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Subject: Re: ECM........#28.....RxN.....!?

Author: John Merlino

Date: 22:17:32 05/10/04

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On May 10, 2004 at 18:03:37, Vincent Lejeune wrote:

>On May 10, 2004 at 17:02:11, Rob Basham wrote:
>
>>ECM......#28
>>
>>
>>[D]r1b2rk1/2q2ppp/2pbp3/p7/4Nn2/3B4/PPPBQ1PP/R4R1K w - - 0 1
>>
>>
>>The move they want here is RxN....!?
>>
>>has anyone worked on this one?
>>I do not see how that is a win....:-)
>>
>>Rob
>
>After the only line :
>
>1. Rxf4 Bxf4 2. Nf6+ gxf6 3. Qg4+ (note a transposition is possible : 1. Nf6+
>gxf6 2.Rxf4 Bxf4 ...)
>
>
>here's what Chessmaster 9000-SKR and Shredder 8 say :
>
>Time	Depth	Score	Positions	Moves
>4:50	1/14	0.10	114267479	3...Kh8 4.Bxf4 f5 5.Qg3 Qb7 6.Bd6
>					Bd7 7.Rd1 f6 8.Bxf8 Rxf8 9.Bf1
>					Bc8 10.b3 c5 11.Bc4
>3:41	1/14	0.37	86451977	3...Bg5 4.Bxg5 f5 5.Qh4 f6 6.Bxf6
>					Qf7 7.Be5 Ba6 8.c4 Rad8 9.Rd1 Qg6
>					10.b3 Qg4
>
>
>Analysis by Shredder 8:
>
>1. = (0.10): 3...Rh8 4.Fxf4 f5 5.Dg3 Db6 6.Fc7 Db7 7.Fd6 Fd7 8.Fxf8 Txf8 9.Dd6
>Tg8 10.De5+ Tg7 11.Td1 c5 12.Ff1 Fe8 13.Td8 Dc6 14.Dc3 a4
>2. ² (0.65): 3...Fg5 4.Fxg5 f5 5.Dh4 f6 6.Fxf6 Df7 7.Fc3 Fa6 8.Fxa6 Txa6 9.Te1
>c5 10.Te3 Tfa8 11.Tg3+ Rf8 12.Fe5 Df6 13.Dxf6+ Re8
>
>In fact this seems not to be winning but 1. Rxf4 (or 1.Nf6+) seems to be the
>best way to play

This is true, and sometimes that's the point of a position in a test suite --
not to find the WINNING move, but simply to find the BEST move.

Also, it looks like you have modified your SKR setting, and are using a
selective search value of at least 13. SKR is supposed to use a value of 12.

jm



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