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Subject: Re: Test position

Author: John Merlino

Date: 11:16:33 07/19/04

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On July 19, 2004 at 08:57:39, Tom Brake wrote:

>[D]r1b2R1R/pp1k4/8/P3p3/2n5/6P1/4KP2/8 w - - 0 31
>
>31. g4 wins.
>
>CM9K (Athlon 1200) took its sweet time finding and needs a little longer to give
>it a correct score
>
>Time	Depth	Score	Positions	Moves
>0:00	1/4	0.17	7009		31.a6 Kc7 32.f3 b5 33.Rf7+ Kb6
>0:00	1/4	0.22	7866		31.Re8 Kc7 32.f3 b5 33.axb6ep+ axb6
>0:00	1/5	-0.08	14807		31.Re8 Kc7 32.f3 Nxa5 33.Rxe5 Nc6
>0:00	1/5	0.17	20954		31.a6 b5 32.f3 Kc7 33.Rf7+ Kb6
>0:00	1/6	0.04	54261		31.a6 b6 32.f3 Nd6 33.Rh7+ Kc6
>					34.Kf2 Kd5
>0:00	1/7	0.13	119223		31.a6 b6 32.f3 Nd6 33.Rh7+ Kc6
>					34.Kf2 Kd5 35.g4
>0:02	1/8	-0.05	376204		31.a6 b5 32.g4 b4 33.g5 Nd6 34.Rh7+
>					Kc6 35.Ke3 Kd5
>0:08	2/9	-0.20	1174317		31.a6 bxa6 32.g4 Nd6 33.g5 Ke7
>					34.Ke3 Rb8 35.f4 Rb3+ 36.Ke2
>0:25	3/10	-0.24	3531337		31.a6 b5 32.f3 b4 33.Rf6 Kc7 34.Rh7+
>					Bd7 35.Rh4 Nd6 36.Rxb4 Bb5+ 37.Kf2
>					Bxa6
>0:53	4/11	-0.24	7744943		31.a6 b5 32.f3 b4 33.Rf6 Kc7 34.Rh7+
>					Bd7 35.Rh4 Nd6 36.Rxb4 Bb5+ 37.Kf2
>					Bxa6
>1:25	4/11	0.16	12770215	31.g4 Nxa5 32.g5 Kc7 33.Ke1 Nc6
>					34.g6 Rb8 35.g7 Be6 36.Rxb8 Nxb8
>					37.g8=Q Bxg8 38.Rxg8
>2:03	5/12	1.12	19000934	31.g4 Nxa5 32.g5 Nc6 33.g6 Nd4+
>					34.Ke3 Ne6 35.Rf7+ Kd6 36.Rf6 Kc5
>					37.Rxe6 Bxe6 38.Rxa8

Interesting. Here is one position in which the SKR personality, even on much
faster hardware, does much worse than the default (the above IS with the default
personality, right?)

SKR on an AMD 2500 says:

Time	Depth	Score	Positions	Moves
0:00	1/3	-0.66	1412		31.Rh7+ Kc6 32.Rh6+ Kb5 33.Rhh8
0:00	1/3	-0.54	2198		31.Rd8+ Kc7 32.Rde8 Bg4+ 33.f3
					Rxe8 34.Rxe8
0:00	1/3	-0.48	2384		31.Rf5 Kc6 32.Rff8
0:00	1/3	-0.21	2694		31.Re8 b5 32.axb6ep axb6
0:00	1/4	-0.21	3887		31.Re8 b5 32.axb6ep axb6
0:00	1/4	-0.01	4599		31.a6 bxa6 32.Rf7+ Kc6 33.f3
0:00	2/5	-0.34	10191		31.a6 bxa6 32.f3 Kc7 33.Rh7+ Kb6
0:00	2/5	-0.16	11386		31.Re8 Nxa5 32.Rxe5 Nc6 33.Rg5
0:00	2/6	-0.38	29936		31.Re8 Kc7 32.f3 Nxa5 33.Rxe5 Nc6
0:00	2/6	-0.21	34437		31.a6 bxa6 32.f3 Rb8 33.Rh7+ Kc6
					34.Rxa7
0:00	2/7	-0.20	110730		31.a6 b6 32.f3 Nd6 33.Rh7+ Kc6
					34.Kf2 Kd5
0:01	3/8	-0.34	285991		31.a6 bxa6 32.f3 Nd6 33.Rh7+ Kc6
					34.g4 Bb7 35.Rxa8 Bxa8 36.Rxa7
0:02	3/9	-0.40	653473		31.a6 bxa6 32.f3 Nd6 33.g4 Rb8
					34.Rh7+ Kc6 35.Rxa7 Rb2+ 36.Kd3
0:08	3/10	-0.71	2331782		31.a6 bxa6 32.g4 Nd6 33.g5 Ke7
					34.Ke3 Rb8 35.f4 Rb3+ 36.Ke2
0:13	3/10	-0.41	3629058		31.Ke1 b5 32.a6 b4 33.Rh4 Na3 34.Rh7+
					Kc6 35.f3 Kb6 36.Rf6+ Kc5
0:23	3/10	-0.35	6434098		31.f3 b5 32.a6 Nd6 33.g4 Kc6 34.Ke3
					Rb8 35.Rh7 Nc4+ 36.Kd3
0:29	4/11	-0.39	8174889		31.f3 b5 32.Rh6 Kc7 33.Re8 b4 34.Re7+
					Bd7 35.Rhh7 Rd8 36.Rh4 Nxa5 37.Rxb4
0:54	5/12	-0.43	15983987	31.f3 b5 32.Rh6 Ke7 33.Rfh8 Nd6
					34.R8h7+ Nf7 35.Rc6 Be6 36.Rc7+
					Kf6 37.a6 b4
1:06	5/12	-0.40	19380769	31.Ke1 b5 32.a6 e4 33.Rd8+ Kc7
					34.Rd5 Kc6 35.Rdd8 Nb6 36.Rde8
					Kd6 37.Rh7 Bxa6 38.Rxe4
1:52	5/12	-0.04	34122383	31.g4 Nxa5 32.g5 Kc7 33.Ke1 Nc6
					34.g6 Rb8 35.g7 Be6 36.Rxb8 Nxb8
					37.Re8 Bd5 38.Rxe5
2:39	6/13	0.72	49806187	31.g4 Kc7 32.Ke1 e4 33.g5 Ne5 34.Rh7+
					Kc6 35.g6 Nf3+ 36.Ke2 Ng5 37.Ke3
					Kd6 38.Rd8+ Ke6

jm



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