[Event "SapporoAutumn2017"]
[Site "?"]
[Date "2017.10.08"]
[Round "1.1"]
[White "Kanamaru, Tomoji"]
[Black "Sugimoto, Koichi"]
[Result "0-1"]
[ECO "B01"]
[WhiteElo "1647"]
[BlackElo "1999"]
[Annotator "Fritz 15 (30s)"]
[PlyCount "44"]

{B01: Scandinavian Defence} 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6 4. d3 Nf6 5. Nf3
Bf5 (5... c6 6. g3 Bg4 7. h3 Bxf3 8. Qxf3 Nbd7 9. Bg2 e6 10. O-O Qc7 11. b3 Bd6
12. Bb2 O-O 13. Rad1 Rad8 14. Rfe1 Rfe8 15. d4 Nf8 16. Ne4 Be7 17. c4 Nxe4 18.
Qxe4 Bf6 19. Re2 Re7 20. Red2 {Kubecka,D (2218)-Kolbus,D (2302) Marianske
Lazne 2013 1/2-1/2 (53)}) 6. Be2 Nc6 7. O-O $146 (7. Bg5 O-O-O 8. Nd2 Nd4 9.
Nc4 Qc6 10. O-O Nd5 11. Be3 Nxe2+ 12. Qxe2 f6 13. Nxd5 Rxd5 14. Bxa7 b6 15. a4
Kb7 16. a5 b5 17. Be3 bxc4 18. dxc4 Rd7 19. b4 e6 20. c5 Kb8 21. Rfb1 Be7 {
Sejkora,V (2325)-Jirovsky,M (2480) Czechia 2002 1-0 (40)}) 7... e5 8. h3 {
Covers g4} Be7 {White has a cramped position} 9. Be3 {Black has a very active
position} O-O 10. d4 (10. Nd2 Rad8 $11) 10... exd4 {Black forks: c3+e3.} 11.
Nb5 Qd7 12. Nbxd4 Be4 13. Bb5 Bd6 14. Ba4 a6 {Secures b5} 15. Nxc6 Bxc6 16.
Bxc6 {White forks: d7+b7} Qxc6 17. c3 {Consolidates b4} Rad8 18. Qc2 Ne4 19.
Rfe1 Rde8 20. Rad1 h6 {Controls g5} 21. Bd4 Bf4 22. Ne5 $4 {throwing away the
advantage} (22. b4 $142 $11 {would keep White in the game}) 22... Bxe5 $19 (
22... Bxe5 23. Rxe4 Qxe4 24. Qxe4 Bh2+ 25. Kxh2 Rxe4 $19) 0-1

[Event "SapporoAutumn2017"]
[Site "?"]
[Date "2017.10.08"]
[Round "1.2"]
[White "Yamada, Akihiro"]
[Black "Koyahata, Taku"]
[Result "1-0"]
[ECO "B00"]
[WhiteElo "1956"]
[BlackElo "1375"]
[Annotator "Fritz 15 (30s)"]
[PlyCount "43"]

{B00: Queen's Fianchetto Defence, Nimzowitsch Defence} 1. Nf3 Nc6 2. e4 Nf6 3.
e5 Nd5 4. d4 (4. c4 Nb6 5. c5 Nd5 6. Bc4 e6 7. d4 b6 8. Bxd5 exd5 9. Bg5 Be7
10. Bxe7 Nxe7 11. cxb6 axb6 12. O-O O-O 13. Nc3 d6 14. h3 dxe5 15. Nxe5 f6 16.
Nd3 c6 {1/2-1/2 (16) Sax,G (2528)-Rogulj,B (2389) Bizovac 2007}) (4. Bb5 a6 5.
Ba4 d6 6. Qe2 e6 7. c4 Nb6 8. Bxc6+ bxc6 9. b3 Be7 10. Bb2 O-O 11. O-O a5 12.
a4 Nd7 13. d3 c5 14. Nbd2 Bb7 15. Rab1 Ra6 16. Ne4 Qa8 17. Bc3 dxe5 18. Nxe5
Nxe5 {Yankovsky,R (2455)-Peters,J (2351) Ontario 2013 0-1 (40)}) 4... e6 5. Bd3
Be7 $146 (5... Ndb4 6. Be2 d5 7. c3 Na6 8. Bd3 Be7 9. h4 h6 10. h5 b6 11. Be3
Ncb8 12. b4 c5 13. a3 Nd7 14. O-O Nc7 15. Ne1 c4 16. Bc2 f5 17. exf6 gxf6 18.
Qg4 Bf8 19. Nf3 Qe7 20. Nh4 {Kindermann,S (2535)-Stokstad,P (2180) Skei 1994
1-0}) 6. O-O O-O {Black has a cramped position. Black's piece can't move: c8}
7. c4 {White threatens to win material: c4xd5} Nb6 8. Nc3 d5 9. exd6 cxd6 10.
Be3 a6 {Prevents intrusion on b5} (10... f5 11. Re1 $14) 11. Qe2 Nd7 12. Rad1
Nf6 13. Rfe1 Nb4 14. Bb1 d5 {Black has a cramped position} 15. a3 {White
threatens to win material: a3xb4} Nc6 16. Bf4 Re8 17. Ne5 (17. Bg5 $142 $16)
17... Nxe5 $4 (17... dxc4 $142 {was necessary} 18. Qxc4 Qb6 $16) 18. dxe5 $18
Nd7 19. cxd5 exd5 (19... Bc5 {hardly improves anything} 20. dxe6 Rxe6 21. Bf5
$18) 20. Nxd5 (20. e6 $142 {and White can already relax} fxe6 21. Qxe6+ Kh8 22.
Qxd5 $18) 20... Bf8 (20... Nf8 $18) 21. Qc2 Qa5 (21... g6 {hoping against hope}
22. Nc7 Kh8 23. Nxa8 Re6 $18) 22. Qxh7# 1-0

[Event "SapporoAutumn2017"]
[Site "?"]
[Date "2017.10.08"]
[Round "1.3"]
[White "Ito, Katsuhide"]
[Black "Yoshii, Yukihiko"]
[Result "0-1"]
[ECO "C96"]
[WhiteElo "1338"]
[BlackElo "1883"]
[Annotator "Fritz 15 (30s)"]
[PlyCount "56"]

{C96: Closed Ruy Lopez: Chigorin Defence: 11 d4, replies other than 11...Qc7} 
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3
O-O 9. h3 Na5 10. Bc2 c5 11. d4 cxd4 12. cxd4 Qc7 13. b3 (13. Nc3 Bb7 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 {Azarov,S (2612)-Krejci,J (2458) Czechia 2010 1-0 (42)}) (13. Bd3 Bd7 14.
b3 Nc6 15. Bb2 Rfe8 16. a3 Bd8 17. Nbd2 Qb7 18. d5 Ne7 19. a4 Ng6 20. Ba3 Nf4
21. Bf1 Bb6 22. a5 Bc7 23. Bb4 Rac8 24. Nh2 Qa7 25. Ndf3 Bb8 26. Ra2 Red8 27.
Kh1 Qc7 {Cheparinov,I (2678)-Rydstrom,T (2172) Helsingor 2013 1-0 (75)}) 13...
Bb7 $146 (13... Nc6 14. Bb2 (14. Nbd2 Nb4 15. Bb1 Bb7 16. Bb2 Nd7 17. d5 a5 18.
Qe2 Qb6 19. a3 Na6 20. Bd3 Nc7 21. g4 Nc5 22. Bc2 Ba6 23. b4 axb4 24. axb4 Na4
25. Bc1 Bc8 26. Ra3 Bd7 27. Nf1 Na6 28. Rb3 Rac8 {Kislik,E (2349)-Farago,S 
(2249) Budapest 2009 1-0 (60)}) 14... Bb7 (14... exd4 15. Nxd4 Nxd4 16. Bxd4
Bb7 17. Nd2 Rac8 18. Bd3 Nd7 19. Nf1 Ne5 20. Ne3 Bf6 21. Nd5 Bxd5 22. exd5 Qb7
23. Bxe5 Bxe5 24. Rb1 Rc5 25. Be4 Rfc8 26. Bf5 Rd8 27. Be4 g6 28. Rc1 Rxc1 29.
Qxc1 {Pecha,T (2176)-Krejci,J (2357) Sec u Chrudimi 2008 0-1 (42)}) 15. Nc3
Nxd4 16. Nxd4 exd4 17. Qxd4 Qc5 18. Qd3 Rfe8 19. Rad1 Bf8 20. Bb1 Qh5 21. f3
Qh4 22. Ne2 Nd7 23. Bd4 Ne5 24. Qd2 Re6 25. Qf4 Qxf4 26. Nxf4 Ree8 27. Nd5 Bxd5
28. exd5 {Kvon,A (2354)-Alaguzov,M (2174) Bishkek 2006 1/2-1/2 (42)}) 14. Nbd2
$4 {White lets it slip away} (14. Bb2 $5 $11 {should be examined more closely})
14... Rac8 (14... Rfc8 15. b4 Qxc2 16. bxa5 Qxd1 17. Rxd1 Nxe4 18. Nxe4 Bxe4
19. dxe5 Bxf3 20. gxf3 dxe5 21. Rd7 $19) 15. Bd3 $2 (15. a4 $142 $5 {and White
could well hope to play on} Qxc2 16. Qxc2 Rxc2 17. axb5 Nxe4 18. bxa6 Nxd2 19.
Nxd2 Bxa6 20. Rxa5 $15) 15... Qc3 $19 16. Nc4 $2 (16. Ba3 Qxd3 17. dxe5 Nd7 $19
) 16... Nxc4 (16... bxc4 $142 {seems even better} 17. Bd2 Qxd3 $19) 17. Bg5 $4
{White crumbles in face of a dire situation} (17. Rb1 Nb6 18. a4 $19) 17... Nb2
18. Qe2 (18. Qb1 {is not much help} Nxd3 19. Re3 Qxa1 20. Qxa1 Rc1+ 21. Qxc1
Nxc1 22. dxe5 dxe5 23. Nxe5 Re8 $19) 18... Nxd3 19. Bd2 (19. Red1 {doesn't get
the cat off the tree} Nf4 20. Bxf4 exf4 $19) 19... Qc2 20. Rec1 (20. Rf1 {
is not the saving move} Nxe4 21. dxe5 dxe5 $19) 20... Nxc1 21. Rxc1 Qxe4 (21...
Qxa2 $142 {keeps an even firmer grip} 22. Qd1 Rxc1 23. Bxc1 Nxe4 24. Bd2 $19)
22. Qf1 Rxc1 23. Qxc1 Rc8 24. Qb2 Rc2 25. Qa3 Rxd2 $1 {Deflection: f3} 26. dxe5
(26. Nxd2 Qxg2# {Mate attack Deflection Pinning}) (26. -- $140 Rd1+ {Mate
threat}) 26... Rd1+ 27. Kh2 Qf4+ 28. g3 Qxf3 (28... Qxf3 29. exf6 Qxf2#) 0-1

[Event "SapporoAutumn2017"]
[Site "?"]
[Date "2017.10.08"]
[Round "1.4"]
[White "Nishimori, Toshiyuki"]
[Black "Nakamura, Mitsuru"]
[Result "1-0"]
[ECO "B86"]
[WhiteElo "1767"]
[BlackElo "1000"]
[Annotator "Fritz 15 (30s)"]
[PlyCount "57"]

