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Subject: GreKo 2.03: depth 9 (+)

Author: Vladimir Medvedev

Date: 06:37:18 12/26/02

Go up one level in this thread


>How long does your program need to avoid Qxf1?
>
>[D] 1kr5/pp2bNp1/1qb1p3/3n4/P2PN3/1p1B2P1/1B2Q3/R4rK1/w - - ;am Qxf1
>
>In IsiChess some queen-pinned knowledge was helpfull.
>4 seconds to avoid Qxf1 on AMD XP 2.1+ 256MB Hash.

GreKo changes it's mind at depth 9, after 33 seconds.
Hardware: Pentium-III, 600 MHz, 64 MB Hash.
It knows nothing about pinning.


 1     33      0       255  1. Qxf1 Rf8 White(1):
 2     43      2      1169  1. Qxf1 Rf8 2. Qf2
 3     24      5      4038  1. Qxf1 Rf8 2. Qf2 Qc7
 4     42     26     26720  1. Qxf1 Rf8 2. Bb5 Nc7 3. Bd3
 5     42     81     93746  1. Qxf1 Rf8 2. Bb5 Nc7 3. Bd3
 6     26    128    148951  1. Qxf1 Rf8 2. Qf2 Qb4 3. Nc5 Bf6
 7     22    416    496575  1. Qxf1 Rf8 2. Be2 Qb4 3. Bb5 a6 4. Bxc6 bxc6
 8     16   3298   3580934  1. Rxf1 Bxa4 2. Ned6 Rc6 3. Ne8 Rc2 4. Qe5+ Ka8 5.
Bxc2 bxc2
 9    -10   7639   8506587  1. Rxf1 Bxa4 2. Neg5 Rc6 3. Ne5 Rc2 4. Bxc2 bxc2 5.
Nc4 Bb5



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