Author: Dann Corbit
Date: 14:53:12 01/02/02
Go up one level in this thread
On January 02, 2002 at 16:55:19, Uri Blass wrote: >I found that at least in one problem of wac my program find the right move but >gets negative score for white > >I talk about WAC 258 > >[D]r3brkn/1p5p/2p2Ppq/2Pp3B/3Pp2Q/4P1R1/6PP/5R1K w - - bm Bxg6 > >Here is yace's opinion after 1.Bxg6 Qxg6 > >New position >r3brkn/1p5p/2p2Pq1/2Pp4/3Pp2Q/4P1R1/6PP/5R1K w - - 0 1 > >Analysis by Yace 0.99.56: > >2.Rxg6+ Nxg6 3.Qg5 Rf7 4.h4 Kh8 5.h5 Nf8 6.Rb1 Ra3 7.Qh6 Ne6 8.Rf1 > = (-0.12) Depth: 1 00:00:00 >2.Rxg6+ Nxg6 3.Qg5 Rf7 4.h4 Kh8 5.h5 Nf8 6.Rb1 Ra3 7.Qh6 Ne6 8.Rf1 > = (-0.12) Depth: 2 00:00:00 >2.Rxg6+ Nxg6 3.Qg5 Rf7 4.h4 Kh8 5.h5 Nf8 6.Rb1 Ra3 7.Qh6 Ne6 8.Rf1 > = (-0.12) Depth: 3 00:00:00 >2.Rxg6+ Nxg6 3.Qg5 Rf7 4.h4 Kh8 5.h5 Nf8 6.Rb1 Ra3 7.Qh6 Ne6 8.Rf1 > = (-0.12) Depth: 4 00:00:00 >2.Rxg6+ Nxg6 3.Qg5 Rf7 4.h4 Kh8 5.h5 Nf8 6.Rb1 Ra3 7.Qh6 Ne6 8.Rf1 > = (-0.12) Depth: 5 00:00:00 >2.Rxg6+ Nxg6 3.Qg5 Rf7 4.h4 Kh8 5.h5 Nf8 6.Rb1 Ra3 7.Qh6 Ne6 8.Rf1 > = (-0.12) Depth: 6 00:00:00 >2.Rxg6+ Nxg6 3.Qg5 Rf7 4.h4 Kh8 5.h5 Nf8 6.Rb1 Ra3 7.Qh6 Ne6 8.Rf1 > = (-0.12) Depth: 7 00:00:00 >2.Rxg6+ Nxg6 3.Qg5 Rf7 4.h4 Kh8 5.h5 Nf8 6.Rb1 Ra3 7.Qh6 Ne6 8.Rf1 > = (-0.12) Depth: 8 00:00:00 >2.Rxg6+ Nxg6 3.Qg5 Rf7 4.h4 Kh8 5.h5 Nf8 6.Rb1 Ra3 7.Qh6 Ne6 8.Rf1 > = (-0.12) Depth: 9 00:00:00 1kN >2.Rxg6+ Nxg6 3.Qg5 Rf7 4.h4 Kh8 5.h5 Nf8 6.Rb1 Ra3 7.Qh6 Ne6 8.Rf1 > = (-0.12) Depth: 10 00:00:00 3kN >2.Rxg6+ Nxg6 3.Qg5 Rf7 4.h4 Kh8 5.Rb1 Nf8 6.Kh2 b5 7.cxb6 Nd7 8.b7 Rb8 9.Rf1 > ³ (-0.29) Depth: 12 00:00:20 7045kN >2.Qf4 Rf7 3.h4 Bd7 4.h5 Ra1 5.hxg6 Nxg6 > ³ (-0.28) Depth: 12 00:00:29 10795kN >2.Qf4 Rf7 3.h4 h6 4.Rxg6+ Nxg6 5.Qf5 Nf8 6.Qg4+ Kh7 7.Qf5+ Kh8 8.Kh2 Ra3 9.Qf4 >Kh7 10.g3 > = (-0.10) Depth: 12 00:00:56 19846kN >2.Qf4 Rf7 3.h4 h6 4.Rxg6+ Nxg6 5.Qf5 Nf8 6.Kh2 Kh8 7.Rf2 Ra3 8.Qf4 Kh7 9.g3 > = (-0.10) Depth: 13 00:01:27 29195kN >2.Qf4 Rf7 3.h4 h6 4.Rxg6+ Nxg6 5.Qf5 Nf8 6.Qf4 Kh7 7.Qf5+ Kh8 8.g3 Nd7 9.Qe6 Rb8 > = (-0.13) Depth: 14 00:02:42 49564kN >2.Qf4 Rf7 3.h4 h6 4.Rxg6+ Nxg6 5.Qf5 Ne7 6.Qg4+ Kh7 7.h5 Ng8 8.Qf5+ Kh8 9.Qe6 b5 >10.cxb6 Re7 > = (-0.04) Depth: 15 00:08:00 146140kN > >(Blass, Tel-aviv 02.01.2002) > >I did not analyze the position for a long time. >Did someone analyze it to find if white is winning? Pepito 17 ply search: 17 -20 19971 78794049 Bh5xg6 Qh6xg6 Qh4-f4 Rf8-f7 h4 h6 Rg3xg6 Nh8xg6 Qf4-f5 Ng6-e7 Qf5-f4 Kg8-h7 g4 Ne7-g6 Qf4-g3 Kh7-g8 g5 Kg8-h7 h5 17 -20 24902 96182803 Bh5xg6 Qh6xg6 Qh4-f4 Rf8-f7 h4 h6 Rg3xg6 Nh8xg6 Qf4-f5 Ng6-e7 Qf5-f4 Kg8-h7 g4 Ne7-g6 Qf4-g3 Kh7-g8 g5 Kg8-h7 h5 Chess Tiger 14's 16 ply search: r3brkn/1p5p/2p2Ppq/2Pp3B/3Pp2Q/4P1R1/6PP/5R1K w - - ce -48; acd 16; acs 1; pv Bxg6 Qxg6 Rxg6+ Nxg6 Qf2 Rf7 g4 Bd7;|!1 ChessMaster 8000 said this: Time Depth Score Positions Moves 0:03 4/9 -0.22 455773 1. Bxg6 Qxg6 2. Rxg6+ Nxg6 3. Qf2 Ra3 4. h4 h5 5. Rb1 Rf7 6. Kg1 0:11 4/10 -0.15 1546526 1. Bxg6 Qxg6 2. Rxg6+ Nxg6 3. Qf2 Rf7 4. h4 h5 5. Qg3 Rd7 6. Qh3 Nf8 7. Kg1 0:29 5/11 -0.16 4376543 1. Bxg6 Qxg6 2. Rxg6+ Nxg6 3. Qf2 Rf7 4. h4 h5 5. Qf5 Rh7 6. Qe6+ Bf7 7. Qd7 Nxh4 8. Qxb7 2:11 6/12 0.00 19272379 1. Bxg6 Qxg6 2. Rxg6+ hxg6 3. Kg1 Bd7 4. Qg3 Ra2 5. h4 Be6 6. Qc7 Rf7 7. Qd8+ Kh7 8. Rf2 Ra1+ 9. Rf1 Ra2 I can't find a game where this position actually occurs, so I don't know what the answer is supposed to be. There are some other positions in WAC that are worse than this (e.g. the best move probably still loses).
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