Author: Ferdinand S. Mosca
Date: 15:55:10 06/12/02
Go up one level in this thread
On June 12, 2002 at 18:37:30, Roy Eassa wrote: >On June 12, 2002 at 18:32:43, Roy Eassa wrote: > >>On June 12, 2002 at 18:26:05, Roy Eassa wrote: >> >>>On June 12, 2002 at 16:46:50, Ferdinand S. Mosca wrote: >>> >>>>[D]6R1/1p1r2p1/p3k1Pp/P2pP2K/2pP4/2P5/1P6/8 w - - 0 51 >>> >>> >>>Fritz 7 does not see the rook sacrifice in a short amount of time. Here's what >>>I think is the main line: >>> >>>1.Rxg7 Rxg7 2.Kxh6 Rg8 3.Kh7 Rb8 4.g7 Kf7 5.e6+ Kxe6 6.g8Q+ Rxg8 7.Kxg8 +- >>> >>> >>>Any program must see in advance that the resulting K&P endgame (see diagram >>>below) is won for White. >>> >>>[d] 6K1/1p6/p3k3/P2p4/2pP4/2P5/1P6/8 b - - Right, and I think they all do favor white starting from this position. >> >> >>1.Rxg7! Rxg7 2.Kxh6 Rg8 >> >> [2...Re7 3.g7 Kf7 4.Kh7 Re8 5.e6+ transposes] >> >>3.Kh7 Rb8 4.g7 Kf7 5.e6+ Kf6 >> >> [5...Kxe6 6.g8Q+ Rxg8 7.Kxg8 +-] >> >>6.g8Q Rxg8 7.Kxg8 Kxe6 8.Kg7 Ke7 9.Kg6 Ke6 10.Kg5 Ke7 11.Kf5 +- > > >Fritz 7, 1.2 GHz AMD, after 3.5+ minutes: > >1.Rf8 Re7 2.Kh4 Rd7 3.Ra8 Re7 4.Kh5 Rc7 > ± (0.88) Depth: 12/22 00:00:00 267kN >1.Rf8 Re7 2.Kh4 Rd7 3.Kg4 Re7 4.Kf4 Kd7 5.Kf5 Kc7 6.Rf7 Kd7 7.e6+ Ke8 8.Rxe7+ > ± (0.75) Depth: 13/24 00:00:00 408kN >1.Rf8 Re7 2.Kh4 Rd7 3.Kg4 Re7 4.Kh5 > ± (0.75) Depth: 14/24 00:00:01 657kN >1.Rf8 Re7 2.Rf1 Kd7 3.b3 cxb3 4.Rb1 Re6 5.Rxb3 Kc7 6.Rb2 b5 7.Rf2 Kc6 8.Rf7 > ± (0.84) Depth: 15/27 00:00:03 1543kN >1.Rf8 Re7 2.Rf1 Kd7 3.b3 cxb3 4.Rb1 Re6 5.Rxb3 Kc7 6.Rb2 b6 7.Rf2 Kd7 8.axb6 > ± (0.94) Depth: 16/27 00:00:04 2194kN >1.Rf8 Re7 2.Rf1 b6 3.axb6 Rb7 4.Rf7 Rxb6 5.Rxg7 Rxb2 6.Ra7 Rh2+ 7.Kg4 Rg2+ 8.Kf3 > ± (0.75) Depth: 17/31 00:00:10 5694kN >1.Re8+! > ± (0.78) Depth: 17/31 00:00:12 6310kN >1.Re8+ Re7 2.Rd8 Rd7 3.Rh8 > ± (0.78) Depth: 18/32 00:00:15 8147kN >1.Re8+ Re7 2.Rd8 Rd7 3.Rh8 > ± (0.78) Depth: 19/34 00:00:23 12365kN >1.Rf8! > ± (0.81) Depth: 19/34 00:00:26 13957kN >1.Rf8 Re7 2.Rf1 Rd7 3.Kg4 b6 4.Rf8 bxa5 5.Ra8 Rb7 6.Rxa6+ Ke7 7.Kf5 h5 8.Rxa5 > ± (1.00) Depth: 20/35 00:00:53 28847kN >1.Rf8 Re7 2.Rf1 Rd7 3.Kg4 Re7 4.b3 cxb3 5.Rb1 b5 6.axb6 Rb7 7.Rxb3 a5 8.Kh5 > ± (1.16) Depth: 21/38 00:02:46 89209kN This is also the line favored by Crafty and some other engines, still this line is a good exercise on rook and pawn game. Dinan
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.