[Event "SapporoAutumn2023"]
[Site "?"]
[Date "2023.10.08"]
[Round "1.1"]
[White "Yamada, Akihiro"]
[Black "Takeuchi, Hiroshi"]
[Result "1-0"]
[ECO "B07"]
[WhiteElo "1966"]
[BlackElo "1410"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "45"]
[SourceVersionDate "2023.10.23"]

{[%mdl 8192] B07: Pirc Defence: Miscellaneous Systems} 1. e4 d6 2. d4 Nf6 3.
Nc3 g6 4. Bg5 Bg7 5. e5 dxe5 6. dxe5 Qxd1+ 7. Rxd1 Ng4 8. h3 (8. Nd5 Bxe5 9.
Nf3 Bd6 10. Bxe7 Bxe7 11. Nxc7+ Kf8 12. Nxa8 Bc5 13. Rd8+ Kg7 14. Rxh8 Kxh8 15.
Bc4 b5 16. Bxb5 Bb7 17. Nc7 Bxf2+ 18. Ke2 Bb6 19. Ne8 Ne3 20. Nd6 Bd5 21. c4
Be6 22. Rc1 Nxg2 {Vrana,F (2369)-Hrivnak,D (2258) Czechia 2006 1-0 (35)}) 8...
Nxe5 $146 (8... Nxf2 9. Kxf2 Bxe5 10. Nd5 c6 11. Nf3 cxd5 12. Nxe5 f6 13. Bb5+
Nd7 14. Nxd7 Bxd7 15. Bxd7+ Kxd7 16. Be3 Kc6 17. Rd3 b6 18. Rc3+ Kd6 19. Rd1
Rac8 20. Rxc8 Rxc8 21. c3 e5 22. a4 Rc4 23. a5 {Vatter,H (2325)-Preiss,M (2290)
Triberg 1991 1-0 (40)}) (8... Bxe5 9. hxg4 Bxg4 10. Be2 Be6 11. Nf3 Bxc3+ 12.
bxc3 Nc6 13. Nd4 Nxd4 14. cxd4 Bxa2 15. c4 a5 16. Rh3 {1-0 (16) Caldeira,A 
(2247)-Carvalho,H (2176) Sao Paulo 2014}) (8... h6 9. Nd5 Bxe5 10. hxg4 Bxg4
11. Be2 Bxe2 12. Nxe2 Na6 13. Rxh6 Rxh6 14. Bxh6 c6 15. Ndc3 Nb4 16. Rd2 Bf6
17. a3 Na6 18. Be3 Nc7 19. Bd4 Bg5 20. f4 Bh6 21. Be3 Ne6 22. Kf2 Bg7 23. Kf3 {
Sargac,R (2243)-Djingarova,E (2358) Zadar 2005 1-0 (45)}) (8... Bxe5 9. hxg4
Bxg4 10. Nf3 Bxf3 11. gxf3 $18) 9. Nd5 f6 (9... Kd7 10. g3 h6 11. Be3 $18) 10.
Nxc7+ Kf7 11. Be3 (11. Nxa8 $6 {is much weaker} fxg5 12. Nc7 Bf5 $16) 11... Na6
12. Nxa8 Bf5 (12... Nb4 {hardly improves anything} 13. c3 Nc2+ 14. Ke2 $18) 13.
f4 Rxa8 (13... Nb4 {doesn't change the outcome of the game} 14. fxe5 Nxc2+ 15.
Kf2 Rxa8 16. Bc4+ Ke8 17. exf6 Nxe3 18. Kxe3 (18. fxg7 $143 Nxd1+ 19. Kg3 Kd7
$18) 18... Bxf6 19. b3 $18) 14. fxe5 fxe5 (14... Nb4 {does not win a prize} 15.
Bc4+ Be6 16. Bxe6+ Kxe6 17. c3 Nc2+ 18. Ke2 Nxe3 19. Kxe3 Bh6+ 20. Ke4 f5+ 21.
Kf3 $18) 15. Bc4+ Ke8 (15... Be6 {is no salvation} 16. Bxe6+ Kxe6 17. Nf3 $18)
16. Nf3 h6 (16... Nb4 {doesn't improve anything} 17. c3 Nc2+ 18. Kf2 Nxe3 19.
Kxe3 $18) 17. O-O Nb4 18. c3 Nc6 (18... Rc8 {doesn't get the cat off the tree}
19. Nd2 Rxc4 20. Nxc4 $18) 19. Nh4 e6 (19... Na5 {does not save the day} 20.
Bb5+ Nc6 21. Nxf5 gxf5 22. Rxf5 $18) 20. g4 g5 (20... Rd8 {doesn't do any good}
21. gxf5 gxf5 22. Rxd8+ Kxd8 23. Bxe6 $18) 21. gxf5 gxh4 22. f6 Bf8 23. f7+ (
23. f7+ Ke7 24. Bc5#) 1-0

[Event "SapporoAutumn2023"]
[Site "?"]
[Date "2023.10.08"]
[Round "1.2"]
[White "Nakamura, Mitsuru"]
[Black "Yoshii, Yukihiko"]
[Result "0-1"]
[ECO "C41"]
[WhiteElo "1388"]
[BlackElo "1685"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "82"]
[SourceVersionDate "2023.10.23"]

{[%mdl 8192] C41: Philidor Defence} 1. e4 e5 2. Nf3 d6 3. d4 Bg4 4. Be2 $146 (
4. dxe5 Qe7 (4... Bxf3 5. Qxf3 dxe5 6. Qb3 b6 7. Bc4 Qf6 8. Nc3 Bc5 9. O-O Ne7
10. Nb5 Bd6 11. Bd5 Nxd5 12. Qxd5 c6 13. Nxd6+ Kd7 14. Qxf7+ {1-0 (14)
Lajthajm,B (2511)-Colovic,D (2356) Senta 2007}) (4... Nc6 5. exd6 Bxd6 6. Bb5 (
6. h3 Bh5 7. Bb5 Qe7 8. Qe2 Nf6 9. g4 Nxg4 10. hxg4 Bxg4 11. Be3 O-O 12. Bxc6
bxc6 13. Nbd2 Rab8 14. Bd4 Bf4 15. O-O-O Rfd8 16. Rhg1 Rxd4 17. Rxg4 Rxe4 18.
Rdg1 Rxe2 19. Rxg7+ Kh8 {0-1 (19) Cooper,J (2345)-Hodgson,J (2285) Chester 1979
}) (6. Be2 Qe7 7. Nfd2 h5 8. h3 Bxe2 9. Qxe2 Nf6 10. Nc3 O-O-O 11. O-O Nd4 12.
Qd1 Qe5 13. f4 Qc5 14. Kh1 Ng4 15. Nf3 Ne6 16. f5 Bg3 17. Qe2 Nd4 18. Be3 Be5
19. Qe1 b6 20. Bxd4 Bxd4 {Gazik,I (2455)-Horvath,I (2360) Zalaegerszeg 1991 1/
2-1/2}) 6... Qe7 7. Bxc6+ bxc6 8. O-O Rd8 9. Qe2 Nf6 10. Re1 Nd7 11. h3 Bxf3
12. Qxf3 O-O 13. Bf4 Ne5 14. Qg3 Rb8 15. b3 f6 16. Nd2 Rfd8 17. Rad1 Bb4 18.
Rf1 Bxd2 19. Rxd2 {Oliva Castaneda,K (2488)-Guezennec,F (2228) Barcelona 2015
1-0 (47)}) 5. Qd5 c6 6. Qxd6 Qxd6 7. exd6 Bxd6 8. Nbd2 Nd7 9. Nc4 Bc7 10. Ne3
Ngf6 11. Nxg4 Nxg4 12. Bc4 O-O 13. Ng5 Rae8 14. f3 Ngf6 15. O-O h6 16. Nh3 g5
17. Be3 Nxe4 18. fxe4 Rxe4 {Pillsbury,H-Blackburne,J England 1900 1/2-1/2 (67)}
) 4... Nd7 5. h3 Bxf3 {Black forks: g2+e4} 6. Bxf3 Ngf6 7. Be3 Be7 8. c3 O-O 9.
Nd2 a6 10. O-O c6 11. d5 cxd5 12. exd5 Rc8 13. c4 (13. a4 Ne8 $14) 13... h6 {
Prevents intrusion on g5} (13... Ne8 14. Qb3 f5 15. Nb1 $11) 14. b3 (14. Qb1
Re8 $14) 14... Re8 (14... Nh7 15. b4 $11) 15. Re1 Nc5 16. Bxc5 (16. Qc2 $5 $14)
16... Rxc5 $11 {Opposite coloured bishops appeared} 17. b4 {White threatens to
win material: b4xc5} Rc7 18. Qb3 Qd7 19. a4 Rec8 20. a5 {This push gains space}
g6 {Black has a cramped position} 21. Rac1 Kg7 22. Ra1 h5 23. Re3 (23. Rad1 Bf8
$11) 23... Nh7 {White has an active position} 24. Rc3 f5 25. Be2 e4 {Black
gains space} 26. g4 $2 (26. Rd1 $142 $5 $11 {is the best option White has})
26... Bf6 27. gxh5 g5 (27... Qe7 28. Rd1 Bxc3 29. Qxc3+ Kh6 30. Qg3 $17) 28.
Ra3 Bxc3 29. Qxc3+ Nf6 30. Qg3 $2 (30. f3 $142 $5 $15 {is a viable option})
30... Kh6 $17 31. f4 (31. h4 Rg8 32. Kf1 Qe7 $17 (32... Nxh5 $6 33. hxg5+ Rxg5
34. Qh2 $11)) 31... Rg8 $19 32. Kh1 (32. Kf2 $142 Qe7 33. fxg5+ Rxg5 34. Qf4
$19) 32... Nxh5 33. Bxh5 Kxh5 34. Qf2 Qg7 (34... Qd8 $5 {makes it even easier
for Black} 35. Nf1 Rcg7 36. Rg3 $19) 35. Rg3 Qa1+ (35... Qf6 36. Qe2+ g4 37.
Kg1 $19) 36. Kg2 (36. Kh2 Qb2 $19) 36... Rcg7 37. Qe2+ Kh6 38. Kh2 $4 {White
falls apart} (38. Qe3 g4 39. Kf2 $19) 38... gxf4 39. Rxg7 Rxg7 40. Nf1 Qd4 41.
b5 (41. Ng3 {doesn't change anything anymore} fxg3+ 42. Kh1 f4 43. Qf1 f3 44.
Qc1+ Kh5 45. Qg1 g2+ 46. Qxg2 Rxg2 47. c5 Qd1#) 41... Qg1# 0-1

[Event "SapporoAutumn2023"]
[Site "?"]
[Date "2023.10.08"]
[Round "1.3"]
[White "Nishimori, Toshiyuki"]
[Black "Ishii, Hibiki"]
[Result "0-1"]
[ECO "B13"]
[WhiteElo "1604"]
[BlackElo "1365"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "72"]
[SourceVersionDate "2023.10.23"]

{[%mdl 8192] B13: Caro-Kann: Exchange Variation and Panov-Botvinnik Attack} 1.
e4 c6 2. d4 d5 3. exd5 cxd5 4. Nc3 Nf6 5. Nf3 Bg4 {White has a very active
position} 6. Bb5+ $146 (6. h3 Bxf3 7. Qxf3 Nc6 (7... e6 8. Bd3 Nc6 9. Ne2 Be7
10. O-O O-O 11. c3 a6 12. Bf4 b5 13. b4 Qd7 14. Qe3 Rfc8 15. Nc1 a5 16. Bxb5
axb4 17. cxb4 Bxb4 18. Nd3 Bd6 19. Ne5 Bxe5 20. Bxe5 Qe7 21. Qg5 h6 22. Qh4 {
Brih,S (2220)-Bernard,V (2248) France 2003 0-1 (60)}) 8. Bb5 e6 9. O-O a6 10.
Bxc6+ bxc6 11. Bg5 Be7 12. Na4 O-O 13. c3 h6 14. Bxf6 Bxf6 15. Qg3 Be7 16. b4
Bd6 17. f4 a5 18. Nc5 axb4 19. cxb4 Bxc5 20. dxc5 Qf6 {Hrabe,P (2310)
-Knazovcik,L (2260) Czechia 2000 1/2-1/2 (49)}) (6. Be2 Nc6 7. O-O e6 8. Bf4
Be7 9. Ne5 Bxe2 10. Nxe2 O-O 11. c3 Nxe5 12. Bxe5 b5 13. Bxf6 Bxf6 14. Nf4 b4
15. Qg4 bxc3 16. bxc3 Rc8 17. Rac1 Bg5 18. Rc2 Bxf4 19. Qxf4 Qb6 20. Rfc1 Rc4 {
Haznedaroglu,K (2287)-Rausis,I (2486) Haarlem 2000 0-1 (43)}) (6. Bg5 a6 7. Be2
Bxf3 8. Bxf3 e6 9. O-O Be7 10. Ne2 Nc6 11. c4 O-O 12. Bxf6 Bxf6 13. cxd5 exd5
14. Qb3 Nxd4 15. Nxd4 Bxd4 16. Rad1 Qf6 17. Qxd5 Rfd8 18. Qb3 g6 19. Rd2 Rd7
20. Rfd1 Rad8 {De Vos,N (2221)-Kabos,T (2294) Brasschaat 2013 1/2-1/2 (46)})
6... Nc6 7. Bxc6+ bxc6 {Black has the pair of bishops} 8. h3 {White threatens
to win material: h3xg4} Bh5 9. g4 Bg6 {Black has a cramped position. Black's
piece can't move: f8} 10. Ne5 {White threatens to win material: Ne5xc6} Qc8 (
10... Nd7 11. Nxg6 hxg6 12. Bf4 $11) 11. Nxg6 (11. h4 $142 $5 h6 12. Bf4 $16)
11... hxg6 $11 {Black has new doubled pawns: g6+g7} ({Not} 11... fxg6 12. O-O
$14) 12. Bf4 $2 (12. Qf3 $5 $11 {must be considered}) 12... Nxg4 (12... Qxg4
13. Qxg4 Nxg4 14. Kf1 $17) 13. Qf3 Nf6 14. O-O-O Qf5 15. Rde1 $4 {strolling
merrily down the path to disaster} (15. Qe3 $142 $17) 15... g5 $19 16. Ne2 gxf4
17. Ng3 Qd7 18. Qxf4 e6 19. Re3 (19. h4 {is not the saving move} Rc8 $19) 19...
Bd6 20. Qg5 Bxg3 (20... Kf8 $5 {keeps an even firmer grip} 21. Rf3 $19) 21.
fxg3 (21. Qxg7 {is not much help} Ke7 22. Qxg3 Rag8 $19) 21... Ke7 22. g4 Rh6 (
22... Kf8 $142 {seems even better} 23. Rf1 $19) 23. Qe5 (23. Rf1 {cannot
change destiny} Rg6 24. Qh4 $19) 23... Qd6 (23... Nxg4 {and Black can already
relax} 24. Qg5+ Nf6 25. Rb3 $19) 24. Qf5 $4 {but even a better move would not
have saved the game} (24. Qxd6+ $142 Kxd6 25. g5 $19) 24... Ne4 $19 25. Qf3 (
25. Qe5 {cannot change what is in store for White} Qxe5 26. dxe5 Nf2 $19) 25...
Rf6 26. Qg2 (26. Qe2 {doesn't get the bull off the ice} Rf2 27. Qd3 c5 $19)
26... Qf4 (26... Rf2 $142 {and Black has reached his goal} 27. Qf3 Rxf3 28.
Rxf3 e5 $19) 27. Rhe1 Qf2 (27... Nd6 $142 {might be the shorter path} 28. Qg3
Qxd4 29. g5 $19) 28. Qh1 (28. Qxf2 {desperation} Rxf2 29. Rb3 $19) 28... Qd2+
29. Kb1 Rf2 30. Rb3 Qxc2+ 31. Ka1 Kd6 (31... Qc4 {seems even better} 32. Qg1
$19) 32. Rc1 Qe2 33. Re1 (33. Qd1 {does not improve anything} Qxd1 34. Rxd1 g5
$19) 33... Rh2 (33... Qc4 $5 {keeps an even firmer grip} 34. Qg1 $19) 34. Qg1
Qf2 35. Rb7 (35. Qxf2 {does not help much} Rxf2 36. Rc1 g5 $19) 35... a5 (35...
c5 $5 {and Black can already relax} 36. Qxf2 Rxf2 37. dxc5+ Nxc5 38. Rb5 $19)
36. Rxf7 (36. Qxf2 {there is nothing else anyway} Rxf2 37. Rc1 $19) 36... Qxb2#
0-1

