Author: Stan Arts
Date: 11:08:55 03/05/04
Go up one level in this thread
On March 05, 2004 at 13:35:31, Roy Brunjes wrote: >The ChessBase site reports on Linares and provides PGN files if the games. At >least some of these games even have analysis. The game between Kasparov and >Topalov was analyzed, apparently with Fritz (version unknown). The key position >is here: > >[D] 2b2rk1/2pn1p2/3p2pB/2nPp2N/4P2b/2P3RN/q1B2PP1/3Q2K1 w - - 0 27 > >The report says that Kasparov missed a win with 27. Rxg6+!! > >In analyzing this game with Chessmaster 9000, it does not prefer to play 27. >Rxg6+. I began stepping through the moves in the ChessBase analysis to see if >there was something Chessmaster missed. > >It appears to me, and I am quite possibly the worst player who frequents this >bulletin board, that the following line shows that Rxg6+ is at best a draw : > >27. Rxg6+ fxg6 >28. Qg4 Bxf2+ (!) >29. Kh2 [ Nxf2 is also shown as a draw by Chessmaster 9000 and Fritz 8] >29. ... Kh7 >30. Bxf8 Qxc2 >31. Qg5 [Or Ng5+ is also a draw it seems]. > >So, where did Chessmaster go wrong? Or is it really drawn and the analysis done >by Fritz on the ChessBase site is not accurate? > >Roy After Rxg6, and Qg4 there's no easy or clear win, it seems. Neurosis 1.7 with 48 MB hash, on PIII-550 , Legal moves: 39 Static score: 3 Ply Score Time Nodes Best move and expected line ------------------------------------------------------------ 2 144 6 1632 Rg4 Re8 3 144 6 2280 Rg4 Re8 Rxh4 4 145 22 12138 Rg4 Rd8 Rxh4 gxh5 5 145 77 42829 Rg4 Rd8 Rxh4 gxh5 Rxh5 6 136 341 191858 Rg4 Rd8 Rxh4 gxh5 Rxh5 Bb7 7 96 939 588114 Rg4 < - > Be7 Bxf8 Kxf8 Ng5 Qc4 Ne6+ 7 68 1060 654914 Rg4 Be7 Bxf8 Kxf8 Bb1 Qc4 Ng3 8 68 3087 2004280 Rg4 Be7 Bxf8 Kxf8 Bb1 Qc4 Ng3 Qxc3 9 28 6591 4389387 Rg4 < - > Be7 Bxf8 Kxf8 Bb1 Qc4 Ng5 gxh5 Ne6+ 9 0 17549 11486278 Rg4 Be7 Kh2 Rd8 Kh1 Kh7 Bb1 Qb3 Qxb3 10 -4 61868 44551811 Rg4 Be7 Kh1 Rd8 Rg3 Bb7 Ng7 Kh7 Qc1 Kg8 11 1 186686 134109972 Rg4 Be7 f4 Re8 f5 Nf6 Nxf6+ Bxf6 Kh1 Qb2 Qd2 11 2 324275 221918283 Re3 < + > gxh5 Qxh5 Qa1+ Kh2 Nf6 Qxh4 Bxh3 Kg3 Bf5 11 2 439558 308182882 Re3 Re8 Ng3 Bb7 Ng5 Ra8 Qd2 f6 Kf1 Total nodes:532725056 n/sec:73400 (Q-nodes:23% max depth:26) Then, after forcing Rxg6 , Legal moves: 3 Static score: -126 Ply Score Time Nodes Best move and expected line ------------------------------------------------------------ 2 194 0 157 fxg6 Bxf8 3 194 0 905 fxg6 Bxf8 Nxf8 4 200 6 3619 fxg6 Bxf8 Nxf8 Bb1 5 202 22 12052 fxg6 Bxf8 Nxf8 Bb1 Qb2 6 191 203 160660 fxg6 Qg4 g5 Bxf8 Qxc2 g3 7 230 357 254555 fxg6 Bxf8 Kxf8 Ng3 Ke8 Ne2 Bb7 8 239 2411 1917699 fxg6 Qg4 g5 Bxg5 Bxg5 Qxg5+ Kf7 Qc1 9 250 7212 5535842 fxg6 Qg4 g5 Qd1 Rf7 Bxg5 Bxg5 Nxg5 Rf8 10 248 25332 20372997 fxg6 Qg4 g5 Qd1 Rf7 Bxg5 Bxg5 Nxg5 Rf8 Qe2 11 256 65532 50117451 fxg6 Qg4 g5 Nxg5 Bxf2+ Kh2 Qxc2 Bxf8 Kxf8 Qf5+ Ke8 Qf7+ 12 216 147986 114172005 fxg6 < - > Qg4 g5 Nxg5 Bxf2+ Kh2 Nxe4 Bxf8 c6 dxc6 12 201 417818 335779179 fxg6 Qg4 g5 Nxg5 Qxc2 Nf3+ Kf7 Nxh4 Qxe4 Qg7+ Ke8 Qxf8+ Doesn't find anything, and keeps giving black a big score. If there is a win, it's extremely deep.. Stan
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.