8 25. Rd8 Qe7 26. R8d4 $16) 25. Qa4 (25. Rd8+ $142 Ne8 26. Qa4 b5
27. cxb5 Kh7 $18) 25... Qa6 $4 {causes even greater problems} (25... Qe7 $142
$16) 26. Rd8+ $18 Kh7 27. Qc2+ g6 (27... Ne4 {does not save the day} 28. R1d4
Rxd8 29. Rxd8 $18) 28. Qd3 (28. R1d7 Nxd7 29. Rxd7 Be4 30. Qxe4 Rg8 31. Rxf7+
Kh8 32. Qd4 Rg7 33. Nxg6+ Kg8 34. Rxg7#) 28... Bc6 $4 {Black crumbles in face
of a dire situation} (28... Rd5 29. Rxd5 exd5 $18) 29. Qd6 Rxd8 30. Qxd8 Kg7 (
30... Qa8 {a last effort to resist the inevitable} 31. Qxf6 Qf8 32. Nxc6 Qg7
33. Qxg7+ Kxg7 34. Be5+ f6 35. Rd7+ Kg8 36. Ne7+ Kf8 37. Bxf6 Ke8 $18) 31. Qe7
(31. Bxh6+ Kxh6 32. Qh8+ Kg5 33. Nxf7+ Kf5 34. g4+ Nxg4 35. hxg4#) 31... Be8
32. Rd8 Nd7 (32... Qxc4 {doesn't get the cat off the tree} 33. Rxe8 Qf1+ 34.
Kxf1 Rc1+ 35. Ke2 Rc2+ 36. Kd1 Rc1+ 37. Kxc1 Nxe8 38. Qxf7+ Kh8 39. Nxg6#) 33.
Qxe8 (33. Qxe8 Nf8 34. Qxf8+ Kf6 35. Qxf7#) 1-0

[Event "Hokkaido Chess Championship 2020"]
[Site "?"]
[Date "2020.03.21"]
[Round "3.3"]
[White "Sato, Yasuji"]
[Black "Nakamura, Mitsuru"]
[Result "1-0"]
[ECO "C56"]
[WhiteElo "1512"]
[BlackElo "1325"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "35"]
[EventDate "2020.03.21"]
[EventRounds "5"]
[EventCountry "JPN"]

{C56: Two Knights: 4 d4 exd4 5 0-0 Nxe4} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 $146 (
3... Nf6 4. d4 exd4 5. e5 Ne4 6. O-O d5 (6... Nc5 7. Nxd4 Nxd4 8. Qxd4 d6 9.
Bf4 d5 10. Qxd5 Qxd5 11. Bxd5 Bf5 12. b4 c6 13. bxc5 cxd5 14. Nc3 O-O-O 15.
Rfd1 Bxc5 16. Rxd5 Rxd5 17. Nxd5 Rd8 18. c4 Be6 19. Rc1 Bxd5 20. cxd5 Rxd5 21.
Be3 {Kuzmin,G (2535)-Romanishin,O (2610) Tallinn 1979 1/2-1/2 (38)}) 7. Bb5 (7.
exd6 Nxd6 8. Bd5 Be7 9. Bxc6+ bxc6 10. Nxd4 Qd7 11. Nc3 O-O 12. Qf3 Bf6 13. Rd1
Qg4 14. Qxg4 Bxg4 15. f3 Bd7 16. Na4 Nf5 17. Nb3 Be6 18. Bf4 g5 19. Bd2 Rfd8
20. Kf2 Bxb3 21. axb3 Nd4 {Pap,M (2504)-Pancevski,F (2473) Jahorina 2012 1-0})
7... Bg4 8. h3 Bxf3 9. Qxf3 a6 10. Bxc6+ bxc6 11. Nd2 Ng5 12. Qd3 Ne6 13. f4 g6
14. f5 gxf5 15. Qxf5 Qd7 16. Nf3 h6 17. Bd2 c5 18. Nh2 {Pachman,L-Gligoric,S
Leipzig 1960 0-1 (41)}) 4. O-O Nf6 5. d4 exd4 (5... Bxd4 6. Nxd4 Nxd4 7. Nc3
$11) 6. e5 {White threatens to win material: e5xf6} Ne4 $4 (6... Ng4 $142 {
would bring relief} 7. Bf4 O-O $11) 7. Re1 $18 Nxf2 8. Kxf2 d3+ $6 {puts up no
fight} (8... O-O 9. Bg5 Be7 10. Bxe7 Qxe7 11. Nbd2 $18) 9. Kf1 dxc2 10. Qxc2
Nd4 (10... O-O {hardly improves anything} 11. Nc3 d6 12. Bg5 $18) 11. Nxd4 Bxd4
12. Bxf7+ $1 {Double attack: d4/f7.} Kxf7 13. Qc4+ Ke8 (13... d5 {desperation}
14. Qxd4 c6 $18) 14. Qxd4 Qe7 (14... b6 {does not help much} 15. Nc3 Bb7 16.
Ne4 $18) 15. Nc3 c6 16. Ne4 Kd8 (16... h6 {the only chance to get some
counterplay} 17. Kg1 b6 $18) 17. Bg5 Rf8+ 18. Kg1 (18. Kg1 Qxg5 19. Nxg5 $18)
1-0

[Event "Hokkaido Chess Championship 2020"]
[Site "?"]
[Date "2020.03.21"]
[Round "3.4"]
[White "Yoshida, So"]
[Black "Ito, Katsuhide"]
[Result "1-0"]
[ECO "A04"]
[BlackElo "1257"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "57"]
[EventDate "2020.03.21"]
[EventRounds "5"]
[EventCountry "JPN"]