[Event "SapporoAutumn2023"]
[Site "?"]
[Date "2023.10.08"]
[Round "1.4"]
[White "Ito, Katsuhide"]
[Black "Kawamura, Takuto"]
[Result "0-1"]
[ECO "B47"]
[WhiteElo "1164"]
[BlackElo "1595"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "78"]
[SourceVersionDate "2023.10.23"]

{[%mdl 8192] B47: Sicilian: Taimanov: 5 Nc3 Qc7 6 f4, 6 g3 and 6 Be2} 1. e4 c5
2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Nf3 {Black is behind in
developement. Black's piece can't move: c8} (6. Bg5 a6 7. Qd2 Ne5 8. f4 Nc4 9.
Bxc4 Qxc4 10. O-O-O Bb4 11. Nde2 f6 12. Bh4 Nh6 13. g4 O-O 14. g5 fxg5 15. Bxg5
Nf7 16. Bh4 Nd6 17. Qe3 Rf7 18. Kb1 Nb5 19. Rd3 Nxc3+ 20. Nxc3 b5 {Milos,G 
(2560)-Granda Zuniga,J (2590) Buenos Aires 1993 1/2-1/2 (54)}) (6. a3 a6 7. g3
Nf6 8. Nb3 Be7 9. Bg2 O-O 10. O-O d6 11. f4 Rb8 12. Be3 b5 13. Qe2 Bb7 14. g4
Nd7 15. Qf2 Na5 16. Nxa5 Qxa5 17. g5 Rfe8 18. Bd4 Qc7 19. h4 Bf8 20. Rae1 Bc6 {
Soukal,R (2199)-Novak,P (2254) Czechia 2001 1/2-1/2 (45)}) 6... Nf6 $146 {
White has an active position} (6... a6 7. a3 Nf6 8. Bd3 Be7 9. O-O O-O 10. Qe2
d6 11. h3 b5 12. Bg5 Bb7 13. Rfe1 Rfe8 14. Rad1 b4 15. Nb1 Nd7 16. Bxe7 Rxe7
17. c3 bxc3 18. Nxc3 Nde5 19. Nxe5 Nxe5 20. Bb1 Rc8 21. Rd4 {Pihajlic,A (2175)
-Maric,A (2365) Pula 1989 0-1 (40)}) 7. Be2 {Black's piece can't move: c8} Bb4
{White has an active position} 8. O-O (8. Qd3 $5 $11) 8... Bxc3 $15 9. bxc3
Nxe4 10. Bb2 O-O {Black castles and improves king safety} 11. Bd3 Nf6 (11... f5
12. c4 Nc5 13. Qd2 $17) 12. c4 (12. Ba3 Re8 13. Bd6 Qa5 $11 (13... Qxd6 $4 14.
Bxh7+ Kxh7 15. Qxd6 $18)) 12... e5 $15 {Black has a new backward pawn: d7.
Black's piece can't move: c8} 13. Re1 Re8 14. Qe2 (14. c5 b6 15. Bb5 bxc5 16.
Bxc6 Qxc6 17. Nxe5 Qa4 $15) 14... d6 15. c5 (15. Rab1 b6 $17) 15... Bg4 (15...
d5 16. Nd4 (16. Bxe5 $2 {is a blank shot} Nxe5 17. Nxe5 Ng4 18. Nxg4 Rxe2 19.
Bxe2 Qxc5 $19) 16... Nxd4 17. Bxd4 $17) 16. cxd6 Qxd6 17. Be4 (17. Bb5 Re6 18.
h3 Nd4 19. Bxd4 exd4 $17) 17... Nd4 (17... Bxf3 18. Bxf3 e4 19. Bxf6 gxf6 20.
Bh5 $17 (20. Bxe4 $2 {is inferior since it leads to} f5 $19)) 18. Qd3 Rad8 (
18... Bxf3 $142 19. Bxf3 Nxf3+ 20. Qxf3 e4 $17) 19. Ng5 $2 (19. Bxd4 $142 Nxe4
20. Rxe4 Bxf3 21. Qxf3 exd4 22. Rxe8+ Rxe8 23. Qxb7 $15) 19... h6 $4 {spoils
everything} (19... Nxe4 $5 20. Nxe4 Qc6 21. Bxd4 Rxd4 22. Qe3 $19) 20. Nxf7 $4
{not a good decision, because now the opponent is right back in the game} (20.
Bh7+ $142 {and the scales tip in favour of White} Nxh7 21. Qxh7+ Kf8 22. Ne4
$18) 20... Kxf7 $17 21. Bxd4 (21. Bg6+ Kg8 22. Bxd4 Qxd4 23. Bxe8 Qxd3 24. cxd3
Rxe8 $17) 21... Qxd4 (21... Nxe4 $5 22. Rxe4 Qg6 23. Rae1 $19) 22. Bg6+ Kf8 23.
Qa3+ $4 {sad, but how else could White save the game?} (23. Bxe8 $142 Qxd3 24.
cxd3 Rxe8 25. Rab1 $19) 23... Re7 24. h3 Be6 (24... Be2 $142 {might be the
shorter path} 25. Rab1 Ba6 26. Re3 $19) 25. Rad1 (25. c3 {is still a small
chance} Qd5 26. Qxa7 $19) 25... Qxd1 26. Rxd1 Rxd1+ 27. Kh2 b6 28. Qf3 Rd8 29.
Be4 (29. a4 {hardly improves anything} Bf7 30. Bxf7 Kxf7 $19) 29... Bxa2 30. g4
(30. Bf5 {cannot undo what has already been done} Rd4 31. Qc3 Bc4 $19) 30...
Bd5 31. Bxd5 Rxd5 32. h4 (32. Kg1 {does not solve anything} Kf7 $19) 32... e4 (
32... Rd4 $142 $5 {makes it even easier for Black} 33. Kh3 Rxg4 34. Qe3 $19)
33. Qf4 {[%cal Yg4g5] White intends g5} Ree5 34. g5 (34. c4 {the last chance
for counterplay} Rc5 35. Kg3 $19) 34... hxg5 35. hxg5 (35. Qc1 {a last effort
to resist the inevitable} gxh4 36. Qf4 $19) 35... Rxg5 36. Qb8+ Kf7 37. Qxa7+
Kg6 38. Qxb6 (38. Qb8 {a fruitless try to alter the course of the game} Rd2 39.
Kh1 Rxf2 40. Qd6 e3 41. Qd3+ Kh6 42. Qd6 e2 43. Qb4 Rh5+ 44. Kg1 Rf1+ 45. Kg2
Rg5+ 46. Kh2 Ng4+ 47. Qxg4 Rxg4 48. Kh3 Kg5 49. Kh2 e1=Q 50. Kh3 Rh1#) 38...
Rg4 39. Qe3 Rh5+ (39... Rh5+ 40. Qh3 Rxh3+ 41. Kxh3 Kf5 42. f4 exf3 43. Kh2 f2
44. c4 f1=Q 45. c5 Qg2#) 0-1

[Event "SapporoAutumn2023"]
[Site "?"]
[Date "2023.10.08"]
[Round "2.1"]
[White "Kawamura, Takuto"]
[Black "Yamada, Akihiro"]
[Result "0-1"]
[ECO "E11"]
[WhiteElo "1595"]
[BlackElo "1966"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "104"]
[SourceVersionDate "2023.10.23"]

{[%mdl 8192] E11: Bogo-Indian} 1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. g3 Bb4+ 5. Bd2
Be7 6. Bg2 O-O 7. Qc2 b6 (7... Nbd7 8. O-O c5 9. dxc5 Nxc5 10. Rd1 Bd7 11. cxd5
exd5 12. Nc3 Rc8 13. Be3 Nce4 14. Bd4 Bc5 15. Qb3 Bxd4 16. Nxd4 Nxc3 17. bxc3
Qa5 18. Qxb7 Rxc3 19. Nb3 Qa3 20. Nd4 Qa5 21. Nf3 Qa3 22. Nd4 {Ruck,R (2485)
-Sokolov,A (2565) Basel 1999 1/2-1/2}) 8. cxd5 exd5 9. O-O Bb7 10. b4 $146 (10.
Bf4 Na6 11. Nc3 c5 12. Rad1 Qc8 13. Be5 h6 14. Nh4 Nb4 15. Nf5 Qe6 16. Qb1 Rad8
17. Nxe7+ Qxe7 18. Bxf6 Qxf6 19. dxc5 bxc5 20. a3 Na6 21. Nxd5 Bxd5 22. Bxd5
Nc7 23. Bc4 Rb8 24. Rd2 Nb5 {Rausis,I (2496)-Khanukov,B (2358) Bad Godesberg
2012 1-0 (64)}) (10. Ne5 c5 11. Nc3 Na6 12. Rfd1 cxd4 13. Nb5 Qe8 14. Nxd4 Rc8
15. Bc3 Bb4 16. Qf5 Bxc3 17. bxc3 Rxc3 18. Ng4 Ne4 19. Qf4 Nac5 20. f3 Ne6 21.
Qe5 Nxd4 22. Rxd4 Qxe5 23. Nxe5 Nf6 24. Rad1 h6 {Gaede,D (2264)-Moshtael,W 
(2200) Germany 2015 0-1 (40)}) 10... c6 11. a3 Nbd7 12. Bc3 (12. Nc3 Bd6 $14)
12... Rc8 13. Nbd2 Re8 14. Rac1 Bf8 15. Rfe1 h6 {Covers g5} 16. Bb2 (16. Bh3
Rc7 $14) 16... Bd6 17. Nh4 Bf8 18. Nf5 g6 19. Nh4 Bg7 20. Rcd1 (20. Qb3 Nf8 $14
) 20... Rc7 (20... c5 $5 $11) 21. e4 dxe4 22. Nxe4 Nxe4 23. Bxe4 Nf6 24. Bf3
Rxe1+ 25. Rxe1 Nd5 {A sound move} 26. Qe2 (26. Be4 $142 $5 $11 {should be
investigated more closely}) 26... Re7 $15 {Black threatens to win material:
Re7xe2} 27. Qd2 Rxe1+ 28. Qxe1 c5 29. bxc5 (29. Qe2 cxb4 30. axb4 a6 $15) 29...
bxc5 $17 30. Qd2 Qd6 $4 {hands over the advantage to the opponent} (30... Qb6
$142 $17) 31. Bxd5 $4 {throws away a nice position} (31. dxc5 $142 {a pity
that White didn't try this} Qd7 32. Bxg7 Kxg7 33. Qd4+ Kg8 34. Be4 $18) 31...
Bxd5 $4 {makes life more difficult} (31... Qxd5 $142 {nails it down} 32. f3
cxd4 $19) 32. dxc5 $15 Qxc5 {Black has the pair of bishops. .} 33. Qc1 Qe7 34.
Bxg7 Kxg7 35. Ng2 (35. Qd1 Qe4 36. f3 Qe3+ 37. Kg2 Be6 38. Qa1+ Kg8 $17) 35...
Qe4 36. Qf1 (36. Qc3+ $142 $5 Kh7 37. f3 Qxf3 38. Qxf3 Bxf3 39. Ne3 $17) 36...
Qf3 $19 37. h4 Qxa3 (37... a5 38. Kh2 Qxa3 39. Ne3 $19) 38. Nf4 (38. Ne3 Bc6
$19) 38... Be4 39. Qe2 (39. Qd1 $142 Kh7 40. Qe2 $19) 39... Qf3 40. Qxf3 Bxf3
41. Kf1 Kf6 42. Nd3 Kf5 43. Ke1 Ke4 44. Kd2 Kd4 45. Nb2 (45. Ne1 Be4 46. f3 Bb7
47. Nc2+ Kc5 $19) 45... a5 46. Kc2 (46. Na4 Bc6 47. Nc3 a4 $19) 46... Bc6 47.
Nd1 (47. g4 {doesn't change anything anymore} f6 $19) 47... Ke4 (47... Ba4+
$142 {secures victory} 48. Kb2 Bxd1 $19) 48. Kd2 (48. Ne3 {is not much help}
Kf3 $19) 48... Kf3 49. Ke1 (49. Ne3 {is no salvation} Kxf2 50. Nc4 a4 $19)
49... a4 50. Ne3 (50. Kd2 {does not solve anything} a3 51. Nc3 Bd5 $19) 50...
a3 51. Nc2 a2 52. Na1 Ba4 0-1

[Event "SapporoAutumn2023"]
[Site "?"]
[Date "2023.10.08"]
[Round "2.2"]
[White "Yoshii, Yukihiko"]
[Black "Ishii, Hibiki"]
[Result "0-1"]
[ECO "A28"]
[WhiteElo "1685"]
[BlackElo "1365"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "102"]
[SourceVersionDate "2023.10.23"]

