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Subject: Re: search depth ==1 tournament complete 36 rounds

Author: Drexel,Michael

Date: 08:17:54 12/21/05

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On December 20, 2005 at 20:49:11, Mike Byrne wrote:

>Time Control Search depth ==1
>
>I set this tournament up because in playing Rybka at sd==1, it seemed to be that
>Rybka was unsually strong at this level, much stronger tha other engines, I
>usually my hold against engines when search depth==1 - that is not true against
>Rybka.  Here are the results.
>
>Ponder off , common book for all engines, common hash.
>
>Rybka is clearly doing some extra things at sd==1 that other engines are not
>doing.
>
>Quad round robin ( 36 rounds)
>
>   Engine                Score  Ry   Za   SO   He   Sh   An   Mi   Pr   Ru   Cr
>1  Rybka v1.0 Preview.x64 34.5 ···· 1111 11=1 1111 1111 1011 1111 1111 1111 1111
>2  Zappa                  19.5 0000 ···· =01= 1=== 111= 0=10 0010 0=11 111= 1011
>3  SOS 5.1 for Arena      18.5 00=0 =10= ···· 10=1 1010 111= 0110 1101 ==00 0011
>4  Hermann 1.5            18.5 0000 0=== 01=0 ···· 11== =101 0111 01=1 =0== 1011
>5  Shredder8              16.5 0000 000= 0101 00== ···· 1=11 =1=1 0101 1010 1=10
>6  AnMon 5.50             16.0 0100 1=01 000= =010 0=00 ···· 0110 1100 =111 10=1
>7  Michael Byrne {Human}  15.5 0000 1101 1001 1000 =0=0 1001 ···· 100= 1=10 1=01
>8  Pro Deo                15.0 0000 1=00 0010 10=0 1010 0011 011= ···· 0101 11=0
>9  Ruffian 1.0.5          14.0 0000 000= ==11 =1== 0101 =000 0=01 1010 ···· 0==1
>10 Crafty64               12.0 0000 0100 1100 0100 0=01 01=0 0=10 00=1 1==0 ····
>
>180 games played / Tournament finished
>Name of the tournament: RoundRobin
>Site/ Country: WIN-64-MB, United States
>Level: 1 Half moves
>Hardware: Dual AMD Opteron(tm) Processor 244 1804 MHz with 2,046 MB Memory
>Operating system: Microsoft Windows Server 2003 Professional Service Pack 1
>(Build 3790)
>
>
>12/20/2005 8:32:46 PM :
>
>I played my games (human) at about 5"/min per game pace.  My rating is about
>1600, so I set elostat with me at 1600.  Rybka is playing over 400 point
>stronger than the next engine at sd==1.

I doubt your rating is 1600 ELO if you only scored 1/4 against Shredder 8 at
search depth 1. Maybe you made some setup mistake (ponder on for example)?

Here is a test game against Shredder 8 CB at search depth 1:

[Event "Blitz:1'"]
[Site "?"]
[Date "2005.12.21"]
[Round "?"]
[White "Michael"]
[Black "Shredder 8"]
[Result "1-0"]
[ECO "D00"]
[Annotator ""]
[PlyCount "35"]
[TimeControl "60"]

{64MB, Fritz9.ctg, ATHLONXP} 1. d4 {0} d5 {0} 2. c3 {(Sf3) 2} Nf6 {0} 3. Bg5 {
(Lf4) 2} Ne4 {0} 4. Bf4 {(Sf3) 2} Bg4 {-0.89/1 0} 5. f3 {(Sf3) 3} e5 {-0.67/1 0
} 6. dxe5 {(Lxe5) 2} Qh4+ {-0.57/1 0} 7. g3 {1} Nxg3 {2.76/1 1} 8. Bxg3 {2} Qg5
{6.25/1 2} 9. fxg4 {2} c6 {5.74/1 2} 10. h3 {(Lh3) 3} Qe3 {4.83/1 0} 11. Nf3 {3
} Bc5 {4.66/1 3} 12. Qd2 {(Lg2) 4} Qe4 {5.51/1 0} 13. Qd3 {(Lg2) 4} Qa4 {
5.95/1 0} 14. b3 {(Lg2) 11} Qa5 {6.08/1 0} 15. b4 {(Lg2) 3} Bxb4 {8.78/1 0} 16.
cxb4 {2} Qxb4+ {8.57/1 2} 17. Qc3 {(Sc3) 10} Qe4 {7.98/1 0} 18. Nbd2 {(Lg2) 2}
1-0

It is incredibly weak.

Michael


>
>    Program                    Elo    +   -   Games   Score   Av.Op.  Draws
>
>  1 Rybka v1.0 Preview.x64   : 2133   55 253    36    95.8 %   1589    2.8 %
>  2 Zappa                    : 1669  102 101    36    54.2 %   1640   25.0 %
>  3 SOS 5.1 for Arena        : 1652  105 105    36    51.4 %   1642   19.4 %
>  4 Hermann 1.5              : 1652   97  97    36    51.4 %   1642   30.6 %
>  5 Shredder8                : 1617  105 106    36    45.8 %   1646   19.4 %
>  6 AnMon 5.50               : 1608  107 108    36    44.4 %   1647   16.7 %
>  7 Michael Byrne {Human}    : 1600  109 111    36    43.1 %   1648   13.9 %
>  8 Pro Deo                  : 1591  111 113    36    41.7 %   1649   11.1 %
>  9 Ruffian 1.0.5            : 1573  100 102    36    38.9 %   1651   27.8 %
> 10 Crafty64                 : 1535  110 114    36    33.3 %   1655   16.7 %



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