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Subject: Re: fairly tough position

Author: John Merlino

Date: 21:44:50 07/20/04

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On July 20, 2004 at 23:57:41, Jon Dart wrote:

>From a test game between two Arasan versions:
>
>[D] 2R2b1r/3nkp2/B2pp1p1/1N4Pn/P3P3/4BP2/1r5q/3QK1R1 w - -
>
>In the actual game, White played Qd3 and lost.
>
>White must play Nd4 or Na7 here, after which Crafty expects a
>draw by repetition. Crafty analysis (not the latest version):

CM9_SKR on an AMD 2500 needs 1:16 to find Na7:

Time	Depth	Score	Positions	Moves
0:00	1/3	-Mate05	2366		1.f4 Qh4+ 2.Rg3 Qxg3+ 3.Kf1 Qg2+
					4.Ke1 Qh1+ 5.Bg1 Qxg1#
0:00	1/3	0.00	3389		1.Rc6 Qh4+ 2.Kf1 Qh3+ 3.Ke1 Qh4+
0:00	1/4	0.00	12239		1.Rc6 Qh4+ 2.Kf1 Qh3+ 3.Ke1 Qh4+
0:00	1/4	0.55	30044		1.Rg4 Bg7 2.Bg1 Qe5
0:00	1/5	0.64	43772		1.Rg4 f5 2.Bg1 Qe5 3.Nd4
0:00	1/6	0.57	122209		1.Rg4 Bg7 2.Bg1 Qe5 3.Rc2 Rb4
0:01	1/7	0.43	341274		1.Rg4 Bg7 2.Bg1 Qe5 3.Qc1 Rxc8
					4.Qxc8
0:05	1/8	0.64	1226006		1.Rg4 Bg7 2.Bg1 Qe5 3.Bd4 Qh2 4.Na7
					Ne5 5.Bxb2 Qxb2
0:22	1/9	-0.65	5158532		1.Rg4 f5 2.Bg1 Qe5 3.Bd4 Ng3 4.Bxb2
					Rh1+ 5.Kf2 Nxe4+ 6.fxe4 Qxb2+ 7.Qe2
					Qxe2+ 8.Kxe2 fxg4
1:16	1/9	0.00	16333565	1.Na7 f5 2.exf5 Qh4+ 3.Kf1 Ne5
					4.Rc7+ Kd8 5.Rc8+ Ke7
4:14	2/10	0.00	52254044	1.Na7 f5 2.Qc1 Bg7 3.Nc6+ Kf7 4.Rc7
					Ke8 5.exf5 Qh4+ 6.Kf1 Qh3+ 7.Ke1
					Qh4+

jm



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