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Subject: Re: You do not use Fruit2.2.1 with default setting(no egtb) or

Author: enrico carrisco

Date: 00:03:12 11/21/05

Go up one level in this thread


On November 21, 2005 at 02:54:42, Uri Blass wrote:

>On November 21, 2005 at 00:57:13, enrico carrisco wrote:
>
>>On November 21, 2005 at 00:07:38, A. Steen wrote:
>>
>>>On November 20, 2005 at 23:23:14, enrico carrisco wrote:
>>>
>>>>On November 20, 2005 at 23:03:44, A. Steen wrote:
>>>>
>>>>>On November 20, 2005 at 22:42:02, enrico carrisco wrote:
>>>
>>>
>>>  ::: snipped ten examples of engines analysing a KRK position; all found the
>>>best move (Ke3) immediately in a tiny fraction of a second and gave it a high
>>>evaluation :::
>>>
>>>
>>>>>>Please -- will the die-hard "EGTB files are a waste" believers please stand-up.
>>>>>>
>>>>>>Regards,
>>>>>>
>>>>>>Enrico.
>>>>>
>>>>>
>>>>>I think EGTBs are useful, but I think your examples illustrate the opposite of
>>>>>what you are trying to prove. :)
>>>>>
>>>>
>>>>Or perhaps you miss my point and need a clearer path of explanation.
>>>
>>>We'll see what I missed. :)
>>
>>Or what I missed...  And why it is clear to me that I should have put forth a
>>more solid (and clear) foundation to begin with.  Then, the obvious point that
>>the position is "won" would not arise.
>>
>>http://www.talkchess.com/forums/1/message.html?463265
>>
>>>
>>>>>Good chess engines are not optimised mate-finders, but optimised win-finders,
>>>>>and there is a big difference!
>>>>
>>>>So, after viewing the example below, your definition of win-finder would be
>>>>taking the scenic route?  Your statement is nonsense as finding mate is >winning.
>>>
>>>My statement is not "nonsense". :)
>>>
>>>You are confusing at least four potentially distinct things:
>>>*a) winning by the fastest method available, and knowing it is fastest and a
>>>100% sure win (i.e. a seen mate)
>>>*b) winning by the fastest method available but not knowing it is fastest or a
>>>100% sure win
>>>*c) winning by a more "scenic route" and knowing it is a 100% sure win (a seen
>>>mate)
>>>*d) winning by a more "scenic route" and not knowing it is a 100% sure win.
>>>
>>>A tablebase result would be of type (a).
>>>
>>>All your chosen engine analysis examples were of type (b), with the move found
>>>(and potentially made, if the TC was demanding enough) as fast as a tablebase
>>>lookup would be.  Whether directly (root position) or while carrying out an
>>>evaluation/search.
>>>
>>>So in the single position example given by you, the EGTBs have no advantage.
>>>
>>>Had you chosen examples of types (c) or (d), you may likely have had a point.
>>>
>>>But you did not.
>>>
>>>Whether the program knows or not it is a fastest win is usually irrelevant as
>>>long as it makes the perfect move fast enough. As Rhett Butler put it: "Frankly
>>>my dear, I don't give a damn." In a manner of speaking.
