Author: José Carlos
Date: 06:08:30 10/25/01
Go up one level in this thread
On October 22, 2001 at 06:49:03, Andrew Williams wrote:
>On October 21, 2001 at 18:22:26, Jon Dart wrote:
>
>>Recently Arasan had this position against Postmodernist:
>>
>>[D] 8/6P1/2B2n2/p4P2/P2k4/1pp5/1K6/8 w - -
>>
>>White played Kc1 and lost after ... c2 64. Kd2 Kc4 65. Bb5+ Kb4 66. Bd3 Kxa4
>>67. Bc4 Ka3 68. Kc1.
>>
>>I think White is dead after Kc1 and has to play Kxb3 here. But it seems to be
>>extraordinarily difficult for a number of programs, including mine, to see that
>>this is bad.
>
>PM was expecting Kxb3 and would have replied Kd3, with a score of +1.41
>
>>
>>Even at this point:
>>
>>[D] 8/6P1/2B2n2/p4P2/P1k5/1p6/2pK4/8 w - -
>>
>>Crafty keeps predicting a draw, with the pv Bb5+ Kb4 Bd3 Ng8 Kc1 Kc5 Bb5 Kd4 Kd2
>>Nf6 Bc6. Arasan's score goes - after about ply 12 but it doesn't see disaster.
>>Hiarcs, however, seems to figure this out pretty fast.
>>
>>--Jon
>
>I've tried this position on my PIII-450 at work. The AMD 1200 at home is
>approximately 4 times faster. PM's score is never positive for this second
>position. The score is down at -2.07 after ply 14. The PV is:
>
>14= -207 115s 5927918 1.Bb5 Kb4 2.Bd3 Kxa4 3.Kc1 Kb4 4.Bxc2 bxc2
5.Kxc2 a4 6.Kb1 Ng8
Averno fails low at ply 14 too:
13 0.04 203.71 73904809 c6g2 f6g8 g2a8 g8f6 a8h1 -
14 -2.22 271.92 101715743 c6g2 c4b4 g2d5 b4a3 g7g8R f6g8 d2c1
g8e7 d5e4 a3a2 c1d2 a2b2 e4c6 a3b4
14 -1.96 341.35 129303797 c6b5!
14 -0.94 343.94 130498322 c6b5!
14 -0.94 343.94 130498322 c6b5 c4b4 b5d3 b4a4 d2c1 a4b4 d3c2 b3c2
c1c2 b4c4 c2b2 f6g8 b2c2 g8e7
José C.
>In the game, after Bb5 PM got down to depth 16:
>
>16= 165 16s 4167280 65...Kb4 66.Bd3 Kxa4 67.Bc4 Ka3 68.Kc1 a4
> 69.g8=Q Nxg8 70.Bxg8 Ka2 71.f6 Ka1
>
>In both cases, the PVs are incomplete.
>
>Regards
>
>Andrew
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