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Subject: Re: Draw detection(crafty)

Author: John Merlino

Date: 11:10:41 02/04/03

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On February 04, 2003 at 08:37:57, Jarkko Pesonen wrote:

>[D] 4k2r/3p4/p3pQ2/6P1/1pq5/7r/PP6/R1KN1R2 w
>
>This is draw , but how do you statically can evaluate that it so?
>
>This was the quiescent position and crafty suggested Nc3 bxc3 and not go for
>repetion(eval 0.09 for crafty statically after these moves but search from this
>position reveals that this loses rook at lest ) and ruffian correctly wanted to
>play Kb1 which was the repeating move.
>
>Anyway ruffian seems to find drawing lines much sooner than crafty.
>Does anyone have a glue why it is so fast.
>It catches draw a few ply earlier than crafty.
>Is there a way fix this in crafty?
>
>Jarkko

Chessmaster 9000 says draw instantly:

Time	Depth	Score	Positions	Moves
0:00	1/3	0.00	1109		1.Kb1 Qd3+ 2.Kc1 Qc4+
0:00	1/4	0.00	4409		1.Kb1 Qd3+ 2.Kc1 Qc4+
0:00	1/5	0.00	14884		1.Kb1 Qd3+ 2.Kc1 Qc4+
0:00	1/6	0.00	51560		1.Kb1 Qd3+ 2.Kc1 Qc4+
0:02	1/7	0.00	155084		1.Kb1 Qd3+ 2.Kc1 Qc4+
0:07	1/8	0.00	592946		1.Kb1 Qd3+ 2.Kc1 Qc4+

jm



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