>>
>>So, in your words, it is unimportant if 21 extra moves are made as long as they
>>are made "fast enough."  Unfortunately, I think many would "give a damn",
>>especially if trying to analyze a position for greater insight.  (Especially a
>>self-proclaimed "almost patzer.")  Or is it genius?  (See:
>>http://www.talkchess.com/forums/1/message.html?463281)
>>
>>Here's another example -- perhaps you will find it a worthy one:
>>
>>With EGTBs it finds an instant mate in 14 (Rg6.)  Without, however:
>>
>>[D]8/1k6/8/8/8/8/6R1/7K w - - 0 1
>>
>>Analysis by Fruit 2.2.1:
>>
>>1.Kg1
>>  +-  (5.00)   Depth: 1/1   00:00:00
>>1.Kg1 Kc6
>>  +-  (5.03)   Depth: 2/4   00:00:00
>>1.Kg1 Kc6 2.Kf1
>>  +-  (4.95)   Depth: 3/6   00:00:00
>>1.Rb2+ Kc6 2.Kg2 Kd5 3.Rb5+ Kd4
>>  +-  (5.09)   Depth: 3/8   00:00:00
>>1.Rb2+ Kc6 2.Kg2 Kd5 3.Rb5+ Kd4
>>  +-  (5.09)   Depth: 4/9   00:00:00
>>1.Kg1 Kc6 2.Kf2 Kd6 3.Rg6+ Kd5
>>  +-  (5.18)   Depth: 4/9   00:00:00
>>1.Rg6 Kc7 2.Kg2 Kd7
>>  +-  (5.21)   Depth: 4/9   00:00:00
>>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3
>>  +-  (5.25)   Depth: 5/9   00:00:00
>>1.Rb2+ Kc6 2.Kg2 Kd6 3.Kf3 Ke5 4.Re2+ Kd5
>>  +-  (5.28)   Depth: 5/10   00:00:00
>>1.Rb2+ Kc6 2.Kg2 Kd6 3.Kf3 Ke5 4.Re2+ Kd5
>>  +-  (5.28)   Depth: 6/12   00:00:00  21kN
>>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3 Ke7
>>  +-  (5.47)   Depth: 6/12   00:00:00  22kN
>>1.Rg6 Kc7 2.Kh2 Kb7 3.Kg3 Kc8 4.Rg7
>>  +-  (5.73)   Depth: 7/12   00:00:00  52kN
>>1.Rg6 Kc7 2.Kh2 Kb7 3.Kg3 Kc8 4.Rg7 Kd8
>>  +-  (5.86)   Depth: 8/14   00:00:01  156kN
>>1.Rg6 Kc7 2.Kh2 Kb7 3.Kg3 Kc8 4.Rg7 Kd8 5.Kf4
>>  +-  (5.95)   Depth: 9/16   00:00:01  472kN
>>1.Rg6 Kc8 2.Rg7 Kd8 3.Kg2 Ke8 4.Kf2 Kd8 5.Ke3 Ke8
>>  +-  (6.16)   Depth: 10/18   00:00:01  1323kN
>>1.Rg6 Kc8 2.Rg7 Kd8 3.Kg2 Ke8 4.Rb7 Kf8 5.Kg3 Kg8 6.Kf4
>>  +-  (6.14)   Depth: 11/18   00:00:01  1560kN
>>1.Rg6 Kc7 2.Kh2 Kb7 3.Rh6 Ka7 4.Kg2 Kb8 5.Kf3 Kc8 6.Rh7 Kd8
>>  +-  (6.06)   Depth: 12/20   00:00:04  9878kN
>>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3 Ke7 4.Ke4 Kf7 5.Rd6 Kg7 6.Kf5 Kf7 7.Rd7+ Ke8
