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Subject: Re: TestPosition

Author: John Merlino

Date: 13:36:07 11/13/01

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On November 13, 2001 at 12:00:47, Michel Langeveld wrote:

>How long does your program need to see that Nxf1 is deadly lost:
>
>[D] 2r3k1/1b3p2/p4q2/2bp1NpQ/Pr6/3BP2P/3n1PPB/1R3RK1 b - - 0 30

Pretty amusing....

Chessmaster 8000 sees that Nxf1 is very bad in 10 seconds (PIII-733).
After 0:16 it sees that Rxb1 is also pretty bad.
After 0:21 it sees that Kf8 is not quite so bad, but not looking good.
After 0:37 it sees that Rc8 is slightly better, but still not good.
After 1:05 it sees that Rc8 is actually worse than expected.
After 1:23 it sees that Kf8 is better than Rc8, but still likely to lose....

Time	Depth	Score	Positions	Moves
0:00	1/3	-0.99	1383		30...Nxf1 31.Kxf1 Rxb1+ 32.Bxb1 Kf8
0:00	1/4	-0.80	5353		30...Nxf1 31.Kxf1 Rxb1+ 32.Bxb1 Bc6
0:00	2/5	-1.11	34351		30...Nxf1 31.Be5 Rxb1 32.Bxb1 Ng3
					33.Bxg3 Kf8
0:01	2/6	-0.76	84149		30...Nxf1 31.Rxf1 Kf8 32.f4 gxf4
					33.Bxf4 Rxa4
0:04	3/7	-0.64	289268		30...Nxf1 31.Rxf1 Kf8 32.f4 gxf4
					33.Bxf4 Rxa4 34.Qg4
0:10	3/8	3.05	761876		30...Nxf1 31.Be5 Ng3 32.fxg3 Bxe3+
					33.Kh2 Rh4 34.Nxh4 Qxe5 35.Rxb7
0:16	3/8	2.44	1227394		30...Rxb1 31.Rxb1 Bf8 32.Nd6 Bxd6
					33.Qh7+ Kf8 34.Bxd6+ Qxd6 35.Qh8+
					Ke7 36.Rxb7+ Rc7 37.Qc8 Rxb7 38.Qxb7+
					Kf8 39.Qc8+ Ke7 40.Bxa6
0:21	3/8	1.19	1555937		30...Kf8 31.Rxb4 Bxb4 32.Rd1 Ne4
					33.Bxe4 dxe4 34.Bd6+ Bxd6 35.Nxd6
					Rc7 36.Qh7
0:37	3/8	0.97	2729825		30...Rc6 31.Rxb4 Bxb4 32.Rd1 Ne4
					33.Qf3 Rc8 34.Nd4 Qxf3 35.gxf3
1:05	4/9	1.45	4851798		30...Rc6 31.Rxb4 Bxb4 32.Rd1 Bc3
					33.f4 gxf4 34.Bxf4 Kf8 35.e4 Bd4+
					36.Kh2 dxe4 37.Bxe4
1:23	4/9	1.02	6198876		30...Kf8 31.Rxb4 Bxb4 32.Qg4 a5
					33.Rd1 Nc4 34.Qd4 Bc3 35.Qxf6 Bxf6
2:24	4/10	1.11	10952042	30...Kf8 31.Rxb4 Bxb4 32.Qg4 a5
					33.Rd1 Nc4 34.Qd4 Bc3 35.Qxf6 Bxf6
					36.Nd4
7:32	5/11	0.95	35608518	30...Kf8 31.Rxb4 Bxb4 32.Rd1 Nc4
					33.f4 g4 34.hxg4 Bc5 35.g5 Qb2
					36.Qf3

jm



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