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Subject: Re: Interesting position from Guenther Simon's RWBC

Author: GŁnther Simon

Date: 17:07:39 02/20/04

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On February 20, 2004 at 19:42:51, Anthony Cozzie wrote:

>On February 20, 2004 at 16:59:44, Tim Foden wrote:
>
>>Here is a position that occured between ZCHess 2.22 and Deep Sjeng 1.5 (ZChess
>>was white).
>>
>>Most engines (well the one's we tested anyway!) don't like white here, but
>>ZChess went on to win.
>>
>>[D]2r3k1/R4p2/1p2p1pp/1b1nQ3/3P3P/3q1PN1/5BP1/6K1 w - - 0 1
>>
>>The plan for white of Ne4 Kh2! Be1! Bd2 looks to win every time.  Any other
>>engines see the win for white here?
>>
>>(for the game see Guenther's site http://home.t-online.de/home/g.simon.rgbg/)
>>Cheers, Tim.
>
>It takes a while, but here you go.  Zappa prefers Be3-d2 over Be1-d2, but
>otherwise it is the correct plan, and with a reasonable plus score as well.
>Branching factor of *7* from 13->14 ply though :(
>
>1. Ng3-e4 Rc8-f8 2. Kg1-h2 h6-h5 3. Bf2-g3 Qd3-c2 4. Bg3-f4 Bb5-f1 5. Bf4-d2
>Qc2-b2 6. Kh2-g1 Qb2-b1 7. Bd2-h6 Bf1-e2 8. Kg1-h2
> = (-0.50)	Depth: 13/27	00:01:54.32	108306kN
>1. Ng3-e4++
> + (-0.25)	Depth: 14/28	00:05:14.44	300698kN
>1. Ng3-e4 Qd3-f1 2. Kg1-h2 Bb5-e8 3. Bf2-e3 Rc8-c2 4. Be3-d2 Rc2xd2 5. Ne4xd2
>Qf1-f2 6. Ra7-a8 Qf2xh4 7. Kh2-g1 Qh4-e7 8. Nd2-c4 f7-f6 9. Qe5-d6
> = (0.51)	Depth: 14/28	00:15:18.86	884816kN
>1. Ng3-e4 Qd3-f1 2. Kg1-h2 Bb5-e8 3. Bf2-e3 Rc8-c2 4. Be3-d2 Rc2xd2 5. Ne4xd2
>Qf1-f2 6. Ra7-a8 Qf2xh4 7. Kh2-g1 Qh4-e7 8. Nd2-c4 f7-f6 9. Qe5-b8 Nd5-c7
> = (0.66)	Depth: 15/30	00:26:44.89	1547890kN
>
>anthony

Hi Anthony, try 8.Ne4 again in the line Zappa found and the score
will rise again a lot! It's really astonishing how long all programs
need to see a clear win for White.
BTW the poor victim of this deep position was DeepSjeng 1.6 not 1.5,
but thanks to Tim for posting this game from current Class A in RWBC.

Regards,
GŁnther



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