{[%mdl 8256] A28: English Opening: Four Knights Variation} 1. c4 Nf6 2. Nc3 e5
3. Nf3 Nc6 4. e3 Bb4 5. Be2 (5. d3 e4 6. dxe4 Nxe4 7. Qc2 Bxc3+ 8. bxc3 Qe7 9.
Be2 d6 10. Nd4 O-O 11. O-O f5 12. f3 Nc5 13. Nb3 Be6 14. Nxc5 dxc5 15. e4 f4
16. Rd1 Ne5 17. Qb3 b6 18. a4 Rf6 19. a5 Raf8 {Xu,J (2535)-Nikolic,P (2625)
Biel 1993 0-1 (48)}) 5... Bxc3 $146 (5... O-O 6. O-O Re8 (6... Bxc3 7. bxc3 d6
8. Qc2 e4 9. Nd4 Ne5 10. f3 c5 11. Nb3 Be6 12. fxe4 Bxc4 13. Bxc4 Nxc4 14. d3
Ne5 15. c4 Nfd7 16. Bd2 Rb8 17. h3 Qe7 18. a4 Nc6 19. a5 Rfe8 20. Nc1 b5 21.
axb6 {Nguyen,A (2479)-Nguyen Huynh Minh,H (2451) Da Lat 2011 1/2-1/2 (46)}) (
6... e4 7. Ne1 Re8 8. f3 exf3 9. gxf3 d5 10. cxd5 Nxd5 11. Kh1 Re6 12. f4 Rh6
13. Nf3 Bg4 14. Rg1 Nf6 15. d3 Qd7 16. a3 Bf8 17. Ne5 Bxe2 18. Qxe2 Nxe5 19.
fxe5 Ne8 20. d4 Re6 21. Bd2 {Hauchard,A (2483)-Libiszewski,F (2482) Lausanne
2006 1/2-1/2}) 7. a3 (7. Nd5 Bf8 8. d3 d6 9. e4 Nxd5 10. cxd5 Ne7 11. d4 Ng6
12. dxe5 dxe5 13. Bb5 Bd7 14. Qb3 Rb8 15. Bxd7 Qxd7 16. Be3 b6 17. Nd2 c5 18.
dxc6 Qxc6 19. Rac1 Qb7 20. Rfd1 Nf4 21. Bxf4 exf4 {Schmidt,H (2368)-Lampert,J 
(2279) Bargteheide 2012 1/2-1/2 (53)}) 7... Bxc3 8. bxc3 d6 9. Ne1 Ne7 10. d3
c6 11. a4 Be6 12. a5 d5 13. c5 Qc7 14. Qa4 Ng6 15. Bd2 a6 16. g3 e4 17. d4 h5
18. Ng2 Bg4 19. f3 exf3 20. Bxf3 {Nimzowitsch,A-Reti,R Breslau 1925 0-1 (62)})
6. dxc3 b6 7. O-O O-O {Black castles and improves king safety} 8. Qc2 Bb7 9. e4
h6 {Consolidates g5} 10. Bd3 d6 11. b4 a5 {Black threatens to win material:
a5xb4} 12. b5 {White threatens to win material: b5xc6} Nb8 13. h3 {Controls g4}
(13. Nh4 Nbd7 14. Nf5 Nc5 $11) 13... Nbd7 $15 14. Be3 Re8 (14... Nh5 15. Rab1
$17) 15. a4 (15. Nh4 Ng4 16. hxg4 Qxh4 $11) 15... Nf8 16. Rfe1 Ne6 17. Rad1 Nd7
18. Rd2 Qf6 19. Rde2 g5 (19... Rad8 20. Qb1 $17) 20. Nh2 Nf4 21. Bxf4 gxf4 (
21... Qxf4 $2 22. Ng4 h5 23. g3 $18) 22. f3 (22. Rd1 $5 $15) 22... h5 23. Rf2
Qg5 24. Kh1 Kh8 25. Rg1 Rg8 26. Qd1 Qh4 27. Qe2 Nc5 28. Bc2 Rg7 29. Nf1 (29.
Re1 $19) 29... Rag8 30. Kh2 (30. Qe1 $19) 30... Bc8 31. Kh1 Bxh3 $1 {
Deflection: g2} 32. Nh2 (32. gxh3 Qxh3+ {Mate attack Deflection Pinning}) (32.
Z0 $140 Bxg2# {Mate threat}) 32... Be6 33. Qf1 Bd7 34. Qe2 Ne6 (34... Rg3 {
might be the shorter path} 35. Rd1 $19) 35. Rff1 (35. Rd1 {doesn't get the cat
off the tree} Rg3 $19) 35... Rg3 36. Qe1 (36. Rc1 {does not win a prize} Nc5
$19) 36... Ng5 37. Bd1 (37. Qd2 Bh3 $1 {it's all over} 38. c5 (38. gxh3 $4 Kh7
$19) 38... bxc5 39. Rf2 $19 (39. gxh3 Nxh3 40. Rxg3 Qxg3 $19)) 37... Be6 38.
Be2 f5 (38... Nh3 $142 $5 {makes it even easier for Black} 39. Rf2 $19) 39.
exf5 (39. c5 {does not improve anything} fxe4 40. cxd6 exf3 41. Bxf3 Nxf3 42.
Rxf3 cxd6 $19) 39... Bxf5 40. Qd1 (40. Qd2 {cannot change what is in store for
White} Nh3 $1 $19 {Decoy: h3}) 40... Be6 (40... Bh3 {seems even better} 41. Rf2
(41. gxh3 $143 Nxh3 42. Qe1 Rxg1+ 43. Rxg1 Qxe1 44. Nf1 Rxg1+ 45. Kh2 Qxe2+ 46.
Kxh3 Rh1+ 47. Nh2 Rxh2#) 41... Bxg2+ 42. Rgxg2 $19) 41. Qe1 (41. Qc2 {doesn't
do any good} Nh3 $1 {the end of the story} 42. Qe4 Nxg1 43. Rxg1 R3g7 $19)
41... Nf7 (41... Bh3 $142 {and Black wins} 42. c5 (42. gxh3 $143 Nxh3 43. Rxg3
fxg3 44. Rg1 Nxg1 45. Qxg1 gxh2 46. Qc1 Qf6 47. Qe3 Qg7 48. Qh6+ Qxh6 49. f4
Qxf4 50. Bg4 Rxg4 51. c5 Rg1#) 42... Bxg2+ 43. Rxg2 $19) 42. Bd3 (42. Qf2 {
doesn't improve anything} Nh6 43. Re1 Qg5 $19) 42... Qg5 (42... Nh6 $142 $5 {
might be the shorter path} 43. Qe4 Bf5 44. Qxf5 Nxf5 45. Bxf5 $19) 43. Rf2 (43.
Qe4 {cannot change destiny} Qg7 44. Qe2 h4 $19) 43... Nh6 44. Qf1 (44. c5 {
doesn't change the outcome of the game} Ng4 $1 {Deflection: f3} 45. fxg4 hxg4
$19) 44... Nf5 (44... Ng4 $142 {makes it even easier for Black} 45. fxg4 hxg4
46. Qe2 Rxd3 47. g3 (47. Qxd3 g3 48. Ra1 Qh4 49. Kg1 Qxh2+ 50. Kf1 gxf2 51. Qf3
Qg1+ 52. Ke2 Rxg2 53. Qh5+ Kg7 54. Rf1 Bxc4+ 55. Kf3 Qxf1 56. Qg4+ Rxg4 57.
Kxg4 Qg2+ 58. Kh4 f1=Q 59. Kh5 Qfh1#) 47... fxg3 48. Rfg2 Bxc4 49. Qe4 $19) 45.
Bxf5 Bxf5 46. Qd1 (46. Qe2 {doesn't get the bull off the ice} Rh3 $1 {
Deflection: g2} 47. Rd1 Rh4 $19) 46... Be6 (46... h4 {keeps an even firmer grip
} 47. c5 h3 48. Qe2 bxc5 49. c4 $19) 47. Qf1 (47. c5 {does not help much} h4
48. cxd6 h3 $19) 47... Qg7 (47... h4 $142 $5 {seems even better} 48. c5 bxc5
49. Qe2 $19) 48. Qd3 (48. c5 {cannot undo what has already been done} bxc5 49.
b6 cxb6 $19) 48... Qf7 (48... Rh3 $142 {and Black can already relax} 49. Ra1
Rh4 $19) 49. Nf1 (49. c5 Bf5 50. Qd1 dxc5 51. Re2 $19) 49... Bxc4 50. Qd2 (50.
Qe4 {does not save the day} Bxf1 51. Rgxf1 h4 $19) 50... Bxf1 51. Rgxf1 Qe7 (
51... Qe7 52. Re1 Qh4+ 53. Kg1 Rh3 $19) 0-1

[Event "SapporoAutumn2023"]
[Site "?"]
[Date "2023.10.08"]
[Round "2.3"]
[White "Okimura, Mikiko"]
[Black "Nishimori, Toshiyuki"]
[Result "0-1"]
[ECO "E16"]
[WhiteElo "400"]
[BlackElo "1604"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "46"]
[SourceVersionDate "2023.10.23"]

{[%mdl 8192] E16: Queen's Indian: 4 g3 Bb7 5 Bg2 Bb4+} 1. d4 Nf6 2. c4 e6 3.
Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ 6. Nbd2 O-O 7. O-O Nc6 $146 (7... Qc8 8. a3 Bxd2
9. Bxd2 d5 10. cxd5 Bxd5 11. Rc1 Qb7 12. Bg5 Nbd7 13. Bxf6 Nxf6 14. Qa4 Rfc8
15. Ne1 Bxg2 16. Nxg2 c5 {1/2-1/2 (16) Uhlmann,W-Taimanov,M Palma de Mallorca
1970}) (7... a5 8. Nb1 (8. Qc2 d5 9. Ne5 Be7 10. b3 Na6 11. Bb2 c5 12. dxc5
Nxc5 13. Rfd1 Qc7 14. Rac1 Rac8 15. cxd5 Bxd5 16. Bxd5 Nxd5 17. Ne4 Rfd8 18.
Nxc5 Bxc5 19. Qe4 Qe7 20. Qg4 Nf6 21. Qf3 Nd5 22. e4 Nf6 {Vukic,M (2485)
-Kurajica,B (2515) Vrsac 1979 1/2-1/2 (42)}) 8... Be7 9. Re1 Qc8 10. d5 exd5
11. cxd5 Bxd5 12. e4 Bxe4 13. Rxe4 Nxe4 14. Qd5 Nxg3 15. hxg3 c6 16. Qh5 d5 17.
Bh3 Qb7 18. Bf5 g6 19. Qh6 Re8 20. Ng5 Bxg5 21. Bxg5 f6 22. Bxg6 {Williams,S 
(2426)-Howell,D (2698) Coventry 2015 0-1}) 8. a3 Bxd2 9. Bxd2 {White has the
pair of bishops} Ne4 10. Bg5 $4 {gives the opponent counterplay} (10. Bf4 $142
$14 {was possible}) 10... Nxg5 $19 11. Qd2 Nxf3+ 12. Bxf3 Qf6 13. e4 (13. Rfd1
$19 {there is nothing better in the position}) 13... Rab8 (13... Qxf3 $142 {
and Black can already relax} 14. Rfe1 $19) 14. Qe2 (14. Bg2 {otherwise it's
curtains at once} Nxd4 15. Rad1 $19) 14... Nxd4 15. Qe3 Nxf3+ 16. Kg2 Ne5 17.
Rfd1 d6 18. f4 Nxc4 19. Qf3 Qxb2+ 20. Kf1 Qxh2 (20... Nd2+ $142 {keeps an even
firmer grip} 21. Rxd2 Qxd2 $19) 21. Qg2 Ne3+ 22. Kf2 (22. Ke1 {is not the
saving move} Qxg2 23. Ra2 Qf1+ 24. Kd2 Qf2+ 25. Kc3 Qxa2 26. Kd3 Nxd1 27. e5
dxe5 28. fxe5 Rbd8#) 22... Qxg2+ 23. Ke1 (23. Kxe3 {a fruitless try to alter
the course of the game} Ba6 24. Ra2 Qxa2 25. Rd2 Qc4 26. Rb2 Qc3+ 27. Kf2 Qxb2+
28. Kg1 Bd3 29. a4 Bxe4 30. Kf1 Bf3 31. g4 Qe2+ 32. Kg1 Qg2#) 23... Nc2# 0-1

[Event "SapporoAutumn2023"]
[Site "?"]
[Date "2023.10.08"]
[Round "2.4"]
[White "Takeuchi, Hiroshi"]
[Black "Nakamura, Mitsyru"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "1410"]
[BlackElo "1388"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "66"]
[SourceVersionDate "2023.10.23"]

{D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4} 1. d4
d5 2. Bf4 Nf6 3. e3 e6 4. Nf3 c5 5. c3 Nc6 6. h3 h6 $146 {Secures g5} (6... Bd6
7. Bxd6 Qxd6 8. Nbd2 O-O 9. Be2 (9. Bd3 e5 (9... Rd8 10. O-O b6 11. Qe2 e5 12.
dxe5 Nxe5 13. Nxe5 Qxe5 14. Rfd1 Bb7 15. Ba6 Bc6 16. Bb5 Qe8 17. Bxc6 Qxc6 18.
Qa6 Rd7 19. Nf3 Qe6 20. a4 Rb8 21. Qb5 Ne4 22. Qb3 Rd6 23. Qc2 Rbd8 24. Qe2 {
Hennig,D (2345)-Backwinkel,P (2360) Germany 1990 1-0 (60)}) 10. dxe5 Nxe5 11.
Nxe5 Qxe5 12. O-O Be6 13. Re1 Rad8 14. Qa4 Qc7 15. Rac1 b6 16. a3 h6 17. b4
Rfe8 18. bxc5 bxc5 19. Rb1 Rb8 20. Rxb8 Rxb8 21. Rb1 Rxb1+ 22. Bxb1 Qb6 23. Qc2
Kf8 {Drazic,S (2415)-Grandelius,N (2600) Skopje 2014 1/2-1/2 (52)}) 9... b6 (
9... e5 10. dxe5 Nxe5 11. Nxe5 Qxe5 12. Nf3 Qc7 13. Qd3 Bd7 14. O-O Rfd8 15.
Rad1 Bc6 16. Nd2 Rd6 17. Rfe1 Rad8 18. Qb1 b6 19. Bf3 g6 20. Nf1 Nd7 21. c4 Ne5
22. Bxd5 Bxd5 23. cxd5 Rxd5 24. e4 {Szollosi,L (2202)-Szeberenyi,A (2328)
Hungary 2015 0-1 (40)}) 10. O-O Rd8 11. Bb5 Ne7 12. Ne5 a6 13. Bd3 Nd7 14.
Bxh7+ Kf8 15. Nxd7+ Bxd7 16. Bd3 e5 17. dxe5 Qxe5 18. Qe2 Bc6 19. f4 Qf6 20.
Nf3 Re8 21. Ne5 {Ehrke,M (2225)-Rosin,W (2230) Germany 1987 1/2-1/2 (97)}) (
6... cxd4 7. cxd4 Ne4 8. Nc3 $11) 7. Nbd2 $11 c4 {Black wins space} 8. Be2 Be7
(8... Bd6 9. Qc2 $11) 9. O-O $14 O-O 10. Qc2 b5 11. Rfe1 (11. b3 Qa5 $14) 11...
Bb7 $11 12. e4 dxe4 13. Nxe4 Qb6 14. Nxf6+ Bxf6 15. Bg3 Ne7 16. Ne5 Rad8 17.
Rad1 (17. Ng4 $5 $14) 17... Nf5 $11 18. Bh2 Nh4 {Black threatens to win
material: Nh4xg2} 19. Bf1 Bg5 20. f4 {White threatens to win material: f4xg5} (
20. b3 cxb3 21. axb3 a5 $11) 20... Bf6 $15 21. Qf2 Nf5 22. Ng4 Be7 23. Ne3 Nd6
24. f5 Ne4 25. Qe2 (25. Qc2 Rfe8 $17) 25... Bg5 (25... Bh4 $5 26. a4 $19) 26.
Qg4 Rfe8 27. h4 (27. a4 exf5 28. Qxf5 Nxc3 29. bxc3 Bxe3+ 30. Kh1 Rd5 $17)
27... Bxe3+ 28. Rxe3 Nf6 (28... e5 $5 $17) 29. Qh3 e5 $4 {letting the wind out
of his own sails} (29... Nd5 $142 30. Re5 exf5 $17) 30. Rxe5 $16 Ne4 31. Re1 f6
32. Rxe8+ Rxe8 33. Be2 Qc6 0-1

