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Hamsters randomizer in action
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Alessandro Scotti
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PostPost subject: Hamsters randomizer in action    Posted: Sun Jun 03, 2007 7:24 pm Reply to topic Reply with quote
After the comments from Michael and Ron I've managed to spend some time with Hamsters. As a result, my wife won't talk to me. As a side effect though, I think I've found something.

In this position (best move is Kb1):

[D]6k1/3p4/3p4/3P4/4P1p1/6P1/8/K7 w - - 0 1
   ::    ::    :: BK ::
::    :: BP ::    ::    
   ::    BP    ::    ::
::    :: WP ::    ::    
   ::    :: WP :: BP ::
::    ::    ::    WP    
   ::    ::    ::    ::
WK    ::    ::    ::    


I get the following PV:

Code:

28/46 0:03.45 0 3582109 Kb2 Kh8 Kc3 Kg7 Kd4 Kf6 Ke3 Kg5 Kd4 Kf6
28/46 0:04.22 190 4472111 Kb1 Kg7 Kc1 Kh7 Kc2 Kg7 Kc3 Kh6 Kd4 Kg6 e5 dxe5+ Kxe5 Kf7 Kf5 Ke7 Kxg4 Kd6 Kf5 Ke7 g4...
29/46 0:04.99 0 5317284 Kb1 Kg7 Kc1 Kh7 Kc2 Kg7 Kc3 Kf7 Kd4 Kf6 Ke3 Kg5 Kd4 Kf6
30/48 0:06.27 240 6471878 Kb1 Kg7 Kc1 Kh7 Kc2 Kg7 Kc3 Kh7 Kd4 Kh6 e5 Kg6 Ke4 dxe5 Kxe5 Kf7 Kf5 Ke7 Kxg4 Kf6 Kf4 d6 g4...
31/48 0:07.91 255 8076986 Kb1 Kg7 Kc1 Kh7 Kc2 Kg6 Kd3 Kf6 Kd4 Kg6 e5 Kf7 exd6 Kf6 Ke4 Kg6 Kf4 Kf7 Kxg4 Kf6 Kh5 Kf7 g4...


Or variations thereof by playing with some parameters:

Code:

28/46 0:02.69 37 2754395 Kb1 Kg7 Kc1 Kh6 Kd2 Kh5 Kc3 Kh6 Kd4 Kg6 e5 Kf7 exd6 Kf6 Ke4 Kg6 Kf4 Kf6 Kxg4...
29/47 0:03.73 125 3680504 Kb1 Kg7 Kc1 Kh6 Kd2 Kh5 Kc3 Kh6 Kd4 Kg6 e5 Kg5 Ke4 Kg6 exd6 Kg5 Ke5 Kg6 Kf4 Kf6 Kxg4...
30/49 0:05.83 170 5676962 Kb1 Kg7 Kc1 Kh6 Kd2 Kh5 Kc3 Kh6 Kd4 Kg6 e5 Kf7 exd6 Kf6 Ke4 Kg6 Kf4 Kf6 Kxg4...
31/49 0:08.61 51 8711860 Kb1 Kg7 Kc1 Kh6 Kd2 Kg6 Kd3 Kh6 Kd4 Kh5 e5 Kg6 Ke4 Kf7 exd6 Kg6 Kf4 Kf6 Kxg4...
32/54 0:12.11 260 12086482 Kb1 Kg7 Kc1 Kh6 Kd2 Kg6 Kd3 Kh6 Kd4 Kg6 e5 Kf5 exd6 Kf6 Ke4 Kg6 Kf4 Kf6 Kxg4...


There are huge score drops in some plies that suggest a serious bug somewhere. I've spent a few hours poking around to no avail, and yet I think this time asking for suggestions on the bug would be too much even for the collective wisdom of the CCC! Smile
So my question is... how do I debug something like this that happens million nodes away from the root?!? Surprised
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Display posts from previous:   
Subject Author Date/Time
Hamsters randomizer in action Alessandro Scotti Sun Jun 03, 2007 7:24 pm
      Re: Hamsters randomizer in action Gerd Isenberg Sun Jun 03, 2007 8:25 pm
            Re: Hamsters randomizer in action Alessandro Scotti Sun Jun 03, 2007 8:33 pm
                  Re: Hamsters randomizer in action Gerd Isenberg Sun Jun 03, 2007 8:43 pm
      Re: Hamsters randomizer in action Michael Sherwin Mon Jun 04, 2007 2:04 am
      Re: Hamsters randomizer in action Pradu Kannan Mon Jun 04, 2007 2:33 am
      Re: Hamsters randomizer in action Tony Mon Jun 04, 2007 3:35 am
            Re: Hamsters randomizer in action Pradu Kannan Mon Jun 04, 2007 6:24 am
                  Re: Hamsters randomizer in action Tony Mon Jun 04, 2007 6:47 am
                        Re: Hamsters randomizer in action Gerd Isenberg Mon Jun 04, 2007 7:12 am
      Re: Hamsters randomizer in action H.G.Muller Mon Jun 04, 2007 10:26 am
            Re: Hamsters randomizer in action Tony Mon Jun 04, 2007 11:13 am
                  Re: Hamsters randomizer in action H.G.Muller Mon Jun 04, 2007 11:49 am
            Re: Hamsters randomizer in action Alessandro Scotti Mon Jun 04, 2007 3:47 pm
                  Re: Hamsters randomizer in action Guetti Mon Jun 04, 2007 4:21 pm
                  Re: Hamsters randomizer in action H.G.Muller Mon Jun 04, 2007 6:16 pm
                        Re: Hamsters randomizer in action Alessandro Scotti Tue Jun 05, 2007 10:47 am
                              Re: Hamsters randomizer in action H.G.Muller Tue Jun 05, 2007 11:53 am
                                    Re: Hamsters randomizer in action Alessandro Scotti Tue Jun 05, 2007 12:39 pm
                                          Re: Hamsters randomizer in action H.G.Muller Tue Jun 05, 2007 1:13 pm
                                                Re: Hamsters randomizer in action Uri Blass Tue Jun 05, 2007 1:27 pm
                                                      Re: Hamsters randomizer in action H.G.Muller Tue Jun 05, 2007 1:46 pm
                                                            Re: Hamsters randomizer in action Uri Blass Tue Jun 05, 2007 10:33 pm
                                                Re: Hamsters randomizer in action Alessandro Scotti Wed Jun 06, 2007 10:32 pm
                                                      Re: Hamsters randomizer in action Alessandro Scotti Thu Jun 07, 2007 12:01 am
                                                            Re: Hamsters randomizer in action Pradu Kannan Thu Jun 07, 2007 8:13 am
                                                                  Re: Hamsters randomizer in action Alessandro Scotti Thu Jun 07, 2007 6:01 pm
                  Re: Hamsters randomizer in action Spock Mon Jun 04, 2007 7:17 pm
      Re: Hamsters randomizer in action Ron Murawski Tue Jun 05, 2007 10:23 pm
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