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Subject: Re: Rybka test position

Author: Stuart Cracraft

Date: 16:47:30 12/12/05

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On December 12, 2005 at 00:20:44, K. Burcham wrote:

>
>How long does it take your program to play Qxe5 with + eval for black?
>Rybka played this move and won in short time control.
>Game below.
>
>2200 mhz Athlon
>764 pin
>
> [D] 2kr2nr/pp3pp1/2p1p2p/4N2q/2PPN1P1/3Q4/PP3P2/2KR4 b - - 0 1
>

A little under 2 minutes on a Pentium M that was doing other things...

I would like to know the tricks that programs like Rybka and other
programs use to achieve their "fast finds".

Alpha=2548 Beta=3349 Maxdepth=999 MaxTime=9999999
Itr/Max Mv   Time   Score Nodes PV
 1/ 4  h5h3  0.00 2549       66 Ph5h3
 2/ 4< h5h3  0.01 2148      207 Th5h3 Te5f7
 2/ 6  h5h4  0.01 1951      640 Ph5h4 Pe5f7
 3/ 7> h5h4  0.03 2351     1829 Th5h4 Te5f7 Th4g4
 3/ 7  h5h2  0.05 2916     3269 Ph5h2 Pd3f3 Pf7f6
 4/11  h5h2  0.10 2924     7957 Ph5h2 Pd3f3 Pf7f6 Pe5d3
 5/11< h5h2  0.17 2523    14075 Th5h2 Td3f3 Tf7f6 Td1h1 Th2h1 Tf3h1
 5/11  h5h2  0.33 1946    26606 Ph5h2 Pd3d2 Pg8f6 Pe4f6 Pg7f6 Pe5f7
 6/13  h5h2  0.59 1920    48018 Ph5h2 Pd3d2 Pc6c5 Pe4c5 Pd8f8 Pc5e4
 7/17  h5h2  1.88 1898   172657 Ph5h2 Pd3d2 Ph8h7 Pe5f7 Pd8d7 Pf7e5 Pd7d8
 8/22< h5h2  6.22 1497   559816 Th5h2 Td3d2 Tc6c5 Te4c5 Th8h7 Tc1b1 Td8f8
 8/22  h5h2  7.58 1497   683062 Th5h2 Te4c5 Tmtmt
 9/23< h5h2 24.59 1096  1858181 Th5h2 Te4c5 Th2f2 Te5f7 Th8h7 Tc1b1 Td8f8
 9/24  h5h2 41.61 979  3330901 Ph5h2 Pd3f3 Pf7f5 Pg4f5 Pd8d4 Pd1d4 Ph2e5 Pe4d6
Pc8b8 Pd4d1 Pe6f5 Pf3
f5
10/27< h5h2 72.94 578  5756838 Th5h2 Td3f3 Tf7f5 Tg4f5 Td8d4 Td1d4 Th2e5 Te4d6
10/31  h5e5 108.23 29  8774487 Ph5e5 Pd4e5 Pd8d3 Pd1d3 Pf7f6 Pe4d6 Pc8c7 Pd6e8
Pc7c8 Pe8g7 Pf6e5 Pg7
e6
11/31  h5e5 166.31 29 13829225 Ph5e5 Pd4e5 Pd8d3 Pd1d3 Pf7f6 Pe4d6 Pc8c7 Pd6e8
Pc7c8 Pe8d6
12/36  h5e5 370.36 29 32233634 Ph5e5 Pd4e5 Pd8d3 Pd1d3 Pf7f6 Pe4d6 Pc8c7 Pd6e8
Pc7c8 Pe8d6
13/37  h5e5 787.59 29 69824172 Ph5e5 Pd4e5 Pd8d3 Pd1d3 Pf7f6 Pe4d6 Pc8c7 Pd6e8
Pc7c8 Pe8d6
14/



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