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Subject: Re: BXG7 Kasparov Portish Niksic 1983

Author: John Merlino

Date: 16:00:10 02/02/05

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On February 02, 2005 at 18:46:21, John Jack wrote:

>Hiarcs 9 Finds and makes the BXG7 move 3.80GHZ 256MB of ram What other engine
>make this move

You typically cannot expect people to test a position if you do not give it to
them.

Here it is:

[D]2r2rk1/p1q1bpp1/1p6/n2R4/8/P4N2/1B2QPPP/5RK1 w - - 0 21

Additionally, you do not say how long it took H9 to find the move. Generally,
the information required to get a good idea of how well an engine does on a
position is:

position, engine, engine parameters (if different from the default), CPU, time
to find given move

Other useful information is:

PV, eval, search depth, hash size

CM9_R1 on an AMD 2500 finds this move in 0:20, but then gives it up a few
seconds later. It eventually settles on Rh5 with a fairly good score:

Time	Depth	Score	Positions	Moves
0:00	1/3	1.09	1429		21.Re1 Rfe8 22.Qd3 Red8
0:00	1/4	1.09	4779		21.Re1 Rfe8 22.Qd3 Red8
0:00	1/4	1.15	10688		21.Rh5 Nc4 22.Qd3 f5 23.Rc1
0:00	1/5	0.89	42481		21.Rh5 Rfe8 22.Rc1 Qxc1+ 23.Bxc1
					Rxc1+ 24.Ne1 Nc4 25.Qe4
0:00	1/5	1.02	72737		21.Ne5 Rcd8 22.Rfd1 Rxd5 23.Rxd5
					Rd8 24.Qd3 Rxd5 25.Qxd5
0:00	1/6	1.04	145965		21.Ne5 Rfd8 22.Qh5 Bf6 23.Rfd1
					Rxd5 24.Rxd5 Bxe5 25.Bxe5
0:01	1/7	0.91	335045		21.Ne5 Bf6 22.Rd7 Qc2 23.Rd2 Qf5
					24.Rfd1 Rfe8
0:05	1/8	1.00	1297834		21.Ne5 Bf6 22.Rfd1 Rfd8 23.Rd7
					Rxd7 24.Rxd7 Qc2
0:13	1/9	0.40	3434918		21.Ne5 Qc2 22.Rd2 Qf5 23.Rfd1 Rfe8
					24.Rd5 Rc2 25.R1d2 Rxd2 26.Qxd2
					Bxa3 27.Nxf7 Re1+ 28.Qxe1 Qxd5
					29.Bxa3 Qxf7
0:20	1/9	0.88	5372177		21.Bxg7 Kxg7 22.Ne5 Rfd8 23.Qg4+
					Kf8 24.Nd7+ Rxd7 25.Rxd7 Qc3 26.Rxa7
					Rd8 27.Qh5
0:26	1/9	0.96	6780735		21.Nd2 Bd6 22.g3 Rcd8 23.Bxg7 Rfe8
					24.Qg4 f5 25.Qg6 Qxg7 26.Rxd6 Qxg6
					27.Rxg6+ Kf7
1:09	1/10	0.96	18320629	21.Nd2 Rcd8 22.Qg4 f6 23.Qe6+ Rf7
					24.Rc1 Bc5 25.Ne4 Rxd5 26.Qxd5
					Qd7 27.Qh5 Nb3
1:37	1/10	1.20	26285872	21.Rh5 Qc2 22.Qxe7 Qxb2 23.Rh3
					Qf6 24.Qxf6 gxf6 25.Nd4 Rfd8 26.Nf5
					Nc4
2:37	1/11	1.41	43085388	21.Rh5 Qc2 22.Qxe7 Qxb2 23.Rh3
					Qf6 24.Qxf6 gxf6 25.Nd4 Rc5 26.Re1
					Rd8
4:58	1/12	1.07	84633761	21.Rh5 Qc2 22.Qxe7 Qxb2 23.Rd1
					g6 24.Rhd5 Nc4 25.a4 Rfe8 26.Qxa7
					Re2 27.Qb7

jm



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