Author: Laurence Chen
Date: 19:27:10 01/03/00
Go up one level in this thread
On January 03, 2000 at 12:38:58, Ignacio Santos Crespo wrote: >It´s difficult for the chess programs find mate at these positions > >r6k/6p1/4p2p/1p1pB3/p2P4/4P2P/P4PPK/1Q6 w - - >4r2k/6p1/4p2p/1p1pB3/p2P4/4P2P/P4PPK/1Q6 w - - >r1b2r1k/1pq2ppp/p2b1n1N/8/2B1p3/1P3Q2/PBP2PPP/R4R1K w - - >r1bq1k1r/1p1pn1bp/3Q2p1/p5p1/2B5/4R3/PP3PPP/R5K1 w - - >2r3k1/1b3pq1/2r1p1p1/1p1pP1Q1/1b1B4/pN1BP1P1/2P3KR/7R w - - > >The first is mate in 8 and the others mate in 9. >Can your favourite program solves? [FEN "r6k/6p1/4p2p/1p1pB3/p2P4/4P2P/P4PPK/1Q6 w - - 0 1"] [PlyCount "15"] 1. Qxb5 Rf8 2. Qd7 Rf6 3. Bxf6 gxf6 4. Kg3 e5 5. Kh4 exd4 6. Kh5 dxe3 7. Kg6 exf2 8. Qe8# 1-0 FEN "4r2k/6p1/4p2p/1p1pB3/p2P4/4P2P/P4PPK/1Q6 w - - 0 1"] [PlyCount "15"] 1. Qxb5 Rf8 2. Qd7 Rf6 3. Bxf6 gxf6 4. Kg3 e5 5. Kh4 exd4 6. Kh5 dxe3 7. Kg6 exf2 8. Qe8# 1-0 [FEN "r1b2r1k/1pq2ppp/p2b1n1N/8/2B1p3/1P3Q2/PBP2PPP/R4R1K w - - 0 1"] [PlyCount "17"] 1. Qxf6 Rg8 2. Qxd6 f6 3. Qxc7 Be6 4. Qe7 Bd5 5. Bxd5 Rgf8 6. Nf5 Rg8 7. Qxf6 Rad8 8. Qxg7+ Rxg7 9. Bxg7# 1-0 [FEN "r1bq1k1r/1p1pn1bp/3Q2p1/p5p1/2B5/4R3/PP3PPP/R5K1 w - - 0 1"] [PlyCount "17"] 1. Rae1 Ra6 2. Bxa6 Be5 3. Rxe5 Kg7 4. Rxe7+ Qxe7 5. Rxe7+ Kh6 6. Qg3 d5 7. h4 Bg4 8. Qxg4 bxa6 9. hxg5# 1-0 [FEN "2r3k1/1b3pq1/2r1p1p1/1p1pP1Q1/1b1B4/pN1BP1P1/2P3KR/7R w - - 0 1"] [PlyCount "17"] 1. Na1 Rxc2+ 2. Nxc2 f6 3. exf6 Be7 4. Rh8+ Kf7 5. Bxg6+ Qxg6 6. R1h7+ Qxh7 7. Rxh7+ Kf8 8. Qg7+ Ke8 9. Qxe7# 1-0
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