{B86: Sicilian Scheveningen/Najdorf: 6 Bc4, without early ...b5} 1. e4 c5 2.
Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 e6 7. Bb3 Be7 8. O-O O-O 9. h3
$146 {Secures g4} (9. a4 Nc6 (9... b6 10. Be3 Bb7 11. Bxe6 fxe6 12. Nxe6 Qc8
13. Nxf8 Bxf8 14. f3 Nbd7 15. Qd2 Qc7 16. Rad1 Ne5 17. b3 Rc8 18. Bd4 Ned7 19.
Rfe1 Be7 20. Re2 h6 21. Na2 Ne5 22. Bb2 Kh8 23. Ba3 Rd8 24. Qc3 {Michiels,B 
(2454)-Gharamian,T (2517) Charleroi 2007 1/2-1/2 (60)}) (9... Nbd7 10. Re1 Nc5
11. Qf3 Bd7 12. Bg5 Rb8 13. Qg3 Qc7 14. Bh6 Ne8 15. Bg5 Nf6 16. f4 b5 17. axb5
axb5 18. Bh6 Ne8 19. Nf5 exf5 20. Nd5 Qd8 21. Nxe7+ Qxe7 22. Bg5 Nf6 23. e5
dxe5 24. fxe5 {Harper,R (2184)-Farley,T (2247) Bridgetown 2011 1-0 (50)}) (9...
Qc7 10. f4 Nc6 11. Kh1 Nxd4 12. Qxd4 e5 13. Qd3 Be6 14. f5 Bxb3 15. cxb3 Qb6
16. Qc2 Rac8 17. Bg5 Rc6 18. Bxf6 Bxf6 19. Rad1 Rfc8 20. Rd3 Bg5 21. Qd1 f6 22.
Nd5 Qd8 23. Rc3 Kh8 24. Rf2 {Seeman,T (2355)-Vetemaa,J (2355) Jyvaskyla 1997
1-0}) 10. Be3 Bd7 (10... Re8 11. Nxc6 bxc6 12. a5 Bb7 13. f3 c5 14. Na4 Qc7 15.
Nb6 Rad8 16. c4 d5 17. cxd5 exd5 18. Nxd5 Bxd5 19. Bxd5 Nxd5 20. exd5 Bd6 21.
Re1 Bxh2+ 22. Kf1 Bg3 23. Bf2 h5 24. Qc2 Rxe1+ 25. Rxe1 {Markovic,M (2300)
-Arsovic,G (2270) Belgrade 1989 0-1}) 11. Kh1 Na5 12. f4 Qc7 13. Qf3 Rad8 14.
Rad1 Nxb3 15. cxb3 Qa5 16. Nc2 Qc7 17. Nd4 b6 18. Qg3 Kh8 19. Rde1 g6 20. Nf3
Nh5 21. Qf2 Rb8 22. Bd4+ Kg8 23. f5 Qd8 {Prasad,D (2300)-Ree,H (2510)
Bangalore 1981 0-1 (44)}) 9... Qc7 10. Be3 b5 11. a3 Bd7 12. f4 {Black has a
cramped position} Nc6 13. Qf3 e5 14. Nf5 Bxf5 15. exf5 Nd4 16. Bxd4 exd4 17.
Nd5 {White threatens to win material: Nd5xc7} Qa7 (17... Nxd5 18. Bxd5 Rae8 19.
Rfe1 $11) 18. Qd3 (18. Nxe7+ Qxe7 19. Rad1 Rae8 $16) 18... Rae8 19. Rae1 Nxd5
20. Bxd5 Qc5 {Black threatens to win material: Qc5xd5} 21. Bb3 (21. Qb3 $5 $11)
21... Bf6 22. Kh2 Re3 23. Rxe3 dxe3 24. c3 {Covers d4} Re8 (24... d5 $5 $15 {
is worth looking at}) 25. Re1 $11 d5 (25... Bd8 $5 $11 {is an interesting idea}
) 26. Qxd5 $16 Qxd5 27. Bxd5 Kf8 28. Bb7 e2 $2 (28... Rb8 $142 29. Bf3 Re8 $16)
29. Bxa6 $18 1-0

[Event "SapporoAutumn2017"]
[Site "?"]
[Date "2017.10.08"]
[Round "2.1"]
[White "Sugimoto, Koichi"]
[Black "Nishimori, Toshiyuki"]
[Result "0-1"]
[ECO "D06"]
[WhiteElo "1999"]
[BlackElo "1767"]
[Annotator "Fritz 15 (30s)"]
[PlyCount "64"]

{D06: Queen's Gambit: Symmetrical and Baltic Defences} 1. d4 Nf6 2. c4 d5 3.
cxd5 Qxd5 4. Nc3 Qd8 (4... Qh5 5. Nf3 Bg4 6. Qb3 Bc8 7. e4 Qa5 8. e5 Ne4 9. Qd5
Qxd5 10. Nxd5 Kd8 11. Bd3 Bf5 12. Ke2 e6 13. Nf4 h6 14. h4 c5 15. Rd1 Nc6 16.
d5 Nb4 17. Bb1 c4 18. dxe6+ Ke8 19. a3 {Rogoff,K (2520)-Balinas,R (2440) Lone
Pine 1978 1-0 (32)}) (4... Qa5 5. Nf3 c6 6. Bd2 e6 7. e4 Qc7 8. Rc1 Nbd7 9. e5
Nd5 10. Nxd5 exd5 11. Bd3 Be7 12. O-O Nf8 13. b4 a6 14. Qb3 Qb6 15. a4 Ne6 16.
Qb2 Bd7 17. a5 Qd8 18. Ne1 g5 19. Bf5 {Savic,M (2260)-Draganic,S (2157) Zagreb
2011 0-1 (59)}) 5. Nf3 $146 (5. Bg5 h6 6. Bxf6 gxf6 7. e3 c6 8. Bc4 h5 9. Qb3
Rh7 10. Nge2 Qc7 11. Qc2 Rh6 12. O-O-O Nd7 13. Nf4 Nb6 14. Bb3 Bd7 15. h4 Nc8
16. Qe2 Qa5 17. d5 Bg4 18. f3 Bd7 19. dxc6 Bxc6 {Kloninger,P (2257)-Shkolnik,B
(2290) Bad Zwesten 2005 1-0}) 5... e6 {Controls d5} 6. Bg5 Be7 7. e3 O-O 8. Bd3
h6 {Black threatens to win material: h6xg5} 9. Bh4 Nbd7 10. O-O c5 11. Rc1 cxd4
12. exd4 {Black has a cramped position. Black's piece can't move: c8.} Nb6 {
White has a very active position} 13. Bb1 Bd7 14. Ne5 Nbd5 15. Nxd5 Nxd5 {
White has an active position. The knight feels good on d5} 16. Qd3 f5 17. Bg3 (
17. Bxe7 $5 Nxe7 18. Qb3 $14) 17... a6 18. Nxd7 Qxd7 {White has the pair of
bishops} 19. Be5 {'the bishop is the bishop!'} Bf6 20. Qg3 Rac8 21. a3 {
Consolidates b4} Bg5 {Black threatens to win material: Bg5xc1} 22. Rcd1 Qb5 23.
f4 Bf6 24. Qf2 Qb3 25. Rd3 Qb5 26. Qd2 Qc6 27. Rb3 (27. Ba2 Rfd8 $11) 27... Rf7
28. Rg3 Qb5 29. Bd3 {White threatens to win material: Bd3xb5} (29. Ba2 Bxe5 30.
fxe5 Rc6 $11) 29... Qc6 30. Bb1 {Twofold repetition} Qb6 31. Kh1 Qb5 {Black
has a mate threat} 32. Ba2 $4 (32. Rd1 $142 $11 {had to be tried to avoid
defeat}) 32... Qxf1# 0-1

[Event "SapporoAutumn2017"]
[Site "?"]
[Date "2017.10.08"]
[Round "2.2"]
[White "Yoshii, Yukihiko"]
[Black "Yamada, Akihiro"]
[Result "0-1"]
[ECO "D13"]
[WhiteElo "1883"]
[BlackElo "1956"]
[Annotator "Fritz 15 (30s)"]
[PlyCount "138"]