>>  +-  (6.16)   Depth: 13/22   00:00:14  34907kN
>>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3 Ke7 4.Ra6 Kd7 5.Ke4 Kc7 6.Kd3 Kd8 7.Ra7 Ke8
>>  +-  (6.16)   Depth: 14/24   00:00:23  55353kN
>>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3 Ke7 4.Kf4 Kf7 5.Rc6 Ke7 6.Ke5 Kd7 7.Rc4 Ke7 8.Rc7+ Kd8
>>  +-  (6.25)   Depth: 15/24   00:00:46  109994kN
>>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3 Ke7 4.Kf4 Kf7 5.Rd6 Kg7 6.Rb6 Kh7 7.Ra6 Kg8 8.Ra7 Kf8
>>  +-  (6.26)   Depth: 16/26   00:01:54  270223kN
>>1.Kg1 Ka6 2.Kf2 Ka5 3.Rg5+ Kb6 4.Ke3 Kc7 5.Rb5 Kd8 6.Rd5+ Ke8 7.Kf4 Kf8 8.Re5
>>Kg8 9.Re7 Kf8
>>  +-  (6.27)   Depth: 16/26   00:02:41  389657kN
>>1.Rg4 Kb6 2.Kg2 Kc6 3.Kf3 Kd7 4.Rd4+ Ke6 5.Kf4 Ke7 6.Kf5 Kf7 7.Rd7+ Ke8 8.Ke6
>>Kf8 9.Rh7 Kg8
>>  +-  (6.32)   Depth: 16/26   00:03:11  463143kN
>>1.Rg4 Kb6 2.Kg2 Kc6 3.Kf3 Kd7 4.Rc4 Ke6 5.Kf4 Kd7 6.Ke5 Ke7 7.Rc7+ Kd8 8.Rg7 Kc8
>>9.Kd6 Kb8
>>  +-  (6.32)   Depth: 17/28   00:03:49  552376kN
>>1.Rb2+ Kc6 2.Kg2 Kd6 3.Kf3 Kd7 4.Kf4 Kd6 5.Rd2+ Ke6 6.Rd3 Ke7 7.Ke5 Kf7 8.Rf3+
>>Kg6 9.Rf6+ Kg7 10.Ke6 Kh8 11.Rf7
>>  +-  (6.34)   Depth: 17/28   00:06:11  900639kN
>>1.Rb2+ Kc6 2.Kg2 Kd6 3.Kf3 Kd7 4.Ke4 Kc6 5.Ke5 Kd7 6.Rc2 Ke7 7.Rc7+ Kd8 8.Rg7
>>Kc8 9.Kd6 Kb8 10.Rc7 Ka8
>>  +-  (6.55)   Depth: 18/29   00:09:05  1339108kN
>>
>>-elc.
>
>Fruit learned from analysis of other lines not to find the mate and you do not
>start with clear hash.
>
>I have no idea what you changed but fruit with no tablebases and 512 mbytes hash
>does not need so many nodes to get depth 18
>

Apparently clear hash, or switching engines does not clear hash for Fruit?

-elc.

>
>New game,
>8/1k6/8/8/8/8/6R1/7K w - - 0 1
>
>Analysis by Fruit 2.2.1:
>
>1.Kg1
>  +-  (5.00)   Depth: 1/1   00:00:00
>1.Kg1 Kc6
>  +-  (5.03)   Depth: 2/4   00:00:00
>1.Kg1 Kc6 2.Kf1
>  +-  (4.95)   Depth: 3/6   00:00:00
>1.Rb2+ Kc6 2.Kg2 Kd5 3.Rb5+ Kd4
>  +-  (5.09)   Depth: 3/6   00:00:00
>1.Rb2+ Kc6 2.Kg2 Kd5 3.Rb5+ Kd4
>  +-  (5.09)   Depth: 4/9   00:00:00
>1.Kg1 Kc6 2.Kf2 Kd6 3.Rg6+ Kd5
>  +-  (5.18)   Depth: 4/9   00:00:00
>1.Rc2 Kb6 2.Kg2 Kb5
