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Subject: Re: XiniX is the winner in a certain way

Author: Tony Werten

Date: 23:04:47 10/26/03

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On October 26, 2003 at 14:24:06, Will Singleton wrote:

>On October 26, 2003 at 11:18:43, Djordje Vidanovic wrote:
>
>>In a certain way, XiniX is the winner of the Dutch Open.  Scoring 1.5/2 against
>>the two top-placed programs is quite an achievement.  Congratulations.  The game
>>vs Ruffian was quite an eye-opener for the Ruffian team :-) XiniX, thanks.
>>
>>Djordje
>
>I wonder, had Ruffian played 27...Ng7, if Xinix would have played Rd1 (which
>leads either to a nice win or at least equal game) or Bg5, giving Ruffian the
>advantage.  Tony?

First of all, thanks everybody for the nice words.

After Ng7, XiniX plays Rd1 with a +0,88 score. The main line is as you
suggested, XiniX adds 33. Bxe7 Qxe5 34. Bb4 Qd4

After 7 min a new main lines comes up (with 0,89 score ):

28. Bd2 Qc7 29. Bc3 Ne6 30. a4 b5 31. axb5 axb5 32. Ba5 Qxe5 33. Bxd8 Rxd8 34.
Ra7 Nf4 35. Qd2

But I doubt it would have had the time for that, even with full hashtables.

After 11m21 it changes back to Rd1 with a +1,01 score

Tony

>
>It appears to me that Ruffian's 27.Nc7 was caused, in part, by a hash anomaly.
>With cleared hash, it doesn't consider it; it will play it with hash full,
>though.  I've seen similar behavior with my program, though I don't know the
>reason.
>
>[d]3rn1k1/1p1rpp2/p5p1/q1p1P2p/2P1P3/1P1bB3/P4NPP/R1Q1R1K1 b - - 0 27
>
>27... Ng7 28. Rd1
>  (28. Bg5 Ne6 29. Bh4 Qc7 30. Qc3 g5 31. Bxg5 (31. Rad1 gxh4 32. Nxd3
>  Rd4 =+) 31... Nxg5 32. Re3 Nxe4 33. Nxe4 Bxe4 34. Rxe4 Rd1+ 35. Rxd1 Rxd1+
>  36. Kf2 Qd7 =+)
>28... b5
>  (28... Ne6 29. Qd2 Qxd2 30. Rxd2 Nf8 31. e6 +=)
>  (28... Qb4 29. Bd2!!)
>29. cxb5 Bxb5 30. Rxd7 Rxd7 31. a4 Bc6 32. Bxc5 Ne6 =
>
>
>Ruffian looks like it might play 28...Qb4 after 27...Ng7 28.Rd1, leading to a
>quick loss.  It doesn't consider b5, for some reason.
>
>Will



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