{D13: Slav Defence: Exchange variation without ...Bf5} 1. c4 c6 2. d4 d5 3.
cxd5 cxd5 4. Nc3 Nf6 5. Nf3 e6 6. a3 (6. Bd2 Nc6 7. Rc1 a6 8. Bf4 Nh5 9. Be5 f6
10. Bg3 e5 11. e3 Nxg3 12. hxg3 e4 13. Nh4 Ne7 14. g4 Qb6 15. Rc2 Be6 16. Nf5
g6 17. Ng3 Nc6 18. f4 Bd6 19. Kf2 O-O 20. a3 Rac8 {Melkumyan,H (2585)-Volkov,S
(2629) St Petersburg 2009 1-0 (57)}) 6... Bd6 $146 (6... Be7 7. Bf4 (7. Bg5 h6
8. Bh4 b6 9. e3 Bb7 10. Bd3 Nbd7 11. O-O O-O 12. Rc1 Rc8 13. Nd2 e5 14. Bg3 e4
15. Be2 a6 16. b4 a5 17. Qb3 Ra8 18. Na4 Ne8 19. Bb5 Ba6 20. Bxa6 Rxa6 21. b5
Ra8 {Palm,N (2275)-Rewitz,P (2296) Denmark 2011 1-0 (36)}) 7... a6 (7... O-O 8.
e3 Nh5 9. Be5 Nc6 10. Bd3 Nxe5 11. Nxe5 Nf6 12. Rc1 Bd7 13. O-O Qb6 14. b4 Rfc8
15. Nxd7 Nxd7 16. Na4 Qd8 17. Qb3 Rxc1 18. Rxc1 Rc8 19. Rc3 g6 20. Qc2 Rxc3 21.
Qxc3 Bd6 22. g3 {Bulavin,A (2237)-Pushin,V (2375) Kazan 2012 1/2-1/2 (40)}) 8.
e3 b5 9. Be2 Nc6 10. O-O Bb7 11. Ne5 O-O 12. Nd3 Na5 13. b4 Nc4 14. a4 Bc6 15.
Qc2 Qb6 16. Rfb1 Rfe8 17. Bg5 h6 18. Bh4 Rec8 19. Nc5 Qd8 20. Rd1 Rcb8 21. Bg3
{Hanel,R (2326)-Weber,G (2383) Jenbach 2001 1/2-1/2}) (6... Nc6 7. Bf4 Ne4 8.
e3 Qa5 9. Qb3 Nxc3 10. bxc3 a6 11. Bd3 b5 12. O-O Qb6 13. a4 Na5 14. Qb2 Nc4
15. Bxc4 dxc4 16. Rfb1 b4 17. cxb4 Bb7 18. b5 axb5 19. Qxb5+ Qxb5 20. axb5 Rc8
21. Rc1 {Bass,L (2419)-Herrera,I (2444) Madrid 2013 1-0}) 7. Bg5 Nbd7 8. e4
dxe4 9. Nxe4 Be7 10. Ng3 (10. Nc3 O-O $11) 10... h6 {Black threatens to win
material: h6xg5} 11. Be3 Nd5 {The knight is not easily driven from d5} 12. Bd3
O-O {White has a very active position} 13. O-O {White castles and improves
king safety} f5 {White has a very active position. Black has a new backward
pawn: e6} 14. Bd2 Bd6 {White has an active position} 15. Re1 {White threatens
to win material: Re1xe6} N7f6 {White has an active position} 16. h3 {White has
a very active position} (16. Qb3 a5 $11) 16... Bd7 (16... Qb6 17. Bc3 $11) 17.
Ne5 $14 {Menacing} Rc8 18. Rc1 Rxc1 19. Qxc1 Qc7 20. Qxc7 {White forks: d6+b7}
Nxc7 21. Bc4 Bxe5 22. dxe5 Nfd5 23. f4 {White has an active position} Bc6 24.
Ne2 Nb6 {Black threatens to win material: Nb6xc4} 25. Bb3 Bd5 26. Bxd5 Nbxd5
27. Nc3 (27. Kf2 Rd8 $11) 27... Rd8 28. Rc1 (28. Ne2 Rf8 $11) 28... Rd7 (28...
Nxc3 29. Bxc3 Rd3 30. Rc2 $15) 29. Nxd5 $11 Nxd5 30. g3 Kf7 31. Kf2 Nf6 32.
exf6 (32. Be3 $142 $5 {might be a viable alternative} Ne4+ 33. Kf3 $11) 32...
Rxd2+ $15 {Black forks: b2} 33. Ke3 Rxb2 34. fxg7 Kxg7 35. Rc3 (35. Rc7+ Kg6
$15) 35... Kf6 $17 36. h4 (36. Kd4 $5 $17) 36... b5 $19 37. Kd4 a5 38. Re3 (38.
h5 a4 $19) 38... Rb1 (38... Rc2 39. h5 $19) 39. Kc5 $2 (39. Kc3 $5 a4 40. Kc2
Rh1 $19) 39... a4 $19 40. Kd6 (40. Re2 $19) 40... Rd1+ $4 {weakening the
position} (40... Kf7 $142 $19 {it becomes clear that Black will call all the
shots}) 41. Kc5 {White threatens to win material: Kc5xb5} (41. Kc6 Rd5 $11)
41... Rb1 42. Kd6 Rd1+ $4 {there were better ways to keep up the pressure} (
42... Kf7 $142 $19 {and Black can look forward to a comfortable game}) 43. Kc5
$15 Rd5+ 44. Kb4 (44. Kc6 h5 $15) 44... Ke7 (44... e5 $5 45. fxe5+ Rxe5 $17)
45. Ka5 Kd6 46. Kb6 Kd7 47. Ka5 Kd6 {Twofold repetition} 48. Kb6 e5 49. fxe5+
Rxe5 50. Rxe5 (50. Rd3+ $142 $5 {must definitely be considered} Rd5 51. Re3 $15
) 50... Kxe5 $17 51. Kxb5 Ke4 52. Kxa4 Kf3 53. Kb4 Kxg3 54. a4 f4 55. a5 f3 56.
a6 f2 57. a7 f1=Q 58. a8=Q Qf4+ 59. Kc3 $2 (59. Ka5 Qf5+ 60. Kb6 Kxh4 $17)
59... Qe3+ (59... Qf3+ {makes it even easier for Black} 60. Qxf3+ Kxf3 61. h5
$19) 60. Kc2 $2 (60. Kb4 Kxh4 61. Qh1+ Kg3 $17) 60... Kxh4 (60... Qf2+ $142 $5
{might be the shorter path} 61. Kc1 Qf1+ 62. Kd2 Qg2+ 63. Qxg2+ Kxg2 64. h5 $19
) 61. Qh1+ Kg3 62. Qh5 Qg5 63. Qh1 Qf5+ 64. Kd2 h5 65. Qg1+ Kh4 66. Ke2 $2 (66.
Qh2+ Kg5 67. Qg3+ Kh6 68. Qd6+ Qg6 69. Qf8+ Kg5 70. Qf3 Qd6+ 71. Ke2 Qe6+ 72.
Kd2 $19) 66... Qg4+ $19 67. Qxg4+ (67. Kf1 Qxg1+ 68. Kxg1 $19) 67... hxg4 68.
Kf2 Kh3 69. Kg1 Kg3 (69... Kg3 70. Kh1 Kf2 71. Kh2 g3+ 72. Kh3 g2 73. Kg4 g1=Q+
74. Kf5 Qe1 75. Kg6 Qe7 76. Kh6 Kf3 77. Kg6 Kf4 78. Kh6 Kf5 79. Kh5 Qg5#) 0-1

[Event "SapporoAutumn2017"]
[Site "?"]
[Date "2017.10.08"]
[Round "2.3"]
[White "Nakamura, Mitsuru"]
[Black "Kanamaru, Tomoji"]
[Result "0-1"]
[ECO "C11"]
[WhiteElo "1000"]
[BlackElo "1647"]
[Annotator "Fritz 15 (30s)"]
[PlyCount "64"]

{C11: French: Classical System: 4 e5 and 4 Bg5 dxe4} 1. e4 e6 2. d4 d5 3. Nc3
Nf6 4. e5 Ne4 5. Nxe4 dxe4 6. f3 $146 (6. Bc4 Nd7 (6... Nc6 7. c3 a6 8. Bb3 Na5
9. Bc2 c5 10. Bxe4 cxd4 11. Qxd4 Qxd4 12. cxd4 Bd7 13. Bd2 Bc6 14. f3 Nc4 15.
Bxc6+ bxc6 16. Rc1 Nxb2 17. Rxc6 Kd7 18. Rb6 Nc4 19. Rb7+ Kc6 20. Rxf7 Rb8 21.
Bc1 {Van der Wiel,J (2540)-Kuijf,M (2440) Eindhoven 1992 1-0 (36)}) (6... c6 7.
Be3 b5 8. Bb3 Bb7 9. Ne2 c5 10. dxc5 Nd7 11. O-O Bxc5 12. Nd4 Qb6 13. a4 a6 14.
axb5 axb5 15. Rxa8+ Bxa8 16. Nxb5 Qxb5 17. c4 Qb6 18. Ba4 Bc6 19. b4 Bxa4 20.
Qxa4 Bxe3 21. fxe3 {Lamoureux,C (2345)-San Marco,B (2250) France 1993 0-1 (31)}
) (6... c5 7. d5 Nd7 8. dxe6 fxe6 9. f4 exf3 10. Nxf3 Nb6 11. Qxd8+ Kxd8 12.
Bd3 c4 13. Be4 Kc7 14. Ng5 h6 15. Nf7 Bb4+ 16. c3 Rf8 17. Nxh6 Bc5 18. Ng4 Bd7
19. Bd2 Bc6 20. Bxc6 Kxc6 21. O-O-O {Matulovic,M (2510)-Maksimovic,B (2400)
Bjelovar 1979 1/2-1/2 (43)}) 7. Ne2 c5 8. c3 Qc7 9. Bf4 e3 10. f3 cxd4 11. Qxd4
b6 12. Bb5 Bc5 13. Qd1 Bb7 14. Qa4 O-O-O 15. O-O-O Nxe5 16. Qxa7 f6 17. Ba6
Bxa6 18. Qa8+ Qb8 19. Qxa6+ Qb7 20. Qxb7+ Kxb7 {Giorgadze,T (2420)-Bednarski,J
(2395) Lublin 1972 1-0 (40)}) (6. c3 c5 7. Bb5+ Bd7 8. Bxd7+ Qxd7 9. Ne2 cxd4
10. Nxd4 Qd5 11. Bf4 Nd7 12. Qa4 Be7 13. Rd1 a6 14. Nf5 Qb5 15. Qxb5 axb5 16.
Nxg7+ Kd8 17. a3 h5 18. g4 hxg4 19. Rg1 Kc7 20. Rxg4 Nc5 {Sampaolesi,N (2200)
-Casas,E (2360) Buenos Aires 1975 0-1 (41)}) (6. Be3 c5 7. dxc5 Nd7 $14) 6...
Qd5 (6... c5 $5 7. dxc5 Qc7 $11) 7. c4 $14 Qa5+ 8. Bd2 Bb4 (8... Qb6 9. Bc3 $14
) 9. fxe4 $16 Nc6 (9... c5 $142 10. d5 exd5 11. exd5 O-O $16) 10. a3 (10. Nf3
$142 $16) 10... Bxd2+ $11 11. Qxd2 Qxd2+ 12. Kxd2 Nxd4 13. Kc3 c5 14. Nf3 Nxf3
15. gxf3 Bd7 16. b4 b6 17. b5 {This push gains space} Ke7 18. Bd3 Rhd8 19. Rhd1
Be8 20. f4 g6 21. h4 Rd4 {The black rook on an outpost} 22. Bc2 Rad8 23. Rh1 (
23. Rxd4 Rxd4 24. a4 Bd7 $11) 23... Bd7 (23... Rd2 24. h5 $15) 24. Rad1 $11 {
White threatens to win material: Rd1xd4} Bc8 25. Rdf1 (25. Rxd4 $142 $5 {
and White can hope to live} Rxd4 26. Rd1 Rxd1 27. Bxd1 $11) 25... Bb7 $17 26.
Re1 f5 (26... Rd2 $142 $5 $17) 27. exf6+ $11 Kxf6 28. e5+ {White wins space} (
28. h5 $5 e5 29. fxe5+ Kxe5 30. Rhg1 $11) 28... Ke7 29. Rhf1 $2 (29. Rh3 $142
$15 {and White hangs on}) 29... Rf8 $19 30. Rd1 (30. h5 gxh5 31. Rg1 h4 $19)
30... Rfxf4 31. Rfe1 (31. Rxf4 Rxf4 32. a4 Rxh4 33. Ra1 $19) 31... Rxc4+ 32.
Kb2 (32. Kb3 {otherwise it's curtains at once} Bd5 33. Bd3 $19) 32... Rf2 (
32... Rf2 33. Rc1 Be4 $19) 0-1

[Event "SapporoAutumn2017"]
[Site "?"]
[Date "2017.10.08"]
[Round "2.4"]
[White "Koyahata, Taku"]
[Black "Ito, Katsuhide"]
[Result "1-0"]
[ECO "D08"]
[WhiteElo "1375"]
[BlackElo "1338"]
[Annotator "Fritz 15 (30s)"]
[PlyCount "59"]