[Event "SapporoAutumn2023"]
[Site "?"]
[Date "2023.10.08"]
[Round "3.1"]
[White "Ishii, Hibiki"]
[Black "Yamada, Akihiro"]
[Result "1-0"]
[ECO "B90"]
[WhiteElo "1365"]
[BlackElo "1966"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "79"]
[SourceVersionDate "2023.10.23"]

{[%mdl 8192] B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6
Be3 e5} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3
Be7 8. f3 Be6 9. Qd2 Nbd7 10. O-O-O a5 $146 (10... Rc8 11. g4 (11. Kb1 Nb6 12.
g4 h6 13. h4 Nfd7 14. Be2 Qc7 15. Rh2 h5 16. gxh5 Rxh5 17. f4 Rxh4 18. Rxh4
Bxh4 19. f5 Bc4 20. Rh1 Be7 21. Rh8+ Bf8 22. Bxb6 Qxb6 23. Bxc4 Qg1+ 24. Nc1
Rxc4 25. Qxd6 Qc5 {Tolnai,T (2485)-Stratil,L (2415) Berlin West 1988 1-0 (42)})
11... Nb6 12. g5 Nfd7 13. Rg1 Qc7 14. Kb1 Nc4 15. Bxc4 Qxc4 16. h4 b5 17. Qg2
b4 18. Nd5 Bd8 19. f4 f5 20. gxf6 gxf6 21. fxe5 dxe5 22. Bh6 f5 23. exf5 Bxf5
24. Nd4 Qxd4 25. Rxd4 {Byrne,R (2510)-Balashov,Y (2570) Moscow 1971 1-0}) (
10... h5 11. Nd5 (11. h4 Rc8 12. g3 b5 13. Bh3 Nb6 14. Bxb6 Qxb6 15. Nd5 Nxd5
16. Bxe6 fxe6 17. exd5 exd5 18. Qxd5 Qc6 19. Qe4 O-O 20. Rhf1 Qxe4 21. fxe4 g5
22. hxg5 Bxg5+ 23. Kb1 Rxf1 24. Rxf1 Rc4 25. Re1 Kf7 {Pisk,P (2310)-Civin,T 
(2270) Czechia 1999 1/2-1/2 (56)}) 11... Nxd5 12. exd5 Bf5 13. Bd3 Bxd3 14.
Qxd3 Bg5 15. Kb1 Bxe3 16. Qxe3 O-O 17. h4 Nf6 18. c4 Rc8 19. Qd3 Qd7 20. Rhe1
Rfe8 21. Nd2 b5 22. cxb5 axb5 23. Rc1 g6 24. Ne4 Kg7 25. Rc6 {Kasimdzhanov,R 
(2465)-Georgiev,K (2645) Metz 1997 0-1 (53)}) (10... Qc7 11. Kb1 b5 12. Nd5
Nxd5 13. exd5 Bf5 14. g4 Bg6 15. h4 h5 16. Bd3 Bxd3 17. Qxd3 g6 18. g5 O-O 19.
f4 Rfe8 20. f5 Kh7 21. Rhf1 Rf8 22. Rf2 Rg8 23. Nd2 Raf8 24. Ne4 Qb8 25. Ng3 {
Halasz,T (2365)-Bacso,G (2205) Budapest 1981 1-0 (36)}) 11. a4 Nb6 (11... O-O
12. g4 $14) 12. Bg5 (12. Bb5+ Nbd7 $16) 12... O-O $14 13. Bxf6 gxf6 {Black has
the pair of bishops} 14. Bb5 {A classical outpost} Nc4 (14... Qc7 15. Qh6 $14)
15. Qe2 $16 Qc7 (15... Nb6 $142 $5 $16) 16. Nd5 $18 Bxd5 17. Rxd5 ({Weaker is} 
17. exd5 Rfc8 18. Rd3 Nb6 $16) 17... Rfc8 18. Rd3 Nb6 19. h4 (19. Kb1 f5 $18)
19... Kh8 (19... f5 $142 $16) 20. Qf2 $4 {White has let it slip away} (20. Kb1
Rd8 $16) 20... Qd8 $4 {Black is ruining his position} (20... Nxa4 $142 {
and Black is still in the game} 21. Qd2 Nb6 $11) 21. h5 (21. Kb1 Rab8 22. Nd2
Nd7 $18) 21... h6 (21... Rab8 22. Nd2 $16) 22. g3 f5 (22... Rab8 23. Qd2 (23.
Nxa5 $143 Nxa4 24. Nc4 Ra8 $14) 23... Kg7 24. Nxa5 Nxa4 25. Bxa4 $16) 23. Rhd1
d5 (23... Kg8 24. Kb1 $16) 24. exd5 Qd6 25. Qe1 (25. g4 Bg5+ 26. Kb1 fxg4 27.
fxg4 Nc4 $18) 25... Nc4 (25... Bf6 26. Kb1 $18 (26. Nxa5 $6 e4 27. Nxb7 Qc7 $11
)) 26. Kb1 (26. Rc3 Nb6 27. Rxc8+ Rxc8 28. Nxa5 Qc7 $18) 26... e4 $2 (26... Bf6
27. c3 $18) 27. fxe4 (27. Rd4 $5 {might be the shorter path} Nxb2 28. R1d2 Bf6
29. fxe4 Bxd4 30. Rxd4 Nxa4 31. Rxa4 Rg8 $18) 27... Nxb2 28. e5 Qa3 29. d6 Nxa4
$4 {simply worsens the situation} (29... Nxd1 30. Qxd1 Bg5 $18) 30. Bxa4 Rxc2
31. Kxc2 Qa2+ 32. Kc3 Rc8+ 33. Kd4 Qxa4+ 34. Ke3 Rc2 (34... Bxd6 {desperation}
35. Rxd6 Qxb3+ 36. R1d3 Qa4 $18) 35. Nd4 Bg5+ 36. Kf3 Qc4 (36... Rh2 {doesn't
improve anything} 37. Nxf5 Qd7 38. Qe4 Rxh5 39. Qg4 $18) 37. Nxf5 (37. Nxc2
$142 {and the rest is a matter of technique} Qc6+ 38. Rd5 Qxc2 $18) 37... Qc6+
(37... Qe6 {is no salvation} 38. Qe4 Rc4 39. Rd4 Rc3+ 40. R1d3 $18) 38. Kg4
Rc4+ (38... Qd7 {does not win a prize} 39. Qxa5 Rc4+ 40. Rd4 $18) 39. Rd4 Rc3 (
39... Rxd4+ {cannot change what is in store for White} 40. Rxd4 Qd7 41. Qxa5
$18) 40. Qe4 (40. Qe4 Qd7 41. Rc4 $18) 1-0

[Event "SapporoAutumn2023"]
[Site "?"]
[Date "2023.10.08"]
[Round "3.2"]
[White "Nishimori, Toshiyuki"]
[Black "Yoshii, Yukihiko"]
[Result "0-1"]
[ECO "B22"]
[WhiteElo "1604"]
[BlackElo "1685"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "80"]
[SourceVersionDate "2023.10.23"]

{[%mdl 8192] B22: Sicilian: 2 c3} 1. e4 e5 2. Nf3 d6 3. h3 Be7 $146 (3... Nf6
4. Nc3 Be7 (4... g6 5. d4 exd4 6. Nxd4 Bg7 7. Be3 O-O 8. Bd3 Re8 9. O-O Nbd7
10. f4 Nc5 11. Qf3 Qe7 12. f5 Ncxe4 13. Nxe4 Nxe4 14. fxg6 fxg6 15. Bc4+ Kh8
16. Rae1 c6 17. c3 Rf8 18. Qd1 Rxf1+ 19. Bxf1 {Linczer,J (2240)-Molnar,B (2151)
Hungary 2007 0-1 (31)}) 5. Bc4 (5. d4 exd4 6. Nxd4 O-O 7. Bc4 c6 8. O-O Re8 9.
Re1 Bf8 10. Bb3 Nbd7 11. f3 Nc5 12. Bg5 Be7 13. Nce2 Nxb3 14. axb3 d5 15. e5
Nd7 16. Bxe7 Qxe7 17. f4 {1/2-1/2 (17) Vincze,R (2187)-Fendrik,L (2198)
Hungary 2007}) 5... O-O 6. O-O c6 7. Bb3 b5 8. a3 a6 9. d3 Bb7 10. Kh1 Nbd7 11.
Nh2 d5 12. exd5 cxd5 13. d4 exd4 14. Qxd4 Bc5 15. Qh4 d4 16. Ne2 Qb6 17. f3 Nd5
18. Rd1 {Zelenika,D (2269)-Sertic,R (2330) Croatia 2005 0-1 (42)}) (3... Bd7 4.
Bc4 Be7 5. d4 Nc6 6. dxe5 Nxe5 7. Nxe5 dxe5 8. Qf3 Nf6 9. Bg5 Bc6 10. Bxf6 Bxf6
11. Nd2 O-O 12. O-O-O Qd4 13. c3 Qc5 14. Kb1 b5 15. Be2 a5 16. Nb3 Qe7 17. h4
a4 18. Na1 {Zharkov,A (2251)-Smirnov,A (2404) Gornozavodsk 2007 0-1}) 4. Bc4
Nf6 5. Qe2 O-O 6. c3 (6. O-O c5 $11) 6... c5 7. O-O Nc6 8. d3 h6 {Prevents
intrusion on g5} 9. Be3 (9. a4 a6 $11) 9... a6 {Secures b5} 10. a3 {
Consolidates b4} b5 {Black threatens to win material: b5xc4} 11. Ba2 Bb7 (11...
d5 12. exd5 Nxd5 13. Nbd2 $11) 12. Rd1 Qc7 (12... d5 13. exd5 Nxd5 14. Nbd2 $11
) 13. Nbd2 Rad8 14. Nf1 (14. b4 cxb4 15. axb4 d5 16. exd5 Nxd5 $11) 14... Rfe8
15. Ng3 Bc8 (15... d5 $11) 16. Nf5 (16. b4 $142 $14 {is the best option White
has}) 16... Bxf5 $17 17. exf5 d5 18. Nh4 c4 19. Nf3 $2 (19. dxc4 bxc4 20. Nf3
Na5 $17) 19... e4 $4 {hands over the advantage to the opponent} (19... cxd3
$142 {makes sure everything is clear} 20. Qd2 Qd7 $19) 20. dxe4 $17 Nxe4 {
Black has a new backward pawn: d5.} 21. Nd4 Bxa3 (21... Bg5 $142 22. Re1 Nc5
$17) 22. Qc2 $2 (22. bxa3 $142 {would keep White in the game} Nxc3 23. Qb2 Nxd1
24. Rxd1 Nxd4 25. Bxd4 $11 (25. Qxd4 $143 Re4 26. Qb6 Qxb6 27. Bxb6 Rde8 $19))
22... Bd6 23. Nf3 Be5 (23... Ne7 $5 24. g4 $19) 24. Nxe5 Nxe5 25. Bb1 Nd3 26.
Rxa6 $4 {White has lost his nerve... understandable when you consider his
position.} (26. Rxd3 cxd3 27. Qxd3 $17) 26... Rd6 {Black threatens to win
material: Rd6xa6} (26... d4 $142 {and Black has triumphed} 27. Bxd4 Rxd4 28.
cxd4 Nexf2 $19) 27. Ra7 (27. Ra2 Qb8 28. Ba7 Qc8 29. Rxd3 cxd3 30. Qxd3 b4 $17
(30... Qxf5 $6 31. f3 $11)) 27... Qd8 (27... Qb8 $5 28. Bd4 Rf6 $17) 28. Rxd3 (
28. Qe2 Nexf2 29. Rf1 d4 30. cxd4 Qb8 $15) 28... cxd3 $15 29. Qxd3 Qh4 (29...
Rd7 $142 $15 {and Black can hope to survive}) 30. Qxb5 $16 Red8 (30... Rdd8 31.
Bd3 $16) 31. Qd3 (31. Bd3 Qf6 $16) 31... Rf6 (31... R6d7 $142 $14) 32. f3 $4 {
throwing away the advantage} (32. Qd4 $142 Rxf5 33. c4 $16) 32... Qe1+ $17 33.
Kh2 Ng3 34. Bg1 Nxf5 35. g4 $4 {causes even greater problems} (35. Bc2 $142 $17
) 35... Qg3+ 36. Kh1 Qxh3+ 37. Bh2 Ng3+ (37... Re6 38. Re7 Rxe7 39. Qd1 Nh4 40.
Qe2 Rxe2 41. Bh7+ Kxh7 42. Kg1 Qg2#) 38. Kg1 $19 g6 (38... Ne4 $142 {seems
even better} 39. Qe2 Rxf3 $19) 39. Ba2 (39. Re7 Rb8 40. b4 $19) 39... Re8 40.
Qd1 (40. Ra8 {hardly improves anything} Rxa8 41. Kf2 Qxh2+ 42. Ke3 Rxa2 43.
Qxd5 Qxb2 44. Kd3 Qe2+ 45. Kd4 Ra4+ 46. Kc5 Ra5+ 47. Kd4 Rf4+ 48. Qe4 Nxe4 49.
fxe4 Qxe4#) 40... Re2 (40... Re2 41. Ra8+ Kg7 42. Rg8+ Kxg8 43. Qxe2 Nxe2+ 44.
Kf2 Qxh2+ 45. Ke3 Re6+ 46. Kd2 Nd4+ 47. Kd3 Nxf3 48. Bxd5 Qe2#) (40... Ne2+ 41.
Qxe2 Rxe2 42. Ra8+ Kg7 43. Rg8+ Kxg8 44. Bxd5 Qg2#) 0-1

[Event "SapporoAutumn2023"]
[Site "?"]
[Date "2023.10.08"]
[Round "3.3"]
[White "Nakamura, Mitsuru"]
[Black "Kawamura, Takuto"]
[Result "0-1"]
[ECO "E27"]
[WhiteElo "1388"]
[BlackElo "1595"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "94"]
[SourceVersionDate "2023.10.23"]