{A04: Unusual lines after 1 Nf3 and King's Indian Attack} 1. Nf3 d6 2. g3 Nc6
$146 (2... Bg4 3. Bg2 e6 (3... Qc8 4. c4 Bh3 5. Bxh3 Qxh3 6. Qb3 b6 7. d4 Nf6
8. Nc3 g6 9. Bg5 Bg7 10. Bxf6 Bxf6 11. Nd5 Qd7 12. Nxf6+ {1/2-1/2 (12) Meduna,
E (2515)-Pribyl,J (2455) Debrecen 1987}) 4. O-O Nf6 5. d3 Be7 6. c4 c6 7. Nc3
O-O 8. Rb1 d5 9. e4 dxe4 10. dxe4 a5 11. Qb3 Bxf3 12. Bxf3 Qc7 13. Be3 Nfd7 14.
Na4 Na6 15. Nb6 Rad8 16. Nxd7 Rxd7 17. Bb6 {Fekete,A (2355)-Spiridonov,N (2420)
Myslenice 1987 0-1 (47)}) (2... c6 3. Bg2 e5 4. d3 f5 5. c4 Nf6 6. Nc3 a5 7.
O-O g6 8. b3 Bg7 9. Bb2 O-O 10. a3 h6 11. b4 Re8 12. e3 Be6 13. Qc2 Bf7 14.
Rfd1 Nbd7 {1/2-1/2 (14) Medic,M (2285)-Zamostni,J (2245) Samobor 1998}) (2...
g6 3. e4 Bg7 4. Bg2 e5 5. O-O Nc6 6. c3 Nf6 7. d3 O-O 8. b4 a6 9. a4 Ne8 10.
Re1 Kh8 11. Na3 f5 12. exf5 Bxf5 13. d4 exd4 14. Bg5 Nf6 15. b5 axb5 16. axb5
Ne5 17. Nxd4 {Degenhardt,H (2310)-Bretsnajdr,V (2310) Frankfurt 1989 1/2-1/2 
(34)}) 3. Bg2 Nf6 4. O-O e6 5. d3 {Consolidates e4} Be7 6. c3 {Controls b4+d4}
(6. d4 O-O $14) 6... O-O $11 7. Nbd2 Re8 8. e4 e5 9. d4 Bg4 10. Qc2 d5 $2 (
10... exd4 $142 {and Black could well hope to play on} 11. cxd4 g6 $14) 11.
Nxe5 $16 Nxe5 12. dxe5 dxe4 $4 {but even a better move would not have saved
the game} (12... Nd7 $142 13. f4 Bc5+ 14. Kh1 d4 $18) 13. exf6 $18 Bxf6 14.
Nxe4 c6 15. Nxf6+ Qxf6 16. Bf4 Re2 17. Qb3 b5 (17... Qe7 {is not the saving
move} 18. Be3 $18) 18. Rfe1 Rae8 (18... Rxe1+ {does not improve anything} 19.
Rxe1 g5 20. Bc1 $18) 19. Rxe2 Rxe2 (19... Bxe2 {doesn't get the cat off the
tree} 20. Qa3 $18) 20. Qa3 (20. Qd1 $5 {seems even better} Qe7 21. Bf1 h5 $18)
20... g5 (20... h6 {does not save the day} 21. Qxa7 Bf5 22. Qb7 $18) 21. Be3
Bf3 (21... Qe6 {cannot change what is in store for White} 22. Qxa7 Qd7 23. Qb6
$18) 22. Qxa7 Rxb2 (22... Qf5 {what else?} 23. Bf1 h6 24. Qa8+ Kh7 $18) 23.
Qa8+ Kg7 24. Bd4 Bxg2 25. Bxf6+ Kxf6 26. Kxg2 b4 27. Qxc6+ Kf5 (27... Kg7 {
does not help much} 28. Qb5 Kh6 29. Rd1 Re2 30. Qxe2 Kg7 31. Rd6 b3 32. Qe5+ f6
33. Qxf6+ Kg8 34. Rd8#) 28. cxb4 (28. g4+ Ke5 29. Re1+ Re2 30. Rxe2+ Kf4 31.
Re4#) 28... Rxb4 (28... g4 {doesn't do any good} 29. Qe8 f6 30. Rd1 Re2 31.
Qxe2 Kg5 32. Rd5+ Kg6 33. Qxg4+ Kf7 34. Rd7+ Kf8 35. Qe4 f5 36. Qa8#) 29. Qc5+
(29. Qc5+ Kg6 30. Qxb4 Kg7 31. Qe7 h5 32. Rd1 h4 33. Qxg5+ Kh7 34. gxh4 Kh8 35.
Qh6+ Kg8 36. Rd8#) (29. Rc1 Rb5 30. g4+ Ke5 31. Rd1 Rb2 32. Qd6+ Ke4 33. Qd4#)
1-0

[Event "Hokkaido Chess Championship 2020"]
[Site "?"]
[Date "2020.03.22"]
[Round "4.1"]
[White "Kikuchi, Daijiro"]
[Black "Takeuchi, Hiroshi"]
[Result "1/2-1/2"]
[ECO "B08"]
[WhiteElo "1198"]
[BlackElo "1343"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "76"]
[EventDate "2020.03.21"]
[EventRounds "5"]
[EventCountry "JPN"]

{B08: Pirc Defence: Classical System} 1. d4 Nf6 2. Bf4 g6 3. Nf3 Bg7 4. Nc3 d6
5. e4 O-O 6. Qd2 Nbd7 (6... Nc6 7. Bh6 e5 8. Bxg7 Kxg7 9. d5 Nb8 10. O-O-O Nbd7
11. Qe3 Qe7 12. Nd2 Nb6 13. Nb3 c6 14. dxc6 bxc6 15. Na5 Bd7 16. f4 Ng4 17. Qf3
exf4 18. Nxc6 Qh4 19. Qxf4 Bxc6 20. Kb1 h5 21. Ba6 {Kogan,A (2495)-Finkel,A 
(2490) Biel 1995 0-1 (44)}) 7. Bc4 $146 (7. O-O-O c5 (7... c6 8. e5 dxe5 9.
dxe5 Ng4 10. h3 Ngxe5 11. Nxe5 {1-0 (11) Meshcheriakova,E (2320)-Kariakina,M 
(2171) Essentuki 2003}) 8. Bh6 cxd4 9. Nxd4 Nc5 10. f3 Bd7 11. h4 Nh5 12. Nde2
f5 13. exf5 gxf5 14. g4 fxg4 15. Qd5+ Be6 16. Qxh5 Rxf3 17. Bxg7 Kxg7 18. Nd4
Rf6 19. Nxe6+ Nxe6 20. Bd3 Rh6 21. Qxg4+ Kh8 {Kharitonov,A (2538)-Belov,V 
(2313) Peterhof 2010 1-0}) (7. Rd1 c6 8. e5 Ne8 9. Bc4 Nb6 10. Be2 Bg4 11. O-O
Bxf3 12. Bxf3 dxe5 13. dxe5 Qxd2 14. Rxd2 Nc7 15. b3 Rfd8 16. Rfd1 Rxd2 17.
Rxd2 Ne6 18. Bg3 h5 19. h3 Kf8 20. a4 a5 21. Be2 Bh6 {Szabo,G (2234)-Kevei,P 
(2162) Hungary 2006 0-1 (54)}) (7. e5 Nh5 8. O-O-O Nxf4 9. Qxf4 dxe5 10. dxe5
c6 $11) 7... c5 {Black has a cramped position. Black's piece can't move: c8} 8.
O-O $4 {throwing away the advantage} (8. d5 $142 $11 {and White can hope to
survive}) 8... cxd4 $19 9. Nd5 Nxd5 (9... Nxe4 $142 $5 10. Qe2 Ndf6 $19) 10.
Bxd5 $17 e5 11. Bh6 (11. Bg5 Nf6 $17) 11... Nb6 12. Bb3 Bg4 13. Bxg7 Kxg7 14.
Ng5 f6 15. f3 fxg5 (15... Bd7 16. Ne6+ Bxe6 17. Bxe6 $17) 16. fxg4 {White king
safety dropped.} Qe7 17. c3 dxc3 18. bxc3 (18. Qxc3 Rac8 19. Qe3 Nc4 20. Bxc4
Rxc4 21. Rxf8 Qxf8 $17) 18... Rad8 (18... Nd7 19. g3 $17) 19. Rad1 $15 h6 (
19... Rf4 20. g3 Rxf1+ 21. Rxf1 $15) 20. g3 (20. Rxf8 Rxf8 (20... Qxf8 $143 21.
Rf1 Qe7 22. Rf7+ Qxf7 23. Bxf7 Kxf7 24. a4 $16) 21. Qxd6 Qxd6 22. Rxd6 Rf6 $11)
20... Qd7 (20... Rxf1+ $142 $5 21. Rxf1 Rf8 $17) 21. Rxf8 $11 Rxf8 ({Weaker is
} 21... Kxf8 22. Rf1+ Kg7 23. Rf7+ Qxf7 24. Bxf7 Kxf7 25. a4 $16) 22. Qxd6 Qxd6
23. Rxd6 Rf3 {Black threatens to win material: Rf3xc3} (23... Rf6 $5 {looks
like a viable alternative} 24. Rd3 Rc6 $11) 24. Re6 $16 {White threatens to
win material: Re6xe5} Rxc3 25. Rxe5 {White has a new passed pawn: e4} (25. Re7+
$5 Kh8 26. Rxb7 $16) 25... Rc1+ 26. Kf2 Rc7 27. Re8 a5 28. Re6 Nc4 29. Bxc4
Rxc4 {A rook endgame occured} 30. Re7+ {White forks: b7} Kf6 {Black threatens
to win material: Kf6xe7} 31. Rxb7 Rxe4 32. Kf3 Re1 (32... Ra4 33. Rb6+ Ke5 34.
Rxg6 Ra3+ 35. Kg2 Rxa2+ 36. Kh3 $11) 33. Ra7 {White threatens to win material:
Ra7xa5} Re5 34. a4 Ke6 35. Ra6+ Kf7 36. Ra7+ Kf6 37. Ra6+ Kf7 {Twofold
repetition} 38. Ra7+ Kf6 1/2-1/2