{D08: Albin Counter Gambit} 1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. e3 {
White threatens to win material: e3xd4} (5. Bd2 Bg4 6. Bg5 Qd7 7. Nbd2 h6 8.
Bh4 Bxf3 9. Nxf3 Bb4+ 10. Nd2 Nxe5 11. Qb3 Qe6 12. Qxb4 Nd3+ {0-1 (12) Sushkov,
A (2333)-Afromeev,V (2542) Tula 2003}) 5... Bg4 $146 (5... Bb4+ 6. Bd2 dxe3 7.
fxe3 Bg4 8. Bxb4 (8. Nc3 Nge7 9. a3 Bxc3 10. Bxc3 O-O 11. Qxd8 Raxd8 12. Be2
Ng6 13. Kf2 Rfe8 14. Rad1 Rxd1 15. Rxd1 Kf8 16. h3 Bc8 17. Nd4 Ncxe5 18. Bb4+
Kg8 19. Nb5 Bd7 20. Nxc7 Rc8 21. Nd5 Ba4 22. Rd2 h6 {Schischke,R (2290)-Kalka,
A (2305) Germany 1997 1/2-1/2 (45)}) 8... Qxd1+ 9. Kxd1 Nxb4 10. a3 (10. h3
O-O-O+ 11. Nbd2 Bh5 12. g4 Bg6 13. Nd4 Ne7 14. Bg2 c5 15. Nb5 Nc2 16. Ke2 Nxa1
17. Rxa1 Nc6 18. Bxc6 bxc6 19. Nd6+ Kc7 20. Nb3 f6 21. Nxc5 fxe5 22. Nf5 Bf7
23. b3 Kb6 24. Na4+ Ka5 {Galliamova,A (2478)-Lomineishvili,M (2364) Kutansi
2015 1-0 (64)}) 10... Nc6 11. Nbd2 Bxf3+ 12. gxf3 Nxe5 {1/2-1/2 (12) Szaz,F 
(2201)-Andi,P (2189) Hungary 2008}) 6. Be2 Bb4+ 7. Bd2 d3 {Black threatens to
win material: d3xe2} (7... dxe3 8. fxe3 Bxf3 9. Bxf3 Qh4+ 10. g3 Qxc4 11. Qb3
Qxb3 12. Bxc6+ bxc6 13. axb3 $11) 8. Bxb4 dxe2 9. Qxd8+ Rxd8 10. Bd2 Bxf3 11.
gxf3 Nxe5 {Black forks: c4+f3} 12. Kxe2 Nxc4 13. Bc3 f6 {Prevents intrusion on
e5} 14. Nd2 {White threatens to win material: Nd2xc4} (14. Rc1 $142 Nb6 15. Ba5
$14) 14... b5 $4 {Black loses the upper hand} (14... Nxd2 $142 {and Black has
air to breath} 15. Bxd2 Ne7 $11) 15. Nxc4 $16 bxc4 16. Rhg1 g6 $2 (16... Kf7
$142 $5 $16) 17. Rg4 $18 Kf7 (17... h5 18. Rxg6 Kf7 19. Rag1 $18) 18. Rxc4 Rc8
19. Rd1 Ne7 20. Rd7 c6 (20... Ke6 21. Rdxc7 Rxc7 22. Rxc7 $18) 21. Rxa7 (21.
Re4 $142 {makes it even easier for White} Rhe8 22. Rxa7 c5 $18) 21... Rhd8 (
21... Ra8 {the only chance to get some counterplay} 22. Rca4 Rxa7 23. Rxa7 Ke6
$18) 22. Bb4 c5 (22... Re8 {a fruitless try to alter the course of the game}
23. Bc5 Ra8 24. Rca4 $18) 23. Bxc5 (23. Rxc5 $142 {keeps an even firmer grip}
Rb8 24. Rc4 Re8 $18) 23... Rxc5 (23... Re8 {is one last hope} 24. b4 Kg8 $18)
24. Rxc5 Ke6 (24... g5 {does not save the day} 25. Rcc7 $18) 25. Ra6+ Kd7 26.
Rxf6 Ke8 (26... Rb8 {there is nothing better in the position} 27. b3 h5 $18)
27. Rc7 Nd5 28. Re6+ Kf8 29. Rxh7 Re8 (29... Kg8 {desperation} 30. Rb7 Kf8 31.
Rxg6 Re8 $18) 30. Rh8+ (30. Rh8+ Kf7 31. Rhxe8 g5 32. a4 g4 33. fxg4 Kg7 34. a5
Nf6 35. R8e7+ Kf8 36. a6 Nd5 37. Rd7 Nf6 38. Rxf6+ Ke8 39. Ra7 Kd8 40. Rf8#)
1-0

[Event "SapporoAutumn2017"]
[Site "?"]
[Date "2017.10.08"]
[Round "3.1"]
[White "Yamada, Akihiro"]
[Black "Nishimori, Toshiyuki"]
[Result "1-0"]
[ECO "B21"]
[WhiteElo "1956"]
[BlackElo "1767"]
[Annotator "Fritz 15 (30s)"]
[PlyCount "51"]

{B21: Sicilian: 2 f4 and Morra Gambit} 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. c3
dxc3 5. Nxc3 d6 6. Bc4 e6 7. O-O h6 $146 {Consolidates g5} (7... Nge7 8. Bg5 (
8. Bf4 Ng6 9. Bg3 a6 10. Qe2 Be7 11. Rfd1 O-O 12. Rac1 Kh8 13. Rd2 e5 14. Rcd1
Bg4 15. Qd3 Nd4 16. Ne2 Bg5 17. Nexd4 Bxd2 18. Rxd2 exd4 19. Qxd4 Bxf3 20. gxf3
Qg5 21. Qd5 f5 22. exf5 Nf4 {Kristensen,L (2200)-Iskov,G (2420) Vejle 1974 1-0
(54)}) 8... a6 9. Qe2 (9. Bb3 h6 10. Be3 b5 11. Qe2 Ng6 12. Rad1 Be7 13. Nd4
Nxd4 14. Bxd4 O-O 15. f4 Qc7 16. Qh5 Kh7 17. Rd3 b4 18. Na4 Rb8 19. f5 Ne5 20.
Rh3 Bf6 21. Be3 exf5 22. exf5 Rh8 23. Qe2 Bd7 {Rodriguez Cespedes,A (2450)
-Wostyn,H (2265) Nice 1974 0-1}) 9... h6 10. Bh4 (10. Be3 Ng6 11. Rfd1 Bd7 12.
Rac1 Be7 13. Bb3 b5 14. Nd4 Na5 15. f4 Nxb3 16. axb3 O-O 17. e5 Qb8 18. Nf3 Rd8
19. Qf2 Be8 20. Bb6 Rc8 21. f5 Nxe5 22. Nxe5 dxe5 23. fxe6 fxe6 24. Ne4 Bh5 {
Dongre,R (2245)-Suvrajit,S (2335) Kolkata 1999 0-1}) 10... Qa5 11. Bg3 Ng6 12.
Qd2 Nge5 13. Nxe5 dxe5 14. a3 Be7 15. b4 Qd8 16. Qa2 b5 17. Bb3 O-O 18. Qb2 Bb7
19. Ne2 Bf6 20. f3 Qc7 21. Rac1 Rfd8 22. Kh1 {Smith,K (2395)-Byrne,D (2470)
San Antonio 1972 0-1 (34)}) 8. Qe2 Qc7 {Black has a cramped position} 9. Bf4 a6
{Secures b5} 10. Rfd1 Ne5 $2 (10... b5 11. e5 bxc4 12. exd6 Qa5 $16) 11. Bb3 (
11. Bxe5 $5 dxe5 12. Rac1 $18) 11... Nf6 12. Rac1 Qb8 13. a4 (13. Nxe5 dxe5 14.
Na4 $16) 13... Be7 $11 {Black is behind in development.} 14. Nd4 {White has a
very active position} O-O 15. h3 {Prevents intrusion on g4} Nfd7 16. Be3 Nc5
17. Ba2 Nc6 18. f4 (18. Nxc6 bxc6 19. Rc2 Nd7 $11) 18... Rd8 (18... Nb4 19. Bc4
$15) 19. Qh5 {[%cal Yf4f5] White plans f5} (19. f5 Re8 $11) 19... Nb4 (19...
Qc7 $5 $15) 20. Bc4 {Black has a cramped position} Bf8 (20... Qc7 21. f5 $11)
21. f5 $14 {White gains space} Qc7 (21... d5 22. fxe6 dxc4 23. Qxf7+ Kh7 24. e7
Bxe7 25. Qxe7 $14) 22. fxe6 Nxe6 $2 (22... fxe6 $142 {and Black can hope to
survive} 23. Nf5 Bd7 24. Bxh6 Nc6 $16) 23. Bxe6 $18 g6 $4 {but even a better
move would not have saved the game} (23... Bxe6 $142 24. Nxe6 fxe6 $18) 24.
Qxg6+ Bg7 25. Nf5 fxe6 26. Nd5 (26. Nd5 Nc2 27. Nf6+ Kf8 28. Nxh6 d5 29. e5
Bxf6 30. Qg8+ Ke7 31. Qf7#) 1-0

[Event "SapporoAutumn2017"]
[Site "?"]
[Date "2017.10.08"]
[Round "3.2"]
[White "Koyahata, Taku"]
[Black "Sugimoto, Koichi"]
[Result "0-1"]
[ECO "D15"]
[WhiteElo "1375"]
[BlackElo "1999"]
[Annotator "Fritz 15 (30s)"]
[PlyCount "44"]

{D15: Slav Defence: 4 Nc3 a6 and gambit lines after 4 Nc3 dxc4} 1. d4 d5 2. c4
c6 3. Nc3 Nf6 4. Nf3 a6 5. g3 dxc4 6. Bg2 Bf5 $146 (6... b5 7. Ne5 Bb7 8. O-O
e6 9. b3 cxb3 10. axb3 Be7 (10... Nbd7 11. Qc2 Rc8 12. Rd1 Be7 13. Bb2 O-O 14.
Ne4 Nxe4 15. Nxd7 Qxd7 16. Bxe4 h6 17. Qc3 Rfd8 18. Rd3 Qc7 19. Rc1 Bf8 20. Qd2
c5 21. Bxb7 Qxb7 22. dxc5 Rxd3 23. Qxd3 Rxc5 24. Ra1 Rd5 25. Qc2 {Radovanovic,
M (2421)-Lukovic,V (2438) Kragujevac 2015 0-1 (37)}) 11. Bb2 O-O 12. Ne4 Nxe4
13. Bxe4 a5 14. Qd3 h6 15. f4 Bd6 16. Qe3 Nd7 (16... Qe7 17. Bc2 Rd8 18. f5
Bxe5 19. Qxe5 Nd7 20. Qc7 Rdc8 21. f6 Rxc7 22. fxe7 Nf6 23. Ra2 Rxe7 24. Rfa1
Ree8 25. Rxa5 Rxa5 26. Rxa5 Ra8 27. Rxa8+ Bxa8 28. Ba3 Nd7 29. g4 Nf6 30. h3
Nd5 31. Bd6 {Moiseenko,A (2710)-Yilmaz,M (2582) Kocaeli 2015 1/2-1/2 (43)}) 17.
Rac1 Nxe5 18. fxe5 Be7 19. h4 f5 20. exf6 Rxf6 21. d5 {Ipatov,A (2625)-Eljanov,
P (2717) Baku 2015 0-1 (54)}) 7. Ne5 e6 {Covers d5} (7... Be6 8. O-O $11) 8. a3
{Controls b4} Bd6 (8... Nbd7 9. Nxc4 Be7 10. e4 $14) 9. Nxc4 $16 Bc7 10. O-O
O-O 11. e4 {White threatens to win material: e4xf5} Bg6 12. d5 (12. Bg5 $5 h6
13. Bh4 $16) 12... cxd5 13. exd5 exd5 14. Nxd5 Nxd5 15. Bxd5 Nc6 16. Be3 Rc8
17. Bxc6 bxc6 {Black has the pair of bishops} 18. Qa4 a5 (18... Qd5 $142 $11)
19. Qxc6 $4 {forfeits the advantage} (19. Rfe1 $142 $14 {is a viable option})
19... Bxg3 $1 $17 {Discovered attack: c7, Rc8xc6} 20. Qa4 $4 {leading to a
quick end} (20. fxg3 Rxc6 {Discovered attack}) (20. hxg3 Rxc6 {Discovered
attack}) 20... Bxh2+ $1 $19 {Decoy: e5} 21. Kh1 (21. Kxh2 Qc7+ {Decoy Double
attack}) 21... Qh4 22. Nb6 Be4+ (22... Be4+ 23. Qxe4 Bf4+ 24. Kg2 Qg4+ 25. Kh1
Qh3+ 26. Kg1 Qh2#) (22... Bf4+ 23. Kg2 Qg4+ 24. Kh1 Qh3+ 25. Kg1 Qh2#) 0-1

[Event "SapporoAutumn2017"]
[Site "?"]
[Date "2017.10.08"]
[Round "3.3"]
[White "Kanamaru, Tomoji"]
[Black "Yoshii, Yukihiko"]
[Result "0-1"]
[ECO "C97"]
[WhiteElo "1647"]
[BlackElo "1883"]
[Annotator "Fritz 15 (30s)"]
[PlyCount "52"]

