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Subject: Re: Test: quiet move and Zugzwang

Author: John Merlino

Date: 12:54:57 07/28/04

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On July 28, 2004 at 15:31:23, John Merlino wrote:

>On July 28, 2004 at 14:46:05, Kurt Utzinger wrote:
>
>>Wcrafty 19.15 (console mode P4 1.8) finds the solution
>>almost instantly.
>>Kurt
>>
>>[D]1knB4/8/7p/5R2/7K/8/3r4/7B w - - 0 1
>
>Is the solution to find 1.Rb5+ or to find the proper continuation (3.Kg4, for
>example)?

FYI, CM9_SKR on an AMD 2500 finds Rb5+ in less than one second:

Time	Depth	Score	Positions	Moves
0:00	1/3	0.58	1199		1.Rb5+ Nb6 2.Rxb6+ Kc8 3.Be4 Rxd8
					4.Rxh6
0:00	1/3	2.15	1376		1.Bd5 Nd6 2.Re5 Rf2
0:00	1/4	2.21	2747		1.Bd5 Nd6 2.Re5 Nc4
0:00	1/5	0.60	7343		1.Bd5 Nd6 2.Rh5 Rh2+ 3.Kg4 Rxh5
					4.Kxh5
0:00	1/6	0.60	20372		1.Bd5 Nd6 2.Rh5 Rh2+ 3.Kg4 Rxh5
					4.Kxh5 Nf5 5.Kg4
0:00	1/7	0.57	56760		1.Bd5 Nd6 2.Rh5 Ne4 3.Bxe4 Rxd8
					4.Rxh6 Kc7
0:00	1/8	0.40	131757		1.Bd5 Nd6 2.Re5 Nc4 3.Bxc4 Rxd8
					4.Kh5 Rd4
0:00	1/8	0.57	218570		1.Rb5+ Nb6 2.Rxb6+ Kc8 3.Bg5 Rh2+
					4.Kg3 Rxh1 5.Bxh6 Kc7 6.Be3 Re1
0:01	1/9	0.57	467441		1.Rb5+ Nb6 2.Rxb6+ Kc8 3.Bg5 hxg5+
					4.Kxg5 Kc7 5.Rc6+ Kd7 6.Be4 Rd4
					7.Bf3
0:02	2/10	0.58	922112		1.Rb5+ Nb6 2.Rxb6+ Kc8 3.Kg3 Kxd8
					4.Rxh6 Rd4 5.Bf3 Ke7 6.Rc6 Kd8
0:05	3/11	0.58	1942346		1.Rb5+ Nb6 2.Rxb6+ Kc8 3.Kg3 Kxd8
					4.Rxh6 Rd4 5.Kf2 Ke7 6.Ke3 Rd1
					7.Rh7+ Kd6 8.Be4
0:12	4/12	0.59	4557802		1.Rb5+ Nb6 2.Kg3 Rxd8 3.Rxb6+ Kc7
					4.Rc6+ Kd7 5.Rxh6 Kc7 6.Rc6+ Kd7
					7.Bd5 Re8 8.Kf4 Re2
0:29	5/13	0.59	11225567	1.Rb5+ Nb6 2.Rxb6+ Kc8 3.Kg3 Kxd8
					4.Rxh6 Rd4 5.Kf2 Ke7 6.Ke3 Rd6
					7.Rh7+ Ke6 8.Be4 Rd1
1:09	6/14	0.59	28697028	1.Rb5+ Nb6 2.Rxb6+ Kc8 3.Kg3 Kxd8
					4.Rxh6 Rd4 5.Kf2 Ke7 6.Ke3 Rd6
					7.Rh7+ Ke6 8.Bf3 Ke5 9.Rh5+ Kf6

jm



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