Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: Test Position:Extremely Hard:Avoid 15..hxg5(Takes over 19 hours forC

Author: Ulrich Tuerke

Date: 03:34:13 11/22/03

Go up one level in this thread


On November 21, 2003 at 18:23:07, Robert Hyatt wrote:

>On November 21, 2003 at 18:20:20, Ulrich Tuerke wrote:
>
>>Very easy for Crafty. Crafty doesn't consider hxg at all.
>>I think that Robert has some special code to avoid these kinds of traps.
>
>Yep.  We had a player on ICC named "mercilous" that absolutely murdered
>every computer playing there using this attack.  Most just +noplayed him,
>which is a cop-out.  I chose to fix it.  It drove him absolutely nuts trying
>to get Crafty to take the piece.  It wouldn't and it smashed him game after
>game. They are still probably around if you do a "search crafty mercilous".
>
>:)

Not bad. -:)

I wonder whether Crafty won't miss sometimes chances to win a piece in positions
like this. Have you observed games where Crafty had incorrectly refrained from
taking a piece ?

Uli

>
>
>>
>>Analysis by Crafty 18.15:
>>
>>1...d5 2.Ncb5 Bxb5 3.Nxb5 Qc4
>>  ±  (0.88)   Depth: 4/18   00:00:00
>>1...d5 2.Ncb5 Bxb5 3.Bxf6 Bxf6 4.Nxb5
>>  ±  (0.77)   Depth: 5/20   00:00:00
>>1...d5 2.e5 Ne4 3.Qe3 Nxc3+ 4.Qxc3 Re8 5.Bxe7 Rxe7 6.Nxc6 Qxc6
>>  ±  (0.91)   Depth: 6/21   00:00:01  327kN
>>1...d5 2.e5 Ne4 3.Qe3 Rab8 4.Bxe7 Qxe7 5.h5
>>  ±  (1.00)   Depth: 7/22   00:00:02  738kN
>>1...d5 2.e5 Ne4 3.Nxe4 dxe4 4.Re3 Bxg5 5.hxg5 Rac8 6.gxh6 gxh6
>>  ±  (0.92)   Depth: 8/25   00:00:04  1861kN
>>1...d5 2.e5 Ne4 3.Qe3 Nxc3+ 4.Qxc3 Rdc8 5.Bxe7 Qxe7 6.Nxc6 Qd7 7.Nb8 Raxb8
>>  ±  (0.92)   Depth: 9/25   00:00:08  4350kN
>>1...d5 2.e5 Ne4 3.Qe3 Rac8 4.Nxc6 bxc6 5.g4 Rb8 6.Bxe7 Qxe7 7.Nxe4 dxe4
>>  ±  (0.97)   Depth: 10/28   00:00:19  10320kN
>>
>>
>>On November 21, 2003 at 17:13:49, ALI MIRAFZALI wrote:
>>
>>>In the following interesting position it takes over 19 hours for Chessmaster
>>>9000 (default)on my 1.8 gig computer to avoid 15..hxg5 and choose 15..Rac8.
>>>It is my guess that Fritz and Junior will not solve this.
>>>[D]r2r2k1/ppq1bpp1/2bppn1p/6B1/3NPP1P/2N5/PPPQ2P1/1K1RR3 b
>>>Analysis by Chessmaster 9000(default Personality):
>>>Time	Depth	Score	Positions	Moves
>>>0:02	1/9	-1.38	356913		15...hxg5 16.hxg5 Ne8 17.g6 Bf6
>>>					18.Ncb5 Qd7 19.Nxc6 bxc6 20.gxf7+
>>>					Qxf7
>>>0:07	1/10	-1.23	1021400		15...hxg5 16.hxg5 Nd7 17.g6 Nc5
>>>					18.gxf7+ Kxf7 19.f5 e5 20.Nxc6
>>>					bxc6 21.Qe2
>>>0:28	2/11	-1.13	3883272		15...hxg5 16.hxg5 Nh7 17.g6 Nf6
>>>					18.gxf7+ Kxf7 19.f5 exf5 20.exf5
>>>					Kg8 21.Qe2 Re8
>>>1:03	3/12	-1.08	9118689		15...hxg5 16.hxg5 Ne8 17.Qe3 g6
>>>					18.Qh3 Bf8 19.f5 exf5 20.exf5 Bg7
>>>					21.Nxc6 bxc6 22.fxg6 fxg6
>>>2:53	4/13	-0.81	26353616	15...hxg5 16.hxg5 Ne8 17.Rh1 g6
>>>					18.Qd3 Bf8 19.f5 exf5 20.exf5 Bg7
>>>					21.fxg6 Bxg2 22.Rh7
>>>9:47	5/14	-0.59	96074807	15...hxg5 16.hxg5 Ne8 17.Rh1 g6
>>>					18.f5 exf5 19.exf5 Qa5 20.Nxc6
>>>					bxc6 21.fxg6 fxg6 22.Qd4 Ng7 23.Qc4+
>>>					d5 24.Qxc6
>>>41:24	6/15	-0.19	431783244	15...hxg5 16.hxg5 Ne8 17.Rh1 g6
>>>					18.f5 exf5 19.exf5 Qa5 20.Nxc6
>>>					bxc6 21.Qd4 Qe5 22.Qh4 Kf8 23.f6
>>>					Bxf6 24.gxf6 Nxf6
>>>9:17:20	7/16	0.20	1564966390	15...hxg5 16.hxg5 Nxe4 17.Nxe4
>>>					Bxe4 18.Rxe4 d5 19.Ree1 g6 20.g4
>>>					Rac8 21.Rh1 Bf8 22.f5 Re8 23.fxg6
>>>					fxg6 24.Qd3 Qg7 25.Qe3
>>>19:06:13	7/16	-0.29	3080132679	15...Rac8 16.g4 Nxg4 17.Rg1 h5
>>>					18.Rdf1 Bxg5 19.hxg5 e5 20.Nxc6
>>>					bxc6 21.Rh1 exf4 22.Qxf4 Ne5 23.Rxh5
>>>					Qa5
>>>Please indicate your result.



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.