{C97: Closed Ruy Lopez: Chigorin Defence: 11 d4 Qc7, sidelines} 1. e4 e5 2. Nf3
Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10.
Bc2 c5 11. d4 Qc7 12. Nbd2 Bb7 13. d5 Rac8 (13... g6 14. Nf1 Nh5 15. b3 Bc8 16.
Bh6 Ng7 17. g4 Nb7 18. Ng3 Nd8 19. a4 bxa4 20. Rxa4 Bd7 21. Ra3 f6 22. Qe2 Bb5
23. Bd3 Bxd3 24. Qxd3 Qb7 25. Rea1 Nf7 26. Bxg7 Kxg7 27. Nd2 Rfc8 28. Qc4 {
Kveinys,A (2555)-Luetke,J (2335) Bonn 1993 1-0 (48)}) (13... Nd7 14. Nf1 c4 15.
Ng3 g6 16. Bd2 Rfb8 17. Nh2 Bc8 18. Ng4 Nf6 19. Nh6+ Kg7 20. Qf3 Bf8 21. Bg5
Ng8 22. Nh5+ gxh5 23. Qg3 Bg4 24. Nxg8 Kxg8 25. hxg4 hxg4 26. Qxg4 Qc8 27. Qh4
f6 28. Bxf6 {Antoniewski,R (2461)-Svatos,J (2307) Czechia 2001 1-0 (58)}) 14.
Nf1 c4 $146 {Black gets more space} (14... Rfe8 15. Ng3 g6 16. b3 Bf8 17. Nh2
Ba8 18. Ng4 Nxg4 19. Qxg4 Bg7 20. h4 h5 21. Nxh5 gxh5 22. Qxh5 f6 23. Re3 Qf7
24. Qf5 Kf8 25. Bd1 Rc7 26. Bh5 Qd7 27. Qxd7 Rxd7 28. Bxe8 Kxe8 29. h5 {
Alaboudi,M (2200)-Ouennougui,Z (2200) Belfort 1983 1-0 (54)}) (14... Nc4 15. b3
Nb6 16. Ne3 $14) 15. Ng3 Rce8 (15... g6 16. Bd2 $16) 16. Nf5 Bc8 17. N3h4 (17.
Nxe7+ Qxe7 18. b4 Nb7 $16) 17... h6 (17... Bd8 18. b4 cxb3 19. axb3 $16) 18.
Nxh6+ (18. b4 Nb7 19. a4 $16) 18... Kh8 (18... gxh6 $142 $5 {is an interesting
alternative} 19. Bxh6 Nb7 $14) 19. N6f5 $16 g6 (19... Bd8 $16) 20. Nxe7 $18
Qxe7 21. Bg5 Kg7 22. Re3 (22. b4 Nb7 $18) 22... Qc7 23. Rf3 Nh7 24. Qd2 Nxg5
25. Qxg5 Qe7 26. Rf6 $4 {ruins a clearly superior position} (26. Qg3 $142 Kh6
27. b4 $16) 26... Qxf6 $19 (26... Qxf6 27. Qxf6+ Kxf6 $19) 0-1

[Event "SapporoAutumn2017"]
[Site "?"]
[Date "2017.10.08"]
[Round "3.4"]
[White "Ito, Katsuhide"]
[Black "Nakamura, Mitsuru"]
[Result "1-0"]
[ECO "B99"]
[WhiteElo "1338"]
[BlackElo "1000"]
[Annotator "Fritz 15 (30s)"]
[PlyCount "59"]

{B99: Sicilian Najdorf: 6 Bg5 e6 7 f4 Be7 8 Qf3 Qc7 9 0-0-0 Nbd7} 1. e4 c5 2.
Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 Qc7 9. O-O-O
Nbd7 10. Kb1 b5 11. Bd3 Bb7 12. Rhe1 O-O $146 (12... Qb6 13. Nb3 b4 14. Ne2 h6
15. Bh4 Rc8 16. Bf2 Qc7 17. Rc1 d5 18. Ng3 dxe4 19. Nxe4 O-O 20. g3 a5 21. Bd4
a4 22. Nbd2 Rfd8 23. Qe2 a3 24. b3 Nxe4 25. Nxe4 Bxe4 26. Qxe4 Nf6 27. Bxf6 {
Visser,Y (2370)-Dvoirys,S (2580) Leeuwarden 1995 0-1 (35)}) (12... Nc5 13. Bxf6
gxf6 14. a3 h5 15. Qh3 Bc8 16. g4 h4 17. f5 Bd7 18. Qf3 Rb8 19. fxe6 fxe6 20.
Nd5 exd5 21. exd5 Kd8 22. Bg6 Rg8 23. Rxe7 Kxe7 24. Re1+ Kd8 25. Qxf6+ Kc8 26.
Re7 b4 27. a4 {Mitrev,E (2171)-Georgiev,S (2173) Sunny Beach 2015 0-1 (45)}) (
12... Nb6 13. Bxf6 gxf6 14. Qh5 Qc5 15. e5 O-O-O 16. Qxf7 Qxd4 17. Be4 Qc4 18.
Bxb7+ Kxb7 19. exd6 e5 20. Qxe7+ Nd7 21. fxe5 fxe5 22. Rxe5 Rhe8 23. Re4 Qg8
24. Qh4 Qxg2 25. Rxe8 Rxe8 26. Qxh7 Qg4 27. h3 {Navara,D (2175)-Subrt,J (2205)
Czechia 1998 1-0 (48)}) (12... O-O-O 13. f5 e5 14. Nb3 Nb6 15. Bxf6 Bxf6 16.
Bxb5 d5 17. Bd3 d4 18. Ne2 Na4 19. c3 Kb8 20. cxd4 exd4 21. Nf4 Ka7 22. Nc1 Qd6
23. g3 Rhe8 24. Qf2 Rc8 {1/2-1/2 (24) Kosasih,C (2320)-Timoshenko,G (2570)
Jakarta  1997}) (12... b4 13. Nd5 exd5 $11) 13. Qg3 {White has an active
position} Kh8 (13... b4 $142 $5 {should not be overlooked} 14. Na4 Qa5 $11) 14.
e5 $16 Ng8 $4 {another step towards the grave} (14... dxe5 $142 15. fxe5 Nh5
$16) 15. Bxh7 (15. Qh4 {might be the shorter path} h6 16. Bxe7 dxe5 17. fxe5
Nxe7 18. Qxe7 Qd8 $18) 15... Bxg5 16. fxg5 Kxh7 17. Ne4 $4 {White threatens to
win material: Ne4xd6. not a good decision, because now the opponent is right
back in the game} (17. exd6 Qc5 18. Qh4+ Nh6 19. gxh6 g5 $18) 17... Nxe5 $2 (
17... dxe5 18. Qh3+ Kg6 $16) 18. Nf3 $4 {a weak move, ruining a winning
position} (18. Qh4+ $142 Nh6 19. Nf6+ Kh8 20. gxh6 $18) 18... Rad8 $4 {gives
away a clear win} (18... Ne7 $142 {and Black is on the road to success} 19.
Qh3+ Kg8 20. Nf6+ gxf6 21. gxf6 Bxf3 22. gxf3 N5g6 23. fxe7 Qxe7 $19) 19. Qh3+
(19. Qh4+ Nh6 20. Nf6+ Kh8 21. gxh6 $18) 19... Kg6 $4 {further deteriorates
the position} (19... Nh6 $142 20. gxh6 Bxe4 21. hxg7+ Kxg7 22. Rxe4 Rh8 23.
Qg3+ Ng6 $16) 20. Nh4+ $18 Kh7 21. g6+ $1 {Double attack: g6/h7} Nxg6 (21...
Nxg6 22. Ng5+ {Double attack}) (21... fxg6 22. Ng5+ {Mate attack Decoy}) 22.
Ng5+ Kh6 23. Nhf3+ Nh4 24. Qxh4+ Kg6 25. Nh7 (25. Qh7+ Kf6 26. Nd4 Qd7 27.
Ngxe6 fxe6 28. Rf1+ Ke5 29. Nc6+ Bxc6 30. Rde1+ Kd5 31. Qd3+ Kc5 32. Qe3+ Kc4
33. Qc3+ Kd5 34. Rd1+ Ke4 35. Qe1#) 25... Rfe8 $4 {terrible, but the game is
lost in any case} (25... Bxf3 26. Nxf8+ Rxf8 27. gxf3 $18) 26. Rf1 (26. Nfg5
$142 {and White can celebrate victory} Bxg2 27. Rg1 $18) 26... Nh6 $16 27. Nfg5
Nf5 $4 {strolling merrily down the path to disaster} (27... Qc4 $142 28. Rf4
Nf5 $16) 28. Qh3 $18 f6 (28... Bxg2 {is still a small chance} 29. Qxg2 Ne3 30.
Qe4+ Nf5 $18) 29. g4 Nh6 (29... Qxc2+ {does not solve anything} 30. Ka1 Qxh2
31. Qxh2 Ng3 32. Qxg3 f5 33. gxf5+ exf5 34. Ne6+ Kf7 35. Qxg7+ Kxe6 36. Ng5#)
30. Qh5# 1-0

[Event "SapporoAutumn2017"]
[Site "?"]
[Date "2017.10.09"]
[Round "4.1"]
[White "Sugimoto, Koichi"]
[Black "Yamada, Akihiro"]
[Result "0-1"]
[ECO "D91"]
[WhiteElo "1999"]
[BlackElo "1956"]
[Annotator "Fritz 15 (30s)"]
[PlyCount "58"]

{D91: Gr・feld: 4 Nf3 Bg7 5 Bg5} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bg5
c6 6. e3 (6. Bxf6 Bxf6 7. cxd5 cxd5 8. Qb3 e6 9. e3 O-O 10. Be2 Nc6 11. O-O Na5
12. Qc2 Bd7 13. b4 Nc6 14. a3 a5 15. b5 Ne7 16. Na4 Nf5 17. Ne5 Be8 18. Qb2 Nd6
19. Rac1 Bg7 20. f4 f6 {Ghitescu,T (2450)-Malich,B (2490) Lugano 1968 1/2-1/2})
6... Be6 (6... Ne4 7. Bh4 O-O 8. Bd3 Nxc3 9. bxc3 dxc4 10. Bxc4 c5 11. O-O Nc6
12. Qe2 a6 13. Rfd1 cxd4 14. cxd4 b5 15. Bd3 Bb7 16. Rac1 Qd7 17. Nd2 Nb4 18.
Bb1 Bd5 19. a3 Nc6 20. Ne4 Bc4 21. Qf3 {Jacko,V (2281)-Najgebauer,S (2214)
Slovakia 2014 0-1}) 7. Qb3 Qb6 8. Na4 $146 {White threatens to win material:
Na4xb6} (8. Qxb6 axb6 9. Bxf6 Bxf6 10. cxd5 Bxd5 11. Nxd5 cxd5 $11) 8... Qa5+
$11 9. Nc3 Qb6 10. c5 {White gets more space} Qxb3 11. axb3 {White has new
doubled pawns: b2+b3} Nbd7 (11... Ne4 12. Bf4 Nd7 13. b4 O-O 14. b5 Ndxc5 15.
bxc6 bxc6 16. dxc5 Nxc3 17. Nd4 Ne4 18. Nxc6 Bxb2 19. Nxe7+ Kg7 20. Ra6 Nxc5
21. Rc6 Nd7 22. Ba6 Bf6 23. Bd6 Nb8 24. Bb7 Nxc6 25. Nxc6 Rfd8 26. Bc7 {
Burgess,G (2335)-Hutters,T (2260) Aarhus 1990 0-1 (42)}) 12. Bd3 Bf5 13. Bxf5
gxf5 14. O-O Ne4 15. Bf4 f6 {Secures e5} 16. Nh4 e6 {Controls f5} 17. b4 a6 {
Covers b5} 18. f3 Nxc3 19. bxc3 {White has a new doubled pawn: c5} Nf8 20. Rfb1
Rd8 21. b5 (21. Re1 Ng6 22. Bg3 Bh6 $11) 21... axb5 $15 22. Ra7 {White
threatens to win material: Ra7xb7} Rd7 23. Ra8+ Kf7 {Black loses the right to
castle} 24. Rba1 Ng6 25. Nxg6 hxg6 26. Rxh8 Bxh8 27. Ra8 {White threatens to
win material: Ra8xh8} Bg7 28. Bd6 g5 (28... e5 $5 $15) 29. Rb8 (29. f4 $5 $11 {
is worthy of consideration}) 29... f4 (29... f4 30. exf4 gxf4 $15) 0-1