{[%mdl 8192] E27: Nimzo-Indian: S舂isch: 5...0-0 6 f3} 1. d4 Nf6 2. c4 e6 3.
Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 O-O 6. Nf3 $146 (6. Qc2 c5 7. e3 Re8 8. Bd3 d6 9.
Ne2 Qc7 10. O-O Nbd7 11. Ng3 d5 12. cxd5 exd5 13. f3 Nf8 14. e4 cxd4 15. cxd4
Qxc2 16. Bxc2 Kh8 17. e5 Ng8 18. f4 Bd7 19. Bb3 Ne7 20. f5 Bb5 {Reti,
R-Marshall,F Berlin 1928 1/2-1/2 (69)}) (6. Bg5 c5 (6... h6 7. Bh4 d6 8. Nf3
Nbd7 9. Qc2 e5 10. e4 Re8 11. d5 c6 12. Bd3 Nf8 13. O-O Ng6 14. dxc6 bxc6 15.
c5 Nxh4 16. Nxh4 d5 17. Qa4 Bd7 18. Rad1 Qe7 19. exd5 cxd5 20. c6 Bg4 21. Rb1 {
Beyen,R (2280)-Forintos,G (2495) Munich 1958 0-1}) (6... d6 7. f3 c5 8. e4 Qa5
9. Qd2 cxd4 10. cxd4 Nc6 11. Ne2 h6 12. Be3 Bd7 13. Nc3 Rfc8 14. Be2 e5 15. d5
Nd4 16. Bxd4 exd4 17. Qxd4 b5 18. O-O bxc4 19. Rfc1 Qc5 20. Qxc5 Rxc5 21. Rcb1
{Lein,A (2515)-Denker,A (2325) Fairfax 1976 1-0 (33)}) 7. Nf3 h6 8. Bh4 Qa5 9.
Bxf6 Qxc3+ 10. Nd2 gxf6 11. d5 d6 12. g3 exd5 13. Bg2 Re8 14. Rc1 Qxa3 15. Bxd5
Nc6 16. Ne4 Rxe4 17. Bxe4 Nd4 18. Rb1 Bg4 19. Qd3 Qxd3 20. Bxd3 Re8 {
Ivanisevic,I (2638)-Kravtsiv,M (2565) Jerusalem 2015 0-1 (48)}) 6... Nc6 7. e3
b6 8. Bd3 d6 {Controls e5} (8... Ba6 9. e4 d5 10. cxd5 Bxd3 11. Qxd3 exd5 12.
e5 $11) 9. h3 {Covers g4} (9. O-O e5 10. e4 Re8 $14) 9... Na5 10. Qc2 Ba6 {
Black threatens to win material: Ba6xc4} 11. O-O (11. Nd2 $5 $11 {must be
considered}) 11... Bxc4 $17 12. Bxc4 Nxc4 13. Qa4 (13. Nd2 Nxd2 14. Bxd2 d5 $17
) 13... d5 14. Ne5 (14. Nd2 Nd6 $17) 14... Nxe5 $19 15. dxe5 Ne4 16. Qc2 Qd7 (
16... Qg5 $5 17. c4 $19) 17. Bb2 $17 Qb5 18. a4 Qc4 19. Rac1 (19. Rfd1 c5 $17)
19... Nc5 (19... f6 20. exf6 Rxf6 21. f3 $19) 20. Ra1 (20. Ba3 a5 $17) 20...
Rfb8 (20... f6 21. exf6 Rxf6 22. Kh2 $19) 21. Rfd1 Nb3 22. Ra3 Na5 23. Rd4 Qa6
24. Rh4 g6 (24... h6 $19) 25. Rg4 $2 (25. e4 Nc4 26. Ra1 Re8 $17) 25... Kg7 (
25... Nc4 {makes it even easier for Black} 26. Ra2 $19) 26. h4 (26. e4 $142 $5
Nc4 27. Ra1 $17) 26... h5 $19 27. Rg3 (27. Rf4 Nc4 $19) 27... Qc4 28. f4 (28.
Rh3 Qe4 29. Qxe4 dxe4 $19) 28... Kh7 (28... Qe4 {might be the shorter path} 29.
Qe2 Qb1+ 30. Kh2 $19) 29. Rg5 (29. Bc1 Qe4 30. Ra2 Nc4 $19) 29... Kh6 (29...
Qe4 {and Black can already relax} 30. Qxe4 dxe4 31. Ra1 $19) 30. Qd1 (30. Bc1
Qe4 31. Ra2 Kg7 $19) 30... Qe4 31. Qe2 Nc4 32. Bc1 (32. Ra1 $19) 32... Nxa3 33.
Bxa3 c5 34. Bc1 Rg8 (34... Qxa4 {keeps an even firmer grip} 35. f5 exf5 36. e4
Qxe4 37. Rg4+ f4 38. Qxe4 dxe4 39. Rxf4 $19) 35. Kh2 (35. Qd1 {cannot change
destiny} Kh7 $19) 35... Kg7 (35... Qxa4 {and Black can already relax} 36. Qd2
$19) 36. g4 (36. Qa2 {cannot undo what has already been done} Rac8 37. Rg3 d4
$19) 36... hxg4 37. Qxg4 (37. Rxg4 {does not help much} Rh8 (37... Qxa4 $143
38. f5 Qb3 39. Qd2 $19) 38. Kg3 Rad8 $19 (38... Qxa4 $143 39. f5 Qd7 40. fxg6
fxg6 41. Kg2 $19)) 37... Kf8 (37... Qc2+ $142 $5 {keeps an even firmer grip}
38. Qg2 Qxc1 39. h5 $19) 38. h5 (38. Qd1 {doesn't change the outcome of the
game} Rh8 39. Kg3 Ke7 $19) 38... Ke7 (38... Qc2+ $142 {and Black wins} 39. Qg2
Qxc1 40. Qe2 $19) 39. Qh4 (39. Bd2 {is not the saving move} gxh5 40. Qg1 Rg6
41. Rxg6 Qxg6 42. Qxg6 fxg6 $19) 39... Kd7 40. h6 (40. Bd2 {doesn't do any good
} gxh5 41. Qg3 h4 $19) 40... Qc2+ 41. Rg2 Qxc1 42. h7 (42. Re2 {doesn't change
anything anymore} Rh8 43. h7 Qxc3 $19) 42... Rh8 43. Qh6 (43. e4 {does not
improve anything} dxe4 44. Re2 Qxc3 $19) 43... Rag8 (43... Qxc3 $5 {makes it
even easier for Black} 44. e4 dxe4 45. Qh4 $19) 44. Rg3 (44. hxg8=N {does not
save the day} Rxh6+ 45. Nxh6 Qxe3 $19) 44... Rf8 45. Qg7 (45. Rh3 {doesn't get
the cat off the tree} d4 46. exd4 cxd4 $19) 45... Qxc3 46. Rxg6 Qc2+ 47. Kg3 (
47. Kh1 {is not much help} Qxg6 48. Qxg6 fxg6 49. a5 c4 50. axb6 c3 51. Kg2 c2
52. b7 c1=Q 53. b8=R Rxb8 54. Kf3 Rb2 55. f5 Qf1+ 56. Kg4 Rg2+ 57. Kh4 Rxh7#)
47... Qxg6+ (47... Qxg6+ 48. Qxg6 fxg6 49. Kf3 c4 50. Ke2 c3 51. Kd3 Rc8 52.
Ke2 c2 53. f5 gxf5 54. Kf2 c1=Q 55. a5 Rc2+ 56. Kf3 Qg1 57. axb6 Qg4#) 0-1

[Event "SapporoAutumn2023"]
[Site "?"]
[Date "2023.10.08"]
[Round "3.4"]
[White "Okimura, Mikiko"]
[Black "Ito, Katsuhide"]
[Result "0-1"]
[ECO "A10"]
[WhiteElo "400"]
[BlackElo "1164"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "66"]
[SourceVersionDate "2023.10.23"]

{[%mdl 8192] A10: English Opening: Unusual Replies for Black} 1. d4 b6 2. c4
Bb7 3. Nf3 e6 4. g3 Nf6 5. Bg2 Nc6 $146 (5... d6 6. Nc3 (6. O-O Nbd7 7. d5 (7.
Nc3 c5 8. d5 exd5 9. cxd5 Be7 10. e4 O-O 11. e5 Ne8 12. e6 fxe6 13. dxe6 Ndf6
14. Re1 Nc7 15. Nh4 Bxg2 16. Nxg2 d5 17. Bf4 d4 18. Bxc7 Qxc7 19. Ne4 Qc6 20.
Qd3 Nd5 21. Rac1 Rad8 {Ostermeyer,P (2395)-Gerusel,M (2370) Niederdreisbach
1981 1-0 (40)}) 7... exd5 8. Nh4 c6 9. cxd5 c5 10. Nc3 g6 11. e4 Bg7 12. Bf4
Ne5 13. Bxe5 dxe5 14. Nf3 O-O 15. Nd2 Ne8 16. a4 Ba6 17. Re1 Nd6 18. Bf1 c4 19.
b3 Rc8 20. bxc4 Nxc4 {Razuvaev,Y (2470)-Romanishin,O (2560) Minsk 1979 1/2-1/2}
) 6... Ne4 7. Nxe4 Bxe4 8. O-O Be7 9. b3 O-O 10. Bb2 Bf6 11. Qd2 d5 12. Rac1
Na6 13. Rfd1 Rc8 14. c5 c6 15. Bc3 Re8 16. Qb2 Nc7 17. cxb6 axb6 18. a4 Qd6 19.
Ne1 b5 20. Bxe4 {Kuzmin,G (2535)-Romanishin,O (2610) Tallinn 1979 1/2-1/2 (36)}
) (5... c6 6. O-O d5 7. b3 (7. Nbd2 Nbd7 8. Qc2 c5 9. cxd5 exd5 10. e4 dxe4 11.
Ng5 Be7 12. Ndxe4 Nxe4 13. Bxe4 Bxe4 14. Qxe4 h6 15. Re1 hxg5 16. Bxg5 f6 17.
Bf4 Kf8 18. Rad1 c4 19. Bc7 Qe8 20. Qf3 Rc8 21. Bd6 Bxd6 {Sorin,A (2460)-De
Toledo,J (2400) Sao Paulo 1997 1/2-1/2}) 7... Nbd7 8. Bb2 Be7 9. e3 O-O 10. Qe2
Rc8 11. Nc3 Qc7 12. Rac1 Qb8 13. e4 Nxe4 14. Nxe4 dxe4 15. Nd2 c5 16. Nxe4 Bxe4
17. Qxe4 Bf6 18. Rfd1 Rfd8 19. Qe3 a5 20. Rc2 {Nikolic,P (2655)-Seirawan,Y 
(2585) Wijk aan Zee 1995 1/2-1/2 (69)}) 6. O-O Be7 7. Nc3 O-O (7... d5 8. Bf4
$14) 8. b3 (8. e4 Na5 9. e5 Ne4 10. Nxe4 Bxe4 $14) 8... Re8 9. Re1 Bb4 {
Black threatens to win material: Bb4xc3} 10. Qc2 d5 11. a3 Bxc3 {Black forks:
a1, e1+d4} 12. Qxc3 Na5 13. Bg5 (13. Be3 Ne4 14. Qc2 Qe7 $14) 13... dxc4 14.
bxc4 Qd7 $2 (14... Ne4 15. Qxa5 (15. Bxd8 $143 Nxc3 16. Rac1 Bxf3 (16... Rexd8
$6 17. Rxc3 c5 18. dxc5 $11) 17. Bxf3 Nxe2+ 18. Rxe2 Raxd8 $17) 15... bxa5 16.
Bxd8 Raxd8 17. Rab1 $11) 15. Rad1 (15. Ne5 $142 {and White gets the upper hand}
Qd8 16. Bxb7 Nxb7 17. Qf3 $16) 15... Ne4 $11 16. Qd3 (16. Qc2 f6 17. Ne5 fxe5
18. dxe5 Qxd1 19. Rxd1 Nxg5 $15) 16... Qa4 {Black threatens to win material:
Qa4xc4} 17. Nd2 (17. Bf4 $5 $11 {is an interesting alternative}) 17... Nxg5 $17
18. Bxb7 (18. h4 $5 e5 19. d5 $17) 18... Nxb7 19. Kg2 $4 {a blunder in a bad
position} (19. h4 $142 Nh3+ 20. Kg2 Nxf2 21. Kxf2 $17) 19... f5 20. h4 Nf7 21.
e4 Qc6 22. Nf3 (22. Qf3 {does not improve anything} fxe4 23. Nxe4 e5 $19) 22...
Rad8 (22... Nbd6 $142 {and Black can already relax} 23. exf5 exf5 24. Rxe8+
Rxe8 25. Rc1 $19) 23. Qb3 (23. d5 {doesn't do any good} Qa4 24. e5 Nc5 $19)
23... Na5 (23... fxe4 $142 {seems even better} 24. Ng5 Nxg5 25. hxg5 $19) 24.
Qc3 (24. Qb5 {cannot change destiny} Qxc4 25. Qxc4 Nxc4 $19) 24... fxe4 25. Ng5
(25. Nd2 {is not much help} e3+ 26. Nf3 exf2 27. Kxf2 Nd6 $19) 25... Nxg5 26.
hxg5 e3+ 27. Kf1 (27. f3 {a fruitless try to alter the course of the game} Nxc4
28. Rd3 Qd5 $19) 27... Nxc4 28. fxe3 (28. Rxe3 {a last effort to resist the
inevitable} Nxe3+ 29. Qxe3 $19) 28... Qf3+ (28... Qh1+ 29. Kf2 Rf8+ 30. Ke2
Qg2+ 31. Kd3 Ne5#) 29. Kg1 Qxg3+ 30. Kf1 (30. Kh1 {doesn't get the bull off
the ice} Qh3+ 31. Kg1 Rd5 32. Qa5 bxa5 33. Re2 Rxg5+ 34. Kf2 Rf8+ 35. Ke1 Rg1#)
30... Qf3+ (30... Rf8+ 31. Ke2 Qg2+ 32. Kd3 Ne5#) 31. Kg1 Rf8 (31... Rd5 32.
Qa5 bxa5 33. Rd3 Rxg5+ 34. Kh2 Qg2#) 32. Qc2 Nxe3 33. Qf2 (33. Rxe3 {does not
solve anything} Qxe3+ 34. Kg2 Rf4 35. Qxh7+ Kxh7 36. Rh1+ Kg6 37. Rh6+ gxh6 38.
gxh6 Rf2+ 39. Kh1 Qc1#) 33... Qxf2+ (33... Qxf2+ 34. Kh1 Qg2#) 0-1

[Event "SapporoAutumn2023"]
[Site "?"]
[Date "2023.10.09"]
[Round "4.1"]
[White "Kawamura, Takuto"]
[Black "Ishii	, Hibiki"]
[Result "1-0"]
[ECO "A46"]
[WhiteElo "1595"]
[BlackElo "1365"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "87"]
[SourceVersionDate "2023.10.23"]