>  +-  (5.20)   Depth: 4/9   00:00:00
>1.Rg6 Kc7 2.Kg2 Kd7
>  +-  (5.21)   Depth: 4/9   00:00:00
>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3
>  +-  (5.25)   Depth: 5/9   00:00:00
>1.Rb2+ Kc6 2.Kg2 Kd5 3.Kf3 Kd4
>  +-  (5.28)   Depth: 5/10   00:00:00
>1.Rb2+ Kc6 2.Kg2 Kd5 3.Kf3 Kd4 4.Rd2+ Ke5
>  +-  (5.28)   Depth: 6/12   00:00:00  12kN
>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3 Ke7
>  +-  (5.47)   Depth: 6/12   00:00:00  13kN
>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3 Ke7 4.Ke4
>  +-  (5.45)   Depth: 7/12   00:00:00  23kN
>1.Rb2+ Kc6 2.Kg2 Kd5 3.Kf3 Kd4 4.Kf4 Kd5 5.Rd2+ Kc5
>  +-  (5.47)   Depth: 7/12   00:00:01  31kN
>1.Rb2+ Kc6 2.Kg2 Kd5 3.Kf3 Kd4 4.Rd2+ Ke5 5.Ke3 Ke6
>  +-  (5.47)   Depth: 8/14   00:00:01  56kN
>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3 Ke7 4.Ke4 Kd7
>  +-  (5.66)   Depth: 8/14   00:00:01  60kN
>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3 Ke7 4.Ke4 Kf7 5.Rd6
>  +-  (5.55)   Depth: 9/14   00:00:01  106kN
>1.Rc2 Kb6 2.Kg2 Kb5 3.Kf3 Kb4 4.Ke4 Kb5 5.Rb2+ Kc5
>  +-  (5.56)   Depth: 9/16   00:00:01  132kN
>1.Rd2 Kc6 2.Kg2 Kc5 3.Kf3 Kc6 4.Ke4 Kc7 5.Rc2+ Kd6
>  +-  (5.57)   Depth: 9/16   00:00:01  169kN
>1.Rd2 Kc6 2.Kg2 Kc5 3.Kf3 Kb5 4.Ke4 Kb4 5.Kd4 Kb3
>  +-  (5.60)   Depth: 10/16   00:00:01  193kN
>1.Rc2 Kb6 2.Kg2 Kb5 3.Kf3 Kb4 4.Ke4 Kb3 5.Rc1 Kb4
>  +-  (5.67)   Depth: 10/16   00:00:01  197kN
>1.Rc2 Kb6 2.Kg2 Kb5 3.Kf3 Kb4 4.Ke4 Kb3 5.Rg2 Kb4 6.Rb2+ Kc5 7.Rc2+ Kd6
>  +-  (5.57)   Depth: 11/18   00:00:01  501kN
>1.Rd2 Kc6 2.Kg2 Kc5 3.Kf3 Kb5 4.Ke4 Kb4 5.Rd4+ Kc5 6.Rd8 Kb5
>  +-  (5.66)   Depth: 11/18   00:00:01  572kN
>1.Rd2 Kc6 2.Kg2 Kc5 3.Kf3 Kb5 4.Ke4 Kc6 5.Rd5 Kb6 6.Rf5 Kc6
>  +-  (5.67)   Depth: 12/18   00:00:02  940kN
>1.Rc2 Kb6 2.Kg2 Kb5 3.Kf3 Kb4 4.Rc1 Kb5 5.Ke4 Kb4 6.Kd5 Kb3
>  +-  (5.78)   Depth: 12/18   00:00:02  964kN
>1.Rc2 Kb6 2.Kg2 Kb5 3.Kf3 Kb4 4.Ke4 Kb3 5.Rc7 Kb4 6.Kd5 Kb3 7.Rb7+ Kc3
>  +-  (5.68)   Depth: 13/21   00:00:02  1739kN
>1.Rc2 Kb6 2.Kg2 Kb5 3.Kf3 Kb4 4.Ke4 Kb5 5.Kd4 Kb6 6.Rc1 Kb5 7.Rc7 Kb6
>  +-  (5.76)   Depth: 14/22   00:00:02  2896kN