[Event "SapporoAutumn2017"]
[Site "?"]
[Date "2017.10.09"]
[Round "4.2"]
[White "Nishimori, Toshiyuki"]
[Black "Yoshii, Yukihiko"]
[Result "1-0"]
[ECO "D50"]
[WhiteElo "1767"]
[BlackElo "1883"]
[Annotator "Fritz 15 (30s)"]
[PlyCount "139"]

{D50: Queen's Gambit Declined: Dutch-Peruvian Gambit} 1. d4 d5 2. c4 c6 3. Nc3
Nf6 4. Bg5 e6 5. e3 Bb4 6. a3 $146 (6. Bxf6 Qxf6 7. Nf3 Nd7 8. Qb3 Qe7 9. a3
Ba5 10. Be2 Bc7 11. Rc1 Bd6 12. h4 f5 13. g3 O-O 14. Nd2 Kh8 15. f4 Nf6 16. Nd1
dxc4 17. Nxc4 Ne4 18. Rg1 Bc7 19. Nf2 b5 20. Nd2 Nxd2 {Ninkovic,V (2177)
-Djuric,Z (2254) Serbia 2011 1/2-1/2 (33)}) (6. Qc2 Nbd7 7. cxd5 exd5 8. Bd3 g6
(8... h6 9. Bh4 Qa5 (9... Qe7 10. Nge2 O-O 11. a3 Ba5 12. b4 Bd8 13. b5 Re8 14.
bxc6 bxc6 15. O-O Nb6 16. Na4 Bc7 17. Nxb6 Bxh2+ 18. Kh1 axb6 19. Bxf6 Qc7 20.
Bh4 Bd6 21. Bg3 Bxg3 22. Nxg3 c5 23. Be2 Qe7 24. Bf3 {Taylor,T (2320)
-Sevillano,E (2470) Los Angeles 2006 1/2-1/2 (66)}) 10. Nge2 O-O 11. O-O Bd6
12. f3 Qc7 13. Kh1 g5 14. Bg3 Nh5 15. Bxd6 Qxd6 16. e4 Nb6 17. e5 Qe7 18. f4 f6
19. Rae1 fxe5 20. fxe5 Bg4 21. Kg1 Rxf1+ 22. Rxf1 Rf8 23. Rxf8+ {Lorscheid,G 
(2294)-Gritsch,C (2172) Balingen 2006 1-0 (40)}) 9. Nge2 a5 10. O-O Be7 11. f3
Nh5 12. Bxe7 Qxe7 13. e4 dxe4 14. fxe4 O-O 15. Rae1 c5 16. Nd5 Qg5 17. dxc5 Ne5
18. Nd4 Be6 19. Nf3 Nxf3+ 20. Rxf3 Bxd5 {Priehoda,V (2400)-Okhotnik,V (2410)
Litomysl 1997 1-0 (50)}) (6. Qb3 Be7 $11) 6... Bxc3+ $11 7. bxc3 {White has
the pair of bishops} Nbd7 8. Nf3 h6 9. Bh4 O-O 10. cxd5 cxd5 11. Bd3 Qa5 12.
Qc2 (12. Qb3 Ne4 $14) 12... b5 (12... b6 $142 $5 $15 {should be considered})
13. O-O $14 Bb7 14. h3 {Prevents intrusion on g4} (14. a4 Rfc8 $16) 14... Rac8
{[%cal Ra5c3,Rc8c3,Gc2c3] The backward pawn on c3 becomes a target} 15. Rfc1
Rc6 (15... Ne4 16. Bxe4 dxe4 17. Nd2 $11) 16. Ne5 (16. Bxf6 $142 $5 gxf6 17. a4
$16) 16... Nxe5 $11 17. dxe5 Nd7 18. f4 (18. Be7 Rfc8 19. Bb4 Qb6 $11) 18...
Rfc8 19. Be1 Qb6 {Black threatens to win material: Qb6xe3} 20. Qe2 a6 21. Bd2
Nc5 22. Bc2 Ne4 23. Bxe4 dxe4 {Opposite coloured bishops appeared.} 24. Kh2 Rc4
{Black can be proud of that piece} 25. Rcb1 Qc5 26. a4 Bc6 27. axb5 {White
forks: a6+c6} Bxb5 {White has a new passed pawn: c3. Black has a new passed
pawn: a6.} 28. Qh5 Rd8 29. Rd1 (29. Rb2 Rd3 $17) 29... Ba4 (29... Ra4 30. Rxa4
Bxa4 31. Rb1 $17) 30. Rdb1 Be8 (30... a5 31. Qe2 $17) 31. Qe2 (31. Rxa6 $5 {
is an interesting alternative} Rxd2 32. Ra8 Qxe3 33. Rxe8+ Kh7 34. Qxf7 Rxg2+
35. Kxg2 Qf3+ 36. Kg1 Qe3+ 37. Kg2 Qf3+ 38. Kg1 Qe3+ 39. Kg2 $11) 31... Bb5 32.
Qe1 Rd3 33. Rb2 Qd5 34. Rc1 Rc8 35. Qf2 (35. c4 Rxc4 36. Rxc4 Qxc4 $17) 35...
Rd8 (35... a5 36. c4 Bxc4 37. Rbc2 $17) 36. Be1 Qc5 {Black threatens to win
material: Qc5xe3} 37. Bd2 (37. c4 $15) 37... Qd5 {Twofold repetition} 38. Be1
Rd1 (38... Bc4 39. Ra1 $17) 39. Rxd1 $15 Qxd1 40. Rd2 (40. Rb4 Bd3 $15) 40...
Rxd2 41. Qxd2 Qxd2 42. Bxd2 f5 43. exf6 gxf6 44. Bc1 f5 45. Kg3 Kf7 46. Ba3 a5
47. Kf2 h5 48. h4 a4 49. Ke1 Kf6 50. Bd6 Bc4 {The bishop likes it on c4} 51.
Kd2 Kf7 52. Kc1 Ke8 53. Kb2 Kd7 {Black threatens to win material: Kd7xd6} 54.
Be5 Kc6 55. Ka3 {White threatens to win material: Ka3xa4} Kb5 56. Bd6 Bb3 {
'the bishop is the bishop!'} 57. Be5 Kc4 58. Bd4 Kd3 59. Kb4 Ke2 60. c4 Kf2 61.
c5 Bd5 62. Kb5 (62. Kxa4 $142 {is a viable option} Kxg2 63. Kb5 $11) 62... a3
$17 63. c6 Bxc6+ $4 {allows the opponent back into the game.} (63... Kxg2 $142
64. c7 Bb7 $17) 64. Kxc6 $16 a2 $4 {causes further problems for ?} (64... Kxg2
$142 65. Kd6 Kg3 66. Kxe6 Kg4 $16) 65. Kd6 $18 a1=Q 66. Bxa1 Kxe3 67. Ke5 Kd3 (
67... Kf2 {hardly improves anything} 68. Kxe6 Ke2 69. Bd4 Kd3 70. Ba7 e3 71.
Kxf5 e2 72. Bf2 e1=Q 73. Bxe1 Ke2 74. g4 hxg4 75. Kxg4 Ke3 76. f5 Kd3 77. f6
Kc2 78. Kf5 Kd3 79. f7 Kc2 80. f8=Q Kb2 81. Qc5 Kb3 82. Qc3+ Ka2 83. Qb4 Ka1
84. Bc3+ Ka2 85. Qb2#) 68. Bd4 e3 (68... Kc4 {does not improve anything} 69.
Bg1 e3 70. Kxe6 Kc3 71. Bxe3 Kd3 72. Kxf5 Kxe3 73. g4 hxg4 74. Kxg4 Kd2 75. f5
Kc3 76. h5 Kc4 77. f6 Kc5 78. f7 Kd6 79. f8=Q+ Kd5 80. Qb4 Ke6 81. h6 Ke5 82.
h7 Kd5 83. h8=Q Ke6 84. Qe8+ Kf6 85. Qbf8#) 69. Bb6 e2 70. Bf2 (70. Bf2 Kd2 71.
Kxe6 Kc2 72. Kxf5 e1=Q 73. Bxe1 Kd3 74. g4 hxg4 75. Kxg4 Ke2 76. f5 Kxe1 77. f6
Ke2 78. f7 Kd2 79. f8=Q Kc3 80. Qc5+ Kb3 81. h5 Kb2 82. h6 Ka2 83. Qb5 Ka1 84.
h7 Ka2 85. h8=Q Ka3 86. Qa8#) 1-0

[Event "SapporoAutumn2017"]
[Site "?"]
[Date "2017.10.09"]
[Round "4.3"]
[White "Ito, Katsuhide"]
[Black "Kanamru, Tomoji"]
[Result "0-1"]
[ECO "C02"]
[WhiteElo "1338"]
[BlackElo "1647"]
[Annotator "Fritz 15 (30s)"]
[PlyCount "54"]

