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Subject: Big Book Of Combinations (long post)

Author: Jouni Uski

Date: 23:33:19 09/16/01


Book has originally 1000 positions, but Steve Maughan has removed all, which
were too easy for computers resulting 190. I have further reduced a lot of
inaccurete positions to finally have only 42 positions. I don't claim, that
indicated move is only winning, but probably the best.Here they all in PGN:

[Event "Moscow"]
[Site "?"]
[Date "1935.??.??"]
[Round "?"]
[White "Lasker"]
[Black "Pirc"]
[Result "1-0"]
[Annotator "#116*"]
[SetUp "1"]
[FEN "r1b1kb1r/1p4pp/p2ppn2/8/2qNP3/2N1B3/PPP3PP/R2Q1RK1 w kq - 0 1"]
[PlyCount "17"]
[EventDate "1935.??.??"]

1. Rxf6 gxf6 2. Qh5+ Kd8 3. Qf7 Be7 4. Nf5 Qc7 5. Na4 $1 Rf8 6. Qxh7 exf5 7.
Bb6 Re8 8. Bxc7+ Kxc7 9. exf5 $18 1-0

[Event "Hamburg"]
[Site "?"]
[Date "1946.??.??"]
[Round "?"]
[White "Saemisch"]
[Black "Ahues"]
[Result "1-0"]
[Annotator "#160*"]
[SetUp "1"]
[FEN "1r5k/2q2p1p/p2p3B/5PQ1/n1p5/2b4P/PrB3P1/2R1R1K1 w - - 0 1"]
[PlyCount "11"]
[EventDate "1946.??.??"]

1. Re5 f6 2. Qxf6+ Kg8 3. Qg5+ Kh8 4. Re7 Rg8 5. Rxc7 Rxg5 6. Bxg5 1-0

[Event "Mannheim"]
[Site "?"]
[Date "1948.??.??"]
[Round "?"]
[White "Schuppler"]
[Black "Heinicke"]
[Result "1-0"]
[Annotator "#175*"]
[SetUp "1"]
[FEN "2kr3r/pRp3q1/2Pppn2/4p2p/B2bP1p1/7P/2P2PP1/2BQ1RK1 w - - 0 1"]
[PlyCount "21"]
[EventDate "1948.??.??"]

1. Bh6 Rdg8 (1... Qxh6 2. Qb1 Bxf2+ (2... Bb6 3. Qb5 Nd7 4. Rxa7 Nb8 5. Ra8
Rdg8 6. Rxb8+ Kxb8 7. Qa6 Bxf2+ 8. Kh1 Qc1 9. Qb7#) 3. Rxf2 Qc1+ 4. Qxc1 Rdg8
5. Qb2 Kd8 6. Rxa7 Nd7 7. cxd7 gxh3 8. Qb8+ Ke7 9. d8=Q+ Rxd8 10. Qxc7+ Rd7 11.
Qxd7#) 2. Bxg7 Rxg7 3. Qd3 Kd8 4. Rb8+ Ke7 5. Rxh8 Bb6 6. Qa6 Rg8 7. Rxg8 Nxg8
8. Qc8 Nf6 9. Bb3 d5 10. exd5 exd5 11. c4 $18 1-0

[Event "Soviet Union"]
[Site "?"]
[Date "1950.??.??"]
[Round "?"]
[White "Aronin"]
[Black "Aratovsky"]
[Result "1-0"]
[Annotator "#192"]
[SetUp "1"]
[FEN "r2r2k1/ppqbbppp/4pn2/6N1/n1P4P/3B1N2/PP2QPP1/1KBR3R w - - 0 1"]
[PlyCount "17"]
[EventDate "1950.??.??"]

1. Nxh7 Nxh7 2. Bxh7+ Kxh7 3. Ng5+ Kg8 4. Qh5 Bf6 5. Qxf7+ Kh8 6. h5 $1 Nc3+ (
6... e5 7. Rd3 Bf5 8. Qxc7 Bxd3+ 9. Ka1 Rac8) 7. bxc3 Qb6+ 8. Bb2 Bxg5 9. Rxd7
1-0

[Event "Soviet Union"]
[Site "?"]
[Date "1950.??.??"]
[Round "?"]
[White "Averbakh"]
[Black "Kayem"]
[Result "1-0"]
[Annotator "#193*"]
[SetUp "1"]
[FEN "r2rn3/1p3pk1/p1pNn1pp/q3P3/P7/1PN4P/2QR1PP1/3R2K1 w - - 0 1"]
[PlyCount "19"]
[EventDate "1950.??.??"]

1. Nxf7 Kxf7 2. Rd7+ Rxd7 3. Rxd7+ Kg8 4. Qxg6+ N6g7 5. Ne4 Qxe5 6. Rf7 Qa1+ (
6... Rd8 7. Nf6+ Qxf6 8. Rxf6 Nxf6 9. Qxf6 $18) 7. Kh2 Qe5+ 8. f4 Qxe4 9. Rxg7+
Nxg7 10. Qxe4 $18 1-0

[Event "Budapest"]
[Site "?"]
[Date "1950.??.??"]
[Round "?"]
[White "Keres"]
[Black "Kotov"]
[Result "1-0"]
[Annotator "#199"]
[SetUp "1"]
[FEN "r1b1kb1r/1p1n1ppp/p2ppn2/6BB/2qNP3/2N5/PPP2PPP/R2Q1RK1 w kq - 0 1"]
[PlyCount "17"]
[EventDate "1950.??.??"]