>1.Rc2 Kb6 2.Kg2 Kb5 3.Kf3 Kb4 4.Ke4 Kb5 5.Kd5 Kb4 6.Rc4+ Kb5 7.Rg4 Kb6 8.Rg7 Kb5
>9.Rb7+ Ka5
>  +-  (5.88)   Depth: 15/22   00:00:03  3071kN
>1.Rc2 Kb6 2.Kg2 Kb5 3.Kf3 Kb4 4.Ke4 Kb5 5.Kd5 Kb4 6.Rc4+ Kb5 7.Rg4 Kb6 8.Rb4+
>Kc7 9.Rb3 Kd8
>  +-  (5.87)   Depth: 16/26   00:00:11  20462kN
>1.Rc2 Kb6 2.Kg2 Kb5 3.Kf3 Kb4 4.Ke4 Kb5 5.Kd4 Kb6 6.Kd5 Ka5 7.Kc5 Ka6 8.Rg2 Kb7
>9.Rg7+ Ka6
>  +-  (5.89)   Depth: 17/28   00:00:20  38575kN
>1.Rc2 Kb6 2.Kg2 Kb5 3.Kf3 Kb4 4.Ke4 Kb5 5.Kd5 Kb4 6.Rc4+ Kb3 7.Kd4 Kb2 8.Rc3 Ka2
>9.Rc2+ Kb3 10.Rc6 Kb4 11.Rb6+ Ka4
>  +-  (5.89)   Depth: 18/28   00:00:21  40717kN
>1.Rc2 Kb6 2.Kg2 Kb5 3.Kf3 Kb4 4.Ke4 Kb3 5.Rc6 Ka4 6.Kd4 Kb4 7.Rb6+ Ka5 8.Rb1 Ka4
>9.Kc5 Ka3 10.Kc4 Ka2
>  +-  (6.04)   Depth: 19/28   00:00:22  41227kN
>1.Rc2 Kb6 2.Kg2 Kb5 3.Kf3 Kb4 4.Ke4 Kb3 5.Rc6 Ka4 6.Kd4 Kb3 7.Rc4 Kb2 8.Rc3 Ka2
>9.Kc4 Ka1 10.Rb3 Ka2
>  +-  (6.04)   Depth: 20/28   00:00:23  44880kN
>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3 Ke7 4.Ke4 Kf7 5.Rb6 Ke7 6.Kd5 Kf7 7.Ke5 Kg7 8.Kf5 Kf7
>9.Rb7+ Ke8 10.Ke6 Kd8 11.Rd7+ Ke8
>  +-  (6.14)   Depth: 20/28   00:00:24  45162kN
>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3 Ke7 4.Ke4 Kf7 5.Rd6 Ke7 6.Ke5 Kf7 7.Kf5 Ke7 8.Rd1 Kf7
>9.Rd7+ Ke8 10.Ke6 Kf8 11.Rb7 Kg8
>  +-  (6.32)   Depth: 21/28   00:00:24  45978kN
>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3 Ke7 4.Ke4 Kf7 5.Rd6 Ke7 6.Ke5 Kf7 7.Rc6 Kg7 8.Rf6 Kh7
>9.Kf5 Kg7 10.Ke6 Kh8 11.Rf7 Kg8
>  +-  (6.32)   Depth: 22/31   00:00:47  85131kN
>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3 Ke7 4.Ke4 Kf7 5.Rd6 Ke7 6.Ke5 Kf7 7.Kf5 Ke7 8.Rd1 Kf7
>9.Rd7+ Ke8 10.Ke6 Kf8 11.Kf6 Kg8 12.Rd8+ Kh7 13.Rb8 Kh6 14.Rh8#
>  +-  (#14)   Depth: 23/32   00:00:48  86193kN
>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3 Ke7 4.Ke4 Kf7 5.Rd6 Ke7 6.Ke5 Kf7 7.Kf5 Ke7 8.Rd1 Kf7
>9.Rd7+ Ke8 10.Ke6 Kf8 11.Kf6 Kg8 12.Rd8+ Kh7 13.Rb8 Kh6 14.Rh8#
>  +-  (#14)   Depth: 24/32   00:00:48  86894kN
>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3 Ke7 4.Ke4 Kf7 5.Rd6 Ke7 6.Ke5 Kf7 7.Kf5 Ke7 8.Rd1 Kf7
>9.Rd7+ Ke8 10.Ke6 Kf8 11.Rc7 Kg8 12.Kf6 Kh8 13.Kg6 Kg8 14.Rc8#
