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Subject: Re: Problem with Rybka 1.01 ??

Author: Vasik Rajlich

Date: 02:19:19 12/24/05

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On December 23, 2005 at 21:51:21, Uri Blass wrote:

>On December 23, 2005 at 20:25:19, Vasik Rajlich wrote:
>
>>On December 22, 2005 at 18:30:28, William Penn wrote:
>>
>>>Sorry, I posted the wrong position. Here is the correct one:
>>>[D]r2q4/1p1P3p/2p3pk/P7/8/4Q3/6PP/3R2K1 b - -
>>>I let that first test run for over 124 minutes, but no joy. It was hung.
>>>Then I restarted my computer and tried again (see below). Same thing, it's
>>>definitely hanging.
>>>So it looks like I'll be reverting to the 1.0 version.
>>>
>>>CPU0: AuthenticAMD x86 Family 6 Model 8 Stepping 1 1998 MHz
>>>GUI: Tablebases with 5 pieces found! [Cache: 16 MB + internal 10.31 MB]
>>>Engine: Rybka 1.01 Preview 2 32-bit (704 MB)
>>>by Vasik Rajlich
>>>  3.00	 0:00 	-1.76 	36...Kg7 (5.389) 114
>>>  4.00	 0:00 	-1.92 	36...Kg7 (9.105) 118
>>>  5.00	 0:00 	-2.07 	36...Kg7 37.Qd4+ Kh6 (7.660) 62
>>>  6.00	 0:00 	-2.18 	36...Kg7 37.Qd4+ Kg8 38.Re1 (24.701) 100
>>>  7.00	 0:00 	-2.55 	36...Kg7 37.Qe5+ Kg8 38.Qe6+ Kg7 39.Rf1 (39.294) 107
>>>  8.00	 0:00 	-3.79 	36...Kg7 37.Qe5+ Kg8 38.Qe6+ Kh8 39.Rf1 b6 (78.468) 116
>>>  9.00	 0:00 	-4.82 	36...Kg7 37.Qe5+ Kg8 38.Qe6+ Kh8 39.Rf1 Qxa5 40.Qf6+ Kg8
>>>41.Qf7+ Kh8 42.Qe8+ Kg7 (101.631) 120
>>> 10.00	 0:01 	-6.29 	36...Kg7 37.Qe5+ Qf6 38.Qxf6+ Kxf6 39.d8Q+ Rxd8 40.Rxd8 c5
>>>41.Rb8 Ke6 42.Rxb7 Kd6 43.Rxh7 (290.685) 149
>>> 11.01	 0:08 	-7.17 	36...Kg7 37.Qe5+ Qf6 38.Qxf6+ Kxf6 39.d8Q+ Rxd8 40.Rxd8 c5
>>>41.Rb8 h5 42.Rxb7 c4 43.Rb6+ (1.307.096) 158
>>> 12.01	 0:10 	-7.23 	36...Kg7 37.Qe5+ Qf6 38.Qxf6+ Kxf6 39.d8Q+ Rxd8 40.Rxd8 c5
>>>41.Rb8 c4 42.Rxb7 c3 43.Rxh7 (1.672.331) 159
>>> 13.01	 0:18 	-9.28 	36...Kg7 37.Qe5+ Kg8 38.Qe6+ Kh8 39.Rf1 Qxa5 40.Qf6+ Kg8
>>>41.Qf7+ Kh8 42.Qe8+ Kg7 43.Rf7+ (2.961.282) 165
>>> 14.01	 0:29 	-10.12	36...Kg7 37.Qe5+ Kg8 38.Qe6+ Kh8 39.Rf1 Qxa5 40.Qf6+ Kg8
>>>41.Qf7+ Kh8 42.Qe8+ Kg7 43.Rf7+ (4.699.288) 165
>>> 15.01	 0:42 	-10.12	36...Kg7 37.Qe5+ Kg8 38.Qe6+ Kh8 39.Rf1 Qxa5 40.Qf6+ Kg8
>>>41.Qf7+ Kh8 42.Qe8+ Kg7 43.Rf7+ (6.657.777) 160
>>> 16.01	 1:10 	-10.18	36...Kg7 37.Qe5+ Kg8 38.Qe6+ Kh8 39.Rf1 Qxa5 40.Qf6+ Kg8
>>>41.Qf7+ Kh8 42.Qe8+ Kg7 43.Rf7+ (10.648.036) 155
>>> 17.01	 3:15 	-11.03	36...Kg7 37.Qe5+ Kg8 38.Qe6+ Kh8 39.Rf1 Qxa5 40.Qf6+ Kg8
>>>41.Qf7+ Kh8 42.Qe8+ Kg7 43.Rf7+ (28.632.692) 149
>>> 18.01	 5:26 	-11.03	36...Kg7 37.Qe5+ Kg8 38.Qe6+ Kh8 39.Rf1 Qxa5 40.Qf6+ Kg8
>>>41.Qf7+ Kh8 42.Qe8+ Kg7 43.Rf7+ (46.837.423) 147