[Event "Hokkaido Chess Championship 2020"]
[Site "?"]
[Date "2020.03.22"]
[Round "4.2"]
[White "Sugimoto, Koichi"]
[Black "Sato, Yasuji"]
[Result "1-0"]
[ECO "D30"]
[WhiteElo "2021"]
[BlackElo "1512"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "61"]
[EventDate "2020.03.21"]
[EventRounds "5"]
[EventCountry "JPN"]

{D30: Queen's Gambit Declined: Systems without Nc3} 1. d4 d5 2. c4 Nf6 3. Nf3
e6 4. Bg5 h6 5. Bh4 b6 $146 (5... Bb4+ 6. Nbd2 dxc4 (6... O-O 7. e3 Nbd7 8. a3
Be7 9. cxd5 exd5 10. Qc2 a5 11. Bd3 Re8 12. Bg3 c6 13. h3 Nb6 14. O-O Be6 15.
Rab1 Nc8 16. Ne5 Nd6 17. f3 Nd7 18. f4 Nf8 19. f5 Bc8 20. Rbe1 Nh7 21. Bf4 {
Matsuura,E (2499)-Feliciano Ebert,V (2240) Matinhos 2015 1/2-1/2}) (6... c5 7.
e3 g5 8. Bg3 g4 9. a3 Ba5 10. Ne5 Bxd2+ 11. Qxd2 Ne4 12. Qc2 Qa5+ 13. Ke2 Nc6
14. f3 Nxg3+ 15. hxg3 cxd4 16. Nxc6 bxc6 17. b4 Qb6 18. c5 Qc7 19. f4 Ba6+ 20.
Ke1 Bxf1 21. Kxf1 {Lasker,E-Marshall,F USA 1923 1/2-1/2 (63)}) 7. a3 Ba5 8. e3
(8. Bxf6 Qxf6 9. Qa4+ Nc6 10. Qxc4 Bxd2+ 11. Kxd2 O-O 12. e3 e5 13. dxe5 Rd8+
14. Ke1 Nxe5 15. Nxe5 Qxe5 16. Qc3 Qg5 17. f4 Qd5 18. Kf2 Qd2+ 19. Be2 Bg4 20.
Rhe1 Qxc3 21. bxc3 Rd2 22. h3 Bxe2 {Spiridonov,N (2420)-Schinzel,W (2380)
Polanica Zdroj 1981 0-1 (55)}) 8... b5 9. Bxf6 gxf6 10. Qc2 a6 11. Be2 Bb7 12.
O-O O-O 13. Rfd1 Nd7 14. e4 Qe7 15. Nf1 c5 16. d5 Rfd8 17. Ne3 Bc7 18. g3 Ne5
19. Nh4 Ng6 20. Nxg6 {Maki Uuro,M (2407)-Mastrovasilis,D (2577) Turin 2006 0-1
(34)}) (5... dxc4 $5 6. e3 b5 $11) 6. cxd5 g5 (6... Qxd5 $5 7. Nc3 Bb4 $11) 7.
Bg3 $16 Nxd5 8. Be5 (8. e4 $142 $5 Nf4 9. Nc3 $16) 8... f6 $11 9. Bg3 Bb7 (9...
g4 10. Nfd2 Nc6 11. e4 $14) 10. e3 {Secures f4} Bb4+ 11. Nbd2 h5 12. h3 Nc6 13.
Qc2 Nce7 (13... h4 14. Bh2 $14) 14. Rc1 {[%cal Rc2c7,Rg3c7,Gd5c7,Gd8c7] The
backward pawn on c7 becomes a target} (14. e4 h4 15. Bh2 Bxd2+ 16. Qxd2 Nf4 17.
Bxf4 gxf4 18. Qxf4 Qd6 19. Bb5+ Kf7 20. Ng5+ Kg6 21. Qxd6 cxd6 22. Nxe6 Bxe4
$16) 14... Bd6 (14... Bc6 $5 $11 {must definitely be considered}) 15. Bxd6 $16
cxd6 16. Bb5+ (16. e4 Nf4 17. g3 Nfg6 $16) 16... Kf7 $14 17. a3 {Secures b4} (
17. Qb3 $5 $14 {is interesting}) 17... Rc8 $11 {Black threatens to win
material: Rc8xc2} 18. Qb1 Rxc1+ 19. Qxc1 f5 $4 {forfeits the advantage} (19...
a6 $142 {and Black can hope to live} 20. Bd3 Qd7 $11) 20. Nxg5+ $18 Kf6 21.
Ndf3 Ng6 22. e4 (22. O-O Qe7 $18) 22... fxe4 (22... Ndf4 23. exf5 Nxg2+ 24. Kd2
$14) 23. Nxe4+ Kf7 (23... Kg7 $5 24. O-O Qe7 $16) 24. Nfg5+ Kg8 25. O-O (25.
Qd2 Ndf4 26. g3 d5 27. gxf4 dxe4 $18) 25... Ndf4 $16 26. h4 (26. Qc2 d5 27.
Nxe6 Nxe6 $16) 26... Bxe4 $2 (26... a6 $142 $5 {is a viable option} 27. g3 axb5
28. gxf4 Bxe4 29. Nxe4 Qxh4 30. Qc8+ Nf8 $11) 27. Nxe4 $16 Qxh4 28. Qe3 $4 {
releasing the pressure on the opponent} (28. Re1 $5 d5 29. g3 Nh3+ 30. Kh2 Qe7
31. Kxh3 dxe4 $18) 28... Kg7 (28... Nxg2 29. Kxg2 Nf4+ 30. Kg1 Nh3+ 31. Kg2
Nf4+ 32. Kg1 Nh3+ 33. Kg2 Nf4+ $11) 29. Nxd6 {White has a new backward pawn:
d4.} (29. Rc1 Nd5 30. Qf3 $18) 29... Nxg2 $4 {Black lets it slip away} (29...
Qg5 $142 {saving the game} 30. g3 Rf8 $11) 30. Qxe6 $18 (30. Kxg2 $6 {is much
worse} Nf4+ 31. Kg1 Nh3+ 32. Kg2 Nf4+ 33. Kg1 Nh3+ 34. Kg2 Nf4+ $11) 30... N6f4
(30... Rf8 31. Nf5+ Rxf5 32. Qxf5 Qxd4 $18) 31. Nf5+ (31. Nf5+ Kh7 32. Qf7#)
1-0