>  +-  (#14)   Depth: 25/32   00:00:49  87815kN
>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3 Ke7 4.Ke4 Kf7 5.Rd6 Ke7 6.Ke5 Kf7 7.Kf5 Ke7 8.Rd1 Kf7
>9.Rd7+ Ke8 10.Ke6 Kf8 11.Rc7 Kg8 12.Kf6 Kh8 13.Kg6 Kg8 14.Rc8#
>  +-  (#14)   Depth: 26/32   00:00:50  89002kN
>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3 Ke7 4.Ke4 Kf7 5.Rd6 Ke7 6.Ke5 Kf7 7.Kf5 Ke7 8.Rd1 Kf7
>9.Rd7+ Ke8 10.Ke6 Kf8 11.Rc7 Kg8 12.Kf6 Kh8 13.Kg6 Kg8 14.Rc8#
>  +-  (#14)   Depth: 27/32   00:00:50  90543kN
>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3 Ke7 4.Ke4 Kf7 5.Rd6 Ke7 6.Ke5 Kf7 7.Kf5 Ke7 8.Rd1 Kf7
>9.Rd7+ Ke8 10.Ke6 Kf8 11.Rc7 Kg8 12.Kf6 Kh8 13.Kg6 Kg8 14.Rc8#
>  +-  (#14)   Depth: 28/32   00:00:51  92519kN
>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3 Ke7 4.Ke4 Kf7 5.Rd6 Ke7 6.Ke5 Kf7 7.Kf5 Ke7 8.Rd1 Kf7
>9.Rd7+ Ke8 10.Ke6 Kf8 11.Rc7 Kg8 12.Kf6 Kh8 13.Kg6 Kg8 14.Rc8#
>  +-  (#14)   Depth: 29/32   00:00:52  94579kN
>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3 Ke7 4.Ke4 Kf7 5.Rd6 Ke7 6.Ke5 Kf7 7.Kf5 Ke7 8.Rd1 Kf7
>9.Rd7+ Ke8 10.Ke6 Kf8 11.Rc7 Kg8 12.Kf6 Kh8 13.Kg6 Kg8 14.Rc8#
>  +-  (#14)   Depth: 30/32   00:00:53  97117kN
>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3 Ke7 4.Ke4 Kf7 5.Rd6 Ke7 6.Ke5 Kf7 7.Kf5 Ke7 8.Rd1 Kf7
>9.Rd7+ Ke8 10.Ke6 Kf8 11.Rc7 Kg8 12.Kf6 Kh8 13.Kg6 Kg8 14.Rc8#
>  +-  (#14)   Depth: 31/32   00:00:54  100063kN
>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3 Ke7 4.Ke4 Kf7 5.Rd6 Ke7 6.Ke5 Kf7 7.Kf5 Ke7 8.Rd1 Kf7
>9.Rd7+ Ke8 10.Ke6 Kf8 11.Rc7 Kg8 12.Kf6 Kh8 13.Kg6 Kg8 14.Rc8#
>  +-  (#14)   Depth: 32/32   00:00:55  103457kN
>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3 Ke7 4.Ke4 Kf7 5.Rd6 Ke7 6.Ke5 Kf7 7.Kf5 Ke7 8.Rd1 Kf7
>9.Rd7+ Ke8 10.Ke6 Kf8 11.Rc7 Kg8 12.Kf6 Kh8 13.Kg6 Kg8 14.Rc8#
>  +-  (#14)   Depth: 33/32   00:00:56  106950kN
>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3 Ke7 4.Ke4 Kf7 5.Rd6 Ke7 6.Ke5 Kf7 7.Kf5 Ke7 8.Rd1 Kf7
>9.Rd7+ Ke8 10.Ke6 Kf8 11.Rc7 Kg8 12.Kf6 Kh8 13.Kg6 Kg8 14.Rc8#
>  +-  (#14)   Depth: 34/32   00:00:58  110546kN
