Author: Jarkko Pesonen
Date: 12:43:24 02/04/03
Go up one level in this thread
Try this
7r/2qpkp2/p3p3/6P1/1p5r/7P/PPP2QK1/R2N1R2 b
position. The earlier was from crafty PV
Jarkko
On February 04, 2003 at 11:40:43, Michel Langeveld wrote:
>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
>
>Nullmover finds correctly:
>{0.19} 4 0 22 29119 1.Kb1 Qd3+ 2.Kc1(1) Qc4+ {132359.07}
>
>0.22 seconds
>29119 nodes
>
>I use beside my normal hashtable an array of all hashkeys.
>A hashkey is always stored in this table and removed after undoing a move.
>I store thing sequental. So after 5 ply I have 5 positions in this table.
>
>The in alphabeta I detect if this positions happens more as 2 times.
>And in the root I look if the positions happened more as 3 times.
>
>Cheers,
>
>Michel
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