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Subject: Re: Brilliant....#4

Author: John Merlino

Date: 10:59:19 05/08/04

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On May 08, 2004 at 11:54:58, Rob Basham wrote:

>[D]2r2rk1/p1q1bpp1/1p6/n2R4/8/P4N2/1B2QPPP/5RK1 w - - 0 1
>
>White plays....Bxg7...!
>
>Any programs find this neat move?
>
>this is taken from the 24 brilliant moves file....
>
>thanks
>Rob

CM_SKR does not find the move in under five minutes on an AMD 2500+:

Time	Depth	Score	Positions	Moves
0:00	1/3	1.05	1542		1.Re1 Rfe8 2.Qd3 Red8
0:00	1/4	1.05	4948		1.Re1 Rfe8 2.Qd3 Red8
0:00	1/4	1.14	11164		1.Rh5 Nc4 2.Qe4 f5
0:00	1/5	0.86	37834		1.Rh5 Rfe8 2.Rc1 Qd6 3.Qe4 Qg6
0:00	1/5	0.93	73169		1.Ne5 Rfd8 2.Qh5 Bf6 3.Rfd1 Rxd5
					4.Rxd5 Bxe5 5.Bxe5
0:00	1/6	0.93	124141		1.Ne5 Rfd8 2.Qh5 Bf6 3.Rfd1 Rxd5
					4.Rxd5 Bxe5 5.Bxe5
0:02	1/7	0.93	338215		1.Ne5 Rfd8 2.Qh5 Bf6 3.Rfd1 Rxd5
					4.Rxd5 Bxe5 5.Bxe5
0:06	1/8	0.99	1235905		1.Ne5 Rfd8 2.Nd7 Qc6 3.Rfd1 Re8
					4.Ne5 Qc2
0:10	1/8	1.07	1981967		1.Nd2 Bd6 2.Qh5 Rfe8 3.Nf3 Nc4
					4.Bxg7 Kxg7 5.Nd4 Bxa3
0:21	1/9	1.07	4060322		1.Nd2 Bd6 2.Qh5 Rfe8 3.Nf3 Nc4
					4.Bxg7 Kxg7 5.Qg5+ Kh7 6.Qg4 Bf4
1:20	1/10	1.02	16162291	1.Nd2 Rcd8 2.Qg4 f6 3.Qe6+ Rf7
					4.Rc1 Bc5 5.Ne4 Rxd5 6.Qxd5 Qd7
					7.Qh5 Nb3
3:22	1/11	1.34	42112594	1.Nd2 Rcd8 2.Qg4 f6 3.Qe6+ Rf7
					4.Rc1 Bc5 5.Ne4 Rxd5 6.Qxd5 Qb7
					7.Qd8+ Rf8 8.Qd3 Re8

After forcing 1.Bxg7 Kxg7, The King says:

Time	Depth	Score	Positions	Moves
0:00	1/3	-0.02	3248		2.Qe4 Rh8 3.Qg4+ Kf8 4.Re1 Bxa3
0:00	1/4	0.26	8212		2.Qe4 Rh8 3.Qd4+ Kg8 4.Rd7
0:00	1/4	0.64	32367		2.Ne5 Bf6 3.Qg4+ Kh8 4.Nc6
0:00	1/5	0.85	59185		2.Ne5 Rfd8 3.Qg4+ Kf8 4.Nd7+ Rxd7
					5.Rxd7 Qc4
0:00	1/6	0.78	116432		2.Ne5 Rcd8 3.Qg4+ Kh8 4.Nd7 f5
					5.Qh5+ Kg7 6.Rfd1
0:01	1/7	0.94	366053		2.Ne5 Rfd8 3.Qg4+ Kf8 4.Nd7+ Rxd7
					5.Rxd7 Qc4 6.Qh5 Bf6 7.Rxa7
0:05	1/8	1.06	1015121		2.Ne5 Rfd8 3.Qg4+ Kf8 4.Nd7+ Rxd7
					5.Rxd7 Qc3 6.Rxa7 Rd8 7.Qh5
0:13	1/9	0.71	2728844		2.Ne5 Rfd8 3.Qg4+ Kf8 4.Nd7+ Rxd7
					5.Rxd7 Qc3 6.Qh5 Nc6 7.Qh7 Ke8
0:47	1/10	1.05	10084575	2.Ne5 Rfd8 3.Qh5 Bf6 4.Nd7 Rxd7
					5.Qg4+ Kf8 6.Rxd7 Qc4 7.Qh5 Re8
					8.Rfd1
2:28	1/11	1.35	31909196	2.Ne5 Rfd8 3.Qg4+ Kf8 4.Qf5 Bxa3
					5.Nd7+ Rxd7 6.Rxd7 Qc4 7.Rxa7 Bb2
					8.Rxf7+ Qxf7 9.Qxc8+ Qe8 10.Qf5+
					Qf7 11.Qg5

So, maybe given a very long think CM_SKR would find it -- or maybe not.

jm



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