>>> 19.01	 9:06 	-11.09	36...Kg7 37.Qe5+ Kg8 38.Qe6+ Kh8 39.Rf1 Qxa5 40.Qf6+ Kg8
>>>41.Qf7+ Kh8 42.Qe8+ Kg7 43.Rf7+ (80.727.798) 151
>>>best move: Kh6-g7 time: 171:55.969 min  n/s: 14.320  nodes: 144.239.616
>>>
>>>WP
>>
>>William,
>>
>>you should always be able to stop the analysis by just moving to a different
>>position. If not, then there is a bug there which I am not yet aware of.
>>
>>Vas
>
>Note that rybka beta with the same hash has no problem to get depth 20
>If Rybka preview does not get it in a reasonable time then there is a problem
>
>New game
>r2q4/1p1P3p/2p3pk/P7/8/4Q3/6PP/3R2K1 b - - 0 1
>
>Analysis by Rybka 1.0 Beta 32-bit:
>
>1...Kg7
>  +-  (1.87)   Depth: 3   00:00:00
>1...Kg7
>  +-  (1.98)   Depth: 4   00:00:00
>1...Kg7 2.Qc3+ Kh6
>  +-  (2.07)   Depth: 5   00:00:00
>1...Kg7 2.Qc3+ Kh6 3.Qb4
>  +-  (2.07)   Depth: 6   00:00:00  8kN
>1...Kg7 2.Qc3+ Kh6 3.Qc1+ g5 4.Qb2
>  +-  (2.75)   Depth: 7   00:00:00  25kN
>1...Kg7 2.Qc3+ Kg8 3.Qb3+ Kg7 4.Qb2+ Kf7 5.Rf1+ Ke6
>  +-  (4.00)   Depth: 8   00:00:01  46kN
>1...Kg7 2.Qe5+ Kg8 3.Qe6+ Kg7 4.Rf1 Qxa5 5.Rf7+ Kh6
>  +-  (4.82)   Depth: 9   00:00:01  73kN
>1...Kg7 2.Qe5+ Qf6 3.Qxf6+ Kxf6 4.d8Q+ Rxd8 5.Rxd8 Ke7 6.Rd3
>  +-  (6.23)   Depth: 10   00:00:03  271kN
>1...Kg7 2.Qe5+ Qf6 3.Qxf6+ Kxf6 4.d8Q+ Rxd8 5.Rxd8 h6 6.Rd7
>  +-  (7.17)   Depth: 11   00:00:05  540kN
>1...Kg7 2.Qe5+ Qf6 3.Qxf6+ Kxf6 4.d8Q+ Rxd8 5.Rxd8 c5 6.Rd7
>  +-  (7.17)   Depth: 12   00:00:13  1099kN
>1...Kg7 2.Qe5+ Kg8 3.Qe6+ Kg7 4.Rf1 Qxa5 5.Rf7+ Kh6 6.Qe3+
>  +-  (9.28)   Depth: 13   00:00:19  1707kN
>1...Kg7 2.Qe5+ Kg8 3.Qe6+ Kg7 4.Rf1 Qxa5 5.Rf7+ Kh6 6.Qe3+
>  +-  (10.12)   Depth: 14   00:00:28  2279kN
>1...Kg7 2.Qe5+ Kg8 3.Qe6+ Kg7 4.Rf1 Qxa5 5.Rf7+ Kh6 6.Qe3+
>  +-  (10.12)   Depth: 15   00:00:39  2908kN
>1...Kg7 2.Qe5+ Kg8 3.Qe6+ Kg7 4.Rf1 Qxa5 5.Rf7+ Kh6 6.Qe3+
>  +-  (10.18)   Depth: 16   00:01:03  4027kN
>1...Kg7 2.Qe5+ Kg8 3.Qe6+ Kg7 4.Rf1 Qxa5 5.Rf7+ Kh6 6.Qe3+
>  +-  (11.03)   Depth: 17   00:01:56  6815kN
>1...Kg7 2.Qe5+ Kg8 3.Qe6+ Kg7 4.Rf1 Qxa5 5.Rf7+ Kh6 6.Qe3+
>  +-  (11.03)   Depth: 18   00:04:05  12957kN
>1...Kg7 2.Qe5+ Kg8 3.Qe6+ Kg7 4.Rf1 Qxa5 5.Rf7+ Kh6 6.Qe3+
>  +-  (11.09)   Depth: 19   00:07:46  23502kN
>1...Kg7 2.Qe5+ Kg8 3.Qe6+ Kg7 4.Rf1 Qxa5 5.Rf7+ Kh6 6.Qe3+
>  +-  (11.94)   Depth: 20   00:16:42  49807kN
>
>(,  24.12.2005)

Yes, but this is a known problem :)

The new version is very inefficiently resolving mates. The Beta does not resolve
mates at all. Rybka 1.1 will resolve mates, but more efficiently.

Vas




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