1. Nxe6 Qxe6 2. Nd5 Nxd5 (2... Kd8 3. Bg4 Qe5 4. f4 Qxb2 5. Bxd7 Bxd7 6. Rb1
Qa3 7. Qd4 Qc5) 3. exd5 Qf5 4. Qe1+ Ne5 5. f4 g6 (5... Kd7 6. fxe5 Qxg5 7.
Rxf7+ Be7 8. exd6 Kxd6 9. Qb4+ Kc7 10. Rxe7+ Kb8 11. Qd6+ Ka7 12. Qc5+ Kb8 13.
Bf3 $18) 6. fxe5 Qxg5 7. exd6+ Be7 (7... Be6 8. dxe6 Qc5+ 9. Kh1 Bxd6 10. exf7+
$18) 8. Bf3 f5 9. Rd1 $18 1-0

[Event "Soviet Championship"]
[Site "?"]
[Date "1950.??.??"]
[Round "?"]
[White "Tolush"]
[Black "Sokolsky"]
[Result "1-0"]
[Annotator "#211"]
[SetUp "1"]
[FEN "2rr2k1/4bppp/p1n1p3/3q4/1p1P2N1/2P3R1/P3QPPP/2B2RK1 w - - 0 10"]
[PlyCount "41"]
[EventDate "1950.??.??"]

10. Nh6+ Kf8 11. Rxg7 Kxg7 12. Qg4+ Bg5 13. c4 Qa5 14. d5 f6 15. Bxg5 Rf8 16.
Bxf6+ Kxf6 17. Re1 e5 18. h4 Ke7 19. Qe6+ Kd8 20. Qd6+ Ke8 21. dxc6 Rf7 22. c5
Qc7 23. Rxe5+ Re7 24. Qd5 Rxe5 25. Qg8+ Ke7 26. Qf7+ Kd8 27. Qf8+ Re8 28. Nf7+
Qxf7 29. Qd6+ Qd7 30. Qxd7# 1-0

[Event "Soviet Union"]
[Site "?"]
[Date "1952.??.??"]
[Round "?"]
[White "Panov"]
[Black "Taimanov"]
[Result "1-0"]
[Annotator "#224*"]
[SetUp "1"]
[FEN "3r2k1/p6p/b2r2p1/2qPQp2/2P2P2/8/6BP/R4R1K w - - 0 1"]
[PlyCount "59"]
[EventDate "1952.??.??"]

1. Rxa6 {Excellent test for computers to determine if they see the value of
creating the central passed pawns} 1... Rxa6 2. d6 Qxe5 (2... Qxd6 3. Bd5+ Kf8
4. Qh8+ Ke7 5. Qxh7+ Ke8 6. Qf7#) 3. fxe5 Ra5 4. Bd5+ Kf8 5. Rb1 g5 6. h4 h6 7.
Rb7 Ra1+ 8. Kg2 Ra2+ 9. Kf3 Ra3+ 10. Ke2 Ra2+ 11. Kd3 Ra3+ 12. Kd4 Ra1 13. Rf7+
Ke8 14. Rh7 Rd1+ 15. Kc5 Rc8+ 16. Bc6+ Rxc6+ 17. Kxc6 Kf8 18. e6 Kg8 19. Rxh6
Kg7 20. hxg5 Rc1 21. e7 Rxc4+ 22. Kd5 Re4 23. d7 Re1 24. d8=Q Rd1+ 25. Ke6 Re1+
26. Kd7 Rd1+ 27. Rd6 Rxd6+ 28. Kxd6 a5 29. e8=Q a4 30. Qde7# 1-0

[Event "Hamburg"]
[Site "?"]
[Date "1956.??.??"]
[Round "?"]
[White "Keres"]
[Black "Unzicker"]
[Result "1-0"]
[Annotator "#258"]
[SetUp "1"]
[FEN "r5k1/pn1q1rpp/2pp4/5R1N/bP6/4BQ2/P4PPP/2R3K1 w - - 0 1"]
[PlyCount "27"]
[EventDate "1956.??.??"]

1. Nxg7 Rxg7 2. Bh6 Qe7 (2... Re8 3. h4 Rf7 4. Rg5+ Kh8 5. Qc3+ Re5 6. f4 Qe6
7. fxe5 d5 8. Qg3 $18) 3. Bxg7 Qxg7 4. Rf4 Qb2 5. Re1 a5 6. Rfe4 c5 7. Qf5 Qc3
8. Re7 Qxe1+ 9. Rxe1 Re8 10. Qd5+ Kf8 11. Rxe8+ Kxe8 12. Qe4+ Kd8 13. bxa5 c4
14. Qxb7 $18 1-0

[Event "Soviet Union"]
[Site "?"]
[Date "1959.??.??"]
[Round "?"]
[White "Gurgenidze"]
[Black "Klovan"]
[Result "1-0"]
[Annotator "#298"]
[SetUp "1"]
[FEN "r2qr3/2p1b1pk/p5pp/1p2p3/nP2P1P1/1BP2RP1/P3QPK1/R1B5 w - - 0 1"]
[PlyCount "18"]
[EventDate "1959.??.??"]

1. Bxh6 gxh6 2. Rf7+ Kh8 3. Rh1 Bg5 4. Rd1 Nxc3 5. Rxd8 Nxe2 6. Rdd7 Re7 7.
Rfxe7 Bxe7 8. Rxe7 Nd4 9. Bf7 g5 1-0

[Event "Stockholm"]
[Site "?"]
[Date "1962.??.??"]
[Round "?"]
[White "Stein"]
[Black "Portisch"]
[Result "1-0"]
[Annotator "#361"]
[SetUp "1"]
[FEN "r4r1k/2q2ppp/1np1b3/p1b1pNB1/2B1P3/8/PPP1Q1PP/3R1R1K w - - 0 1"]
[PlyCount "25"]
[EventDate "1962.??.??"]

