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Subject: Re: How long to find White's winning move?

Author: William Sprague

Date: 00:44:24 01/03/02

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On January 02, 2002 at 19:51:17, John Merlino wrote:

>On January 02, 2002 at 18:29:56, Roy Eassa wrote:
>
>>How long does it take your program/engine to find White's winning move (and to
>>achieve a score that shows the program understands that White is winning)?
>>
>>[D] r4b1k/pp3Ppp/n1p5/2q1B3/2r5/6RP/PP2Q1P1/5R1K w - - 0 1
>


John - I found it on CM-8000 using a P4 @ 1.3 gig

Time	Depth	Score	Positions	Moves
0:00	1/3	-2.31	2167		1. Rd3 Rc2 2. Qe1 Nb4
0:00	1/3	-2.14	2753		1. Re3 Rc2 2. Qd3 Nb4
0:00	1/4	-2.07	15833		1. Re3 Rc2 2. Qd3 Nb4 3. Qb3
0:00	1/4	-1.99	32362		1. Rb3 Rc2 2. Qe4 b6 3. Rd3
0:00	1/4	-1.78	38779		1. Rg5 Rc2 2. Qd3 Rxb2 3. Bxg7+
					Bxg7 4. Rxc5 Nxc5
0:00	1/5	-1.78	63783		1. Rg5 Rc2 2. Qd3 Rxb2 3. Bxg7+
					Bxg7 4. Rxc5 Nxc5
0:01	1/5	-0.56	143809		1. Re3 Rb8 2. Bxb8 Nxb8 3. Re8 Nd7
0:01	1/6	-0.65	189549		1. Re3 Rb8 2. Bxb8 Nxb8 3. Rb3
					Rc2 4. Qe6
0:02	1/6	-0.60	333708		1. Rg5 Rc2 2. Qd1 Rf2 3. Bxg7+
					Bxg7 4. Rxc5 Rxf1+ 5. Qxf1 Nxc5
0:05	1/7	-0.37	600219		1. Rg5 Rc1 2. Bxg7+ Bxg7 3. Rxc5
					Rxf1+ 4. Qxf1 Nxc5 5. Qc4 b6
0:07	1/7	0.00	869620		1. Re3 Rb8 2. b3 Rb4 3. Bxb8 Nxb8
					4. a3 Rd4 5. Re8
0:14	1/8	0.42	1845104		1. Re3 Rb8 2. Rf5 Rc2 3. Bxg7+
					Bxg7 4. Rxc5 Rxc5 5. Re8+ Bf8 6.
					Qg4 Rc1+ 7. Kh2
0:31	1/9	0.30	4295215		1. Re3 Rc1 2. Bxg7+ Bxg7 3. Re8+
					Bf8 4. Rxa8 Rxf1+ 5. Qxf1 Kg7 6.
					Qf4 Nb4 7. Rb8 Qe7 8. a3 Nd5
1:38	1/9	2.36	13147444	1. b4 Rxb4 2. Rg5 h6 3. Qh5 Qxe5
					4. Rxe5 Rd8 5. Re8 Rbd4 6. Qe2
					Nc5 7. Rxd8 Rxd8

Bill


>It takes CM8000 over five minutes on my slow PIII-600 to see the right move for
>the win:
>
>Time	Depth	Score	Positions	Moves
>0:00	1/3	-2.31	2167		1.Rd3 Rc2 2.Qe1 Nb4
>0:00	1/3	-2.14	2753		1.Re3 Rc2 2.Qd3 Nb4
>0:00	1/4	-2.07	15833		1.Re3 Rc2 2.Qd3 Nb4 3.Qb3
>0:00	1/4	-1.99	32362		1.Rb3 Rc2 2.Qe4 b6 3.Rd3
>0:00	1/4	-1.78	38779		1.Rg5 Rc2 2.Qd3 Rxb2 3.Bxg7+ Bxg7
>					4.Rxc5 Nxc5
>0:01	2/5	-1.78	63783		1.Rg5 Rc2 2.Qd3 Rxb2 3.Bxg7+ Bxg7
>					4.Rxc5 Nxc5
>0:02	2/5	-1.54	190678		1.Re1 Rc1 2.Bxg7+ Bxg7 3.Qe8+ Qf8
>					4.Qxf8+ Rxf8 5.Rxc1 Rxf7
>0:03	2/5	-0.56	225410		1.Re3 Rb8 2.Bxb8 Nxb8 3.Re8 Nd7
>0:04	2/6	-0.65	305930		1.Re3 Rb8 2.Bxb8 Nxb8 3.Rb3 Rc2
>					4.Qe6
>0:07	2/6	-0.60	566240		1.Rg5 Rc2 2.Qd1 Rf2 3.Bxg7+ Bxg7
>					4.Rxc5 Rxf1+ 5.Qxf1 Nxc5
>0:10	3/7	-0.37	856170		1.Rg5 Rc1 2.Bxg7+ Bxg7 3.Rxc5 Rxf1+
>					4.Qxf1 Nxc5 5.Qc4 b6
>0:18	3/7	0.00	1495733		1.Re3 Rb8 2.b3 Rb4 3.Bxb8 Nxb8
>					4.a3 Rd4 5.Re8
>0:33	3/8	0.42	2693442		1.Re3 Rb8 2.Rf5 Rc2 3.Bxg7+ Bxg7
>					4.Rxc5 Rxc5 5.Re8+ Bf8 6.Qg4 Rc1+
>					7.Kh2
>1:26	4/9	0.30	7416064		1.Re3 Rc1 2.Bxg7+ Bxg7 3.Re8+ Bf8
>					4.Rxa8 Rxf1+ 5.Qxf1 Kg7 6.Qf4 Nb4
>					7.Rb8 Qe7 8.a3 Nd5
>5:43	4/9	2.36	28402457	1.b4 Rxb4 2.Rg5 h6 3.Qh5 Qxe5 4.Rxe5
>					Rd8 5.Re8 Rbd4 6.Qe2 Nc5 7.Rxd8
>					Rxd8
>
>jm



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