{[%mdl 64] A46: 1 d4 Nf6 2 Nf3 e6: Torre, London and Colle Systems} 1. d4 Nf6
2. Nf3 e6 3. g3 Nc6 (3... g6 4. Bg5 Be7 5. Nbd2 c5 6. c3 cxd4 7. cxd4 a6 8. e3
d6 9. Bxf6 Bxf6 10. Bg2 O-O 11. O-O {1/2-1/2 (11) Grischuk,A (2779)
-Khismatullin,D (2658) Khanty-Mansiysk 2013}) (3... Be7 4. Bg2 O-O 5. O-O b6 6.
Ne5 c6 7. e4 d6 8. Nd3 d5 9. e5 Nfd7 10. Nf4 Bb7 11. Qg4 Kh8 12. Nd2 c5 13. c3
Nc6 14. Nf3 cxd4 15. cxd4 Ba6 16. Rd1 Rc8 17. h4 Nb4 18. Ng5 {Lizak,P (2450)
-Erenberg,A (2353) Budapest 2015 1/2-1/2 (43)}) 4. Bg2 b6 $146 (4... d6 5. c4 (
5. Bf4 Qe7 6. Nc3 h6 7. Qd2 e5 8. d5 Na5 9. Nb5 exf4 10. Qxa5 Nxd5 11. O-O-O
Nb6 12. Qc3 Kd8 13. Ne5 a6 14. Nxd6 cxd6 15. Rxd6+ Ke8 16. Rxb6 Qc5 17. Qb3
Qxe5 18. Rxb7 Be7 19. Rxe7+ Kxe7 {Skrivanek,J (2160)-Pochinkov,A (2164)
Czechia 2013 1-0 (39)}) 5... e5 6. Nc3 exd4 7. Nxd4 Nxd4 8. Qxd4 Be7 9. O-O O-O
10. b3 Nd7 11. Bb2 Bf6 12. Qd2 Re8 13. Rfd1 a5 14. Nb5 Bxb2 15. Qxb2 Nc5 16.
Qc2 Bd7 {1/2-1/2 (16) Radovanovic,D (2350)-Frink,F (2229) Senta 2008}) 5. O-O
d5 (5... Bb7 6. Nc3 $14) 6. c4 $16 Be7 ({Worse is} 6... dxc4 7. Ne5 Nxe5 8.
Bxa8 $18) 7. Qc2 (7. cxd5 Nxd5 (7... Qxd5 $4 8. Ne5 Nxe5 9. Bxd5 (9. dxe5 $6
Qxd1 10. Rxd1 Nd5 $16) 9... Nxd5 10. dxe5 $18) 8. e4 Nf6 $16) 7... Bb7 8. Bf4 (
8. cxd5 Qxd5 9. Nc3 Qa5 $14) 8... Bd6 (8... O-O 9. Nbd2 $11) 9. cxd5 $14 exd5
10. Bxd6 Qxd6 11. a3 {Secures b4} O-O {Black has an active position} 12. Nc3 a6
{Consolidates b5} 13. b4 Ne7 14. Na4 Ng6 (14... Ne4 15. Rac1 Nc6 16. e3 $11)
15. Rac1 Rac8 (15... Ne8 16. Nb2 $14) 16. Qb3 (16. Bh3 $5 $16) 16... Bc6 17.
Nb2 Bd7 18. Nd3 Ne4 19. Rc2 (19. Nfe5 Ne7 20. Nxd7 Qxd7 $16) 19... f6 {
Prevents intrusion on e5} (19... c5 20. dxc5 bxc5 21. bxc5 Nxc5 22. Rxc5 Rxc5
23. Nxc5 Qxc5 24. e3 $14) 20. Rfc1 (20. Nh4 Rfe8 $16) 20... c6 21. Nd2 Nxd2 22.
Rxd2 Be6 23. Rc3 Ne7 24. Rdc2 Qd7 (24... g5 25. Qa4 $14) 25. Nf4 $16 Bf7 26.
Bh3 f5 27. e3 g5 (27... Qd6 28. Bg2 $16) 28. Nd3 g4 29. Bf1 Rc7 30. Ne5 Qc8 31.
Qa4 b5 32. Qb3 Qe6 33. Qb1 Rfc8 34. Qc1 Be8 35. Nd3 Ra8 36. Nf4 {White
threatens to win material: Nf4xe6} (36. h3 a5 $16) 36... Qf7 37. Rc5 Rac8 (
37... Rca7 38. a4 $16) 38. Bg2 Rd8 39. Nd3 Rdc8 40. Ne5 Qe6 41. a4 Kh8 (41...
bxa4 $5 42. Ra2 Rb7 43. Rxa4 Rb6 $16) 42. axb5 $18 axb5 43. Bf1 (43. Rxb5 $1
Qd6 44. Rb6 Ng6 $18) 43... Rb8 (43... Rb7 44. Ra2 $16) 44. Bxb5 $1 {Deflection:
c6.} (44. Bxb5 Rcb7 45. Bd3 $16) 1-0

[Event "SapporoAutumn2023"]
[Site "?"]
[Date "2023.10.09"]
[Round "4.2"]
[White "Yamada, Akihiro"]
[Black "Yoshii, Yukihiko"]
[Result "1/2-1/2"]
[ECO "C50"]
[WhiteElo "1966"]
[BlackElo "1685"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "65"]
[SourceVersionDate "2023.10.23"]

{[%mdl 8192] C50: Hungarian Defence and Giuoco Pianissimo} 1. e4 e5 2. Nf3 Nc6
3. d4 exd4 4. Bc4 Be7 5. c3 d6 6. cxd4 (6. Qb3 Na5 7. Bxf7+ Kf8 8. Qa4 Kxf7 9.
Qxa5 dxc3 10. Nxc3 c6 (10... Be6 11. Qb5 Rb8 12. Qd3 Bf6 13. O-O Ne7 14. Ng5+
Bxg5 15. Bxg5 h6 16. Bh4 g5 17. Bg3 Qg8 18. Nb5 Qd8 19. f4 Ke8 20. Qc3 Kd7 21.
f5 Bf7 22. Rad1 Nc6 23. Nxd6 Bh5 24. Nxb7+ Bxd1 25. Rxd1+ {Santos,H (2266)
-Ulyanovskyy,V (2280) Caldas da Rainha 2014 1-0}) 11. Qa4 b5 12. Qc2 Bg4 13.
Nd4 Qd7 14. h3 Be6 15. O-O Bc4 16. Rd1 Nf6 17. f4 Rhe8 18. b3 b4 19. Na4 Ba6
20. e5 Kg8 {Matsuura,E (2473)-Pelikian,J (2407) Osasco 2004 1-0 (42)}) 6... h6
$146 {Covers g5} (6... Nf6 7. Nc3 O-O 8. O-O (8. d5 Ne5 9. Be2 Nxf3+ 10. Bxf3
Nd7 11. Be2 Bf6 12. O-O Nc5 13. f3 Be5 14. Na4 b6 15. Rb1 Bd7 16. Nxc5 bxc5 17.
Be3 Rb8 18. Qd2 Rb4 19. f4 Bd4 20. a3 Bxe3+ 21. Qxe3 Rd4 22. Rbd1 Rxd1 {
Pletanek,J (2250)-Friml,A (2155) Czechia 1999 1/2-1/2 (40)}) 8... Bg4 9. Be3 a6
10. Rc1 Qd7 11. Be2 d5 12. e5 Ne4 13. Nd2 Bxe2 14. Qxe2 f5 15. f4 Kh8 16. Ndxe4
fxe4 17. f5 Rad8 18. Qh5 Qe8 19. Qxe8 Rfxe8 20. Na4 Na5 21. Rxc7 {Medeiros,H 
(2165)-Souza,M (2172) Sao Paulo 2006 1-0 (48)}) (6... Bg4 7. Qb3 Bxf3 8. Qxf3
Bf6 9. Be3 Qd7 10. Qd1 g6 11. Nc3 Nge7 12. O-O h5 13. Qf3 Ng8 14. e5 dxe5 15.
d5 Nd8 16. Bb5 c6 17. dxc6 bxc6 18. Rfd1 Qe6 19. Ne4 Be7 20. Bc5 Rb8 21. Bxe7 {
Corbet,L (2248)-Lutz,K (2310) Avoine 1999 0-1 (36)}) (6... Nf6 7. Be2 $14) 7.
Nc3 Bg4 (7... Nf6 8. O-O $16) 8. Be3 (8. h3 Bh5 9. g4 Bg6 $16) 8... a6 (8...
Nf6 $5 9. d5 Ne5 $16) 9. Qb3 Bh5 (9... Na5 10. Bxf7+ Kf8 11. Qa4 Kxf7 12. Qxa5
$16) 10. Qxb7 Na5 11. Qd5 Nxc4 12. Qxc4 Qd7 $4 {the pressure is too much,
Black crumbles} (12... Nf6 13. e5 Nd7 14. Nd5 $16) 13. Nd5 (13. Qd5 $142 {
and White has prevailed} Rb8 14. Qxh5 Rxb2 15. Qa5 $18) 13... Bd8 14. Rc1 Ra7 (
14... Ne7 15. Nf4 Bxf3 16. gxf3 $16) 15. Nf4 Bxf3 16. gxf3 Ne7 (16... Qb5 17.
Nd3 $18) 17. d5 Rb7 18. Bd4 (18. Nh5 {keeps an even firmer grip} Qb5 19. Qxb5+
Rxb5 20. Nxg7+ Kd7 $18) 18... O-O 19. Rg1 g5 20. Qc3 (20. Nd3 $5 Qb5 $18) 20...
Kh7 (20... Ng6 21. Nxg6 fxg6 22. Rg3 $16) 21. h4 Ng6 (21... gxf4 22. Rg7+ Kh8
23. Rxf7+ Kg8 24. Rg7+ Kh8 25. Rxe7+ Kg8 26. Rxd7 c6 27. Qxc6 Re8 28. Rxb7 Ba5+
29. Ke2 Re7 30. Rxe7 Bc3 31. Qc8#) 22. Nxg6 fxg6 23. hxg5 Bxg5 24. b3 $4 {
a transit from better to worse} (24. Rc2 $142 $16) 24... Bxc1 $17 25. Qxc1 Rxf3
26. Ba1 $4 {another bit of territory lost} (26. Rh1 h5 27. Qg5 Qf7 $17) 26...
Rf8 (26... Rb4 $142 {might be the shorter path} 27. Qc2 Rf4 $19) 27. Qc3 (27.
Bd4 Qe8 28. Rg4 g5 $19) 27... Qf7 28. Rg2 Rbb8 29. Rh2 (29. f3 $142 $19) 29...
Rbe8 $4 {weakening the position} (29... g5 $142 {and the scales tip in favour
of Black} 30. Qh3 Qg6 $19) 30. Rxh6+ $11 Kxh6 31. Qh3+ Kg5 32. Qg3+ Kh5 33.
Qh3+ 1/2-1/2

[Event "SapporoAutumn2023"]
[Site "?"]
[Date "2023.10.09"]
[Round "4.3"]
[White "Ito, Katsuhide"]
[Black "Nakamura	, Mitsuru"]
[Result "0-1"]
[ECO "C96"]
[WhiteElo "1164"]
[BlackElo "1388"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "70"]
[SourceVersionDate "2023.10.23"]

{[%mdl 8256] C96: Closed Ruy Lopez: Chigorin Defence: 11 d4, replies other
than 11...Qc7} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 b5 5. Bb3 Nf6 6. O-O Be7 7.
Re1 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5 11. d4 cxd4 12. cxd4 Qc7 13. Qe2 $146 (
13. Nc3 Bb7 14. a3 (14. d5 Bc8 15. Bd3 Bd7 16. Ne2 Nb7 17. Be3 Rac8 18. b4 g6
19. Ng3 Ne8 20. a4 bxa4 21. Bxa6 Qb8 22. b5 Nc7 23. Qxa4 f5 24. Bh6 Rf7 25.
Bxb7 Qxb7 26. Qa7 Qxa7 27. Rxa7 Bd8 28. Rb1 f4 {Azarov,S (2612)-Krejci,J (2458)
Czechia 2010 1-0 (42)}) 14... Rfe8 15. Bd3 Nc4 16. Qb3 exd4 17. Nxd4 d5 18. Bg5
dxe4 19. Bxc4 bxc4 20. Qc2 Qe5 21. Nf3 Qf5 22. Be3 Rad8 23. Nd2 Rc8 24. Qa4 Nd5
25. Ncxe4 Bf8 26. Ng3 Qd3 27. Ndf1 c3 {Ragozin,V-Levenfish,G Leningrad 1939
0-1 (58)}) (13. Bd3 Nc6 14. a4 Rb8 15. axb5 axb5 16. Nc3 Nxd4 17. Nxd4 exd4 18.
Nxb5 Qb6 19. Ra7 Bb7 20. Bd2 d5 21. Ba5 Qc6 22. e5 Ne4 23. b4 Rfe8 24. Nxd4 Qc3
25. Nb5 Qc6 26. Qa1 Bh4 27. Re2 Bxf2+ {Sinurat,T (2249)-Sukandar,I (2363)
Jakarta 2013 0-1 (45)}) 13... Bb7 14. Nc3 Rfe8 {White has an active position}
15. Bd2 $4 {releasing the pressure on the opponent} (15. Bg5 Rac8 16. Rac1 h6
17. Bxf6 Bxf6 $11) 15... Nc4 $4 {Black loses the upper hand} (15... b4 $142 $5
$19) 16. Nd5 (16. Rac1 exd4 17. Nxd4 g6 $11) 16... Bxd5 (16... Nxd5 17. exd5
Bxd5 18. Bc3 $15) 17. exd5 $11 Nxb2 ({Less advisable is} 17... Nxd5 18. Be4 Qb7
19. b3 $18) ({Inferior is} 17... Nxd2 18. Qxd2 Rac8 19. Rac1 $16) 18. dxe5 (18.
Rac1 Nc4 $15) 18... dxe5 $15 {White has the pair of bishops} ({Instead of} 
18... Qxc2 19. exf6 gxf6 20. Nd4 $16) 19. Bc1 (19. Bg5 Nc4 $15 (19... Nxd5 $2 {
doesn't lead to anything significant} 20. Be4 $18)) 19... Nc4 $17 20. Rb1 $2 (
20. Bg5 $142 $5 $17) 20... Rad8 $19 21. Rd1 (21. a4 $142 Nxd5 22. axb5 axb5 23.
Ng5 $19) 21... Nxd5 $4 {a weak move, ruining a winning position.} (21... e4 {
might be the shorter path} 22. Nd2 Ne3 23. Qxe3 Qxc2 24. Bb2 Rxd5 25. Bd4 $19)
22. Qe4 $4 {gives the opponent counterplay} (22. Rxd5 Rxd5 23. Qe4 g6 24. Qxd5
Rd8 $16) 22... g6 (22... Nf6 $142 {and Black can already relax} 23. Qe1 e4 $19)
23. Bb2 $4 {ruins a clearly superior position} (23. Rxd5 $142 f5 24. Rxd8 Rxd8
25. Qe2 $16) 23... Nxb2 (23... f5 {seems even better} 24. Qe1 Bb4 25. Qe2 $19)
24. Rxb2 Nc3 25. Rxd8 Rxd8 ({Not} 25... Bxd8 26. Qe3 $19) 26. Qxe5 Bd6 (26...
Qxe5 $142 {makes it even easier for Black} 27. Nxe5 Bf6 28. Nf3 Ne2+ 29. Kf1
Bxb2 30. Kxe2 $19) 27. Qe1 Qc4 (27... a5 $142 28. Bd3 Qc5 $19) 28. Ne5 $4 {
White crumbles in face of a dire situation} (28. Bb3 $142 Qc5 29. Rd2 $17)
28... Ne2+ $19 29. Kh1 (29. Kf1 {there is nothing better in the position} Bxe5
30. Bb3 Ng3+ 31. Kg1 $19) 29... Bxe5 30. Bb3 Qf4 (30... Bxb2 $6 {is not
possible} 31. Bxc4 Ng3+ 32. fxg3 bxc4 33. Qe7 Rd1+ 34. Kh2 $11) 31. g3 (31.
Bxf7+ {doesn't get the cat off the tree} Kxf7 32. g3 Qf3+ 33. Kh2 Bxb2 34. Qh1
Qxf2+ 35. Qg2 Qe3 36. Qb7+ Kg8 37. Qg2 Be5 38. h4 Bxg3+ 39. Qxg3 Qxg3+ 40. Kh1
Rd1#) 31... Qf3+ (31... Bxb2 {is a weaker possibility} 32. gxf4 Re8 33. Qd2 $14
) 32. Kh2 Bxb2 33. Bd1 (33. a3 {does not save the day} Be5 34. Bd1 Rxd1 35. a4
Rxe1 36. axb5 Qxf2#) 33... Rxd1 $1 {Deflection: f2} 34. Qxd1 (34. Qxd1 Qxf2+ {
Mate attack Decoy Deflection}) 34... Qxf2+ 35. Kh1 Nxg3# 0-1

