Author: Paulo Soares
Date: 00:13:41 05/24/99
Go up one level in this thread
On May 23, 1999 at 18:41:59, Mark Young wrote:
>After looking over the Rebel 10.5 - GM Rohde game with many programs, I finally
>got around to why Hiarcs 7 wants to play 23. Rxb4 instead of the move 23. exd4
>as was played in the game and most other program agree with, giving it a equal
>score or slightly minus score, but all the other programs think 24.Rxb4 is a
>mistake. (Hiarcs7 give 23. Rxb4 a +138, or better then a pawn advantage at +128)
>
>In a effort to see why Hiarcs7 is making this blunder, I played the other
>programs against Hiarcs7 after the move 23. Rxb4. To my surprise all of them
>have lost even though they think 23. Rxb4 is far from the best move and prefer
>23. exd4.
>
>If 23. Rxb4 is losing what is the winning line against this move 23. Rxb4 that
>none of the program I have tried can find.
>
>
>Here is an example of what I am seeing against other programs. Played at 40
>moves in 2 hours. This was Fritz try to bust Hiarcs 7 23. Rxb4.
>
>
>[Event ""]
>[Site ""]
>[Date "1999.04.23"]
>[Round ""]
>[White "HIARCS 7"]
>[Black "Fritz 5"]
>[Result "*"]
>[FEN "1r1qr2k/1p4pp/3p4/1R1B1p2/1pPp4/4P1Pb/1P3P1P/Q3R1K1 w - -"]
>
>{H701: 65472Kb, <3000589b>}
>23. Rxb4 {H7: 10 23.Rxb4 h6 = 138}
>23... dxe3 24. Rxe3 {H7: 11 24.Rxe3 Rxe3 fxe3 b6 Qa7 Bg4 Rb5 Qe8 Kg2 Bh3+
>Kf2 Qd8 = 140}
>24... Rxe3 25. fxe3 {H7: 11 25.fxe3 b6 = 140}
>25... Qe8 26. Kf2 {H7: 11 26.Kf2 b6 Qa7 Qd8 Be6 Bg4 = 172}
>26... Qc8 27. Rb6 {H7: 10 27.Rb6 Ra8 Qd1 Rb8 Qb3 Qf8 Rxb7 Rd8 Rf7 Qe8 Qb7
>Qe5 = 280}
>27... Qd8 28. Rxb7 {H7: 11 28.Rxb7 Rxb7 Bxb7 Kg8 Qa8 Qxa8 Bxa8 Kf7 b4 Ke7 b5
>Kd8 b6 Kc8 Bd5 = 325}
>28... Rxb7 29. Bxb7 {H7: 12 29.Bxb7 Kg8 Qa8 Qxa8 Bxa8 Kf7 b4 Ke7 Bg2 Bg4 b5
>Kd8 b6 Kc8 e4 Kb8 exf5 Bxf5 = 344} and white gos on to win.
Mark,
Good work. I would like to see 23.Rxb4 analyzed by GM Rohde.
Paulo Soares, from Brazil
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.