1. Nxg7 Bxc4 2. Bf6 Be7 3. Qf3 Bxf6 4. Qxf6 Qe7 5. Qxe7 Bd5 (5... Nd5 6. exd5
Rg8 7. Nh5 Rg7 8. Rxf7 Rxf7 9. Qxf7 Rg8 10. Qf6+ Rg7 11. Qxg7#) 6. exd5 Nd7 (
6... cxd5 7. Ne8 Nd7 8. Rxf7 Rxf7 9. Qxf7 Rxe8 10. Qxe8+ Kg7 11. Qxd7+ Kg6 12.
Qe6+ Kh5 13. Rxd5 a4 14. Rxe5+ Kh4 15. g3#) (6... e4 7. dxc6 Nd5 8. Rxd5 Rg8 9.
Nf5 Rg6 10. Rd8+ Rxd8 11. Qxd8+ Rg8 12. Qf6+ Rg7 13. Qxg7#) 7. dxc6 Nc5 8. Nf5
Ne4 9. Qxe5+ f6 10. Qe7 Rg8 11. Rd7 Nf2+ 12. Rxf2 a4 13. Qxh7# 1-0

[Event "Finland"]
[Site "?"]
[Date "1966.??.??"]
[Round "?"]
[White "Book"]
[Black "Westerinen"]
[Result "1-0"]
[Annotator "#442*"]
[SetUp "1"]
[FEN "r2qrbk1/5p1p/2b1pPp1/2np2P1/ppPpPB1N/3P1R2/PP4B1/1R2Q1K1 w - - 0 1"]
[PlyCount "37"]
[EventDate "1966.??.??"]

1. Nxg6 dxe4 2. Qh4 {A tough move to find} 2... Bg7 3. Rh3 h6 4. gxh6 fxg6 5.
hxg7 Kf7 6. g8=Q+ Rxg8 7. Qh7+ Kf8 8. Bh6+ Ke8 9. f7+ Kd7 10. fxg8=Q+ Kc8 11.
Bf4 e5 12. Bxe5 Bd7 13. Qxd8+ Kxd8 14. Qg8+ Be8 15. Rh8 Kc8 16. Qxe8+ Kb7 17.
Rh7+ Nd7 18. Qxd7+ Ka6 19. Qb5# 1-0

[Event "Pecs"]
[Site "?"]
[Date "1968.??.??"]
[Round "?"]
[White "Bilek"]
[Black "Matulovic"]
[Result "1-0"]
[Annotator "#503"]
[SetUp "1"]
[FEN "3r4/2n1qr2/pkp2pp1/N1p3n1/Q3P1B1/2PP2Pp/1P5P/K2R1R2 w - - 0 1"]
[PlyCount "21"]
[EventDate "1968.??.??"]

1. Qxc6+ Kxa5 2. Rf2 c4 3. dxc4 Qa3+ 4. bxa3 Rb8 5. Rxf6 Nge6 6. Rxe6 Rb5 7.
cxb5 axb5 8. Qb6+ Ka4 9. Rd4+ Kb3 10. Bd1+ Kxa3 11. Qa5# 1-0

[Event "Vinkovci"]
[Site "?"]
[Date "1968.??.??"]
[Round "?"]
[White "Fischer"]
[Black "Minic"]
[Result "1-0"]
[Annotator "#506*"]
[SetUp "1"]
[FEN "r4rk1/pp3ppp/2p4q/2P5/1b1P4/1B3NPb/PP2Q2P/R4RK1 w - - 0 1"]
[PlyCount "24"]
[EventDate "1968.??.??"]

1. Ne5 Bxf1 2. Rxf1 Qd2 (2... Bd2 {Move played in the game} 3. Rf3 Rad8 $4 4.
Nxf7 Rxf7 5. Qe7) 3. Qe4 Kh8 4. Nxf7+ Rxf7 5. Rxf7 Qc1+ 6. Kg2 Qd2+ 7. Rf2 Qg5
8. h4 Qg6 9. Rf5 Qe8 10. Re5 Qf8 11. Re7 Bd2 12. Bc2 Qg8 $18 1-0

[Event "Malaga"]
[Site "?"]
[Date "1968.??.??"]
[Round "?"]
[White "Madina"]
[Black "Marovic"]
[Result "1-0"]
[Annotator "#517"]
[SetUp "1"]
[FEN "8/p2bRpkp/5np1/3p2Q1/p2P4/P4BNP/1qr2PP1/6K1 w - - 0 1"]
[PlyCount "15"]
[EventDate "1968.??.??"]

1. Qe5 Qc1+ 2. Kh2 Bc6 3. Nh5+ gxh5 4. Bxh5 Be8 5. Rxe8 Rxf2 6. Qg3+ Kh6 7.
Qxf2 Nxe8 8. Bxf7 1-0

[Event "Palma De Mallorca"]
[Site "?"]
[Date "1969.??.??"]
[Round "?"]
[White "Bobotsov"]
[Black "Penrose"]
[Result "1-0"]
[Annotator "#529"]
[SetUp "1"]
[FEN "r3r1k1/pp3pp1/3p4/2q4p/2P5/1PB2Q1P/n4PP1/3R1RK1 w - - 0 1"]
[PlyCount "15"]
[EventDate "1969.??.??"]

1. Bxg7 Kxg7 2. Rd5 Qb6 (2... Qb4 3. Rg5+ Kf8 4. Rf5 Ke7 5. Rxf7+ Kd8 6. Qf5
Re7 7. Qf6 d5 8. c5) (2... Qc6 3. Rg5+ Kf8 4. Qf6 Re6 5. Qh8+ Ke7 6. Qxa8 Nc3
7. Rg8 Kf6 8. Qd8+ Re7 9. Re1 Qd7 10. Rxe7 Qxe7 11. Qxe7+ Kxe7 12. Ra8) 3. Rg5+
Kf8 4. Qxh5 Nc3 5. Rf5 f6 (5... Ne2+ 6. Kh2 f6 7. Rxf6+ Ke7 8. Qf7+ Kd8 9. Rd1
Nd4 10. Qd5) 6. Qh8+ Ke7 7. Qxf6+ Kd7 8. Qxc3 1-0

[Event "Dresden"]
[Site "?"]
[Date "1969.??.??"]
[Round "?"]
[White "Farago"]
[Black "Nordstrom"]
[Result "1-0"]
[Annotator "#537"]
[SetUp "1"]
[FEN "2r1r1k1/pb1n1pp1/1p1qpn1p/4N1B1/2PP4/3B4/P2Q1PPP/3RR1K1 w - - 0 1"]
[PlyCount "9"]
[EventDate "1969.??.??"]

