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Subject: Re: Test Position -- Keres v Byrne, San Antonio 1972

Author: Christian Koch

Date: 14:02:34 12/17/03

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On December 17, 2003 at 16:31:58, John Merlino wrote:

>[D]4r1k1/2q1pp2/3n2pp/2rPR3/pp4P1/1P2QR1P/1P2NP2/6K1 w - - 0 29
>
>Black has just played 28...a4, which loses by a tempo. How long does it take
>your engine to see that White has won (times for both scores above +1, and then
>scores above +2 might be interesting) and that the potential outside passed pawn
>for Black will not be a factor?
>
>The game continued: 29.Qxh6 a3 30.bxa3 bxa3 31.Rg5! a2 32.Rxf7! a1=Q+ 33.Kg2 and
>Black resigned.
>
>Here is what CM9000, SKR personality, says on a P4-2.4:
>
>Time	Depth	Score	Positions	Moves
>0:00	1/3	0.39	1530		29.Qxh6 a3 30.bxa3 bxa3
>0:00	1/4	0.25	6169		29.Qxh6 a3 30.bxa3 bxa3 31.Nd4
>					Rc1+ 32.Kh2
>0:00	1/5	0.16	29720		29.Qxh6 a3 30.bxa3 bxa3 31.b4 a2
>					32.Ra3 Rc2
>0:00	1/6	0.26	140272		29.Qxh6 axb3 30.Nd4 Nb5 31.d6 Rc1+
>					32.Kh2 Qxd6
>0:01	1/7	0.00	440005		29.Qxh6 a3 30.bxa3 bxa3 31.Nd4
>					Nb5 32.Re6 Nxd4 33.Rxg6+ fxg6 34.Qxg6+
>					Kh8 35.Qh6+ Kg8 36.Rf8+ Rxf8 37.Qg6+
>					Kh8 38.Qh6+ Kg8
>0:03	1/8	0.10	1102392		29.Qxh6 a3 30.bxa3 bxa3 31.Nd4
>					Nf5 32.Rfxf5 Rc1+ 33.Kg2 gxf5 34.Rxf5
>0:17	1/9	1.14	6173474		29.Qxh6 e6 30.Nd4 a3 31.Nxe6 fxe6
>					32.Rxe6 Qg7 33.Qxg7+ Kxg7 34.Rxd6
>					axb2 35.Rd7+ Kh6
>1:29	1/10	2.56	31643541	29.Qxh6 a3 30.bxa3 bxa3 31.Rg5
>					Qb6 32.Rxg6+ fxg6 33.Qxg6+ Kh8
>					34.Qh6+ Kg8 35.Rf5 Nxf5 36.Qxb6
>					a2 37.Qe6+ Kh8 38.Qe5+ Ng7 39.Nf4
>2:53	1/11	2.72	60450631	29.Qxh6 a3 30.bxa3 bxa3 31.Rg5
>					Rc6 32.dxc6 a2 33.Rxf7 a1=Q+ 34.Kg2
>					Qxc6+ 35.Rf3 Qxf3+ 36.Kxf3 Qf6+
>					37.Kg2 Kf7 38.Qh7+ Qg7 39.Qxg7+
>					Kxg7
>
>My apologies if this position is too easy. I just thought it was interesting....
>
>jm


Ruffian 1.0.5  UCI 119 MB:
 1   00:00  1,42   b3xa4
 1   00:00  1,52   Qe3xh6
 2   00:00  1,41   Qe3xh6 Nd6f5
 3   00:00  1,06   Qe3xh6 a4a3 b2xa3 b4xa3
 4   00:00  0,99   Qe3xh6 a4xb3 Rf3xb3 Nd6f5 Qh6f4
 5   00:00  0,86   Qe3xh6 Nd6f5 Qh6f4 f7f6 Re5xf5 g6xf5 b3xa4 f5xg4 Qf4xg4+
 6   00:00  0,73   Qe3xh6 a4xb3 Rf3xb3 Nd6f5 Qh6f4 Rc5c4 Qf4h2
 7   00:00  0,52   Qe3xh6 a4a3 b2xa3 b4xa3 b3b4 a3a2 Rf3a3 Rc5c2 Ne2d4
 8   00:01  0,27   Qe3xh6 a4a3 b2xa3 b4xa3 b3b4 a3a2 Rf3a3 Rc5c2 g4g5 Re8c8
 9   00:02  0,00   Qe3xh6 a4a3 b2xa3 b4xa3 Re5e6 f7xe6 Qh6xg6+ Kg8h8 Qg6h6+
Kh8g8 b3b4 a3a2 Qh6g6+ Kg8h8 Qg6h6+ Kh8g8
10+  00:08  0,35   Qe3xh6
10   00:29  1,89   Qe3xh6 a4a3 b2xa3 b4xa3 Re5g5 e7e5 Rf3f6 Rc5c1+ Ne2xc1
Qc7xc1+ Kg1h2 Qc1c5 b3b4 Qc5xd5
11   01:02  2,05   Qe3xh6 a4a3 b2xa3 Nd6c4 Re5g5 Nc4e5 Rf3e3 b4xa3 Re3xe5 Qc7xe5
Rg5xe5 a3a2 Re5xe7 a2a1Q+
12+  02:17  2,40   Qe3xh6
12   04:38  3,07   Qe3xh6 a4a3 b2xa3 Rc5c2 a3xb4 Rc2a2 Rf3e3 Qc7c2 Kg1h2 Qc2d2
f2f3 Qd2xb4 Re5xe7 Re8xe7 Re3xe7 Qb4xb3





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