[Event "Hokkaido Chess Championship 2020"]
[Site "?"]
[Date "2020.03.22"]
[Round "4.3"]
[White "Yoshii, Yukihiko"]
[Black "Yoshida, So"]
[Result "1-0"]
[ECO "E91"]
[WhiteElo "1824"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "65"]
[EventDate "2020.03.21"]
[EventRounds "5"]
[EventCountry "JPN"]

{E91: King's Indian: Classical: 6 Be2, unusual replies including 6...c5 and 6..
.Bg4} 1. c4 Nf6 2. d4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 Nbd7 7. O-O c6
8. h3 e5 9. Be3 Qc7 {Black has a cramped position. Black's piece can't move: c8
} (9... Qe7 10. Qc2 (10. d5 cxd5 11. Nxd5 Nxd5 12. Qxd5 Nf6 13. Qd3 Bd7 14. Nh2
Bc6 15. Bf3 Nd7 16. Rad1 Nc5 17. Qxd6 Qxd6 18. Rxd6 Nxe4 19. Rxc6 bxc6 20. Bxe4
Rfc8 21. g4 a5 22. b3 Bf8 23. g5 a4 24. Ng4 axb3 {Ivanov,M (2510)-Parfenov,V 
(2233) Moscow 1999 1-0 (44)}) 10... exd4 11. Bxd4 Nc5 12. Rfe1 Re8 13. Bf1 a5
14. Rad1 Qc7 15. e5 Bf5 16. Qc1 Nfe4 17. exd6 Qb6 18. d7 Red8 19. Nxe4 Bxd4 20.
Rxd4 Bxe4 21. Rdxe4 Nxe4 22. Rxe4 Rxd7 23. Ne5 Re7 24. c5 {Vokac,M (2475)
-Freisler,P (2350) Olomouc 1995 1-0}) 10. Rc1 $146 (10. Qc2 Re8 11. Rfd1 exd4
12. Nxd4 Nc5 13. Bf3 Qe7 14. Bg5 Qe5 15. Bxf6 Qxf6 16. Rac1 Bh6 17. Rb1 Bf4 18.
b4 Ne6 19. Nxe6 Bxe6 20. Ne2 Be5 21. Rd3 d5 22. cxd5 cxd5 23. Rbd1 Qh4 24. Re3
Qg5 {Szczesniak,K (2155)-Kwiecien,Z (2230) Wisla 1998 0-1 (68)}) (10. c5 d5 11.
exd5 Nxd5 12. Nxd5 cxd5 13. dxe5 Nxe5 14. Qxd5 Nxf3+ 15. Bxf3 Bxb2 $14) 10...
exd4 $11 {Black forks: c3+e3} 11. Nxd4 {Black has a cramped position. Black's
piece can't move: c8} Nc5 12. f3 {Covers g4} Nh5 13. b4 Ne6 14. Nxe6 {White
forks: c7+f8} Bxe6 15. f4 (15. Qe1 Rfe8 $11) 15... Ng3 {Black threatens to win
material: Ng3xf1} (15... Bxc3 16. Rxc3 Ng3 17. Re1 Nxe4 18. Rc2 $15) 16. Rf3
$11 {White threatens to win material: Rf3xg3} Bxc3 17. Rxg3 Bxb4 18. f5 {
White wins space} d5 (18... Bd7 $142 {and Black has air to breath} 19. Bd4 Bc5
$15) 19. Rg4 $16 Bd7 20. cxd5 Qe5 (20... Qd6 $5 21. Bf4 Qf6 $16) 21. Bd4 $18
Qd6 $2 (21... Qc7 22. dxc6 bxc6 23. Bc4 $18) 22. dxc6 (22. e5 $142 {seems even
better} Qb8 23. e6 c5 $18) 22... Bxc6 23. fxg6 hxg6 24. Bc4 Bc5 $2 (24... Rae8
25. Qd3 Bc5 26. Bxf7+ Rxf7 27. Rxc5 Re6 $18) 25. Bxc5 $18 Qxc5+ 26. Kh1 Kg7 (
26... Rad8 27. Bxf7+ $1 {Deflection: d8} Kxf7 28. Qb3+ (28. Rxc5 $4 {White is
too greedy} Rxd1+ 29. Kh2 Rd2 $19) 28... Bd5 29. Qf3+ (29. Rxc5 $6 {is much
weaker} Bxb3 30. Rc7+ Ke8 31. axb3 Rf7 $14) 29... Ke7 30. Rxc5 Rxf3 31. gxf3 (
31. Rxd5 $6 {is clearly worse} Ra3 $11) (31. exd5 $6 {is the less attractive
alternative} Ra3 $14) 31... Bxa2 32. Rxg6 $18) 27. Bxf7 $1 {Discovered attack:
c4, Rc1xc5.} Qe7 (27... Rxf7 28. Rxc5 {Discovered attack}) (27... Kxf7 28. Qf3+
{Decoy Double attack} (28. Rxc5 {Discovered attack})) 28. Bxg6 (28. Rxg6+ $142
{makes it even easier for White} Kxf7 29. Qh5 $18) 28... Kf6 (28... Rad8 29.
Qb3 Kh6 30. Qe3+ Kg7 $18) 29. Qd4+ Qe5 30. Rf1+ Ke6 31. Bf5+ Rxf5 32. exf5+ Kf6
33. Rg6+ (33. Rg6+ Ke7 34. Qxe5+ Kd7 35. Rd1+ Bd5 36. Rxd5+ Kc8 37. Rg8#) 1-0

[Event "Hokkaido Chess Championship 2020"]
[Site "?"]
[Date "2020.03.22"]
[Round "4.4"]
[White "Nakamura, Mitsuru"]
[Black "Ito, Katsuhide"]
[Result "1-0"]
[ECO "B33"]
[WhiteElo "1325"]
[BlackElo "1257"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "79"]
[EventDate "2020.03.21"]
[EventRounds "5"]
[EventCountry "JPN"]