{C02: French: Advance Variation} 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3
Bd7 6. Be2 f6 7. Bb5 $146 (7. exf6 Nxf6 8. O-O Bd6 9. Bg5 O-O 10. c4 cxd4 11.
Nxd4 Nxd4 12. Qxd4 Qc7 13. Qh4 Ne4 14. Be3 Bf4 15. cxd5 exd5 16. Qh5 Rf5 17.
Bxf4 Qxf4 18. Qf3 Qe5 19. Qb3 Raf8 20. Qxb7 Nxf2 21. Bf3 Ng4 {Mestel,A (2450)
-Ostos,J (2270) Mexico City 1977 0-1}) (7. c4 cxd4 8. cxd5 exd5 9. exf6 Nxf6
10. Nxd4 Bc5 11. Nxc6 Bxc6 12. O-O O-O 13. Nd2 Qb6 14. Qb3 Rae8 15. Qxb6 Bxb6
16. Bd3 Ng4 17. Nf3 Rxf3 18. gxf3 Ne5 19. Be2 d4 20. Bd2 d3 21. Bd1 Nxf3+ {
Kupreichik,V (2535)-Dolmatov,S (2535) Vilnius 1980 0-1 (35)}) (7. O-O cxd4 8.
cxd4 fxe5 9. Nxe5 (9. dxe5 Nge7 10. Nc3 Ng6 11. Re1 Be7 12. Bd3 O-O 13. Bxg6
hxg6 14. Qd3 Be8 15. a3 Rc8 16. b4 a6 17. Bd2 g5 18. h3 Bh5 19. g4 Rxf3 20.
Qxf3 Bg6 21. Rac1 Nd4 22. Qd1 Qf8 23. Kg2 a5 {Buecker,P (2310)-Lieb,H (2285)
Meinberg 1986 0-1 (41)}) 9... Nxe5 10. dxe5 Bc5 11. Qd3 Ne7 12. Be3 Bxe3 13.
Qxe3 Nf5 14. Qd2 Qb6 15. Nc3 Qd4 16. Qxd4 Nxd4 17. Bd3 O-O 18. f4 g6 19. g4 b5
20. Rac1 b4 21. Ne2 Nxe2+ {Libiszewski,F (2215)-Sebban,J (2170) France 1998 1/
2-1/2}) 7... Nxe5 8. Qe2 $4 {White loses the upper hand} (8. Nxe5 $142 {
and White can hope to survive} fxe5 9. Qh5+ Ke7 10. Bxd7 Kxd7 11. dxe5 $11)
8... Nxf3+ $17 9. gxf3 Bxb5 10. Qxb5+ Qd7 11. Qe2 (11. Qxd7+ Kxd7 12. dxc5 Bxc5
$17) 11... cxd4 $19 12. cxd4 Bd6 13. Nc3 Ne7 14. b3 (14. O-O Nf5 $19) 14... O-O
15. O-O a6 (15... Rac8 {might be the shorter path} 16. Bb2 $19) 16. Re1 (16. f4
Rac8 17. Na4 Rc6 $19) 16... e5 17. a4 $2 (17. dxe5 fxe5 18. f4 $19) 17... exd4
18. Ba3 (18. Nd1 $19 {the last chance for counterplay}) 18... Bxa3 19. Rxa3 (
19. Nd1 {doesn't improve anything} Bb4 20. Qe6+ Qxe6 21. Rxe6 Nc6 $19) 19...
Ng6 (19... dxc3 $142 {seems even better} 20. Qxe7 Qxe7 21. Rxe7 Rfe8 22. Rxb7
d4 $19) 20. Qe6+ (20. Nxd5 {is still a small chance} Qxd5 21. Qc4 Qxc4 22. bxc4
$19) 20... Qxe6 21. Rxe6 dxc3 22. Ra1 Rfe8 23. Rb6 Re7 24. Rd6 (24. h3 $19 {
hoping against hope}) 24... Rae8 25. Kf1 Nf4 26. b4 (26. Rc1 {is not the
saving move} c2 $1 {Deflection: e1} 27. Rd8 Rxd8 28. Rxc2 Rde8 29. Rc1 d4 30.
Rd1 d3 31. h4 d2 32. Kg1 Re1+ 33. Kh2 Rxd1 34. a5 Rg1 35. Kxg1 d1=Q+ 36. Kh2
Qxf3 37. b4 Qg2#) 26... c2 27. Rc1 (27. Rd8 {doesn't do any good} Rxd8 28. h3
Rde8 29. Kg1 Re1+ 30. Kh2 Rxa1 31. h4 c1=Q 32. Kg3 g5 33. Kg4 Qc8+ 34. Kg3 Qh3#
) 27... Re1+ $1 {Mate attack} (27... Re1+ 28. Rxe1 Rxe1+ 29. Kxe1 c1=Q#) 0-1

[Event "SapporoAutumn2017"]
[Site "?"]
[Date "2017.10.09"]
[Round "4.4"]
[White "Nakamura, Mitsuru"]
[Black "Koyahata, Taku"]
[Result "0-1"]
[ECO "B94"]
[WhiteElo "1000"]
[BlackElo "1375"]
[Annotator "Fritz 15 (30s)"]
[PlyCount "46"]

{B94: Sicilian Najdorf: 6 Bg5 Nbd7} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6
5. Nc3 a6 6. Bg5 Nbd7 7. f4 Qb6 8. Nb3 (8. Qd2 Qxb2 9. Rb1 Qa3 10. Bxf6 gxf6
11. Nd5 Rb8 12. Rb3 Qa4 13. Bxa6 e5 14. Rb4 Qxa2 15. Nb3 bxa6 16. Qc3 {1-0 (16)
Stripunsky,A (2475)-Granda Zuniga,J (2630) New York 1998}) 8... e5 $146 (8...
h6 9. Bxf6 Nxf6 10. Qd2 (10. Be2 Qe3 11. Rf1 Bg4 12. Qd2 Qxd2+ 13. Nxd2 Bxe2
14. Kxe2 e6 15. Rad1 Rc8 16. Rf3 Be7 17. Rd3 O-O 18. h3 Rfd8 19. g4 b5 20. a3
Nd7 21. Nf3 Nb6 22. Kd2 Bf6 23. b3 Rd7 24. e5 dxe5 {Cagasik,T (2235)-Holeksa,Z
(2181) Czechia 2014 0-1 (61)}) 10... e6 (10... e5 11. O-O-O Be7 12. f5 Bd7 13.
Be2 a5 14. Qd3 O-O 15. Nd2 Rfd8 16. Nc4 Qb4 17. Ne3 Bc6 18. Ned5 Bxd5 19. Nxd5
Nxd5 20. Qxd5 Rdc8 21. Bh5 Rf8 22. Rd3 Rac8 23. Rb3 Qa4 24. Kb1 Rc7 25. Be2 {
Stojanovic,A (2372)-Komiagina,M (2283) St Petersburg 2009 1-0 (40)}) 11. Be2
Be7 12. O-O-O Nd7 13. Kb1 Qc7 14. Bf3 Nb6 15. Na5 Nc4 16. Nxc4 Qxc4 17. g4 Bd7
18. Rhe1 O-O-O 19. Re3 Bc6 20. Nd5 exd5 21. Rc3 Qa4 22. exd5 Bf6 23. Ra3 {
Kretek,B (2264)-Jasny,S (2331) Czechia 2006 0-1 (47)}) 9. f5 {Black has a
cramped position. Black's piece can't move: c8} Be7 10. Bxf6 (10. Qf3 h6 11.
Be3 Qc7 $11) 10... Nxf6 {Black has the pair of bishops} 11. Qf3 Bd7 12. O-O-O
O-O (12... Rc8 $142 $5 $11 {has some apparent merit}) 13. g4 $14 h6 (13... h5
14. g5 Ng4 15. f6 $14) 14. h4 $16 Nh7 (14... Ne8 $5 $16) 15. Nd5 $18 Qd8 16.
Kb1 $4 {with this move White loses his initiative} (16. g5 $142 {and White can
look forward to a comfortable game} Kh8 17. Kb1 $18) 16... Bxh4 $11 17. Nc3 (
17. Na5 $1 {is worth looking at} Rb8 18. Nc4 $11) 17... Be7 $17 {Black has a
cramped position} 18. Nd5 Ng5 {Black threatens to win material: Ng5xf3} 19. Qf2
Nxe4 20. Qe3 (20. Qg2 Ng5 $15) 20... Ng5 $17 21. Nxe7+ Qxe7 22. Qb6 (22. Bg2 $5
$17) 22... Bc6 $19 23. Rh5 $2 (23. Rh2 $142 $19) 23... Rac8 0-1

[Event "SapporoAutumn2017"]
[Site "?"]
[Date "2017.10.09"]
[Round "5.1"]
[White "Yamada, Akihiro"]
[Black "Kanamaru, Tomoji"]
[Result "1-0"]
[ECO "C11"]
[WhiteElo "1956"]
[BlackElo "1647"]
[Annotator "Fritz 15 (30s)"]
[PlyCount "27"]

{C11: French: Classical System: 4 e5 and 4 Bg5 dxe4} 1. e4 e6 2. d4 d5 3. Nd2
Nf6 4. e5 Ne4 5. Nxe4 dxe4 6. Be3 b6 (6... c5 7. Bb5+ (7. c3 cxd4 8. Qxd4 Qxd4
9. Bxd4 Nc6 10. Ne2 Bd7 11. g3 Rc8 12. Bg2 Nxd4 13. Nxd4 Rc5 14. O-O-O Rxe5 15.
Rde1 Rc5 16. Bxe4 Rc7 17. Re2 Bc5 18. Rd1 Ke7 19. Bc2 g6 20. f4 Kf6 21. Nf3 Rb8
{Stamenkovic,D (2370)-Lima,D (2496) Brasilia 2011 1/2-1/2 (54)}) 7... Bd7 8.
Bxd7+ Nxd7 9. Ne2 cxd4 10. Qxd4 Qa5+ 11. Nc3 Bc5 12. Qxe4 Bxe3 13. fxe3 Qxe5
14. O-O-O Qxe4 15. Nxe4 Ke7 16. Nd6 Nc5 17. b4 Na4 18. Rhf1 f6 19. Rd3 a5 20.
Rf4 axb4 21. Rc4 {Chabanon,J (2455)-Lepelletier,B (2480) Narbonne 1997 0-1 (48)
}) 7. Bc4 $146 (7. c3 c5 8. Qc2 cxd4 9. O-O-O Qd5 10. Rxd4 Qxa2 11. Qxe4 Qa1+
12. Kc2 Qxf1 13. Qxa8 Bc5 14. Rd1 Qa6 15. Bxc5 Qa4+ 16. Kd2 bxc5 17. Qxb8 O-O
18. Ne2 Ba6 19. Qc7 Qb5 20. Rhe1 Qxb2+ 21. Ke3 Bxe2 {Gavrilov,A (2370)
-Gezaljan,T (2360) Moscow 1989 1-0}) 7... Bb7 8. Qg4 Nc6 {Black threatens to
win material: Nc6xd4} 9. Ne2 Ne7 (9... Na5 10. Bb5+ c6 11. Ba4 $14) 10. Ng3 h5
11. Nxh5 Nf5 12. O-O-O Bd5 (12... Qh4 13. Qxh4 Nxh4 14. g4 $16) 13. Bb3 (13.
Bg5 $5 Qd7 14. Bxd5 exd5 15. f3 $16) 13... Qd7 (13... Qh4 14. Qxh4 Nxh4 15. Nf4
Bxb3 16. axb3 $16) 14. c4 (14. c4 Bb7 15. Kb1 $16) 1-0

[Event "SapporoAutumn2017"]
[Site "?"]
[Date "2017.10.09"]
[Round "5.2"]
[White "Koyahata, Taku"]
[Black "Nishimori, Toshiyuki"]
[Result "0-1"]
[ECO "A34"]
[WhiteElo "1375"]
[BlackElo "1767"]
[Annotator "Fritz 15 (30s)"]
[PlyCount "58"]

{A34: Symmetrical English: 2 Nc3, lines with ...d5} 1. d4 Nf6 2. c4 c5 3. e3
cxd4 4. exd4 g6 5. Nf3 Bg7 6. Nc3 b6 (6... O-O 7. d5 (7. Bd3 d5 8. Ne5 dxc4 9.
Bxc4 Nc6 10. Nxc6 bxc6 11. O-O Qd6 12. f3 Rb8 13. Bb3 Nd5 14. Re1 Rb4 15. Nxd5
cxd5 16. Be3 Qb6 17. Qd2 e6 18. Red1 a5 19. Rab1 Ba6 20. Bc2 Rxb2 21. Qc3 Rb8 {
Usachyi,V (2207)-Heinemann,E (2222) Germany 2010 0-1}) 7... e5 8. Be2 d6 9. O-O
Bg4 10. Be3 Nbd7 11. Rc1 a6 12. h3 Bxf3 13. Bxf3 Rc8 14. Be2 h6 15. b4 Ne8 16.
Na4 f5 17. f3 f4 18. Bf2 e4 19. fxe4 Ne5 20. Nb6 f3 21. gxf3 {Gelashvili,T 
(2622)-Safarli,E (2524) Dubai 2008 1-0 (49)}) 7. Be2 Bb7 8. O-O O-O {Black has
a cramped position} 9. Be3 $146 (9. d5 e6 10. Bg5 d6 11. dxe6 fxe6 12. Qd2 Qe7
13. Rad1 Rd8 14. Rfe1 {1/2-1/2 (14) Kupka,S (2302)-Kadziolka,B (2193) Trinec
2001}) 9... d6 {Consolidates e5} (9... d5 10. c5 $11) 10. b4 {White has an
active position} (10. d5 Nbd7 $14) 10... Nbd7 {White has a very active position
} 11. Rc1 {White has an active position} Rc8 12. Qb3 Ne4 13. Nxe4 Bxe4 14. Qa4
{White threatens to win material: Qa4xa7} Rc7 15. c5 dxc5 16. bxc5 bxc5 17.
dxc5 {White has a new passed pawn: c5. White has an active position. .} Bc6 {
Black threatens to win material: Bc6xa4. In the style of Nimzovich} 18. Qc4 Ne5
19. Nxe5 Bxe5 20. Bf4 Bxf4 21. Qxf4 Rd7 22. Bf3 {White threatens to win
material: Bf3xc6} Qa8 23. Bxc6 {White forks: d7+a8} Qxc6 24. Qc4 Rfd8 25. h3
Rd5 {[%cal Rc6c5,Rd5c5,Gc4c5] The isolani on c5 becomes a target} 26. Rc2 e6
27. Rfc1 Qc7 28. Qb3 $4 {overlooking an easy win} (28. Qe2 $142 $11 {would
hold out}) 28... Rd1+ 29. Rxd1 Rxd1# 0-1

