Author: Timothy J. Frohlick
Date: 22:02:22 03/07/05
Go up one level in this thread
It is odd that even the mighty Shredder 8.0 doesn't find the sac within seconds. I chose Bxh7 instantly but had some difficulty in finding the win. TJ New game r1bb1rnk/1pq2ppp/p3p3/4P3/2nNBB2/2N3Q1/P1P3PP/3R1R1K w - - 0 1 Analysis by Shredder 8: AMD 1500 MHz with 512 MB RAM 1.Nf5 exf5 -+ (-3.80) Depth: 1/2 00:00:00 1.Nf5 exf5 -+ (-3.10) Depth: 1/2 00:00:00 1.Qh3 Nxe5 -+ (-2.32) Depth: 1/2 00:00:00 1.Qh3 Nxe5 -+ (-1.51) Depth: 1/2 00:00:00 1.Qh3 Nxe5 2.Qxh7# ± (1.27) Depth: 1/3 00:00:00 1.Qh3 h6 2.Nxe6 Bxe6 3.Qxh6+ Nxh6 ± (0.95) Depth: 5/9 00:00:00 1.Qh3 h6 2.Nxe6 Bxe6 3.Qxh6+ Nxh6 ± (0.95) Depth: 5/9 00:00:00 1.Qh3 h6 2.Nxe6 Bxe6 3.Qxh6+ Nxh6 ± (0.95) Depth: 5/9 00:00:00 1.Qh3 h6 2.Nxe6 Bxe6 3.Qxh6+ Nxh6 ± (0.95) Depth: 5/9 00:00:00 1.Qh3 h6 2.Qg3 g5 3.Bd2 Nxe5 ± (0.71) Depth: 5/16 00:00:00 1.Nde2 Nxe5 2.Bxe5 Nh6 3.Bxc7 ± (0.72) Depth: 5/16 00:00:00 1.Nde2 Qc5 2.Qh3 f5 3.Qh6 gxh6 ± (0.72) Depth: 5/16 00:00:00 1.Nb3 Nxe5 2.Bxe5 f5 3.Bxc7 ± (0.73) Depth: 5/16 00:00:00 1.Nb3 Ne7 2.Rxd8 Rxd8 3.Qxg7+ Kxg7 ± (0.73) Depth: 5/16 00:00:00 1.a4 Nxe5 2.Bxe5 f5 3.Bxc7 ± (0.74) Depth: 5/16 00:00:00 1.a4 Ne7 2.Qh3 Ng6 3.Bxg6 fxg6 4.Nxe6 ± (0.84) Depth: 5/16 00:00:00 1.a4 Ne7 2.Qh3 Ng6 3.Bxg6 fxg6 4.Nxe6 ± (0.84) Depth: 6/14 00:00:00 1.a4 h6 2.Qh3 Nxe5 3.Bxe5 Qxe5 4.Qxe6 Bxe6 ² (0.59) Depth: 7/19 00:00:00 88kN 1.a4 h6 2.Nde2 Ne7 3.Bd3 Nd5 4.Nxd5 exd5 ² (0.45) Depth: 7/20 00:00:00 110kN 1.Rf2 Ne7 2.Qh3 Nf5 3.Nxf5 Kg8 ² (0.46) Depth: 7/20 00:00:00 154kN 1.Rf2 h6 2.Kg1 g5 3.Nf3 gxf4 4.Qg7+ Kxg7 ² (0.46) Depth: 7/24 00:00:00 177kN 1.Rf3 Ne7 2.Qh3 Nxe5 3.Qxh7# ² (0.47) Depth: 7/24 00:00:00 200kN 1.Rf3 h6 2.Nb3 g5 3.Be3 Nxe3 4.Rxe3 f5 ² (0.63) Depth: 7/24 00:00:01 224kN 1.Rf3 h6 2.Nb3 Ne7 3.Rff1 g5 4.Qh3 gxf4 5.Qxh6+ Kg8 ² (0.53) Depth: 8/20 00:00:01 328kN 1.Rf3 h6 2.Nb3 g5 3.Be3 Nxe3 4.Rxe3 f5 5.Rf3 Bd7 ² (0.47) Depth: 9/21 00:00:02 594kN 1.Rf3 h6 2.Nb3 g5 3.Be3 Nxe3 4.Rxe3 f5 5.Qh3 fxe4 = (0.22) Depth: 10/21 00:00:04 1107kN 1.Rf3 h6 2.Nde2 g5 3.Be3 Nxe3 4.Rxe3 f5 5.Bd3 b5 6.Rf3 = (0.03) Depth: 10/21 00:00:05 1370kN 1.Rf2 h6 2.Qh3 Nxe5 3.Qg3 Bf6 4.Nde2 g5 5.Bc1 = (0.04) Depth: 10/26 00:00:06 1562kN 1.Rf2 h6 2.Nb3 g5 3.Bc1 Qxe5 4.Rdf1 Qxg3 = (0.04) Depth: 10/26 00:00:07 1670kN 1.Rd3 Ne7 2.Qh3 Ng6 3.Qh5 Bd7 4.Rh3 Nxf4 5.Rxf4 = (0.05) Depth: 10/26 00:00:08 2060kN 1.Rd3 Ne7 2.Qh3 Ng6 3.Qh5 Bd7 4.Rh3 Ncxe5 5.Bxe5 ² (0.40) Depth: 10/26 00:00:09 2303kN 1.Rd3 Ne7 2.Qh3 Ng6 3.Qh5 Kg8 4.Rh3 h6 5.Bxg6 fxg6 