Author: Slater Wold
Date: 13:45:34 08/14/02
Go up one level in this thread
On August 14, 2002 at 15:05:08, Robert Hyatt wrote: >On August 14, 2002 at 10:51:21, Slater Wold wrote: > >>On August 14, 2002 at 10:44:00, Robert Hyatt wrote: >> >>>I have looked at this more carefully... >>> >>>There are interesting things going on that need even further analysis, >>>but my P3-750 notebook grabs onto b2 at 8 seconds. But at depth=12 it >>>drops to draw score and sticks there until depth 14... I am now >>>pretty sure this is a null-move issue because of the single tempo >>>that is at stake. Both sides threaten to promote and both sides must >>>stop the other while advancing its plan at the same time. A perfect >>>case for null-move breaking things... >>> >>>Here is the output (so far): >>> >>> (2) 10-> 5.76 1.53 1. ... Bc4 2. Re1 b2 3. Rb1 Bd3 4. >>> Rxb2 Bxg6 5. Rb7 d5 6. Rc7+ Kd6 7. >>> Rc8 >>> 11 6.41 1.55 1. ... Bc4 2. Re1 b2 3. Rb1 Bd3 4. >>> Rxb2 Bxg6 5. Rb8 d5 6. Rg8 Bf5 7. Rd8 >>> 11 8.97 ++ 1. ... b2!! >>> 11-> 11.35 1.14 1. ... b22 >>> 12 26.08 ++ 1. ... b2!! >>> 12 59.32 0.00 1. ... b2 2. g7 Bh7 3. Re1 Kb4 4. Re8 >>> Ka3 5. Rb8 Ka2 6. Ra8+ Kb3 7. Rb8+ >>> Ka2 >>> 12-> 1:00 0.00 1. ... b2 2. g7 Bh7 3. Re1 Kb4 4. Re8 >>> Ka3 5. Rb8 Ka2 6. Ra8+ Kb3 7. Rb8+ >>> Ka2 >>> 13 1:08 0.00 1. ... b2 2. g7 Bh7 3. Re1 Kb4 4. Re8 >>> Ka3 5. Rb8 Ka2 6. Ra8+ Kb3 7. Rb8+ >>> Ka2 >>> 13-> 1:10 0.00 1. ... b2 2. g7 Bh7 3. Re1 Kb4 4. Re8 >>> Ka3 5. Rb8 Ka2 6. Ra8+ Kb3 7. Rb8+ >>> Ka2 >>N> 14 1:16 ++ 1. ... b2!! >> >>So your notebook gets a better score and in better time, than my 2x1.73Ghz >>machine? Ah, the beauty of SMP. > > >Note that I am running version 19.0, which is a bit different than yours. >That probably accounts for much of the difference. Ah! Makes sense. Seems like it's working, in this position anyway. > > > >> >>I see you had the display problem too. :) >> >>I would think it would be easy to see Bh7 stops the promotion of white just long >>enough to promote, and of course, win. >> >>The win is deep, but it's pretty textbook. I just thought it would be "easy" >>(or at least, easier) for computers. > > >I let it run for a _long_ time and don't see a win. I saw scores of about >+2 eventually, but nothing like +9 or whatever... Do you think you can fix it? Or perhaps help it out? Or are you just not worried about it? > > > >> >>Some engines get this no problem, some don't get it at all.
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