{B33: Sicilian: Pelikan and Sveshnikov Variations} 1. e4 c5 2. Nf3 Nc6 3. d4
cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Nb3 Bb4 7. Bd2 (7. a3 Bxc3+ 8. bxc3 Nxe4 9. Qg4
Nf6 10. Qxg7 Rg8 11. Qh6 Rg6 12. Qh4 d5 13. Bb2 h5 14. f3 Bf5 15. O-O-O Qb6 16.
Bd3 Bxd3 17. Rxd3 O-O-O 18. c4 d4 19. Re1 Nd7 20. Qxh5 a5 21. f4 a4 {Chos,A 
(2268)-Abasov,N (2363) Evpatoria 2008 0-1 (51)}) 7... Bxc3 8. Bxc3 Nxe4 {
White has the pair of bishops} 9. Qg4 $146 {White threatens to win material:
Qg4xe4. White forks: e4+g7} (9. Qf3 Nxc3 10. Bc4 d5 11. Qxc3 dxc4 12. Qxc4 O-O
13. O-O Be6 14. Qe2 Qc7 15. Nc5 Nd4 16. Qh5 Qxc5 17. f4 g6 18. Qd1 Nxc2+ 19.
Kh1 Nxa1 20. Qxa1 exf4 21. Rxf4 Rac8 22. Rf1 Bd5 23. Qe1 Qd4 {Adorjan,A (2530)
-Tzermiadianos,A (2400) Chania 1995 0-1}) 9... Nf6 10. Qxg7 {White inhibits 0-0
} Rg8 {Black threatens to win material: Rg8xg7} 11. Qh6 Qe7 (11... Rg6 12. Qh4
$11) 12. O-O-O $11 {Black has a cramped position. Black's piece can't move: c8}
Rg6 {Black threatens to win material: Rg6xh6} 13. Qh3 (13. Qh4 $5 $11 {is
worthy of consideration}) 13... d5 $15 14. Qd3 Ne4 15. Qe2 (15. Be1 Bf5 16. Qb5
O-O-O $15) 15... Nxc3 16. bxc3 Qa3+ 17. Kb1 Be6 {Black has a king attack} (
17... a5 $5 18. Rxd5 Be6 19. Rxe5 a4 $17) 18. Qb5 $15 {White threatens to win
material: Qb5xb7} O-O-O 19. Nc5 {White has a mate threat} Na5 20. Qb4 Qxb4+ 21.
cxb4 Nc4 (21... Nc6 $5 22. Re1 e4 $15) 22. Bxc4 $11 dxc4 23. Rxd8+ Kxd8 24.
Rd1+ Ke7 25. g3 c3 (25... Rf6 $5 26. Rd2 Bf5 $11) 26. Nxb7 (26. Ne4 h5 $14)
26... Bg4 $11 {Black threatens to win material: Bg4xd1} 27. Rd3 {White
threatens to win material: Rd3xc3} Rb6 28. Nc5 (28. Na5 Rxb4+ 29. Ka1 Re4 30.
Nc6+ Kf6 31. Rxc3 Re1+ 32. Kb2 Rf1 $11) 28... Rxb4+ $15 29. Kc1 Rc4 30. Nb3 Bf5
{Black threatens to win material: Bf5xd3} 31. Re3 f6 32. f3 {Prevents
intrusion on e4+g4} Kf7 33. g4 Be6 34. h4 Bd5 35. Rd3 {White threatens to win
material: Rd3xd5} Ke6 36. Re3 Kd6 37. Rd3 Ke6 {Twofold repetition} 38. Re3 h6
39. Kb1 (39. Rd3 $5 $17) 39... Rc8 $4 {hands over the advantage to the opponent
} (39... Kd6 $142 $17 {Black missed this excellent chance}) 40. f4 1-0

[Event "Hokkaido Chess Championship 2020"]
[Site "?"]
[Date "2020.03.22"]
[Round "5.1"]
[White "Nakamura, Mitsuru"]
[Black "Kikuchi, Daijiro"]
[Result "0-1"]
[ECO "D30"]
[WhiteElo "1325"]
[BlackElo "1198"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "110"]
[EventDate "2020.03.21"]
[EventRounds "5"]
[EventCountry "JPN"]

{D30: Queen's Gambit Declined: Systems without Nc3} 1. d4 d5 2. c4 e6 3. Nf3 c5
4. e3 Nc6 5. Nbd2 (5. cxd5 exd5 6. Bb5 cxd4 7. Nxd4 Bd7 8. Nc3 Nf6 9. O-O Bd6
10. Nf3 Be6 11. b3 O-O 12. Bb2 Qe7 13. Ne2 a6 14. Bd3 Bg4 15. Ng3 Ne4 16. Be2
Rfd8 17. Nd4 Bxe2 18. Ndxe2 Be5 19. Nf5 Qc7 {Mastrovasilis,A (2541)
-Batsiashvili,N (2412) Kavala 2013 1/2-1/2 (66)}) 5... Nf6 6. b3 $146 (6. a3 a6
7. dxc5 Bxc5 8. b4 Ba7 9. Bb2 O-O 10. Bd3 dxc4 11. Nxc4 b5 12. Nd6 Nd5 13. Nxc8
Rxc8 14. O-O Qe7 15. Qb3 Bb8 16. Rac1 Nb6 17. Rc2 Na7 18. Bd4 Nd7 19. Rfc1 Rxc2
20. Qxc2 g6 {Dolezal,J (2255)-Lamser,J (2200) Czechia 2002 1-0 (58)}) 6... cxd4
7. exd4 Bb4 8. Be2 $2 (8. Bb2 O-O 9. Bd3 e5 10. dxe5 dxc4 11. Bxc4 Ng4 $14)
8... Bc3 {Black threatens to win material: Bc3xa1. Black forks: a1+d4} (8...
dxc4 9. Bxc4 Bc3 10. Rb1 $17) 9. Rb1 Nxd4 10. Nxd4 Bxd4 11. Bb2 Bxb2 12. Rxb2
O-O 13. O-O b6 14. Nf3 Ba6 15. Re1 dxc4 16. Qxd8 (16. Rd2 Qc7 17. bxc4 Rac8 $17
) 16... Rfxd8 17. bxc4 Rac8 18. Rb4 Ne4 19. Ra4 (19. Ne5 Nc5 $19) 19... Nc5 $19
20. Ra3 Rc7 (20... f6 21. g3 $19) 21. h3 (21. Ne5 Rd2 $19) 21... f6 22. Rc3 (
22. Nh2 Rd4 $19) 22... Bb7 23. Bd1 Rcd7 24. Bc2 h6 25. Bg6 e5 26. Bf5 Rd6 27.
a3 (27. Ra3 a5 $19) 27... Nd3 (27... e4 $142 $5 {keeps an even firmer grip} 28.
Nh4 $19) 28. Re3 Bxf3 (28... Nf4 29. Rc2 $19) 29. Bxd3 (29. Rexd3 Rxd3 30. Bxd3
Ba8 $17) 29... Bb7 30. Bg6 Kf8 (30... Rd1+ 31. Kh2 R8d2 32. f3 $19) 31. c5 $17
bxc5 32. Rxc5 Ke7 33. Bf5 Rc6 34. Rec3 Rdd6 35. a4 (35. f3 Rxc5 36. Rxc5 Rc6
$17) 35... Kd8 (35... Rd1+ 36. Kh2 Kd6 37. Rxc6+ Bxc6 38. Bd3 $19) 36. a5 (36.
Rxc6 Bxc6 (36... Rxc6 $6 37. Rd3+ Kc7 38. Rd7+ Kb8 39. Rxg7 $11) 37. Kf1 Bb7
$17) 36... Kc7 (36... Rxc5 $5 37. Rxc5 Rd1+ 38. Kh2 $19) 37. Be4 $17 Rxc5 (
37... Rd1+ $5 38. Kh2 Rxc5 39. Rxc5+ Kd6 40. Rc4 Bxe4 41. Rxe4 $17) 38. Rxc5+
Bc6 39. Bg6 $2 (39. f3 $142 $5 $17) 39... Rd5 $19 40. Rxd5 (40. Rc2 Rxa5 41.
Be4 Ra6 $19) 40... Bxd5 41. Be8 Kb7 (41... Kd6 $5 {and Black can already relax}
42. Bg6 $19) 42. Bb5 Kc7 43. g3 $4 {White has let it slip away} (43. Be8 Kd6
44. f3 $19) 43... Kd6 $19 44. f4 (44. Ba6 Kc5 45. Bc8 Kb5 $19) 44... exf4 45.
gxf4 Kc5 46. Be2 (46. Bd7 {doesn't change anything anymore} Kb4 $19) 46... Kb4
47. a6 Bc4 48. Bxc4 (48. Bf3 {no good, but what else?} Bxa6 49. Kf2 $19) 48...
Kxc4 49. Kg2 (49. Kf2 {doesn't change the outcome of the game} Kb5 50. Ke2 Kxa6
$19) 49... Kb5 50. Kg3 Kxa6 51. Kg4 g6 (51... Kb5 $142 {might be the shorter
path} 52. Kf5 a5 53. Kg6 $19) 52. h4 (52. f5 {is the last straw} gxf5+ 53. Kxf5
$19) 52... f5+ 53. Kg3 Kb5 (53... h5 {keeps an even firmer grip} 54. Kf2 Kb5
55. Ke3 $19) 54. Kf3 Kc4 55. Ke3 a5 0-1