6.Qxg6 Nxe5 7.Rg3 Nxg6 ² (0.40) Depth: 10/28 00:00:10 2376kN 1.Rd3 h6 2.Qh3 Be7 3.Nf3 f5 4.exf6 Qxf4 5.fxe7 Nxe7 6.Qh5 ² (0.49) Depth: 11/25 00:00:15 3751kN 1.Rd3 h6 2.Nf3 Nb2 3.Re3 Qa5 4.Ne2 Qxa2 5.Rb3 Ne7 6.Bxb7 Bxb7 7.Qxg7+ ² (0.26) Depth: 12/27 00:00:26 6219kN 1.Na4 Bd7 2.Qh3 h6 3.Qb3 Nxe5 4.Nf3 Bxa4 5.Qxa4 g5 6.Bxe5+ f6 7.Bxc7 ² (0.27) Depth: 12/30 00:00:35 8405kN 1.Na4 Bd7 2.Qh3 h6 3.Qb3 Nxe5 4.Nf3 Bxa4 5.Qxa4 Bf6 6.Qxa6 ² (0.27) Depth: 12/30 00:00:37 8870kN 1.Na4 Ne7 2.Qh3 Ng6 3.Bxg6 fxg6 4.Nxe6 Qe7 5.Bg5 Rxf1+ 6.Rxf1 Qe8 7.Nxd8 Bxh3 8.Rf8+ Qxf8 9.Nf7+ Qxf7 = (0.02) Depth: 13/34 00:00:57 13800kN 1.Na4 Ne7 2.Qh3 Ng6 3.Nf3 b5 4.Bg5 Bb7 5.Bxb7 Qxb7 6.Bxd8 Raxd8 7.Ng5 Qxg2+ 8.Kxg2 Rd2+ 9.Rxd2 = (0.02) Depth: 13/34 00:01:02 15152kN 1.Rd3 h6 2.Nf3 Nb2 3.Re3 Qa5 4.Ne2 Qxa2 5.Rb3 Ne7 6.Nc3 f5 = (0.03) Depth: 13/34 00:01:04 15641kN 1.Rd3 h6 2.Qf3 Nb2 3.Rd2 Nc4 4.Rdf2 Nxe5 5.Bxe5 Qxe5 6.Qh5 Qxh5 = (0.22) Depth: 13/36 00:01:12 17626kN 1.Rd3 h6 2.Nf3 Nb2 3.Re3 Qa5 4.Nb1 Nc4 5.Rb3 Ne7 6.Nfd2 Nxd2 7.Bxd2 Qxa2 8.Nc3 Qa5 ² (0.28) Depth: 14/32 00:02:02 29608kN 1.Rd3 h6 2.Nf3 Nb2 3.Re3 Qa5 4.Nb1 Nc4 5.Rb3 Ne7 6.Nfd2 Nxd2 7.Bxd2 Qxa2 8.Nc3 Qa5 9.Rbb1 = (0.19) Depth: 15/34 00:03:15 47192kN 1.Bxh7 Kxh7 2.Ne4 Qa5 3.Qd3 Qxa2 4.Nf6+ Kh8 5.Qh7# = (0.20) Depth: 15/38 00:03:46 55047kN 1.Bxh7 Kxh7 2.Ne4 Qa5 3.Qd3 Nxe5 4.Nf6+ Kh8 5.Qh7# ² (0.55) Depth: 15/38 00:03:53 56765kN (Frohlick, MyTown 07.03.2005) On March 08, 2005 at 00:13:51, Jon Dart wrote: >From a recent Arasan game on ICC: > >[D] r1bb1rnk/1pq2ppp/p3p3/4P3/2nNBB2/2N3Q1/P1P3PP/3R1R1K w - - > >Bxh7 wins. > >Crafty finds it after about 7 minutes on my XP2500+ but doesn't >give it more than a draw score: > > 11 2:21 -0.21 1. Nb3 Ne7 2. Qh3 Nf5 3. Bxf5 exf5 > 4. Nd5 Qc6 5. Qh5 Be6 6. Qf3 Bb6 7. > Nxb6 Qxf3 8. Rxf3 Nxb6 > 11-> 3:40 -0.21 1. Nb3 Ne7 2. Qh3 Nf5 3. Bxf5 exf5 > 4. Nd5 Qc6 5. Qh5 Be6 6. Qf3 Bb6 7. > Nxb6 Qxf3 8. Rxf3 Nxb6 > 12 4:13 -0.19 1. Nb3 Ne7 2. Qh3 Nf5 3. Nd2 Nce3 4. > Bxf5 Nxf5 5. Nde4 Be7 6. g4 Nh4 7. > Nd6 > 12 6:08 0.01 1. Bxh7 Kxh7 2. Ne4 Nh6 3. Nf6+ Kh8 > 4. Bxh6 gxh6 5. Qh4 Bxf6 6. exf6 Kh7 > 7. Qe4+ Kh8 8. Qh4 > 12-> 6:36 0.01 1. Bxh7 Kxh7 2. Ne4 Nh6 3. Nf6+ Kh8 > 4. Bxh6 gxh6 5. Qh4 Bxf6 6. exf6 Kh7 > 7. Qe4+ Kh8 8. Qh4 > 13 7:15 0.01 1. Bxh7 Kxh7 2. Ne4 Nh6 3. Nf6+ Kh8 > 4. Bxh6 gxh6 5. Qh4 Kg7 6. Qg4+ Kh8 > 7. Qh4 > >White can play 5. Qf4 instead with the line: >Bxh7 Kxh7 Ne4 Nh6 Nf6+ Kh8 Bxh6 gxh6 Qf4 Kg7 Rd3 Nxe5 Rh3 Rh8 Ne8+ >winning the Queen.
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