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Subject: Re: To Vasik Rajlich: Rybka CAN'T win this! Seems serious.....

Author: m.d.hurd

Date: 15:47:14 12/07/05

Go up one level in this thread


On December 07, 2005 at 18:31:46, Sune Larsson wrote:

>On December 07, 2005 at 18:09:38, George Tsavdaris wrote:
>
>>
>>Rybka with black outplayed Toga II 1.1 and reached a position that is a CLEAR
>>win.
>>It's not an endgame with few pieces that is known Rybka has some weakness to
>>mate, but the weakness this time is that Rybka didn't managed to win with a
>>Bishop more and an easy position to play.....
>>
>> The easiest win would be to capture the Knight here but Rybka didn't. This is
>>not a mistake as the game is won anyway easily! But Rybka failed as the 50-moves
>>rule applied........
>>[D]8/5k2/4p1pp/8/1bbPP3/6P1/4NK2/8 b - - 0 45
>>
>/snip
>
> This is very strange. Any 1400-1500 rated human manages this very easily.
>
> /S


This is indeed strange, I tried this position against fritz 9 with the following
result : Rybka won

[Event "ATHLON2400XP, Blitz:5'"]
[Site "n/a"]
[Date "2005.12.07"]
[Round "1"]
[White "Fritz 9"]
[Black "Rybka 1.0 Beta 32-bit"]
[Result "0-1"]
[Annotator "-4.05;-5.00"]
[SetUp "1"]
[FEN "8/5k2/4p1pp/8/1bbPP3/6P1/4NK2/8 b - - 0 1"]
[PlyCount "29"]
[TimeControl "300"]

1... g5 {Both last book move -5.00/13 7} 2. g4 {-4.05/15 7} Bd2 {
(e5) -4.96/14 10} 3. Ng3 {(Kf3) -3.30/14 6} Bf4 {-4.92/14 8} 4. Nh1 {
(Nh5) -3.93/16 14} Bb5 {(Bb3) -4.93/15 9} 5. d5 {(Ng3) -6.04/17 22} Bd6 {
-5.15/14 10} 6. Kf3 {(Ke3) -4.05/15 7} Kf6 {(Ba4) -5.11/14 5} 7. dxe6 {
(Ng3) -4.05/15 7} Kxe6 {-5.61/14 2} 8. Nf2 {(e5) -4.29/16 6} Ke5 {
(Bc5) -5.68/15 5} 9. Nd1 {-5.79/16 7} Bc5 {(Bd3) -5.69/15 5} 10. Nc3 {
(Ne3) -5.87/16 5} Bd3 {-5.72/16 5} 11. Kg3 {(Nd1) -5.87/15 5} Kd4 {
(Bd4) -5.94/15 6} 12. Nd1 {-6.12/14 7} Be2 {(Bxe4) -5.75/16 9} 13. Nf2 {
-7.10/16 7} Ke3 {(Ke5) -6.76/15 9} 14. e5 {(Kg2) -6.60/15 5} Bc4 {-8.58/17 7}
15. Kg2 {(Nd1+) -15.89/15 16} Bd4 {-8.64/15 8} 0-1

Regards

Mike



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