[Event "SapporoAutumn2023"]
[Site "?"]
[Date "2023.10.09"]
[Round "4.4"]
[White "Takeuchi, Hiroshi"]
[Black "Okimura, Mikiko"]
[Result "1-0"]
[ECO "D02"]
[WhiteElo "1410"]
[BlackElo "400"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "23"]
[SourceVersionDate "2023.10.23"]

{[%mdl 8192] D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6
3 Bf4} 1. d4 d5 2. Bf4 Nf6 3. e3 e6 4. Nf3 Nc6 5. Nc3 $146 (5. Be2 Bd6 6. O-O
O-O 7. Nbd2 Ne4 8. c3 f5 9. Ne1 e5 10. dxe5 Nxe5 11. Nxe4 dxe4 12. Qd5+ Nf7 13.
Bxd6 Qxd6 14. Bc4 Qxd5 15. Bxd5 Rd8 16. Bb3 Kf8 17. f3 exf3 18. Nxf3 Ke7 19.
Bxf7 Kxf7 {Bang,A (2250)-Hoiberg,N (2285) Copenhagen 1988 1/2-1/2}) (5. Nbd2
Bd6 (5... Be7 6. h3 a6 7. a4 Bd7 8. c3 Ne4 9. Nxe4 dxe4 10. Nd2 f5 11. a5 Bf6
12. Nc4 Bc8 13. Be2 O-O 14. O-O Ne7 15. Bh2 Nd5 16. Kh1 Bd7 17. Ne5 Bxe5 18.
Bxe5 Bc6 19. Bc4 Bb5 20. Bxd5 {Kovacevic,S (2380)-Zemerov,V (2430) Harkany
1994 1-0 (57)}) 6. c3 (6. Bg3 O-O 7. c3 Ne7 8. Bd3 Ng6 9. Ne5 c5 10. O-O Qc7
11. f4 Ne8 12. Qh5 f5 13. Nxg6 Qf7 14. Qe2 Qxg6 15. Bh4 Nf6 16. Bxf6 Qxf6 17.
Nf3 c4 18. Bc2 Bd7 19. b3 Rfc8 20. Qd2 b5 {Varga,P (2315)-Berenyi,G (2240)
Hungary 1993 1/2-1/2 (40)}) 6... Nd7 7. Bxd6 cxd6 8. e4 dxe4 9. Nxe4 Nf6 10.
Bd3 O-O 11. O-O e5 12. dxe5 dxe5 13. Qc2 g6 14. Rfe1 Bg4 15. Nxf6+ Qxf6 16. Be4
Rfe8 17. Re3 Qd6 18. Rae1 Bxf3 19. Bxf3 Rad8 {Bogdanovski,V (2459)-Sipila,V 
(2463) Warsaw 2013 1/2-1/2 (40)}) 5... b6 6. Be2 (6. Ne5 Bd7 $14) 6... Bb7 7.
O-O Be7 8. h3 {Controls g4} O-O 9. Ne5 Bb4 (9... Nxe5 10. dxe5 Ne4 11. Nxe4
dxe4 12. Qc1 $11) 10. Bd3 Nh5 $4 (10... Nxe5 $142 {is just about the only
chance} 11. Bxe5 c5 $11) 11. Qxh5 $18 Rb8 (11... g6 {there is nothing else
anyway} 12. Qg4 Be7 $18) 12. Qxh7# 1-0

[Event "SapporoAutumn2023"]
[Site "?"]
[Date "2023.10.09"]
[Round "5.1"]
[White "Yoshii, Yukihiko"]
[Black "Kawamura, Takuto"]
[Result "1-0"]
[ECO "A38"]
[WhiteElo "1685"]
[BlackElo "1595"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "157"]
[SourceVersionDate "2023.10.23"]

{[%mdl 8256] A38: Symmetrical English vs ...g6: 4 Bg2 Bg7 5 Nf3 Nf6} 1. c4 c5
2. Nc3 Nf6 3. g3 g6 4. Bg2 Bg7 5. Nf3 Nc6 6. e4 (6. d3 O-O 7. Be3 d6 8. Qc1 Re8
9. Bh6 Bh8 10. a3 a6 11. Rb1 Bd7 12. b4 cxb4 13. axb4 b5 14. cxb5 axb5 15. O-O
Qb8 16. Bd2 Rc8 17. Qd1 Ra3 18. Rb3 Ra7 19. Rb1 Bg7 20. h3 h6 {Ree,H (2450)
-Arkhipov,S (2485) Lippstadt 1992 0-1 (37)}) 6... e5 $146 (6... d6 7. d3 (7.
O-O Bg4 8. h3 Bxf3 9. Bxf3 O-O 10. d3 Nd7 11. Bg2 a6 12. Rb1 {1/2-1/2 (12)
Orso,M (2390)-Petran,P (2425) Balatonbereny 1997}) 7... O-O 8. h3 a6 9. Rb1 Rb8
10. O-O Ne8 11. Be3 Nc7 12. Qd2 Ne6 13. Ne2 Bd7 14. b3 Qc7 15. Nh2 Ned4 16. f4
Nxe2+ 17. Qxe2 Nd4 18. Qd2 b5 19. g4 f5 20. exf5 gxf5 21. g5 {Kelchner,H (2155)
-Moret,V (2190) Germany 1998 1-0 (69)}) (6... O-O 7. O-O e5 8. d3 d6 9. h3 h6
10. Be3 Kh7 11. Qd2 a6 12. Nh2 Rb8 13. g4 g5 14. Rfe1 Ne7 15. Nf1 Ng6 16. Ng3
b5 17. Nf5 b4 18. Ne2 Ne8 19. Neg3 Nf4 20. f3 Bf6 21. Bf2 {Kracik,T (2161)
-Krejci,J (2205) Nachod 2012 1/2-1/2 (79)}) (6... O-O 7. d3 $11) 7. d3 d6 8.
Bg5 Qa5 9. O-O Be6 (9... Bg4 10. h3 Bxf3 11. Bxf3 $14) 10. a3 {Controls b4} a6
{Secures b5} 11. h3 O-O 12. Nd5 Bxd5 13. cxd5 Na7 14. a4 b5 15. Qc2 Rfb8 16.
Bd2 Qc7 17. Rfc1 (17. b4 Nd7 $16) 17... bxa4 18. Rxa4 Qb7 19. Bc3 (19. h4 Nb5
$16) 19... Nb5 20. Ra2 (20. Be1 Nd7 $14) 20... Nxc3 21. Qxc3 (21. bxc3 Bh6 22.
Rca1 Qc8 $14) 21... Qb3 {Black threatens to win material: Qb3xa2} (21... Nxd5
$5 {is worth looking at} 22. exd5 e4 $17) 22. Rca1 $11 Qxc3 23. bxc3 {Black
has a new passed pawn: a6.} Rb6 (23... c4 $5 $11 {should not be overlooked})
24. Nd2 $16 Bf8 25. Ra3 Rb2 26. Nc4 Rbb8 27. Rxa6 Rxa6 28. Rxa6 Ne8 29. Rb6
Rxb6 30. Nxb6 Kg7 31. h4 Kf6 32. Bh3 Ke7 33. f3 Nc7 34. c4 (34. Bd7 Na8 35.
Nxa8 Kxd7 36. Nb6+ Kc7 $16) 34... Kd8 (34... Na6 35. Kf2 $14) 35. Kf2 (35. Nd7
Bh6 $16) 35... Be7 (35... Na6 36. Ke3 $14) 36. Ke2 Ne8 (36... Na6 $16) 37. Nd7
(37. Nc8 Bf6 $16) 37... Nf6 (37... Kc7 $142 $5 $11 {and Black has air to breath
}) 38. Nb8 $16 Nh5 39. Kf2 Bf6 40. Nc6+ Kc7 41. Bg4 Ng7 42. Ke3 h5 43. Bh3 Kb6
44. f4 Kc7 45. Kf3 Ne8 46. f5 (46. fxe5 Bxe5 47. Nxe5 dxe5 $16) 46... g5 47.
hxg5 Bxg5 {White has a new backward pawn: g3} 48. Bf1 Ng7 (48... Kb6 49. Be2
$14) 49. Be2 Bf6 50. Kg2 Bg5 51. Kh3 Bf6 52. Bd1 Bg5 $2 (52... Kb6 53. Bf3 $16)
53. Ba4 (53. Bxh5 $142 {and White is on the road to success} f6 54. Bd1 $18)
53... Bf6 54. Na5 Kb6 55. Nb3 Bg5 56. Bc6 Kc7 57. Na1 Kd8 58. Nc2 Kc7 59. Ne1
Bf6 60. Nf3 Be7 61. g4 h4 $4 {cause more grief} (61... hxg4+ $142 62. Kxg4 Kb6
$16) 62. g5 $18 Nh5 (62... f6 {otherwise it's curtains at once} 63. g6 Bf8 64.
Kxh4 Kd8 $18) 63. Kxh4 Nf4 64. Ne1 (64. f6 $142 $5 {makes it even easier for
White} Kd8 65. fxe7+ Kxe7 $18) 64... Bf8 (64... f6 65. g6 Bf8 $18) 65. Be8 Kb6
(65... f6 {praying for a miracle} 66. gxf6 Kd8 $18) 66. Bxf7 Ka5 (66... Bg7 {
is no salvation} 67. f6 Bh8 68. Kg4 $18) 67. g6 (67. f6 $142 {and White wins}
Kb4 $18) 67... Bg7 68. Kg5 Nh3+ 69. Kg4 Nf4 (69... Ng1 {does not solve anything
} 70. Nc2 Kb6 71. Ne3 $18) 70. Nc2 (70. Nf3 $142 {nails it down} Nxd3 71. Ng5
Bh8 $18) 70... Ka4 (70... Kb6 {cannot change what is in store for White} 71.
Na3 Kc7 $18) 71. Ne1 Kb3 $4 {simply marches past the door to victory} (71...
Ka5 72. Nf3 Nxd3 $18) 72. Nf3 $18 Kc3 73. Ng5 Kxd3 74. Ne6 Bf6 75. g7 Bxg7 76.
Nxg7 Kxc4 77. Ne8 Kb3 78. Nxd6 c4 79. Nxc4 $1 {puts the final touch} (79. Nxc4
Kxc4 80. d6+ Kc3 81. d7 Ne2 82. d8=Q Kc2 83. Kf3 Nc3 84. Qd6 Na4 85. Qb4 Nb6
86. Qxb6 Kd3 87. Qc5 Kd2 88. Bb3 Kd3 89. Qe3#) 1-0

[Event "SapporoAutumn2023"]
[Site "?"]
[Date "2023.10.09"]
[Round "5.2"]
[White "Ishii, Hibiki"]
[Black "Takeuchi, Hiroshi"]
[Result "1-0"]
[ECO "B07"]
[WhiteElo "1365"]
[BlackElo "1410"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "69"]
[SourceVersionDate "2023.10.23"]

{[%mdl 8192] B07: Pirc Defence: Miscellaneous Systems} 1. e4 d6 2. d4 Nf6 3.
Nc3 g6 4. Bg5 Bg7 5. Be2 (5. Qe2 c6 6. O-O-O O-O 7. e5 dxe5 8. dxe5 Nd5 9. Nxd5
cxd5 10. f4 Nc6 11. Qd2 Be6 12. Nf3 Qb6 13. Bh4 Rac8 14. Bf2 Qb4 15. a3 Qa4 16.
Bd3 b5 17. Kb1 Bh6 18. Qe2 Rb8 19. c3 d4 {Tolnai,T (2550)-Zimmerman,Y (2410)
Hungary 1997 1-0 (58)}) 5... O-O 6. Qd2 e5 $146 (6... Nc6 7. Nf3 (7. O-O-O e5
8. dxe5 dxe5 9. Qxd8 Nxd8 10. Nd5 Nxe4 11. Nxc7 Nxg5 12. Nxa8 Ne4 13. Rf1 Ne6
14. f3 Bh6+ 15. Kd1 Rd8+ 16. Bd3 N4c5 17. Ne2 Bd7 18. b4 Nxd3 19. cxd3 Rxa8 20.
Kc2 Bb5 21. Nc3 Nd4+ {Serdjukov,S (2165)-Chekhov,S (2281) Voronezh 2008 0-1})
7... Bg4 8. Ng1 Bxe2 9. Ngxe2 a6 10. O-O-O b5 11. Qf4 Nd7 12. Qh4 f6 13. Bh6 e5
14. Nd5 Ne7 15. Bxg7 Kxg7 16. dxe5 Nxd5 17. Nd4 Nc5 18. exd6 Nb4 19. a3 Na2+
20. Kb1 Nc3+ 21. bxc3 {Charneira,H (2245)-Oliveira,A (2290) Lisbon 1992 0-1 
(42)}) (6... c6 7. O-O-O b5 8. e5 dxe5 9. dxe5 Qxd2+ 10. Rxd2 b4 11. exf6 bxc3
12. bxc3 exf6 13. Be3 Be6 14. Nf3 Nd7 15. Rd6 Ne5 16. Nxe5 fxe5 17. Rxc6 Bxa2
18. c4 Rab8 19. Rd1 e4 20. Kd2 Rb2 21. Bxa7 {Karagodin,V (2272)-Zdebskaja,N 
(2331) Maikop 2004 0-1 (57)}) (6... Nc6 7. Nf3 $14) 7. d5 {Black has a cramped
position} (7. dxe5 $142 $5 dxe5 8. Qxd8 Rxd8 9. Nd5 $16) 7... Nbd7 $11 8. h4 h5
(8... Nc5 9. Qe3 $11) 9. f3 {Black's piece can't move: c8} Qe8 10. g4 Kh7 $2 (
10... Nc5 $142 $11 {would keep Black alive}) 11. Nb5 $16 Qd8 12. gxh5 gxh5 13.
Nh3 a6 14. Nc3 Rh8 15. f4 Kg8 (15... b5 16. f5 $18) 16. O-O-O Qe8 17. Rdg1 Kf8
18. Rg3 (18. Nf2 Nc5 $18) 18... Nc5 (18... Ng4 19. Rf1 $18) 19. Bxf6 (19. Nf2
$142 $5 $18) 19... Bxf6 $16 20. Ng5 exf4 21. Rg2 Be5 22. Rhg1 (22. Nf3 Rg8 23.
Rxg8+ Kxg8 24. Rg1+ Kf8 25. Nxe5 Qxe5 $16) 22... f6 {Black threatens to win
material: f6xg5} (22... Na4 23. Nd1 $11) 23. Nf3 Bg4 (23... Bh3 24. Rg7 Bg4 25.
Nxe5 Qxe5 26. Bxg4 hxg4 (26... Kxg7 27. Be6+ Kf8 28. Qg2 Nxe6 29. dxe6 Qxe6 30.
Qg7+ Ke8 31. Qxh8+ Kd7 32. Rg7+ Kc6 33. Qxa8 f3 34. Qd8 Kc5 35. Kd2 Kd4 36. Re7
f2 37. Ne2+ Kxe4 38. Rxe6+ Kd5 39. Nc3+ Kc6 40. Re7 f1=N+ 41. Kd3 Kc5 42. Qxc7+
Kb4 43. Re4#) 27. R7xg4 Re8 $18) 24. Nxe5 $16 Qxe5 (24... fxe5 $5 25. Bxg4 hxg4
26. Rxg4 Qf7 $16) 25. Bxg4 $18 hxg4 26. Rxg4 Nxe4 (26... a5 27. Rxf4 Rg8 28.
Rgf1 $18) 27. Nxe4 Qxe4 28. Rxf4 Qe7 29. Rgf1 Rh6 30. Qf2 (30. Re4 $142 Qh7 31.
Qb4 $18) 30... Kf7 $4 {causes further problems for White} (30... Re8 $142 $16)
31. Re1 $18 Qd8 (31... Qf8 32. Rc4 Rc8 33. Qf5 $18) 32. Rfe4 (32. Rg4 Qh8 33.
Qf5 $18) 32... Qf8 (32... Rh5 33. Rf1 Rxd5 34. Rf4 $18) 33. Re7+ (33. Qg2 {
seems even better} Rh5 34. Re7+ Qxe7 35. Rxe7+ Kxe7 36. Qg7+ Ke8 37. Qg6+ Kf8
38. Qxf6+ Ke8 39. Qg6+ Kf8 40. Qxh5 Kg7 41. Qg5+ Kh8 42. Qh6+ Kg8 43. Qg6+ Kh8
$18) 33... Qxe7 (33... Kg8 $18 {is one last hope}) 34. Rxe7+ Kxe7 35. Qe3+ (35.
Qe3+ Kf7 36. Qxh6 $18) 1-0

