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Subject: Re: Potential Test Positions

Author: Uri Blass

Date: 00:34:28 04/15/03

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On April 15, 2003 at 01:01:22, Ulf Flörsheimer wrote:

>r1b2rk1/pp4pp/4p3/2Ppn1q1/4p3/PNN1P3/1PP1QPPP/R4RK1 b - - 0 1
>
>Here are a the analysis results of a few engines. Others, e.g. Hiarcs 8 or
>Gandalf 4.32h (UCI)don't find Nf3+ in acceptable time.



I suspect that Nf3+ is not the only winning move.
Here is some analysis by movei on p850.

It cannot see positive evaluation for black in a reasonable time and needs depth
13.

Movei fails high later on Nf3+ but the reason is probably more extensions
when Nf3 is a check.

depth=13 +0.50 f8f6 g1h1 f6h6 h2h3 g5f5 b3d4 h6h3 h1g1 f5g6 g2g3 c8d7 g1g2 g6h6
a1e1
Nodes: 207226747 NPS: 162217
Time: 00:21:17.46
depth=13 +0.50 f8f6 g1h1 f6h6 h2h3 g5f5 b3d4 h6h3 h1g1 f5g6 g2g3 c8d7 g1g2 g6h6
a1e1
Nodes: 210928916 NPS: 162599
Time: 00:21:37.23
depth=14 +1.35 f8f6 g1h1 e5f3 g2f3 e4f3 f1g1 g5h5 g1g7 g8g7 e2f1 f6h6 f1g1 h6g6
g1d1 g6g2 d1d4 g7g8
Nodes: 445445811 NPS: 163343
Time: 00:45:27.05
depth=14 +1.36 e5f3
Nodes: 491452148 NPS: 164629
Time: 00:49:45.20

Uri



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