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

Author: Ulrich Tuerke

Date: 15:20:20 11/21/03

Go up one level in this thread


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.

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.



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