1. Bxh6 gxh6 2. Nxd7 Qxd7 3. Qxh6 Qc6 (3... Ng4 4. Qg5+ Kf8 5. Qxg4) 4. f3 e5
5. d5 1-0

[Event "Dresden"]
[Site "?"]
[Date "1969.??.??"]
[Round "?"]
[White "Kupreichik"]
[Black "Babev"]
[Result "1-0"]
[Annotator "#542"]
[SetUp "1"]
[FEN "rqbn1rk1/1p3ppp/p3p3/8/4NP2/5Q2/PPP1B1PP/1K1R3R w - - 0 1"]
[PlyCount "24"]
[EventDate "1969.??.??"]

1. Nf6+ gxf6 2. Qg4+ Kh8 3. Qh4 Kg7 (3... Rg8 4. Qxf6+ Rg7 5. Rxd8#) 4. Rd3 Re8
(4... Rg8 5. Rg3+ Kf8 6. Qh6+ Rg7 7. Rxg7 $18) 5. Rh3 h5 (5... Rh8 6. Qh6+ Kg8
7. Rg3#) 6. Qxh5 Qxf4 7. Rf1 Qg5 8. Rg3 Qg6 9. Qh4 f5 10. Bh5 Nc6 11. Bxg6 fxg6
12. Qg5 Ne7 $18 1-0

[Event "Soviet Union"]
[Site "?"]
[Date "1969.??.??"]
[Round "?"]
[White "Tukmakov"]
[Black "Minenkov"]
[Result "1-0"]
[Annotator "#552"]
[SetUp "1"]
[FEN "r3r1k1/p3bppp/q1b2n2/5Q2/1p1B4/1BNR4/PPP3PP/2K2R2 w - - 0 1"]
[PlyCount "17"]
[EventDate "1969.??.??"]

1. Rg3 Bd7 (1... bxc3 2. Rxg7+ Kxg7 3. Qg5+ Kf8 4. Qh6+ Kg8 5. Bxf7+ Kxf7 6.
Rxf6+ Bxf6 7. Qxf6+ Kg8 8. Qg7#) 2. Rxg7+ Kxg7 3. Qg5+ Kf8 4. Qh6+ Kg8 5. Ne2
Bg4 6. Rxf6 Bxf6 7. Bxf6 Qxf6 8. Qxf6 Bh5 9. Nd4 $18 1-0

[Event "Lugano"]
[Site "?"]
[Date "1970.??.??"]
[Round "?"]
[White "Olafsson"]
[Black "Unzicker"]
[Result "1-0"]
[Annotator "#574"]
[SetUp "1"]
[FEN "1q1r3k/3P1pp1/ppBR1n1p/4Q2P/P4P2/8/5PK1/8 w - - 0 1"]
[PlyCount "33"]
[EventDate "1970.??.??"]

1. Rxf6 $3 Qxe5 2. fxe5 gxf6 3. exf6 Kg8 (3... b5 4. axb5 axb5 5. Bxb5) 4. Kf3
Kf8 5. Ke4 Kg8 6. Ke5 Kf8 7. Kd6 Kg8 8. Ke7 Rb8 9. Bd5 b5 10. Bxf7+ Kh7 11.
Bg6+ Kg8 12. Be8 Kh7 13. f7 Rb6 14. f8=Q bxa4 15. Bf7 Re6+ 16. Kxe6 a3 17. Qg8#
1-0

[Event "Athens"]
[Site "?"]
[Date "1971.??.??"]
[Round "?"]
[White "Wach"]
[Black "Castro"]
[Result "1-0"]
[Annotator "#616"]
[SetUp "1"]
[FEN "4rrk1/2pn2pb/p1p1qp2/1pb1pN2/P3P1PN/1P1P4/1BP2PK1/R2Q3R w - - 0 1"]
[PlyCount "11"]
[EventDate "1971.??.??"]

1. Nxg7 Kxg7 2. Nf5+ Kg8 3. Rxh7 Kxh7 (3... Rf7 4. Rxf7 Kxf7 5. Qh1 Rb8 6. Qh7+
Kf8 $18) 4. Qh1+ Kg8 5. Qh5 Qxf5 6. Qxf5 $18 1-0

[Event "Belgium"]
[Site "?"]
[Date "1972.??.??"]
[Round "?"]
[White "Renards"]
[Black "De Claire"]
[Result "1-0"]
[Annotator "#633"]
[SetUp "1"]
[FEN "r3kbr1/pb1n1p2/2q1p2p/2P1P3/1p3Q1B/1Pp2N2/P3BPPP/R2R2K1 w q - 0 1"]
[PlyCount "33"]
[EventDate "1972.??.??"]