[Event "Hokkaido Chess Championship 2020"]
[Site "?"]
[Date "2020.03.22"]
[Round "5.2"]
[White "Sugimoto, Koichi"]
[Black "Yoshii, Yukihiko"]
[Result "0-1"]
[ECO "E91"]
[WhiteElo "2021"]
[BlackElo "1824"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "104"]
[EventDate "2020.03.21"]
[EventRounds "5"]
[EventCountry "JPN"]

{E91: King's Indian: Classical: 6 Be2, unusual replies including 6...c5 and 6..
.Bg4} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 Bg4 6. Be2 O-O 7. O-O Nc6
8. Be3 a6 $146 {Controls b5} (8... a5 9. h3 Bxf3 10. Bxf3 Nd7 11. Ne2 e5 12. d5
Ne7 13. a3 f5 14. b4 axb4 15. axb4 Rxa1 16. Qxa1 Nf6 17. Nc3 fxe4 18. Nxe4 Nxe4
19. Bxe4 Nf5 20. Bd2 Qh4 21. Qb1 Nd4 22. Qd3 Bh6 23. Bc3 {Alexandria,N (2360)
-Petrovic,M (2290) Jajce 1990 0-1 (68)}) (8... Bxf3 9. Bxf3 e5 10. d5 Ne7 (
10... Na5 11. Qe2 c5 12. dxc6 bxc6 13. b4 Nb7 14. Rfd1 Qb8 15. Rab1 Re8 16. a4
h6 17. Qd2 Kh7 18. a5 Bf8 19. b5 c5 20. Nd5 Nxd5 21. Qxd5 Nd8 22. Bg4 Ne6 23.
Bxe6 fxe6 24. Qc6 Qc8 25. a6 {Hassenrueck,H (2206)-Pape,M (2249) Halle 2011
1-0 (66)}) 11. c5 Ne8 12. Be2 f5 13. f3 dxc5 (13... Nf6 14. Rc1 Kh8 15. Qd3 a6
16. Rc2 Nh5 17. cxd6 cxd6 18. g3 f4 19. Bf2 fxg3 20. hxg3 Ng8 21. Kh2 Qg5 22.
Qd2 Qf6 23. Be3 Rf7 24. Bg5 {1-0 (24) Rios Parra,A (2344)-Lotero,F (2177)
Ibague 2013}) 14. Bxc5 Nd6 15. Be3 (15. Qc2 a6 16. Be3 b5 17. a4 Qd7 18. axb5
axb5 19. Rxa8 Rxa8 20. Qb3 Rb8 21. Na4 Kh8 22. Nc5 Qc8 23. Rc1 Qe8 24. Ne6 fxe4
25. Rxc7 exf3 26. Bxf3 Rc8 27. Rxc8 Nexc8 28. Qc3 Qf7 29. Nxg7 Qxg7 {Thinius,M
(2305)-Kauschmann,H (2180) Germany 1994 1/2-1/2 (48)}) 15... h6 16. Rc1 Rf7 17.
Qc2 c6 18. Rfd1 cxd5 19. exd5 a6 20. Na4 f4 21. Bf2 Nef5 22. Nc5 Qb6 23. Ne6 {
Huang,Q (2416)-Salcedo,R (2324) Manila 2007 1-0 (34)}) 9. d5 {White gets more
space} Bxf3 10. Bxf3 ({Instead of} 10. dxc6 Bxe2 11. Qxe2 bxc6 $15) 10... Ne5
11. Be2 e6 (11... c6 12. f4 Ned7 13. Qc2 $16) 12. f3 (12. f4 Ned7 $16) 12...
Ned7 (12... Qe7 13. f4 Ned7 14. Bd3 $14) 13. Qd2 (13. dxe6 fxe6 14. f4 Qe7 $16)
13... Re8 14. Rac1 b6 15. Rfd1 e5 (15... a5 16. Nb5 $16) 16. b4 Qe7 17. a3 Rec8
18. Bf1 Rf8 19. Bg5 Qe8 20. g3 h5 21. Bh3 Nh7 22. Bh6 (22. Be3 Nhf6 $16) 22...
Ndf6 (22... Bxh6 23. Qxh6 Nhf6 24. Rc2 $14) 23. Rf1 (23. Be3 Nd7 $16) 23... Qe7
(23... Bxh6 24. Qxh6 Nd7 25. Rc2 $16) 24. Nd1 (24. Be3 h4 $16) 24... a5 (24...
Bxh6 25. Qxh6 a5 26. Nc3 $14) 25. Be3 $16 {[%cal Yc4c5] White prepares the
advance c5} axb4 26. axb4 Ra3 27. Nf2 Rfa8 28. Nd3 {[%cal Yc4c5] White
prepares c5} Qe8 (28... h4 29. c5 $16 (29. gxh4 $143 Nh5 $14)) 29. c5 Qb5 30.
Rfd1 Ra2 31. Rc2 Rxc2 32. Qxc2 Ra3 (32... bxc5 33. bxc5 Qa4 34. Rc1 $16) 33.
cxd6 $18 cxd6 34. Qc6 Qa4 35. Qxa4 Rxa4 36. Bxb6 Ng5 (36... g5 37. Bf5 $18) 37.
Bg2 Nd7 38. Bd8 (38. Bc7 {and White can already relax} Bf8 $18) 38... Nh7 39.
Bh3 Nhf6 40. b5 Ra8 41. Bc7 Bh6 (41... Bf8 42. Rb1 Ra3 43. Bf1 $18) 42. Bxd6
Be3+ 43. Kf1 Bd4 44. Ke2 Ne8 (44... Ra5 45. Bb4 Rxb5 46. Rc1 $18) 45. Bb4 (45.
Bxd7 $6 Nxd6 46. h3 Kf8 $18) 45... Nb6 46. Bc5 (46. f4 {seems even better} Nc7
47. Nxe5 Nxb5 $18) 46... Nc4 $2 (46... Na4 $142 47. Bxd4 exd4 $18) 47. Bxd4
exd4 48. Bd7 (48. Rc1 $5 {makes it even easier for White} Ra4 49. e5 f5 $18)
48... Ra2+ 49. Ke1 Ned6 (49... Nf6 $142 50. Bc6 Rxh2 $18) 50. Nf2 $4 {ruins a
clearly superior position} (50. e5 $142 {makes sure everything is clear} Nb7
51. e6 fxe6 52. dxe6 $18 (52. Bxe6+ $6 Kg7 $18)) 50... Ne3 {Black threatens to
win material: Ne3xd1. The knight dominates} (50... Ne5 51. f4 Nxd7 52. Rxd4
Nxb5 $15) 51. Rb1 (51. Rd2 $142 {had to be tried to avoid defeat} Ra1+ 52. Ke2
$11) 51... Ndc4 $19 52. Bh3 (52. Nd3 Rxh2 53. Rc1 Ng2+ 54. Kf1 Nd2+ 55. Ke2
Nf4+ 56. Kd1 Nxd3 57. Rc2 Nxf3 58. Rxh2 Nxh2 59. b6 $17) 52... Ne5 (52... Ne5
53. Bg4 hxg4 54. Rb2 Rxb2 55. Nxg4 Nxf3#) 0-1

