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Subject: Re: Difficult for Crafty?

Author: Chris Taylor

Date: 04:34:41 05/03/04

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On May 03, 2004 at 03:41:19, Bernhard Bauer wrote:

>The following position is from BT2630, pos24.
>Old versions of Crafty solved it fast.
>
>[D]R7/3p3p/8/3P2P1/3k4/1p5p/1P1NKP1P/7q w
>
>Is this position special?
>
>Kind regards
>bernhard

All ChessBase versions of Crafty.
Plenty of Hash!
AMD 3000 Also browsing at the same time.
Truncated to where the move shows itself

New game
R7/3p3p/8/3P2P1/3k4/1p5p/1P1NKP1P/7q w - - 0 1

Analysis by Crafty 14.12:

1.g6 hxg6 2.Ra1 Qg2 3.Rg1 Kxd5 4.Rxg2 hxg2 5.Nf3 Kc4 6.Ng1 d5 7.Kf3 d4 8.Kxg2 d3
9.Nf3
  ±  (1.29)   Depth: 15   00:04:40  95891kN
  +-  (1.64)   Depth: 15   00:04:46  301324kN

(Taylor, Notts 03.05.2004)


New game
R7/3p3p/8/3P2P1/3k4/1p5p/1P1NKP1P/7q w - - 0 1

Analysis by Crafty 15.20:

1.g6 hxg6 2.Ra1 Qg2 3.Rg1 Kxd5 4.Nf3 Ke4 5.Rxg2 hxg2 6.Ng5+ Kf4 7.Nh3+ Kg4 8.Ng1
d5 9.f3+ Kf5 10.Nh3
  ±  (1.03)   Depth: 10   00:00:12  12498kN
  +-  (3.25)   Depth: 15   00:01:51  128572kN

(Taylor, Notts 03.05.2004)


New game
R7/3p3p/8/3P2P1/3k4/1p5p/1P1NKP1P/7q w - - 0 1

Analysis by Crafty 16.15:

1.g6 hxg6 2.Ra1 Qg2 3.Rg1 Kxd5 4.Rxg2 hxg2 5.Nf3 Ke4 6.Ng1 d5 7.f3+ Kd4 8.h4
  ±  (1.05)   Depth: 10   00:00:06  6018kN
  ±  (1.35)   Depth: 14   00:00:33  38393kN

(Taylor, Notts 03.05.2004)

New game
R7/3p3p/8/3P2P1/3k4/1p5p/1P1NKP1P/7q w - - 0 1

Analysis by Crafty 18.07:

1.g6 hxg6 2.Ra1 Qg2 3.Rg1 Kxd5 4.Rxg2 hxg2 5.Nf3 Kc4 6.Ne5+ Kd4 7.Nf3+ Ke4
  ±  (0.77)   Depth: 10/23   00:00:04  4586kN
  ²  (0.66)   Depth: 11/27   00:00:05  5074kN
1.Ra1 Qg2 2.Ra5 Ke5 3.Rb5 Kf4 4.Rxb3 Qxd5 5.Rxh3 Qe6+ 6.Re3 Qa6+ 7.Ke1 Kxg5
  ²  (0.69)   Depth: 11/27   00:00:06  7204kN
1.Ra5 Ke5 2.Nf3+ Kf4 3.Ra4+ Kf5 4.Rb4 Qb1 5.Rxb3 Qe4+ 6.Kd2 Qxd5+ 7.Rd3 Qa2
8.Rxd7 Qxb2+ 9.Ke3 Qb3+ 10.Rd3 Qe6+ 11.Kd4
  ±  (0.76)   Depth: 11/27   00:00:07  8829kN
  ²  (0.52)   Depth: 13/29   00:00:16  19795kN
1.Ra1 Qg2 2.Nf3+ Ke4 3.Ra4+ Kxd5 4.Rd4+ Kc6 5.Rc4+ Kb5 6.Rc3 Kb4 7.Rd3 h6 8.gxh6
Qg6 9.Rd4+ Kc5
  ²  (0.63)   Depth: 13/29   00:00:23  28646kN
1.g6 hxg6 2.Ra1 Qg2 3.Rg1 Kxd5 4.Rxg2 hxg2 5.Nf3 Ke4 6.Ng1 d5 7.f3+ Ke5 8.Kd3
  ±  (0.78)   Depth: 13/29   00:01:41  127477kN
  ±  (1.18)   Depth: 14/35   00:01:53  141927kN

(Taylor, Notts 03.05.2004)

New game
R7/3p3p/8/3P2P1/3k4/1p5p/1P1NKP1P/7q w - - 0 1

Analysis by Crafty 19.12:

1.g6 hxg6 2.Ra1 Qg2 3.Rg1 Kxd5 4.Rxg2 hxg2 5.Nf3 Kc4 6.Ng1 d5 7.Kf3 Kd3 8.Kxg2
Kc2 9.Kf3 Kxb2
  ²  (0.63)   Depth: 16/36   00:30:04  2029063kN, tb=22
  ²  (0.64)   Depth: 16/36   00:30:33  2066597kN, tb=22

(Taylor, Notts 03.05.2004)






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