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Comparison data of Crafty vs Rybka that I promised 2 days ag
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Steven Edwards



Joined: 13 Mar 2006
Posts: 3073
Location: Mud, Bugs, and Taxes, NH, USA
PostPost subject: Re: Movei added to Crafty vs Rybka comaprison data    Posted: Sat Jun 02, 2007 2:04 am Reply to topic Reply with quote
bob wrote:
One common "sanity test" I do in crafty is to feed it several thousand FEN positions, and have it evaluate each one 4 times. First, as the position is entered, then I flip the board vertically and swap the colors of all pieces, to give me a second position. I then flip the original position horizontally which just swaps the a file with the h-file and so forth, for a third position. And I take the second position (the vertically flipped position) and also flip it horizontally for a 4th position. Each position must produce the _same_ evaluation except that the sign must change when I invert white and black pieces. Any single failure causes a massive bug-hunt until it goes away...

Apparently the test set doesn't include positions with non empty castling availability as I don't see how these would survive a reflection about the Y axis.

--------

Symbolic has a routine that reflects the board about the X axis and swaps the colors. During some testing modes, this is connected to the move path enumerator (perft) along with calls to the position evaluator before and after the exchange. This enables testing of huge numbers of positions in an orderly fashion. The enumerator has similar hooks for other complex or tricky routines, like the fast check marker and the checks only generator.
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Subject Author Date/Time
Comparison data of Crafty vs Rybka that I promised 2 days ag Les Fri Jun 01, 2007 3:12 am
      Re: Comparison data of Crafty vs Rybka that I promised 2 day Dann Corbit Fri Jun 01, 2007 3:14 am
      Movei added to Crafty vs Rybka comaprison data Les Fri Jun 01, 2007 4:06 am
            Re: Movei added to Crafty vs Rybka comaprison data Robert Hyatt Sat Jun 02, 2007 1:41 am
                  Re: Movei added to Crafty vs Rybka comaprison data Steven Edwards Sat Jun 02, 2007 2:04 am
                        Re: Movei added to Crafty vs Rybka comaprison data Robert Hyatt Sat Jun 02, 2007 5:56 am
                  Re: Movei added to Crafty vs Rybka comaprison data Dann Corbit Sat Jun 02, 2007 4:00 am
                        Re: Movei added to Crafty vs Rybka comaprison data Dann Corbit Sat Jun 02, 2007 4:48 am
                              Re: Movei added to Crafty vs Rybka comaprison data Robert Hyatt Sat Jun 02, 2007 6:00 am
                                    Re: Movei added to Crafty vs Rybka comaprison data Dann Corbit Sat Jun 02, 2007 7:18 am
                                          Re: Movei added to Crafty vs Rybka comaprison data Robert Hyatt Sun Jun 03, 2007 8:38 pm
                                                Re: Movei added to Crafty vs Rybka comaprison data Les Sun Jun 03, 2007 11:28 pm
                                                      Re: Movei added to Crafty vs Rybka comaprison data Edsel Apostol Mon Jun 04, 2007 7:10 am
                                                            Re: Movei added to Crafty vs Rybka comaprison data Robert Hyatt Mon Jun 04, 2007 7:06 pm
                                                                  Re: Movei added to Crafty vs Rybka comaprison data Edsel Apostol Tue Jun 05, 2007 6:15 am
                                                                        Re: Movei added to Crafty vs Rybka comaprison data Dann Corbit Tue Jun 05, 2007 7:00 pm
                                                                              Re: Movei added to Crafty vs Rybka comaprison data Edsel Apostol Wed Jun 06, 2007 3:29 am
                                                                                    Re: Movei added to Crafty vs Rybka comaprison data Dann Corbit Wed Jun 06, 2007 3:44 am
                                                                                          Re: Movei added to Crafty vs Rybka comaprison data Edsel Apostol Wed Jun 06, 2007 3:52 am
                                                                        Re: Movei added to Crafty vs Rybka comaprison data Robert Hyatt Wed Jun 06, 2007 1:16 am
                                                                  Re: Movei added to Crafty vs Rybka comaprison data Dann Corbit Tue Jun 05, 2007 7:03 pm
                                                                        Re: Movei added to Crafty vs Rybka comaprison data Gerd Isenberg Tue Jun 05, 2007 8:04 pm
                                                      Re: Movei added to Crafty vs Rybka comaprison data Robert Hyatt Mon Jun 04, 2007 7:02 pm
                                                            Re: Movei added to Crafty vs Rybka comaprison data Gerd Isenberg Mon Jun 04, 2007 9:39 pm
                                                                  Re: Movei added to Crafty vs Rybka comaprison data Gerd Isenberg Tue Jun 05, 2007 7:55 pm
                                                                        Re: Movei added to Crafty vs Rybka comaprison data Uri Blass Tue Jun 05, 2007 9:25 pm
                                                                        Re: Movei added to Crafty vs Rybka comaprison data Gerd Isenberg Wed Jun 06, 2007 10:15 pm
                        Re: Movei added to Crafty vs Rybka comaprison data Robert Hyatt Sat Jun 02, 2007 5:58 am
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