1. Rxd7 Qxd7 2. Rd1 Bd5 (2... Qc6 3. Qf6 Rg5 4. Bxg5 hxg5 5. Bb5 c2 (5... Qxb5
6. Nxg5 Qd7 7. Rxd7 Kxd7 8. Qxf7+ Kc6 9. Qf3+ Kc7 10. Nxe6+ Kd7 11. Qxb7+ Kxe6
12. Qxa8 $18) 6. Bxc6+ Bxc6 7. Re1 $18) 3. Rxd5 $3 exd5 (3... Qxd5 4. Bb5+ Qd7
5. Bxd7+ Kxd7 6. Qxf7+ Kc6 7. Nd4+ Kd5 8. Qd7+ Bd6 9. Qxd6+ Ke4 10. Nxe6 Raf8
11. Nxf8 Rxf8 12. Qxf8 c2 13. Qf3+ Kd4 14. Qe3+ Kd5 15. Qd2+ Kxe5 16. Qd6+ Kf5
17. Qd5+ Kg6 18. Qe6+ Kg7 19. Bf6+ Kg6 20. Ba1+ Kg5 21. Qf6+ Kg4 22. f3+ Kh5
23. g4#) 4. e6 fxe6 5. Ne5 Rxg2+ 6. Kxg2 Qg7+ 7. Kh1 Be7 8. Bxe7 Qxe7 9. Bh5+
Kd8 10. Nc6+ Kc8 11. Nxe7+ Kb7 12. Qd6 Rg8 13. c6+ Kb6 14. c7+ Ka5 15. Qc5+ Ka6
16. Be2+ Kb7 17. Qc6# 1-0

[Event "Nice"]
[Site "?"]
[Date "1974.??.??"]
[Round "?"]
[White "Hartston"]
[Black "Portisch"]
[Result "1-0"]
[Annotator "#667*"]
[SetUp "1"]
[FEN "r1br2k1/p1q2pp1/4p1np/2ppP2Q/2n5/2PB1N2/2P2PPP/R1B1R1K1 w - - 0 1"]
[PlyCount "11"]
[EventDate "1974.??.??"]

1. Bxh6 gxh6 2. Qxh6 Qe7 3. Ng5 Ncxe5 4. Rxe5 Qf6 5. Re3 Qg7 6. Nxf7 $18 1-0

[Event "Soviet Union"]
[Site "?"]
[Date "1975.??.??"]
[Round "?"]
[White "Fatalibekov"]
[Black "Medyanikova"]
[Result "1-0"]
[Annotator "#695*"]
[SetUp "1"]
[FEN "1rbqnr2/5p1k/p1np3p/1p1Np3/4P2P/1Q2B3/PPP1BP2/2KR3R w - - 0 1"]
[PlyCount "37"]
[EventDate "1975.??.??"]

1. Bxh6 Kxh6 2. Qf3 Nf6 (2... Ng7 3. Nf6 Qb6 4. Rxd6 Ne7 5. Rxb6 Ne6 6. Ne8 Kh7
7. Rg1 Ng6 8. Qh5+ Kg8 9. Rxg6+ fxg6 10. Qxg6+ Kh8 11. Rxe6 Rb7 12. Nf6 Bxe6
13. Qh6+ Rh7 14. Qxh7#) 3. Nxf6 Ne7 4. Qh5+ Kg7 5. Qg5+ Ng6 6. h5 Rh8 7. hxg6
fxg6 8. Rxh8 Qxh8 9. Bh5 Be6 10. Bxg6 Kf8 11. Nh7+ Qxh7 12. Qf6+ Bf7 13. Qxd6+
Kg7 14. Qxe5+ Kf8 15. Qxb8+ Kg7 16. Qe5+ Kh6 17. Rh1+ Kxg6 18. Rg1+ Kh6 19.
Qg5# 1-0

[Event "Romania"]
[Site "?"]
[Date "1977.??.??"]
[Round "?"]
[White "Ghinda"]
[Black "Ciocaltea"]
[Result "1-0"]
[Annotator "#770"]
[SetUp "1"]
[FEN "r1b1k1nr/3n1p1p/1qpBp1p1/pp2b3/4PN2/PBN2Q2/1PP2PPP/2KR3R w kq - 0 1"]
[PlyCount "39"]
[EventDate "1977.??.??"]

1. Nxe6 fxe6 2. Bxe6 Bf6 3. e5 Bg5+ 4. Kb1 Nh6 5. Ne4 Bh4 6. Qf4 Qd8 7. Qxh6
Nb6 8. Bxc8 Ra7 9. Bc5 Nxc8 10. Rxd8+ Bxd8 11. Bxa7 Be7 12. Qg7 Rf8 13. Nf6+
Rxf6 14. exf6 Bxf6 15. Qxf6 a4 16. Re1+ Kd7 17. Qf7+ Kd6 18. Re6+ Kd5 19. Re7+
Kd6 20. Qe6# 1-0

[Event "Soviet Championship"]
[Site "?"]
[Date "1979.??.??"]
[Round "?"]
[White "Geller"]
[Black "Anikayev"]
[Result "1-0"]
[Annotator "#832"]
[SetUp "1"]
[FEN "r4rk1/1pqbbN1p/p2pp1p1/6Pn/P3P3/2N1B3/1PP2Q1P/R4RK1 w - - 0 1"]
[PlyCount "17"]
[EventDate "1979.??.??"]

1. Nd5 exd5 2. Nh6+ Kg7 3. Qf7+ Rxf7 4. Rxf7+ Kh8 5. Bd4+ Bf6 6. Rxf6 Ng7 7.
Rf7 Qc5 8. Bxc5 dxc5 9. Rxd7 $18 1-0

[Event "Munich"]
[Site "?"]
[Date "1979.??.??"]
[Round "?"]
[White "Spassky"]
[Black "Pfleger"]
[Result "1-0"]
[Annotator "#838*"]
[SetUp "1"]
[FEN "r3r1k1/1bqn1ppp/1pp2p2/8/3P4/1B4N1/PP3PPP/R2QR1K1 w - - 0 1"]
[PlyCount "17"]
[EventDate "1979.??.??"]