>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3 Ke7 4.Ke4 Kf7 5.Rd6 Ke7 6.Ke5 Kf7 7.Kf5 Ke7 8.Rd1 Kf7
>9.Rd7+ Ke8 10.Ke6 Kf8 11.Rc7 Kg8 12.Kf6 Kh8 13.Kg6 Kg8 14.Rc8#
>  +-  (#14)   Depth: 35/32   00:00:59  114206kN
>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3 Ke7 4.Ke4 Kf7 5.Rd6 Ke7 6.Ke5 Kf7 7.Kf5 Ke7 8.Rd1 Kf7
>9.Rd7+ Ke8 10.Ke6 Kf8 11.Rc7 Kg8 12.Kf6 Kh8 13.Kg6 Kg8 14.Rc8#
>  +-  (#14)   Depth: 36/32   00:01:01  117848kN
>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3 Ke7 4.Ke4 Kf7 5.Rd6 Ke7 6.Ke5 Kf7 7.Kf5 Ke7 8.Rd1 Kf7
>9.Rd7+ Ke8 10.Ke6 Kf8 11.Rc7 Kg8 12.Kf6 Kh8 13.Kg6 Kg8 14.Rc8#
>  +-  (#14)   Depth: 37/32   00:01:02  121460kN
>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3 Ke7 4.Ke4 Kf7 5.Rd6 Ke7 6.Ke5 Kf7 7.Kf5 Ke7 8.Rd1 Kf7
>9.Rd7+ Ke8 10.Ke6 Kf8 11.Rc7 Kg8 12.Kf6 Kh8 13.Kg6 Kg8 14.Rc8#
>  +-  (#14)   Depth: 38/32   00:01:03  125082kN
>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3 Ke7 4.Ke4 Kf7 5.Rd6 Ke7 6.Ke5 Kf7 7.Kf5 Ke7 8.Rd1 Kf7
>9.Rd7+ Ke8 10.Ke6 Kf8 11.Rc7 Kg8 12.Kf6 Kh8 13.Kg6 Kg8 14.Rc8#
>  +-  (#14)   Depth: 39/32   00:01:05  128713kN
>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3 Ke7 4.Ke4 Kf7 5.Rd6 Ke7 6.Ke5 Kf7 7.Kf5 Ke7 8.Rd1 Kf7
>9.Rd7+ Ke8 10.Ke6 Kf8 11.Rc7 Kg8 12.Kf6 Kh8 13.Kg6 Kg8 14.Rc8#
>  +-  (#14)   Depth: 40/32   00:01:06  132344kN
>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3 Ke7 4.Ke4 Kf7 5.Rd6 Ke7 6.Ke5 Kf7 7.Kf5 Ke7 8.Rd1 Kf7
>9.Rd7+ Ke8 10.Ke6 Kf8 11.Rc7 Kg8 12.Kf6 Kh8 13.Kg6 Kg8 14.Rc8#
>  +-  (#14)   Depth: 41/32   00:01:07  135975kN
>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3 Ke7 4.Ke4 Kf7 5.Rd6 Ke7 6.Ke5 Kf7 7.Kf5 Ke7 8.Rd1 Kf7
>9.Rd7+ Ke8 10.Ke6 Kf8 11.Rc7 Kg8 12.Kf6 Kh8 13.Kg6 Kg8 14.Rc8#
>  +-  (#14)   Depth: 42/32   00:01:09  139605kN
>1.Rg6 Kc7 2.Kg2 Kd7 3.Kf3 Ke7 4.Ke4 Kf7 5.Rd6 Ke7 6.Ke5 Kf7 7.Kf5 Ke7 8.Rd1 Kf7
>9.Rd7+ Ke8 10.Ke6 Kf8 11.Rc7 Kg8 12.Kf6 Kh8 13.Kg6 Kg8 14.Rc8#
>  +-  (#14)   Depth: 43/32   00:01:10  143235kN
>
>(,  21.11.2005)



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Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.