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

Author: John Merlino

Date: 13:31:58 12/17/03


[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



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