1. Bxf7+ Kxf7 2. Qh5+ Kf8 3. Qxh7 g6 4. Qxg6 Qf4 5. Nf5 Qg5 6. Qh7 c5 7. g3 Re4
8. h4 Qxf5 9. Qxf5 $18 1-0

[Event "Argentina"]
[Site "?"]
[Date "1982.??.??"]
[Round "?"]
[White "Campora"]
[Black "Morovic"]
[Result "1-0"]
[Annotator "#868!!"]
[SetUp "1"]
[FEN "r1bq1rk1/p3bppp/2p1p3/2npP3/5B2/3B4/PPPN1PPP/R2QR1K1 w - - 0 1"]
[PlyCount "33"]
[EventDate "1982.??.??"]

1. Bxh7+ $3 {One of the hardest positions for computers in the book - not
found by any program in a reasonable timeframe (3 hours)} 1... Kxh7 2. Qh5+ Kg8
3. Re3 f5 4. Rh3 Qe8 (4... Rb8 5. Qh7+ Kf7 6. Bh6 Ke8 7. Bxg7 Rxb2 8. Bxf8 Bxf8
9. Qg6+ Kd7 10. Rh8 Kc7 11. Nb3 Nd7 12. Nd4 Kb7 13. Nxe6 Qb6 14. h3 $18) (4...
Ne4 5. Qh7+ Kf7 6. Nxe4 fxe4 7. Bh6 Ke8 8. Bxg7 Kd7) 5. Qh7+ Kf7 6. Rg3 Rg8 7.
Bh6 Bf8 8. b4 Nb7 9. Nc4 Ke7 (9... dxc4 10. Rd1 Nd6 11. Rxd6 Ke7 12. Bg5+ Kf7
13. Bf6 Rh8 14. Rxg7+ Bxg7 15. Qxg7#) 10. Bg5+ Kd7 11. Qxg8 dxc4 12. Bh4 Kc7
13. Rxg7+ Bd7 14. Rh7 Bxb4 15. Qxe8 Rxe8 16. Rd1 Nc5 17. Be7 $18 1-0

[Event "USA"]
[Site "?"]
[Date "1984.??.??"]
[Round "?"]
[White "Gurevich, D."]
[Black "Devico"]
[Result "1-0"]
[Annotator "#888!"]
[SetUp "1"]
[FEN "rn5r/1b1kb2p/pq2pp2/1p1n2BQ/3NN3/3B4/PP3PPP/R4RK1 w - - 0 1"]
[PlyCount "13"]
[EventDate "1984.??.??"]

1. Nxf6+ $1 {Junior 5 solves in 25 secs Fritz 5.32 > 60 secs} 1... Nxf6 2. Bxf6
Rg8 3. g3 Bxf6 4. Qf7+ Be7 5. Rfd1 Bd5 6. Nxe6 Qd6 7. Qxg8 $18 1-0

[Event "Thessaloniki"]
[Site "?"]
[Date "1984.??.??"]
[Round "?"]
[White "Rufenacht"]
[Black "Mattheus"]
[Result "1-0"]
[Annotator "#894"]
[SetUp "1"]
[FEN "r1b2r1k/5ppp/p1qppb1B/8/4P3/1B6/PpP1QP1P/1K1R2R1 w - - 0 1"]
[PlyCount "8"]
[EventDate "1984.??.??"]

1. e5 {Fritz 5.32 solves in 5 secs} 1... gxh6 (1... Bxe5 2. Qxe5 f6 3. Bxg7+
Kg8 4. Bxf6+ Qg2 5. Rxg2+ Kf7 6. Rg7+ Ke8 7. Ba4+ Bd7 8. Bxd7#) 2. exf6 Bb7 3.
Qh5 Qf3 4. Qxh6 Rg8 $14 1-0

[Event "Stary Smokovec"]
[Site "?"]
[Date "1985.??.??"]
[Round "?"]
[White "Tibensky"]
[Black "Franzen"]
[Result "1-0"]
[Annotator "#905!!*"]
[SetUp "1"]
[FEN "1r3rk1/b1pR1p2/p3p1p1/2q1P1Kp/P1N2P2/1P1Q2P1/7P/3R4 w - - 0 1"]
[PlyCount "21"]
[EventDate "1985.??.??"]

1. Kh6 $3 {Fritz 5.32 solves in 2 min 5 sec; Hiarcs 7.32 in 13 secs} 1... Qc6
2. Na5 Qc5 (2... Qxd7 3. Qxd7 $18) 3. b4 Qxb4 (3... Qb6 4. Qxg6+ fxg6 5. Rg7+
Kh8 6. Rh7+ Kg8 7. Rdd7 Rf7 8. Rdxf7 Qxb4 9. Rfg7+ Kf8 10. Rh8#) 4. Nc6 Qc5 5.
Qxg6+ fxg6 6. Rg7+ Kh8 7. Rdd7 Rf7 8. Rdxf7 Qxc6 9. Rh7+ Kg8 10. Rfg7+ Kf8 11.
Rh8# 1-0

[Event "Las Tunas"]
[Site "?"]
[Date "1987.??.??"]
[Round "?"]
[White "Arencibia"]
[Black "Armas, J."]
[Result "1-0"]
[Annotator "#916!!"]
[SetUp "1"]
[FEN "r2qr1k1/pbpp1ppn/1p2p3/n3P1P1/2PPN3/P1P5/5PP1/R2QKB1R w KQ - 0 1"]
[PlyCount "10"]
[EventDate "1987.??.??"]