[Event "SapporoAutumn2017"]
[Site "?"]
[Date "2017.10.09"]
[Round "5.3"]
[White "Sugimoto, Koichi"]
[Black "Ito, Katsuhide"]
[Result "1-0"]
[ECO "D09"]
[WhiteElo "1999"]
[BlackElo "1338"]
[Annotator "Fritz 15 (30s)"]
[PlyCount "59"]

{D09: Albin Counter Gambit: Main line with 5 g3} 1. d4 d5 2. c4 e5 3. dxe5 d4
4. Nf3 Nc6 5. g3 Nge7 6. Bg2 Ng6 7. O-O Ngxe5 8. Nxe5 Nxe5 9. Nd2 {White has a
cramped position. White's piece can't move: c1} (9. Qb3 Be7 10. e3 O-O 11. exd4
Qxd4 12. Bf4 Bf6 13. Na3 c6 14. Rfe1 Ng6 15. Bc1 Qb6 16. Qc2 Be6 17. c5 Qc7 18.
Bd2 Rad8 19. Bc3 Ne5 20. Re2 Bd5 21. Rae1 Bxg2 22. Bxe5 Bxe5 23. Kxg2 Bd4 {
Milov,V (2645)-Raetsky,A (2453) Biel 2005 1-0 (46)}) 9... Bc5 $146 (9... Be7
10. Nf3 (10. b3 O-O 11. Bb2 Re8 12. h3 c5 13. Re1 a5 14. f4 Nc6 15. e3 a4 16.
bxa4 dxe3 17. Rxe3 Nd4 18. Nb3 Bf6 19. Rxe8+ Qxe8 20. Nxd4 Qe3+ 21. Kh2 cxd4
22. Qe1 Qxe1 23. Rxe1 Be6 24. f5 Bxc4 {Brunner,L (2485)-Brendel,O (2294)
Switzerland 2004 1/2-1/2}) 10... Nxf3+ 11. Bxf3 O-O 12. Qc2 (12. Bf4 c5 13. Bd5
Bd6 14. Qd2 Bh3 15. Rfe1 Rb8 16. e4 b5 17. e5 Bc7 18. Qc2 Be6 19. Bxe6 fxe6 20.
cxb5 Rxb5 21. b3 Qd5 22. Qe4 h6 23. h4 Qxe4 24. Rxe4 a5 25. Rc1 Ra8 26. Rc4 a4
{Lautier,J (2680)-Raetsky,A (2393) playchess.com INT 2004 1-0 (52)}) 12... c5
13. Bd2 Bh3 14. Rfd1 Qd7 15. Be4 f5 16. Bd5+ Kh8 17. Rab1 Rad8 18. b4 f4 19.
bxc5 fxg3 20. hxg3 Bxc5 21. Rxb7 d3 22. Qxd3 Qxb7 23. Bxb7 Rxd3 24. exd3 {
Savic,M (2213)-Vujic,M (2323) Serbia 2014 0-1}) (9... Be7 10. f4 Nc6 11. Nb3
$11) 10. b4 {White threatens to win material: b4xc5} (10. Nb3 Qe7 $16) 10...
Be7 $14 11. a3 {Covers b4} a5 {Black threatens to win material: a5xb4} 12. Bb2
Be6 (12... O-O 13. c5 $14) 13. c5 c6 {Secures d5} 14. Ne4 Qc7 (14... Nc4 $142
$5 {might be a viable alternative} 15. Bxd4 O-O $16) 15. Qxd4 $16 Bf6 $2 (15...
f6 $142 $16) 16. Nxf6+ $18 gxf6 17. Qf4 (17. f4 {makes it even easier for White
} Nd7 18. f5 Bd5 19. Bxd5 cxd5 20. Qxd5 Ne5 $18) 17... O-O-O (17... Qe7 18. b5
cxb5 19. c6 $18) 18. Qxf6 Nc4 19. Qxh8 Rxh8 20. Bxh8 Bd5 (20... Qe7 21. Bc3 $18
) 21. Bxd5 (21. e4 $5 {and White can already relax} Be6 22. Bf6 Ne5 $18) 21...
cxd5 22. Rfd1 Qd8 (22... Qd7 {cannot undo what has already been done} 23. Rd3
$18) 23. Bc3 Kc7 (23... Qd7 {doesn't change the outcome of the game} 24. Rd3
$18) 24. e4 Nxa3 (24... Qc8 {no good, but what else?} 25. exd5 Qf5 $18) 25.
Rxa3 axb4 26. Bxb4 Qg5 27. exd5 Qg4 28. Ba5+ Kb8 29. Rad3 (29. Re1 Kc8 30. c6
bxc6 31. dxc6 Qd7 32. cxd7+ Kxd7 33. Rd3+ Kc6 34. Rc1+ Kb7 35. Rd6 Kb8 36. Rc7
h5 37. Rd8#) 29... f5 30. d6 (30. d6 b6 31. d7 Qg8 32. d8=Q+ Qxd8 33. Rxd8+ Kc7
34. cxb6+ Kb7 35. R1d7+ Ka6 36. b7 Kxa5 37. b8=Q Ka4 38. Ra7#) 1-0

[Event "SapporoAutumn2017"]
[Site "?"]
[Date "2017.10.09"]
[Round "5.4"]
[White "Yoshii, Yukihiko"]
[Black "Nakamura, Mitsuru"]
[Result "1-0"]
[ECO "E94"]
[WhiteElo "1883"]
[BlackElo "1000"]
[Annotator "Fritz 15 (30s)"]
[PlyCount "45"]

{E94: King's Indian: Classical: 6 Be2 e5 7 0-0: Various Black 7th moves} 1. c4
Nf6 2. d4 g6 3. Nc3 Bg7 4. e4 O-O 5. Nf3 d6 6. Be2 e5 7. O-O Bd7 $146 (7... Nh5
8. g3 (8. Re1 Nf4 9. Bf1 Bg4 10. d5 f5 11. h3 fxe4 12. hxg4 exf3 13. Qxf3 Nd7
14. Qd1 Qh4 15. g3 Qh6 16. gxf4 exf4 17. Qf3 Bxc3 18. Qxc3 Ne5 19. f3 Qh4 20.
Bg2 h5 21. gxh5 Rf5 22. Re4 Raf8 {Maksimenko,A (2545)-Ilincic,Z (2565) Borovo
1997 0-1 (34)}) (8. dxe5 dxe5 9. Be3 Nc6 10. Qxd8 Nxd8 11. Nb5 Ne6 12. Nxa7
Nef4 13. Rfe1 Nxe2+ 14. Rxe2 Be6 15. Rc2 c6 16. Ng5 Rfd8 17. Nxe6 fxe6 18. Bb6
Rd4 19. f3 Nf6 20. a4 Nd7 21. c5 Nb8 22. Kf2 Na6 {Pelts,P (2260)-Karklins,A 
(2310) Lincolnwood 1990 1-0 (44)}) 8... exd4 (8... Bh3 9. Re1 exd4 10. Nxd4 Nf6
11. Bg5 Re8 12. Qd2 Nc6 13. Nxc6 bxc6 14. Qf4 Qe7 15. c5 Qe5 16. cxd6 cxd6 17.
Qxe5 Rxe5 18. Bf4 Ree8 19. Bf3 Rad8 20. Rad1 d5 21. exd5 Nxd5 22. Rxe8+ Rxe8
23. Nxd5 {Tratar,M (2395)-Mohr,G (2480) Austria 1998 1/2-1/2}) 9. Nxd4 Bh3 10.
Bxh5 Bxf1 11. Kxf1 Bxd4 12. Qxd4 Nc6 13. Qd1 gxh5 14. Nd5 f6 15. Bh6 Rf7 16.
Qxh5 Ne5 17. Ne3 Qd7 18. b3 b5 19. Rc1 Re8 20. Kg2 bxc4 21. bxc4 Ng6 22. f3 {
Pelts,P (2295)-Karklins,A (2310) Illinois 1989 0-1 (34)}) (7... h6 8. Rb1 Nc6
9. d5 Ne7 10. Nd2 g5 11. Re1 Nd7 12. Bg4 a5 13. Nf1 f5 14. Bxf5 Nxf5 15. exf5
Rxf5 16. Ne4 Rf7 17. Nfg3 b6 18. Qh5 Nf6 19. Nxf6+ Qxf6 20. Be3 Bd7 21. Rbc1
Re8 22. b3 {Llanos,G (2385)-Aparicio,A (2330) Buenos Aires 1991 1-0 (51)}) (
7... exd4 8. Nxd4 Re8 9. f3 $11) 8. dxe5 $14 dxe5 9. Nxe5 Ne8 $2 (9... Nxe4 $5
{must definitely be considered} 10. Nxe4 Bxe5 $14) 10. Nxd7 (10. f4 c6 $16)
10... Nxd7 11. Bg4 (11. f3 Bxc3 12. bxc3 Ng7 $16) 11... Nef6 12. Be2 Qe7 (12...
Ne8 13. f3 Bxc3 14. bxc3 Ng7 $16) 13. Qc2 $16 c6 14. Bg5 {White has an active
position} (14. Be3 Nc5 15. f3 Nfd7 $16) 14... Qc5 (14... Nc5 $142 $5 $14 {
is an interesting idea}) 15. Be3 $16 Qd6 (15... Qe7 16. f4 $16) 16. Rad1 $18
Qc7 (16... Qe6 17. f4 $18) 17. f4 b6 (17... Rfd8 18. e5 Ne8 19. Ne4 $18) 18. e5
Ne8 19. Ne4 {[%cal Yc4c5] White prepares c5} f5 (19... Bh6 20. Qb3 $18) 20. Ng5
Qb7 (20... Nxe5 {doesn't get the bull off the ice} 21. fxe5 Qxe5 22. Bc1 $18)
21. c5 (21. Qb3 $142 {keeps an even firmer grip} Kh8 22. c5 $18) 21... Nc7 (
21... Nxc5 {doesn't get the cat off the tree} 22. Bxc5 bxc5 23. Bc4+ Kh8 24.
Ne6 $18) 22. Bf3 (22. Rxd7 $142 {and White takes home the point} Qc8 23. Bc4+
Nd5 24. Rxd5 cxd5 25. Bxd5+ Kh8 $18) 22... b5 (22... Nxe5 {otherwise it's
curtains at once} 23. fxe5 Nd5 24. Bxd5+ cxd5 $18) 23. Rxd7 (23. Rxd7 Kh8 24.
Qd3 $18) 1-0

