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Subject: Re: WM test bugs / Some Yace analysis

Author: Peter Berger

Date: 15:55:31 06/27/02

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On June 27, 2002 at 14:06:54, Roy Eassa wrote:

>I spent an hour+ with Fritz 7 exploring variations and came to the conclusion
>that 1.c4 is pretty good and with best play gives White an advantage (and a win
>if Black does not play perfectly), but 1.Ba5 *followed by* 2.c4 is a big win for
>White.

Hi Roy,

I checked your analysis and I think you are completely right with your
conclusions.

But I also think this means that this testposition isn't really good at all as
it is too easy to get the "right" move for the wrong reasons here.

Some Yace analysis :

1054856912 30:59.4   0.19 14.  1.c4 Nxb4 2.Qxb4 Nf6 3.Re7 Qc6 4.Rxf7 {HT}
                               {-180}
1304583669 38:29.9   0.24 15t  1.c4 Nxb4 2.Qxb4 Nf6 3.Re7 Qc6 4.Rxf7 Kb8
                               5.Rxg7 Ka7 6.Bf1 Ne4 7.Bg2 Rab8 8.Re7 {HT}
                               {-100}
1584066537 47:00.4   0.25 15t+ 1.Ba5 Kb8 2.c4 Ne7 3.Qc3 Nc6 4.Be4 Qc8 5.Bxc6
                               Qxc6 6.Qxg7 Qf6 7.Qxf6 Rh7 8.Re7 Nxf6 {HT}
                               {-180}
1968519738 58:50.3   0.59 15++ 1.Ba5 Kb8 2.c4 Ne7 3.f5 Nc6 4.Qf4+ Ka7 5.Be4
                               Qe7 6.Bxc6 Qa3+ 7.Kb1 Nf2 8.Rd7 Rhe8 {90}
2062791374 1:01:33   0.59 15t  1.Ba5 Kb8 2.c4 Nge3H 3.Rxe3H Nxe3H 4.Qxe3H Re8H
                               5.Be4H Qe7H 6.Qb6H {HT}
2766445199 1:20:56   0.59 15.  1.Ba5 Kb8 2.c4 Nge3 3.Rxe3 Nxe3 4.Qxe3 Re8
                               5.Be4 Qe7 6.Qb6
4213758463 2:03:54   0.71 16t  1.Ba5 Kb8 2.c4 Rc8 3.Bc2 Qd6 4.Kb2 Qf6+ 5.Kb1
                               Nge3 6.Rxe3 Nxe3 7.Qxe3 Qh4 8.Qe5+ Ka7 9.Qd4+
                               {HT} {-70}
2373675280 3:12:23   0.71 16.  1.Ba5 Kb8 2.c4 Rc8 3.Bc2 Qd6 4.Kb2 Qf6+ 5.Kb1
                               Nge3 6.Rxe3 Nxe3 7.Qxe3 Qh4 8.Qe5+ Ka7 9.Qd4+
                               {HT} {-70}

A buffer overflow in the node count ;-) ?



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