1. Nf6+ $3 {Tough one as the first three white moves are difficult to find.
Genius 6 solves in 10 secs!, Zarkov 5 in 26 secs} 1... gxf6 (1... Nxf6 2. gxf6
g6 3. Qd2 Qxf6 4. exf6 e5 5. Rh8+ Kxh8 6. Qh6+ Kg8 7. Qg7#) 2. Rxh7 $1 Be4 3.
Bd3 fxe5 (3... Bxd3 4. Qxd3 f5 (4... fxe5 5. Qf3 Rf8 6. Qh5 Qxg5 7. Qxg5+ Kxh7
8. Ke2 exd4 9. Rh1#) 5. Qh3 Kf8 6. Qh6+ Ke7 7. Qf6+ Kf8 8. Rh8#) (3... Bxh7 4.
Bxh7+ Kg7 (4... Kxh7 5. Qh5+ Kg8 6. gxf6 Qxf6 7. exf6 Red8 8. Qh6 Nxc4 9. Qg7#)
(4... Kf8 5. gxf6 Qxf6 6. exf6 e5 7. Qg4 exd4+ 8. Kf1 Re1+ 9. Rxe1 dxc3 10.
Qg8#) 5. gxf6+ Qxf6 6. exf6+ Kxf6 7. Qf3+ Ke7 $18) 4. Bxe4 Qxg5 5. Rh5 Qf4 $18
1-0

[Event "Los Angeles"]
[Site "?"]
[Date "1987.??.??"]
[Round "?"]
[White "Gulko"]
[Black "Saidy"]
[Result "1-0"]
[Annotator "#921!!"]
[SetUp "1"]
[FEN "r4r1k/1bq2pp1/2p1p2p/1pPnP1BQ/4B2P/1p4P1/P4P2/3RR1K1 w - - 0 1"]
[PlyCount "7"]
[EventDate "1987.??.??"]

1. Rxd5 $3 {Fabulously complex position.  Difficult for the computers but not
so tough for humans.  Excellent test position.} 1... f6 (1... exd5 2. Bf6 Kg8
3. Qg4 g5 4. hxg5 Rfb8 5. gxh6+ Kf8 6. h7 dxe4 7. h8=R#) (1... cxd5 2. Bf6 Kg8
3. Qg4 g5 4. hxg5 Rfc8 5. gxh6+ Kf8 6. Qg8+ Kxg8 7. h7+ Kf8 8. h8=R#) (1... Kg8
2. Bf6 Ra4 3. Qg4 g6 4. Rd2 bxa2 5. Rxa2 Kh7 6. Rd2 $18) (1... f5 2. exf6 cxd5
3. fxg7+ Qxg7 4. Bg6 bxa2 5. Bxh6 a1=Q 6. Bxg7+ Kxg7 7. Qh7+ Kf6 8. Rxa1 Rxa1+
9. Kg2) 2. Rd6 (2. Rd2 f5 3. Bb1 Kg8) 2... f5 3. Rxe6 fxe4 4. Re7 $18 1-0

[Event "Jakarta"]
[Site "?"]
[Date "1987.??.??"]
[Round "?"]
[White "Rogers"]
[Black "Sitanggang"]
[Result "1-0"]
[Annotator "#925"]
[SetUp "1"]
[FEN "2q3r1/2r2ppk/b3p3/p2pPP1P/1p1B2Q1/1P6/1PPR4/4K1R1 w - - 0 1"]
[PlyCount "11"]
[EventDate "1987.??.??"]

1. Qg6+ {Fritz 5.32 solves in 4 secs} 1... Kh8 2. f6 Qf8 3. Rdg2 Rc8 4. fxg7+
Qxg7 5. Qxg7+ Rxg7 6. Rxg7 $18 1-0

[Event "Postal"]
[Site "?"]
[Date "1989.??.??"]
[Round "?"]
[White "Linusson"]
[Black "Rydholm"]
[Result "1-0"]
[Annotator "#949!!"]
[SetUp "1"]
[FEN "r4k1r/1p3pp1/2b1p1np/p3P3/3PN1q1/4Q1P1/5P1P/R1R2BK1 w - - 0 1"]
[PlyCount "11"]
[EventDate "1989.??.??"]

1. Rxc6 $3 bxc6 2. Be2 Qf5 3. Nd6 Qg5 4. Qf3 Qe7 5. Rb1 Rd8 6. Rb7 $18 1-0

[Event "Gausdel"]
[Site "?"]
[Date "1990.??.??"]
[Round "?"]
[White "Shirov"]
[Black "King"]
[Result "1-0"]
[Annotator "#960"]
[SetUp "1"]
[FEN "r6r/6k1/b2pBpp1/2bP4/p1q1P3/2P2RN1/2Q3PP/3R3K w - - 0 1"]
[PlyCount "15"]
[EventDate "1990.??.??"]

1. e5 dxe5 2. Nf5+ gxf5 3. Rg3+ Kf8 4. Qxf5 Qh4 (4... Qf4 5. Qg6 Ra7 6. Rh3
Qxh2+ 7. Kxh2 Rxh3+ 8. Kxh3 Ke7 9. Qf7+ Kd8 10. Qg8+ Kc7 11. Rb1 Bb4 12. Rxb4
Bb7 13. Qf7+ Kb8 14. Qe8+ Kc7 15. Qd7+ Kb8 16. Qc8#) (4... Be7 5. Qh5 Qf1+ 6.
Rxf1 Rxh5 7. Rg8#) 5. Rh3 Kg7 6. Rxh4 Rxh4 7. Qf3 Rah8 8. h3 $18 1-0

[Event "Philadelphia"]
[Site "?"]
[Date "1991.??.??"]
[Round "?"]
[White "Sherzer"]
[Black "Olafsson, H."]
[Result "1-0"]
[Annotator "#972"]
[SetUp "1"]
[FEN "2rrnbk1/1pqb1pp1/p2pp2p/6N1/Pn1BPP2/2N3Q1/1PP1B1PP/3R1R1K w - - 0 1"]
[PlyCount "27"]
[EventDate "1991.??.??"]