[Event "SapporoAutumn2023"]
[Site "?"]
[Date "2023.10.09"]
[Round "5.3"]
[White "Yamada, Akihiro"]
[Black "Okimura, Mikiko"]
[Result "1-0"]
[ECO "B12"]
[WhiteElo "1966"]
[BlackElo "400"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "57"]
[SourceVersionDate "2023.10.23"]

{[%mdl 8256] B12: Caro-Kann: Advance Variation} 1. e4 c6 2. d4 d5 3. e5 Bf5 4.
h4 e6 (4... c5 5. dxc5 Nc6 6. Bb5 Qa5+ 7. Nc3 O-O-O 8. Bxc6 bxc6 9. Qd4 e6 10.
Be3 h5 11. O-O-O Nh6 12. f3 f6 13. exf6 gxf6 14. Qxf6 Rh7 15. Nge2 Bg7 16. Qg5
Nf7 17. Qg3 e5 18. Kb1 d4 19. Bg5 {Nunn,J (2615)-Lobron,E (2505) Wijk aan Zee
1985 1-0}) 5. g4 $146 (5. Bd3 Bxd3 6. Qxd3 h5 7. Bg5 Be7 8. Nf3 Qa5+ 9. Nbd2
Qa6 10. Qxa6 Nxa6 11. c4 f6 12. Bf4 Bb4 13. Rc1 Ne7 14. a3 Bxd2+ 15. Kxd2 dxc4
16. Rxc4 Nd5 17. Bg3 f5 18. Ng5 Ke7 19. Rd1 Rhd8 {Kumaran,B (2316)-Nguyen,V 
(2445) Chennai 2014 0-1 (58)}) 5... Be4 6. f3 Bg6 7. h5 Bxc2 (7... Bxh5 8. Rxh5
Be7 9. Be3 $18) 8. Qxc2 Bb4+ 9. Nc3 Ne7 (9... c5 {does not win a prize} 10.
dxc5 Nd7 11. Bb5 $18) 10. Be3 (10. h6 {makes it even easier for White} g6 $18)
10... Na6 (10... Qa5 {doesn't change the outcome of the game} 11. h6 gxh6 12.
a3 $18) 11. Bd3 Nc7 (11... c5 {doesn't improve anything} 12. Nge2 $18 (12. Bxh7
$6 cxd4 13. Bxd4 Nc6 $18)) 12. Bxh7 (12. Nge2 {might be the shorter path} Nc8
$18) 12... Rf8 (12... c5 {a fruitless try to alter the course of the game} 13.
Nge2 Nc6 14. dxc5 $18) 13. Nge2 Qd7 (13... Nb5 {cannot undo what has already
been done} 14. Bd3 $18) 14. h6 (14. O-O-O $142 $18 {keeps an even firmer grip})
14... f5 (14... g6 {is the last straw} 15. Bg5 Rh8 $18) 15. hxg7 Rf7 (15... Rg8
{doesn't get the bull off the ice} 16. Bxg8 Nxg8 17. gxf5 exf5 18. Rh7 $18) 16.
Bg6 $1 {Decoy: g6} Nxg6 (16... Nxg6 17. Rh8+ {Double attack} (17. g8=Q+ {
Promotion Decoy})) (16... Z0 $140 17. Rh8+ {Mate threat}) 17. g8=Q+ Rf8 18.
Qxg6+ Qf7 19. Qxf7+ Rxf7 20. Rh8+ (20. gxf5 {and White can already relax} O-O-O
21. f6 Kb8 $18) 20... Rf8 21. Rxf8+ Kxf8 22. gxf5 Ke7 23. Bg5+ Kd7 24. fxe6+
Nxe6 25. Qh7+ Kc8 26. Qg8+ Bf8 27. Qxe6+ Kc7 (27... Kb8 {doesn't change
anything anymore} 28. Qe8+ Kc7 29. Qxa8 Be7 30. Bxe7 Kb6 31. Bd8+ Ka6 32. b4 b6
33. Qc8#) 28. Nxd5+ $1 {Decoy: b8} Kb8 (28... cxd5 29. Rc1+ {Mate attack Decoy}
) 29. Qe8# 1-0

[Event "SapporoAutumn2023"]
[Site "?"]
[Date "2023.10.09"]
[Round "5.4"]
[White "Ito, Katsuhide"]
[Black "Nishimori, Toshiyuki"]
[Result "1-0"]
[ECO "B33"]
[WhiteElo "1164"]
[BlackElo "1604"]
[Annotator "Fritz 11 SE (30s)"]
[PlyCount "95"]
[SourceVersionDate "2023.10.23"]

{[%mdl 8192] B33: Sicilian: Pelikan and Sveshnikov Variations} 1. e4 c5 2. Nf3
Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Bxf6
gxf6 10. Nd5 f5 11. Bd3 Be6 12. O-O Bg7 13. Qh5 f4 14. g3 (14. Nb1 O-O 15. a4
b4 16. Nd2 f5 17. Bc4 Na5 18. b3 Nxc4 19. bxc4 Rc8 20. Rab1 a5 21. exf5 Bxf5
22. Rbc1 Bd7 23. c3 b3 24. Rb1 Bxa4 25. Nxb3 Be8 26. Qg4 Bd7 27. Qf3 Qg5 28.
Nd2 Bg4 {Ivanovic,B (2460)-Sveshnikov,E (2545) Sochi 1979 1/2-1/2 (44)}) (14.
c3 Ne7 15. Nxe7 Qxe7 16. Nc2 O-O 17. g3 Qf6 18. Nb4 Qg6 19. Qxg6 fxg6 20. a4 a5
21. Nc6 bxa4 22. Rxa4 Bd7 23. Bb5 Rab8 24. c4 Bxc6 25. Bxc6 Rxb2 26. Rxa5 Bh6
27. c5 fxg3 28. hxg3 Bd2 {Baker,C (2347)-Maung,M (2367) Bangkok 2002 0-1 (40)})
14... fxg3 $146 (14... Bxd5 15. exd5 Ne7 16. c4 bxc4 17. Nxc4 Ng6 18. Rac1 O-O
19. Nd2 Bf6 20. Rc6 a5 21. h4 Kh8 22. Qf5 Bxh4 23. gxh4 Rg8 24. Kh2 Qxh4+ 25.
Qh3 Qe7 26. Ne4 f5 27. Nxd6 e4 28. Bxe4 fxe4 29. Qc3+ {Arakhamia Grant,K (2420)
-Manakova,M (2330) Elista 1998 1-0 (37)}) (14... Ne7 15. Rad1 Bxd5 16. exd5 Ng6
17. c3 O-O 18. Nb1 Rc8 19. Nd2 a5 20. Kh1 b4 21. c4 Re8 22. b3 Qe7 23. Ne4 h6
24. Rg1 Kh8 25. Qf5 Rcd8 26. Rde1 Qd7 27. Nxd6 Qxd6 28. Qxf7 e4 29. Bxe4 {
Grabher,H (2285)-Hoellrigl,W (2215) Graz 1998 1-0 (42)}) (14... Bf6 15. c4 b4
16. Nc2 Rg8 17. Qe2 a5 18. b3 Kf8 19. Nxf6 Qxf6 20. a3 bxa3 21. Rxa3 Rb8 22.
Qd2 f3 23. Rd1 Rd8 24. Ne3 Rg5 25. Bf1 Rh5 26. Nd5 Bxd5 27. cxd5 Nd4 28. Qxa5
Rc8 29. Rxd4 {Lehto,V (2305)-Nokso Koivisto,A (2380) Helsinki 1990 0-1 (37)}) (
14... Ne7 15. c4 $14) 15. fxg3 (15. hxg3 O-O $14) 15... Ra7 (15... O-O $5 $14)
16. c4 $16 b4 17. Nc2 a5 18. b3 (18. Nce3 O-O $16) 18... Ne7 (18... h6 19. a3
bxa3 20. Nxa3 $14) 19. Nf6+ Bxf6 20. Rxf6 Ng6 21. Raf1 Qe7 (21... Qb6+ 22. Kh1
$16) 22. Ne3 (22. Qh6 $16) 22... Qc7 $2 (22... Nf4 $142 $1 {and Black hangs on}
23. R6xf4 exf4 24. Qb5+ Kf8 25. Rxf4 Ra8 $14) 23. Nf5 $18 Kd8 24. Nh6 (24. Ng7
$5 Qc5+ 25. Kh1 Bc8 $18) 24... Qc5+ 25. Kg2 Re7 (25... Rf8 $5 $16) 26. Nxf7+
$18 Bxf7 27. Rxf7 Qe3 28. Qe2 $4 {White threatens to win material: Qe2xe3.
White lets it slip away} (28. R7f3 Qd4 $18) 28... Qg5 $2 (28... Nf4+ 29. R1xf4
Qxe2+ 30. Bxe2 exf4 31. Rxf4 $11) 29. Qf2 $4 {letting the wind out of his own
sails} (29. Rxe7 $5 Kxe7 30. Qf2 Nf4+ 31. Kh1 Nxd3 32. Qa7+ Ke8 33. Qa8+ Qd8
$18) 29... Nf4+ (29... Rxf7 $142 $5 {and Black can hope to live} 30. Qxf7 Qd2+
31. Qf2 Qxd3 32. Qb6+ Kc8 33. Qc6+ Kb8 34. Qb6+ Kc8 35. Qc6+ Kb8 36. Qb6+ Kc8
$11) 30. Rxf4 $16 exf4 31. Qb6+ (31. Qxf4 $6 Qxf4 32. Rxf4 Kc7 $14) 31... Rc7
$4 {terrible, but the game is lost in any case} (31... Kd7 $142 32. e5 f3+ (
32... dxe5 $4 33. Rd1 Ke8 34. Qb8+ Kf7 35. Qxh8 $18) 33. Rxf3 Qd2+ 34. Rf2 Qxd3
35. Qb7+ Kd8 36. Qb8+ Kd7 37. Qxh8 Qe4+ 38. Kh3 Qxe5 $16) 32. Qxd6+ (32. Qb8+ {
and White can already relax} Kd7 33. Qxh8 Qe5 $18) 32... Rd7 (32... Kc8 {
cannot change destiny} 33. e5 Re8 34. Qa6+ Kd7 $18) 33. Qxf4 (33. Qb8+ $142 {
might be the shorter path} Ke7 34. Qxh8 Rxd3 35. Qxh7+ Ke6 36. Rxf4 $18) 33...
Qc5 (33... Qxf4 $142 {ends the debate} 34. Rxf4 Rxd3 $19) 34. Qf6+ $18 Kc7 35.
Qxh8 Rxd3 (35... Kb7 {cannot change what is in store for White} 36. Rf5 Qc7 37.
Rd5 Rxd5 38. exd5 $18) 36. Rf7+ Kc6 37. Qe8+ Kb6 38. Rf6+ (38. Qb8+ Kc6 39.
Qc7#) 38... Kb7 39. Qf7+ Kb8 40. Qg8+ Kb7 41. Qxh7+ (41. Rf7+ $142 {and White
has reached his goal} Qc7 42. Qxh7 Qxf7 43. Qxf7+ Kc6 $18) 41... Kb8 42. Rg6 (
42. Qg8+ Kc7 43. Rf7+ Rd7 44. Rxd7+ Kxd7 45. Qd5+ Qd6 46. c5 Qxd5 47. exd5 Kd8
48. Kf3 Kd7 49. c6+ Ke8 50. h4 Kd8 51. h5 a4 52. d6 axb3 53. axb3 Ke8 54. Kg2
Kd8 55. h6 Ke8 56. c7 Kf7 57. d7 Kg6 58. c8=Q Kf6 59. d8=Q+ Kg6 60. Qf8 Kh7 61.
Qcf5#) 42... Rd2+ 43. Kh3 Qc8+ (43... Rd8 {does not solve anything} 44. Rh6 $18
) 44. g4 Rd3+ 45. Kh4 Qd8+ (45... Rd8 {doesn't change anything anymore} 46. Qe7
Qc7 47. Qxc7+ Kxc7 48. Ra6 $18) 46. Rg5 (46. g5 {seems even better} Rd2 47. h3
Rd7 $18) 46... Rd7 (46... Rd2 {the only chance to get some counterplay} 47. h3
Rxa2 $18) 47. Qg8 Kc7 (47... a4 {hardly improves anything} 48. Qxd8+ Rxd8 49.
Rd5 $18) 48. Qxd8+ (48. Qxd8+ Rxd8 49. Rxa5 $18) 1-0