[Event "Hokkaido Chess Championship 2020"]
[Site "?"]
[Date "2020.03.22"]
[Round "5.3"]
[White "Ito, Katsuhide"]
[Black "Takeuchi, Hiroshi"]
[Result "1/2-1/2"]
[ECO "B08"]
[WhiteElo "1257"]
[BlackElo "1343"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "97"]
[EventDate "2020.03.21"]
[EventRounds "5"]
[EventCountry "JPN"]

{B08: Pirc Defence: Classical System} 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7
5. Bc4 O-O 6. h3 {Black has a cramped position} Nbd7 $4 $146 {throwing away
the advantage} (6... Nfd7 7. O-O Nc6 8. Re1 h6 9. Be3 e5 10. dxe5 Ncxe5 11. Bb3
Kh7 12. Nxe5 Nxe5 13. Nd5 c6 14. Nf4 Qc7 15. Bd4 b6 16. Qe2 Nf3+ 17. Qxf3 Bxd4
18. c3 Be5 19. Rad1 Bb7 20. Nd3 Bg7 21. h4 {Rabiega,R (2325)-Padevsky,N (2425)
Berlin 1991 1-0 (44)}) (6... c5 7. d5 b5 8. Nxb5 Nxe4 9. O-O a6 10. Na3 Nf6 11.
Re1 Nbd7 12. Bb3 Nb6 13. c4 e6 14. dxe6 Bxe6 15. Ng5 Qd7 16. Be3 Bf5 17. Bc2
Rfd8 18. Qe2 Bxc2 19. Qxc2 Qc6 20. Rad1 Rac8 21. b3 {Virolainen,V (2155)
-Karlsson,L (2434) Sweden 2014 0-1 (49)}) (6... Nc6 7. Bg5 h6 8. Bh4 a6 9. a4
Bd7 10. O-O Rc8 11. Re1 g5 12. Bg3 e6 13. e5 Nh5 14. Bh2 d5 15. Bf1 f5 16. exf6
Qxf6 17. Ne2 Be8 18. Ra3 Bg6 19. Qd2 Be4 20. Re3 Qg6 21. Nc3 {De Oliveira,R 
(2221)-Azevedo,K (2203) Rio de Janeiro 1996 1/2-1/2 (35)}) (6... e6 7. O-O b6
8. e5 dxe5 9. dxe5 Qxd1 10. Rxd1 Nfd7 11. Bf4 Bb7 12. Re1 Bxf3 13. gxf3 Nc6 14.
Bb5 Ncxe5 15. Bxd7 Nxd7 16. Rad1 Bxc3 17. bxc3 Nf6 18. Bxc7 Nd5 19. Be5 Rfc8
20. Rd3 Rc4 21. Re4 {Illijin,N (2271)-Kazakov,M (2457) Ptuj 2003 0-1 (39)}) (
6... Nxe4 $142 $5 {should be considered} 7. Nxe4 d5 $11) 7. O-O (7. e5 $5 dxe5
8. dxe5 $18) 7... e5 8. Ng5 (8. Bg5 $5 $16) 8... exd4 $11 9. Bxf7+ (9. Qxd4
$142 {and White hangs on} Ne5 10. Be2 $11) 9... Rxf7 $17 10. Nxf7 Kxf7 11. Qxd4
Nb6 12. Bg5 Qe8 13. Rfe1 (13. Rae1 Be6 $17) 13... Nfd7 (13... Nfd5 14. exd5
Qxe1+ 15. Rxe1 Bxd4 16. Nb5 $17) 14. Qd3 (14. Qe3 Qe5 $17) 14... Ne5 15. Qe2 h6
16. Bf4 Be6 17. Bxe5 Bxe5 18. Qf3+ (18. f4 Bd4+ 19. Kh1 $17) 18... Kg7 $19 19.
Rad1 (19. Nd5 Bxd5 (19... Bxb2 $6 {is clearly weaker} 20. Nxc7 Qg8 21. Nxa8
Qxa8 22. Rab1 $11) 20. exd5 Qb5 $19) 19... Qd7 (19... Qc6 {makes it even
easier for Black} 20. Nd5 Bxb2 21. c3 $19) 20. Nd5 (20. b3 Qc6 21. Ne2 Rf8 $17)
20... Rf8 21. Qe3 Qf7 (21... Qc6 {seems even better} 22. Nxb6 axb6 23. b3 $19)
22. f4 (22. b3 Bxd5 23. exd5 Nxd5 24. Qxa7 b6 $19) 22... Bxf4 (22... Bxb2 $142
$5 23. Qb3 Bf6 $19) 23. Nxf4 $17 Qxf4 24. Qc3+ Qe5 (24... Qf6 $142 $5 25. Qxc7+
Rf7 26. Qxd6 Nc4 $17) 25. Qxc7+ $11 {White forks: d6+b7} Bf7 26. Qxd6 Qxb2 {
Black forks: a2+c2} 27. Rf1 (27. e5 Nc4 28. Qc7 Qb6+ (28... Qxc2 $143 29. e6
Qc3 30. Re2 $18 (30. exf7 $6 Rxf7 31. Qc8 b5 $16)) (28... Qxa2 $143 29. e6 $16)
29. Qxb6 Nxb6 $11) 27... Qxa2 {Black has a new passed pawn: a7} (27... Nc4 $142
28. Qd3 Qb6+ 29. Kh1 Ne5 $15) 28. Qf6+ $14 Kg8 29. Rd8 Rxd8 30. Qxd8+ Kg7 31.
Qf6+ Kg8 32. Ra1 {White threatens to win material: Ra1xa2} (32. Rd1 $142 $5 {
should be investigated more closely} Be8 33. Rd8 $11) 32... Qxc2 $15 33. Rf1 $2
(33. Rxa7 Qc7 $15) 33... Qc4 $4 {not a good decision, because now the opponent
is right back in the game} (33... Qc7 34. e5 Nd5 35. Qd6 $19) 34. e5 $4 {
gives the opponent new chances} (34. Qd8+ $142 {would allow White to play on}
Kh7 35. Qe7 $11) 34... Qd5 $19 35. Re1 (35. Qf2 h5 $19) 35... Qd4+ (35... Nd7
36. Qe7 Qc5+ 37. Qxc5 Nxc5 38. Ra1 $19) 36. Kh1 Nc4 (36... Nd5 37. Qd6 Qf2 $17)
37. Rf1 $2 (37. Qe7 $142 Qf2 38. Ra1 $17) 37... Nxe5 $19 38. Rb1 Qd5 (38... a5
{and Black can already relax} 39. Qe7 $19) 39. Qe7 b5 (39... a5 $142 $5 {
might be the shorter path} 40. Rxb7 Kg7 $19) 40. Qxa7 $17 Qe4 41. Rf1 $4 {
solves nothing} (41. Rxb5 $142 $5 Nc6 42. Qd7 $17) 41... Qe2 (41... b4 $5 {
might be the shorter path} 42. Qb8+ Kg7 43. Qb6 $19) 42. Rg1 (42. Kg1 $19)
42... b4 $4 {Black is ruining his position} (42... Nd3 $142 $19 {secures
victory}) 43. Qb8+ $17 Kg7 44. Qxb4 Nd3 45. Qd4+ Kg8 (45... Kh7 46. Rb1 $17)
46. Qf6 Nf2+ 47. Kh2 Ne4 {Black threatens to win material: Ne4xf6} 48. Qd8+ (
48. Qe5 Qc2 $15) 48... Kg7 $17 49. Qd4+ 1/2-1/2

