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Subject: Re: Buggy eval from shredder 8

Author: Vincent Lejeune

Date: 13:25:18 09/18/04

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On September 18, 2004 at 15:34:53, John Merlino wrote:

>On September 18, 2004 at 10:19:00, Vincent Lejeune wrote:
>
>>
>>[d]2k4r/1pp2pp1/pbp5/7p/1P2P1bq/5P1P/P1PQ1P2/1RB1R1K1 w - - 0 17
>>
>>Analysis by Shredder 8:
>>17.fxg4 hxg4 18.Te3 g3 19.fxg3 Fxe3+ 20.Dxe3 Dxh3 21.Rf2 Dh2+ 22.Rf3 Dh1+ 23.Rf4
>>Th6 24.e5 g5+ 25.Rf5 Df1+ 26.Re4 Dc4+ 27.Dd4 Dxc2+ 28.Dd3 Dg2+ 29.Df3 Dxa2
>>30.Dxf7 Dxf7 31.Fxg5
>>  -+  (-3.56)   Profondeur: 16/51   00:02:08  52130kN
>>
>>This -3.56 is totally unrealistic, even Shredder is unable to find a score lower
>>than -1.00  in folling moves !!!
>>
>>the game :
>>
>>[Event "Blitz:2'"]
>>[Site "MyTown"]
>>[Date "2004.09.17"]
>>[Round "?"]
>>[White "Pierre"]
>>[Black "Vin"]
>>[Result "*"]
>>[PlyCount "41"]
>>
>>1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O Bg4 6. d3 h5 7. Nbd2 Qf6 8.
>>Re1 Bc5 9. Rb1 Ne7 10. b4 Bb6 11. h3 Ng6 12. d4 O-O-O 13. dxe5 Nxe5 14. Qe2
>>Rxd2 15. Qxd2 Nxf3+ 16. gxf3 Qh4 17. fxg4 hxg4 18. Re3 g3 19. fxg3 Bxe3+ 20.
>>Qxe3 Qxh3 21. Kf2 *
>
>The big disaster in the PV from Shredder is 30.Qxf7??. This move, of course,
>loses instantly for White. 30.Rb3 might win for White.

I think the problem is not 30.Qxf7 because this move doesn't appear in the 10
previsous best lines.


>
>As for the initial position, CM9_SKR says draw all the way:
>
>Time	Depth	Score	Positions	Moves
>0:00	1/3	-7.64	590		17.hxg4 hxg4 18.Qd8+ Kxd8
>0:00	1/3	1.94	793		17.fxg4 Qg3+ 18.Kf1 Qxh3+ 19.Ke2
>					hxg4
>0:00	1/4	1.94	10740		17.fxg4 Qg3+ 18.Kf1 Qxh3+ 19.Ke2
>					hxg4
>0:00	1/5	1.50	24761		17.fxg4 Qg3+ 18.Kf1 Qxh3+ 19.Ke2
>					Qxg4+ 20.Kf1 Qh3+ 21.Kg1
>0:00	1/6	1.05	47599		17.fxg4 Qg3+ 18.Kf1 Qxh3+ 19.Ke2
>					Qxg4+ 20.f3 Qg2+ 21.Kd1 Qxf3+ 22.Qe2
>0:00	1/7	0.00	61620		17.fxg4 Qg3+ 18.Kf1 Qxh3+ 19.Ke2
>					Qxg4+ 20.Kf1 Qh3+ 21.Kg1 Qg3+ 22.Kf1
>					Qh3+
>0:00	1/8	0.00	106705		17.fxg4 Qg3+ 18.Kf1 Qxh3+ 19.Ke2
>					Qxg4+ 20.Kf1 Qh3+ 21.Kg1 Qg3+ 22.Kf1
>					Qh3+
>0:01	1/9	0.00	196408		17.fxg4 Qg3+ 18.Kf1 Qxh3+ 19.Ke2
>					Qxg4+ 20.Kf1 Qh3+ 21.Ke2 Qg4+
>0:01	2/10	0.00	370968		17.fxg4 Qg3+ 18.Kf1 Qxh3+ 19.Ke2
>					Qxg4+ 20.Kf1 Qh3+ 21.Ke2 Qg4+
>0:04	2/11	0.00	887329		17.fxg4 Qg3+ 18.Kf1 Qxh3+ 19.Ke2
>					Qxg4+ 20.Kf1 Qh3+ 21.Ke2 Qg4+
>0:09	2/12	0.00	2245450		17.fxg4 Qg3+ 18.Kf1 Qxh3+ 19.Ke2
>					Qxg4+ 20.Kf1 Qh3+ 21.Ke2 Qg4+
>0:49	3/13	0.00	12246266	17.fxg4 Qg3+ 18.Kf1 Qxh3+ 19.Ke2
>					Qxg4+ 20.Kf1 Qh3+ 21.Ke2 Qg4+
>
>jm



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