Author: Uri Blass
Date: 07:47:11 05/20/04
Go up one level in this thread
On May 20, 2004 at 10:37:12, Uri Blass wrote: >On May 20, 2004 at 10:06:36, Will Singleton wrote: > >>Sometimes Crafty gives me a headache. I was sitting there, minding my own >>business, when all of a sudden pow! and Crafty wins another one. Must be >>something to this smp business. >> >>Anyway, on ICC Crafty runs on a 2x 2.8ghz xeon. It found Rxg6 in about a >>minute, if you count my thinking time plus its thinking time (assuming it >>pondered correctly, which it probably did). If I run the same position on my p4 >>2.8ghz, it takes Crafty 4:44 to find the move. I suppose the hash could affect >>things, but that's still quite a speedup. >> >>Here's the position. Finding Rxg6 probably depends in large part on >>king-safety, since Amateur likes it fairly quickly (p4 2.8ghz): >> >>[d]2rq1r1k/1pp1bp2/p5pp/1n1Pp3/2B1N3/4PP2/PPQ2PRP/6RK w - - >> >>10 -28 283 1103649 Qb3 Nd6 Bd3 Nxe4 >>11 -23 452 1839082 Qb3 Nd6 Bd3 Nxe4 fxe4 Rb8 f4 Bc5 Bc2 Qd6 f5 Rg8 fxg6 fxg6 >>12 -14 889 3652804 Qb3 Nd6 Bd3 Bh4 >>13 -9 1572 6584263 Qb3 Nd6 Bd3 Nxe4 fxe4 Rb8 Qc3 Qd6 Rc1 Rc8 f4 Bf6 Qc5 Qd7 >>14 -5 4219 17715012 Qb3 Nd6 Bd3 Ra8 Nxd6 Qxd6 Qc3 Rd8 e4 >>14 6 6427 26545535 Rxg6 fxg6 Rxg6 Rf5 > > >Movei can find it at depth 12 and has a significant fail high(clearly more than >amateur) > >10 -4 6223 12147985 c2b3 d8d7 c4e2 c8a8 a2a4 b5d6 e4c5 d7c8 f3f4 e5f4 b3c3 h8g8 > e3f4 >11 2 7440 14469997 c2b3 b5d6 c4d3 c8b8 b3c3 d6e4 f3e4 d8d6 g1d1 b8c8 h1g1 >11 2 9454 18614491 c2b3 b5d6 c4d3 c8b8 b3c3 d6e4 f3e4 d8d6 g1d1 b8c8 h1g1 >12 4 13230 25854307 c2b3 b5d6 c4d3 d6e4 f3e4 c8b8 f2f4 d8d6 g1f1 h8g8 f4f5 e7g5 > f5g6 d6g6 >12 5 20050 39877602 g2g6 >12 34 22062 43841142 g2g6 >12 70 27037 53351187 g2g6 f7g6 g1g6 b5d6 e4d6 d8d6 g6d6 c7d6 b2b3 f8f3 c2g6 f3f >6 g6g4 >12 70 27636 54535862 g2g6 f7g6 g1g6 b5d6 e4d6 d8d6 g6d6 c7d6 b2b3 f8f3 c2g6 f3f >6 g6g4 >13 81 34854 66663703 g2g6 f7g6 g1g6 b5d6 e4d6 d8d6 g6d6 c7d6 b2b3 f8f3 c2g6 f3f >6 g6g4 f6f8 > > I can add that yace also agree it is tactics and shows similiar line to movei in the first plies not Rxg6 fxg6 Rxg6 Rf5 but Rxg6 fxg6 Rxg6 Nd6 Here is analysis one ply after Rxg6(yace probably needs a long time to find Rxg6 from the root position). New game, 2rq1r1k/1pp1bp2/p5Rp/1n1Pp3/2B1N3/4PP2/PPQ2P1P/6RK b - - 0 1 Analysis by Yace Paderborn: 1...fxg6 2.Rxg6 Rxf3 3.Rxh6+ Kg8 -+ (-2.51) Depth: 1 00:00:00 1...fxg6 2.Rxg6 Rxf3 3.Rxh6+ Kg8 -+ (-2.51) Depth: 1 00:00:00 1...fxg6 2.Rxg6 Rxf3 3.Rxh6+ Kg8 -+ (-2.51) Depth: 2 00:00:00 1...fxg6 2.Rxg6 Rxf3 3.Rxh6+ Kg8 -+ (-2.51) Depth: 2 00:00:00 1...fxg6 2.Rxg6 Rxf3 3.Rxh6+ Kg8 -+ (-2.51) Depth: 3 00:00:00 1...fxg6 2.Rxg6 Rxf3 3.Rxh6+ Kg8 -+ (-2.51) Depth: 3 00:00:00 1...fxg6 2.Rxg6 Bg5 3.a4 Nd6 -+ (-2.32) Depth: 4 00:00:00 1...fxg6 2.Rxg6 Bg5 3.a4 Nd6 -+ (-2.32) Depth: 4 00:00:00 1...fxg6 2.Rxg6 Bg5 3.Nc5 Nd6 4.Ne6 -+ (-2.33) Depth: 5 00:00:00 1...fxg6 2.Rxg6 Bg5 3.Nc5 Nd6 4.Ne6 -+ (-2.33) Depth: 5/17 00:00:00 1...fxg6 2.Rxg6 Rxf3 3.Rxh6+ Kg7 4.Re6 Rf5 5.a3 -+ (-2.13) Depth: 6/17 00:00:00 104kN 1...fxg6 2.Rxg6 Rxf3 3.Rxh6+ Kg7 4.Re6 Rf5 5.a3 -+ (-2.13) Depth: 6/22 00:00:00 120kN 1...fxg6 2.Rxg6 Rxf3 3.Rxh6+ Kg7 4.Rh5 Qe8 5.Rxe5 Qh5 -+ (-1.73) Depth: 7/22 00:00:01 246kN 1...fxg6 2.Rxg6 Rxf3 3.Rxh6+ Kg7 4.Rh5 c6 5.dxc6 Rxc6 -+ (-1.73) Depth: 7/23 00:00:01 329kN 1...fxg6 2.Rxg6 Rxf3 3.Rxh6+ Kg7 4.Rh5 c6 5.dxc6 Rxc6 -+ (-1.73) Depth: 7/23 00:00:02 416kN 1...fxg6 2.Rxg6 Rxf3 3.Rxh6+ Kg7 4.Rh5 c6 5.dxc6 Rxc6 6.Rxe5 -+ (-1.73) Depth: 8/23 00:00:04 1004kN 1...fxg6 2.Rxg6 Rxf3 3.Rxh6+ Kg7 4.Rh5 c6 5.dxc6 Rxc6 6.Rxe5 -+ (-1.73) Depth: 8/28 00:00:04 1123kN 1...fxg6 2.Rxg6 Rxf3 3.Rxh6+ Kg7 4.Rh5 Qf8 5.Rxe5 Qf7 6.a4 Bd6 -+ (-1.68) Depth: 9/29 00:00:10 3129kN 1...fxg6 2.Rxg6 Rxf3 3.Rxh6+ Kg7 4.Rh5 Qf8 5.Rxe5 Qf7 6.a4 Bd6 -+ (-1.68) Depth: 9/29 00:00:11 3372kN 1...fxg6 2.Rxg6 Rxf3 3.Rxh6+ Kg7 4.Nf6 Bxf6 5.Qg6+ Kf8 6.d6 cxd6 7.Qg8+ Ke7 8.Rh7+ Bg7 9.Rxg7+ Kf6 10.Qxd8+ Kxg7 µ (-1.28) Depth: 10/35 00:00:22 7099kN 1...fxg6 2.Rxg6 Rxf3 3.Rxh6+ Kg7 4.Nf6 Bxf6 5.Qg6+ Kf8 6.d6 cxd6 7.Qg8+ Ke7 8.Rh7+ Bg7 9.Rxg7+ Kf6 10.Qxd8+ Kxg7 ³ (-0.28) Depth: 10/35 00:00:33 11332kN 1...fxg6 2.Rxg6 Rf5 3.Ng5 Qf8 4.Ne6 Qf7 5.Rg7 Qh5 6.Rxe7 Qxf3+ 7.Kg1 ³ (-0.26) Depth: 10/40 00:01:04 23473kN 1...fxg6 2.Rxg6 Rf5 3.Ng5 Qf8 4.Ne6 Qf7 5.Rg7 Qh5 6.Rxe7 Qxf3+ 7.Kg1 ³ (-0.26) Depth: 10/40 00:01:12 26461kN 1...fxg6 2.Rxg6 Rf5 3.Rxh6+ Kg7 4.Rh3 Qd7 5.Ng3 Nd6 6.Nxf5+ Nxf5 7.Qe4 Kf6 8.Rh7 ³ (-0.32) Depth: 11/40 00:01:52 41304kN 1...fxg6 2.Rxg6 Rf5 3.Rxh6+ Kg7 4.Rh3 Qd7 5.Ng3 Nd6 6.Nxf5+ Nxf5 7.Qe4 Kf6 8.Rh7 ³ (-0.32) Depth: 11/40 00:01:57 42672kN 1...fxg6 2.Rxg6 Rf5 3.Rxh6+ Kg7 4.Ng3 Kxh6 5.Nxf5+ Kg5 6.f4+ exf4 7.Qe4 Bf6 8.exf4+ Kg6 9.Ne7+ Kf7 10.Qe6+ Ke8 11.Nxc8+ Qe7 = (0.08) Depth: 12/45 00:05:09 115352kN 1...fxg6 2.Rxg6 Nd6 3.Nxd6 Qxd6 4.Rxd6 cxd6 5.Qe4 b5 6.Bd3 ± (1.05) Depth: 12/46 00:09:32 209310kN 1...fxg6 2.Rxg6 Nd6 3.Nxd6 Qxd6 4.Rxd6 cxd6 5.Qe4 b5 6.Bd3 ± (1.05) Depth: 12/46 00:09:45 213238kN (Blass, Tel-Aviv 20.05.2004) >Uri
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