Author: Uri Blass
Date: 01:26:43 07/15/03
Go up one level in this thread
On July 14, 2003 at 19:53:45, ALI MIRAFZALI wrote:
>On July 14, 2003 at 16:09:57, George Tsavdaris wrote:
>
>>On July 14, 2003 at 12:57:07, ALI MIRAFZALI wrote:
>>
>>>The following diagram is from the game Polugayevsky vs E Torre London 1984
>>>[D]rn1qr1k1/1p2bppp/p3p3/3pP3/P2P1B2/2RB1Q1P/1P3PP1/R5K1 w
>>>Here white played 19.Bxh7+.This is found by Chessmaster 8000 after 2 hours and
>>>38 minutes at 1800MHZ.Here is the info:
>>>Time Score Positions Depth Moves
>>>2:38:37 0.39 1828329861 13 Bxh7+ Kxh7 Qh5+ Kg8 Rg3 Bf8 Bg5 Qc8 Rc1
>>> Nc6 Bf6 Nxd4 Rxc8 R(a)xc8 Qd1 Rc4 Bg5
>>>Now the amazing thing is that Chessmaster 9000 never gets 19.Bxh7+ even at
>>>16 plys and beyond.Here is how the actual game ended:19.Bxh7+ Kxh7 20.Qh5+ Kg8
>>>21.Rg3 g6 22.Rxg6 fxg6 23.Qxg6+ Kh8 24.Qh6+ Kg8 25.Qxe6+ Kh8 26.Qh6+ Kg8 27.Qg6+
>>>Kh8 28.Qh5+ Kg8 29.Bh6 Bf8 30.Qg6+ Kh8 31.Bxf8 Rxf8 32.Qh6+ Kg8 33.Ra3
>>>{Black Resigns}
>>>Perhaps CM9000 represents only a very minor improvement over CM8000.
>>
>>CM9000 is clearly much stronger from CM8000 in playing strength. Even if
>>you had 30 positions where CM8000 would solve it, while CM9000 not, that
>>would not mean CM8000 is better.
>I am not sure what you mean by much stronger.Johan himself only estimates about
>30 points improvement.
I do not know when did he give that estimate.
And no I do not have 30 positions but a small subset.But
>greek gift sacrafices should be obvious to programs at this level and it is
>surprizing that CM 9000 did not see it.
CM 8000 saw only 0.39 pawns for white.
I do not think that there is something obvious for programs here.
Uri
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.