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Subject: Re: It is amazing how fast a P.C program finds this winning line !

Author: William Sprague

Date: 13:32:41 12/30/01

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Time	Depth	Score	Positions	Moves
0:00	1/3	-4.17	2079		1. Ne8 Kg6 2. f5+ Rxf5 3. Bxf5+
					Kxf5
0:00	1/3	-0.43	3074		1. Nf5 Rxf4 2. Ng7+ Kg6 3. gxf4
0:00	1/4	-0.43	3627		1. Nf5 Rxf4 2. Ng7+ Kg6 3. gxf4
0:00	1/5	0.92	12389		1. Nf5 Kg4 2. Ne3+ Kf3 3. Nxf1
					Rb2 4. Kf7 gxf4 5. gxf4 Kxf4 6.
					Kxf6
0:00	1/6	0.92	15931		1. Nf5 Kg4 2. Ne3+ Kf3 3. Nxf1
					Rb2 4. Kf7 gxf4 5. gxf4 Kxf4 6.
					Kxf6
0:00	1/7	0.91	35438		1. Nf5 Kg4 2. Ne3+ Kf3 3. Nxf1
					Rc2 4. Bb7+ Kf2 5. hxg5 fxg5
0:00	1/7	Mate07	116662		1. Ne8 Kg6 2. h5+ Rxh5 3. f5+ Rxf5
					4. g4 Rf4 5. Bf5+ Rxf5 6. Ng7 Rf2
					7. gxh5#
0:00	1/8	Mate07	131819		1. Ne8 Kg6 2. h5+ Rxh5 3. f5+ Rxf5
					4. g4 Rf4 5. Bf5+ Rxf5 6. Ng7 Rf2
					7. gxh5#
0:01	1/9	Mate07	168997		1. Ne8 Kg6 2. h5+ Rxh5 3. f5+ Rxf5
					4. g4 Rf4 5. Bf5+ Rxf5 6. Ng7 Rf2
					7. gxh5#
0:01	1/10	Mate07	237202		1. Ne8 Kg6 2. h5+ Rxh5 3. f5+ Rxf5
					4. g4 Rf4 5. Bf5+ Rxf5 6. Ng7 Rf2
					7. gxh5#
0:02	2/11	Mate07	414501		1. Ne8 Kg6 2. h5+ Rxh5 3. f5+ Rxf5
					4. g4 Rf4 5. Bf5+ Rxf5 6. Ng7 Rf2
					7. gxh5#
0:03	3/12	Mate07	777837		1. Ne8 Kg6 2. h5+ Rxh5 3. f5+ Rxf5
					4. g4 Rf4 5. Bf5+ Rxf5 6. Ng7 Rf2
					7. gxh5#
0:08	4/13	Mate07	1757031		1. Ne8 Kg6 2. h5+ Rxh5 3. f5+ Rxf5
					4. g4 Rf4 5. Bf5+ Rxf5 6. Ng7 Rf2
					7. gxh5#
0:18	5/14	Mate07	4192620		1. Ne8 Kg6 2. h5+ Rxh5 3. f5+ Rxf5
					4. g4 Rf4 5. Bf5+ Rxf5 6. Ng7 Rf2
					7. gxh5#

This is the time for CM 8000 on my P4 @ 1.3 gig with ss=12 and defaqult mem.
John






On December 28, 2001 at 18:11:53, John Merlino wrote:

>On December 28, 2001 at 14:32:22, Dann Corbit wrote:
>
>>On December 28, 2001 at 14:00:11, Timothy J. Frohlick wrote:
>>
>>>On December 28, 2001 at 10:40:05, Jorge Pichard wrote:
>>>
>>>>White to play and win:
>>>>
>>>>http://www.chessbase.com/puzzle/puzzle9/puzz9-4a.htm
>>>
>>>[D]2B3K1/8/3N1p1p/6pk/5P1P/6P1/7r/5r2 w - - 0 1
>>>
>>>1.Ne8 1-0 Below is the analysis by CT-14 on my old 333 PII with 96Mb RAM
>>>
>>>
>>>
>>>00:00:00.4	0.52	9	37271	Nf5 Kg4 Ne3+ Kf3 Nxf1 Rf2 Ba6 gxf4 gxf4 Kxf4 Kg7
>>>00:00:01.1	1.24	10	95642	Nf5 Kg4 Ne3+ Kf3 Nxf1 Rc2 Bb7+ Kf2 Ba6 gxf4 gxf4
>>>00:00:02.2	0.60	11	216973	Nf5 Kg4 Ne3+ Kf3 Nxf1 Rf2 hxg5 hxg5 Bb7+ Kg4 Ne3+ Kxg3
>>>fxg5 fxg5 Kg7
>>>00:00:04.2	2.14	11	365618	Ne8
>>>00:00:05.5	 Mate in 6	11	470406	Ne8 Kg6 h5+ Rxh5 f5+ Rxf5 g4 Re5 Bf5+ Rxf5 Ng7
>>>Rh2 gxf5#
>>
>>Even more astonishing is that Chest 3.19 thinks it is a mate in 7, not in 6.
>>Since a quick observation shows that CT has the right PV, we can only assume
>>that it is a matter of simple arithmetic.  Takes Chest 3 seconds to solve it.
>>
>>2B3K1/8/3N1p1p/6pk/5P1P/6P1/7r/5r2 w - - acn 293540; acs 3; bm Ne8; ce 32754; dm
>>7; pv Ne8 Kg6 h5+ Rxh5 f5+ Rxf5 g4 Re5 Bf5+ Rxf5 Ng7 Rh4 gxf5#;
>
>CM8000 says:
>
>Time	Depth	Score	Positions	Moves
>0:00	2/5	0.92	13447		1. Nf5 Kg4 2. Ne3+ Kf3 3. Nxf1
>					Rb2 4. Kf7 gxf4 5. gxf4 Kxf4 6.
>					Kxf6
>0:00	3/6	0.92	27846		1. Nf5 Kg4 2. Ne3+ Kf3 3. Nxf1
>					Rb2 4. Kf7 gxf4 5. gxf4 Kxf4 6.
>					Kxf6
>0:01	4/7	0.91	92850		1. Nf5 Kg4 2. Ne3+ Kf3 3. Nxf1
>					Rc2 4. Bb7+ Kf2 5. hxg5 fxg5
>0:03	4/7	Mate07	327864		1. Ne8 Kg6 2. h5+ Rxh5 3. f5+ Rxf5
>					4. g4 Rf4 5. Bf5+ Rxf5 6. Ng7 Rf2
>					7. gxh5#
>0:04	5/8	Mate07	426614		1. Ne8 Kg6 2. h5+ Rxh5 3. f5+ Rxf5
>					4. g4 Rf4 5. Bf5+ Rxf5 6. Ng7 Rf2
>					7. gxh5#
>0:06	6/9	Mate07	772983		1. Ne8 Kg6 2. h5+ Rxh5 3. f5+ Rxf5
>					4. g4 Rf4 5. Bf5+ Rxf5 6. Ng7 Rf2
>					7. gxh5#
>
>As far as I recall, at least some of the Tigers (and perhaps other engines) do
>not (for some strange reason) count the first move when claiming Mate in N.
>
>jm



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