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Subject: Re: Test Position - Avoid Nxa8

Author: Uri Blass

Date: 13:30:20 11/29/02

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On November 29, 2002 at 15:45:51, bobby palacios wrote:

>[D] r1b2b1r/ppNk3p/2n4q/3pp3/4n1pB/8/PPP2PPP/R2QKBNR w KQ - 0 13
>
>A very interesting position aroused between Aristarch 4.4 vs TheKing 3.12(game
>in 25).  After a wild opening, TheKing 3.12 went straight for Aristarch's king,
>at this critical point Aristarch took the rook at a8, instead of the pawn at d5,
>and was crushed.  How many programs avoid Nxa8 at a reasonable time?  (Aristarch
>played Nxa8 after 35 seconds)

Movei can avoid Nxa8 in a very short time(less than one second).

Public movei needs only depth 6 for it and the same for latest movei.

On my pIII850 it needs only 0.66 seconds to fail high and 0.88 seconds
to solve the fail high.

6 3 55 72785 c7a8 f8b4 c2c3 e4c3 b2c3 b4c3 e1e2 c6d4 e2d3 c3a1 d1g4 h6e6
6 4 66 92629 c7d5
6 33 77 100841 c7d5
6 38 88 116476 c7d5 h6h4 d5f6 d7c7 f6e4 c8f5 e4c3
6 38 121 167659 c7d5 h6h4 d5f6 d7c7 f6e4 c8f5 e4c3
7 67 236 323426 c7d5 h6h4 g2g3 h4g5 d5f6 d7c7 f6e4 f8b4 c2c3
7 67 318 447086 c7d5 h6h4 g2g3 h4g5 d5f6 d7c7 f6e4 f8b4 c2c3
8 65 582 799314 c7d5 h6h4 g2g3 h4g5 d5f6 d7c7 f6e4 f8b4 c2c3 g5f5
8 65 1016 1402342 c7d5 h6h4 g2g3 h4g5 d5f6 d7c7 f6e4 f8b4 c2c3 g5f5

Uri



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