1. Bh5 {Complex position but the key move almost certainly lead to mate (CM
6000 find the key move in 1 sec)} 1... hxg5 2. fxg5 g6 3. Bxg6 e5 4. Bxf7+ Kg7
5. Qh4 Bf5 6. Be6 Qf7 7. Qh6+ Kg8 8. Bxf7+ Kxf7 9. Rxf5+ Nf6 10. Rxf6+ Kg8 11.
Rg6+ Kf7 12. Qh7+ Ke8 13. Re6+ Be7 14. Qxe7# 1-0

[Event "Manila Olympiad"]
[Site "?"]
[Date "1992.??.??"]
[Round "?"]
[White "Anand"]
[Black "Robatsch"]
[Result "1-0"]
[Annotator "#975"]
[SetUp "1"]
[FEN "r1b1k2r/pp3ppp/4pb2/2n5/3RB3/4BN2/PqP1QPPP/3R2K1 w kq - 0 1"]
[PlyCount "11"]
[EventDate "1992.??.??"]

1. Rd8+ {Tough position for computers} 1... Bxd8 2. Bxc5 Be7 (2... Bf6 3. Qd3
Be7 4. Bxe7 Kxe7 5. Qd6+ Kf6 6. Qf4+ Ke7 7. Ne5 Qxe5 (7... f6 8. Ng6+ hxg6 9.
Qc7+ Bd7 10. Qxd7+ Kf8 11. Bxg6 Rd8 12. Qf7#) 8. Qxe5 $18) 3. Qd3 f5 4. Bxf5
exf5 5. Bxe7 Be6 6. Ng5 $18 1-0

[Event "USA"]
[Site "?"]
[Date "1992.??.??"]
[Round "?"]
[White "Kaidanov"]
[Black "Donaldson"]
[Result "1-0"]
[Annotator "#976"]
[SetUp "1"]
[FEN "rq3rk1/1b1n1ppp/ppn1p3/3pP3/5B2/2NBP2P/PP2QPP1/2RR2K1 w - - 0 1"]
[PlyCount "17"]
[EventDate "1992.??.??"]

1. Nxd5 exd5 2. e6 Nde5 3. Rxc6 Bxc6 4. e7 Rc8 (4... Re8 5. Bxh7+ Kxh7 6. Qh5+
Kg8 7. Bxe5 Rxe7 (7... Qb7 8. Bxg7 f5 9. Bf6 Rxe7 10. Bxe7 Qxe7 11. Qg6+ Kh8
$18) 8. Bxb8 Rxb8 $18) 5. Bxh7+ Kxh7 6. Qh5+ Kg8 7. Bxe5 Qb7 8. Bxg7 f6 9. Bxf6
1-0

[Event "Moscow"]
[Site "?"]
[Date "1992.??.??"]
[Round "?"]
[White "Savchenko"]
[Black "Smagin"]
[Result "1-0"]
[Annotator "#980"]
[SetUp "1"]
[FEN "r4rk1/1pqb1pp1/pn2p2p/b3P3/P4Q1B/1B3N2/1P3PPP/1K1R3R w - - 0 1"]
[PlyCount "17"]
[EventDate "1992.??.??"]

1. Bf6 Nd5 (1... Rfc8 2. Qg3 g6 3. Qh4 h5 4. Qf4 Kh7 5. Ng5+ Kg8 6. Nxe6 Bd2 7.
Qxd2 $18) 2. Qg4 Nxf6 3. exf6 g6 4. Qh4 h5 5. Qg5 Kh7 6. Bc2 Qxc2+ (6... Rh8 7.
Rxd7 Qxd7 8. Ne5 Qe8 9. Bxg6+ fxg6 10. f7 Rg8 11. fxe8=Q Raxe8 $18) 7. Kxc2
Bxa4+ 8. b3 Rac8+ 9. Kb1 $18 1-0

[Event "Dortmund"]
[Site "?"]
[Date "1993.??.??"]
[Round "?"]
[White "Kamsky"]
[Black "Lautier"]
[Result "1-0"]
[Annotator "#983"]
[SetUp "1"]
[FEN "r2q1rk1/1p2bpp1/p1b2n1p/8/5B2/2NB4/PP1Q1PPP/3R1RK1 w - - 0 1"]
[PlyCount "17"]
[EventDate "1993.??.??"]

1. Bxh6 {Found by CM 6000 in 1 min 12 secs with the line 1.Bxh6 Re8 2.Bg5} 1...
gxh6 2. Qxh6 Qc7 (2... Bd6 3. Bf5 Re8 4. Rd3 $18) (2... Re8 3. Bc2 Bd6 4. Rd3
$18) 3. Qg5+ Kh8 4. Rfe1 Rfe8 5. Re3 Nh7 6. Qh5 f5 7. Rh3 Bh4 8. Rxh4 Qg7 9. g3
$18 1-0

[Event "Russia"]
[Site "?"]
[Date "1993.??.??"]
[Round "?"]
[White "Tsyn"]
[Black "Markov"]
[Result "1-0"]
[Annotator "#989"]
[SetUp "1"]
[FEN "r3k2r/2q2p1p/p1b1pb2/3p4/1p1Nn1Q1/8/PPP1NPPP/R1B1R1K1 w kq - 0 1"]
[PlyCount "11"]
[EventDate "1993.??.??"]

1. Nxe6 fxe6 2. Qxe6+ Be7 3. Nd4 Rc8 4. f3 Qd7 5. Qe5 O-O 6. fxe4 $18 1-0


And here's some result in AMD 450Mhz and 600 sec limit for reference:

Gambit Tiger 2        32/42
Goliath Light 1.5     29
Chess Tiger           24
Crafty 18.10          13

Jouni




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Last modified: Thu, 07 Jul 11 08:48:38 -0700

Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.