[Event "Hokkaido Chess Championship 2020"]
[Site "?"]
[Date "2020.03.22"]
[Round "5.4"]
[White "Sato, Yasuji"]
[Black "Yoshida, So"]
[Result "0-1"]
[ECO "B07"]
[WhiteElo "1512"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "60"]
[EventDate "2020.03.21"]
[EventRounds "5"]
[EventCountry "JPN"]

{B07: Pirc Defence: Miscellaneous Systems} 1. e4 d6 2. Nf3 Nf6 {Black
threatens to win material: Nf6xe4} 3. Bc4 $146 (3. c3 g6 4. Be2 (4. Bd3 Bg7 5.
O-O O-O 6. Re1 Bg4 7. h3 Bxf3 8. Qxf3 c5 9. Bf1 Nc6 10. Na3 Qa5 11. Nc4 Qc7 12.
a4 a6 13. d3 b5 14. Ne3 b4 15. Bd2 Rab8 16. Nc4 Nd7 17. Qd1 Rb7 18. Qc1 bxc3 {
Laird,C (2315)-Azmaiparashvili,Z (2610) Sydney 1990 0-1 (46)}) 4... Bg7 5. O-O
O-O 6. d3 c5 7. h3 Qc7 8. Be3 e5 9. c4 Nc6 10. Qc1 Be6 11. Nc3 a6 12. Nh4 Rae8
13. f4 exf4 14. Bxf4 Nd4 15. Bd1 Nd7 16. Nf3 Ne5 17. Qd2 Nexf3+ {Garcia Ramon,
R (2315)-Gonzalez,J (2270) Las Palmas 1989 1-0 (34)}) (3. Nc3 Bg4 (3... c6 4.
a4 Bg4 5. h3 Bh5 6. Be2 e6 7. d4 d5 8. exd5 cxd5 9. g4 Bg6 10. Ne5 Nfd7 11. h4
Nxe5 12. h5 Bxc2 13. Qxc2 Nec6 14. Be3 Nb4 15. Qd2 N8c6 16. O-O-O Qd7 17. g5
O-O-O 18. Kb1 {Kovacevic,P (2400)-Andonov,B (2360) Belgrade 1990 0-1}) 4. h3
Bh5 5. d3 (5. Qe2 c6 6. g4 Bg6 7. h4 h5 8. g5 Nfd7 9. d3 e6 10. Bh3 Be7 11. Nd4
e5 12. Nf5 Bxf5 13. Bxf5 g6 14. Bh3 Qb6 15. O-O Nc5 16. Kh1 Ne6 17. f4 exf4 18.
Bxf4 Nxf4 19. Rxf4 Qxb2 {Comas Fabrego,L (2520)-Benjamin,J (2595) New York
1998 1-0}) 5... e6 6. g4 Bg6 7. Bg2 Nc6 8. O-O Be7 9. Nh2 h5 10. g5 Nd7 11. f4
h4 12. Be3 Bh5 13. Qe1 e5 14. Qxh4 Nd4 15. Bxd4 exd4 16. Ne2 c5 17. Ng3 g6 {
Zvjaginsev,V (2650)-Minasian,A (2620) Elista 1998 1-0 (38)}) (3. Nc3 $5 $14)
3... Nxe4 $11 4. O-O g6 (4... Nf6 5. Nc3 $11) 5. Re1 (5. Nc3 $5 Nf6 6. d4 $11)
5... Nf6 $11 6. Ng5 {White threatens to win material: Ng5xf7} (6. Nc3 Bg7 $11)
6... d5 {Black threatens to win material: d5xc4} 7. Bb3 (7. Bb5+ Nc6 $15) 7...
Bg7 $15 8. Qf3 (8. Nc3 O-O $17) 8... O-O 9. d4 $2 (9. Nc3 h6 10. Nh3 Bg4 $17)
9... c6 {Black has a cramped position} (9... h6 $142 10. Nh3 Nc6 $19) 10. h3 $4
{further deteriorates the position} (10. Qe2 $142 Re8 11. Nc3 $15) 10... h6 $19
11. Qe3 (11. Nc3 {a fruitless try to alter the course of the game} hxg5 12.
Bxg5 Na6 $19) 11... hxg5 12. Qxg5 Ne4 13. Qh4 (13. Rxe4 {is no salvation} dxe4
14. Qxg6 Qxd4 $19) 13... Bxd4 14. Re2 (14. Rxe4 {is not much help} dxe4 15. Nc3
Bxc3 16. bxc3 Qd1+ 17. Kh2 Qd6+ 18. Bf4 Qf6 $19) 14... e5 (14... Bf6 {and
Black can already relax} 15. Qh6 Na6 16. Rxe4 $19) 15. Qh6 (15. Rxe4 dxe4 16.
Bg5 $19) 15... Qf6 16. Be3 (16. Kh2 {a last effort to resist the inevitable}
Bxf2 17. Rxe4 dxe4 18. Nc3 $19) 16... Bxb2 17. f3 (17. Nd2 {cannot change
destiny} Nxd2 18. Bg5 Qg7 $19 (18... Bxa1 $4 {fails to mate in 3} 19. Bxf6 Nf3+
20. Kh1 Bxh3 21. Qg7#)) 17... Ng3 18. Bc5 Nxe2+ 19. Kf2 Bd4+ 20. Bxd4 Nxd4 (
20... exd4 {keeps an even firmer grip} 21. Kxe2 d3+ 22. cxd3 Re8+ 23. Kf1 Bxh3
24. Kf2 Qxa1 25. Qd2 Qxb1 26. gxh3 $19) 21. Nc3 Nxb3 (21... e4 $142 {might be
the shorter path} 22. Qd2 exf3 23. g3 $19) 22. cxb3 e4 23. Rc1 exf3 24. g4 Nd7
(24... Re8 $142 {and Black can already relax} 25. Kg3 f2 26. Rf1 Qxc3+ 27. Kh2
$19) 25. Nd1 Ne5 (25... Re8 $142 {seems even better} 26. Kg3 Re2 27. Nf2 $19)
26. Rc3 Bxg4 (26... d4 27. Re3 dxe3+ 28. Nxe3 Nd3+ 29. Kg3 Re8 30. a4 Qb2 31.
Qh8+ Qxh8 32. Ng2 Qe5+ 33. Nf4 Qxf4+ 34. Kh4 Kg7 35. b4 Rh8#) 27. Kg3 Bh5 (
27... d4 $142 {keeps an even firmer grip} 28. Rc2 Qf5 29. Qd2 Bxh3 30. Nf2 $19)
28. Nf2 Ng4 (28... Qd6 29. Rc4 Nd3+ 30. Rf4 Nxf2 31. Kxf2 Qc5+ 32. Rd4 Qxd4+
33. Qe3 Qh4+ 34. Kg1 Qg3+ 35. Kf1 Rae8 36. Qf2 Qxh3+ 37. Kg1 Re1+ 38. Qxe1 Qg2#
) 29. hxg4 Qxc3 30. gxh5 Qe5+ (30... Qe5+ 31. Kxf3 Rae8 $19) 0-1

