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Fizbo 1.9 released
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Anton Podkopaev



Joined: 22 Jan 2017
Posts: 81
Location: Russia

PostPost subject: Re: Fizbo 1.9 released    Posted: Wed Sep 20, 2017 2:48 am Reply to topic Reply with quote

Another instance of the same bug (here, 10... Bxg3? is suggested at 19/21+ and 20/37+):

[d]r1bqk2r/pp3ppp/2nbp3/2p2n2/8/NP3NP1/PBPP1PBP/R2Q1RK1 b kq - 1 10
BR :: BB BQ BK ::    BR
BP BP ::    :: BP BP BP
   :: BN BB BP ::    ::
::    BP    :: BN ::    
   ::    ::    ::    ::
WN WP ::    :: WN WP    
WP WB WP WP    WP WB WP
WR    :: WQ :: WR WK    


Code:
FEN: r1bqk2r/pp3ppp/2nbp3/2p2n2/8/NP3NP1/PBPP1PBP/R2Q1RK1 b kq - 1 10

Fizbo19x64:
 18   00:00    1   21   +0,85   10. ... 0-0
 19/21+   00:00    8k   338k   +1,45   10. ... Bxg3 11.fxg3 b5 12.Nxb5 Nfd4 13.Bxd4 cxd4 14.Nxa7
 19/37   01:28    94 140k   1 064k   +0,85   10. ... 0-0 11.Nc4 Bb8 12.Re1 f6 13.Ba3 b5 14.Ne3
 20/37+   01:31    96 555k   1 055k   +1,45   10. ... Bxg3 11.fxg3 b5 12.Nxb5 Nfd4 13.Bxd4 cxd4 14.Ng5
 20/42   02:23    153 312k   1 071k   +0,59   10. ... f6 11.c3 e5 12.Nc2 h5 13.d4 h4 14.Re1
 21/42   02:46    177 686k   1 067k   +0,78   10. ... f6 11.c3 e5 12.Nc4 0-0 13.d4 exd4 14.cxd4
 22/42   04:34    292 615k   1 066k   +0,82   10. ... f6 11.c3 e5 12.Nc4 0-0 13.d4 exd4 14.cxd4
 23/47   17:36    1 132 664k   1 072k   +1,02   10. ... f6 11.c3 0-0 12.d4 cxd4 13.Nxd4 Nfxd4 14.cxd4
 23/47   19:14    1 235 291k   1 070k   +1,02   10. ... f6 11.c3 0-0 12.d4 cxd4 13.Nxd4 Nfxd4 14.cxd4
Best move: f6, Value: +1,02, Depth: 23/47, Time: 19:14,403, 1 235 290 643 Nodes, 1 070k


(The 2 GB hash was 65% full after 4.5 minutes of analysis.)

This example shows a more typical behaviour of the search function - namely, that a nonsensical variation only appears in a few early iterations and then vanishes.

The impact of the bug on the overall playing strength might be small to medium, though (fixing it may make Fizbo the 4th strongest but still not an equal rival to SF, Komodo and Houdini yet). Even if it occurs once per game or a few games, it just affects the move ordering in the search on that single move and usually results in a small, if any, inaccuracy played because of a slower (thus shallower) search than normal.
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Subject Author Date/Time
Fizbo 1.9 released Youri Matiounine Sat Dec 31, 2016 6:14 pm
      Re: Fizbo 1.9 released Vael Jean-Paul Sat Dec 31, 2016 6:23 pm
      Re: Fizbo 1.9 released Jason Coombs Sat Dec 31, 2016 6:53 pm
            Re: Fizbo 1.9 released Youri Matiounine Sat Dec 31, 2016 7:21 pm
                  Re: Fizbo 1.9 released Jason Coombs Sat Dec 31, 2016 10:47 pm
                        Re: Fizbo 1.9 released Youri Matiounine Sun Jan 01, 2017 2:52 pm
                              Re: Fizbo 1.9 released Adam Hair Sun Jan 01, 2017 8:45 pm
      Re: Fizbo 1.9 released Damir Desevac Sat Dec 31, 2016 7:06 pm
      Re: Fizbo 1.9 released daniel jose Sat Dec 31, 2016 7:16 pm
      Re: Fizbo 1.9 released Graham Banks Sat Dec 31, 2016 7:38 pm
      Re: Fizbo 1.9 released Gabor Szots Sat Dec 31, 2016 9:10 pm
            Re: Fizbo 1.9 released Youri Matiounine Sat Dec 31, 2016 10:37 pm
      Re: Fizbo 1.9 released Herbert L Sat Dec 31, 2016 10:55 pm
      Re: Fizbo 1.9 released Carl Langan Sun Jan 01, 2017 12:17 am
      Re: Fizbo 1.9 released Guenther Simon Sun Jan 01, 2017 4:49 pm
      Re: Fizbo 1.9 released Anton Ross Wed Jan 04, 2017 5:31 pm
            Re: Fizbo 1.9 released Youri Matiounine Wed Jan 04, 2017 11:02 pm
                  Re: Fizbo 1.9 released Jouni Uski Wed Feb 01, 2017 4:18 pm
                        Re: Fizbo 1.9 released Anton Podkopaev Mon Sep 11, 2017 7:43 pm
                              Re: Fizbo 1.9 released Anton Podkopaev Mon Sep 11, 2017 7:52 pm
                                    Re: Fizbo 1.9 released Carl Langan Mon Sep 11, 2017 9:19 pm
                              Re: But Fizbo have a big technical problem! Frank Quisinsky Tue Sep 12, 2017 6:25 am
                                    Re: But Fizbo have a big technical problem! Anton Podkopaev Wed Sep 13, 2017 12:32 am
                                          Re: But Fizbo have a big technical problem! Graham Banks Wed Sep 13, 2017 12:39 am
                                                Re: But Fizbo have a big technical problem! Anton Podkopaev Wed Sep 13, 2017 12:56 am
                                                      Re: But Fizbo have a big technical problem! Graham Banks Wed Sep 13, 2017 1:50 am
                                                            Re: But Fizbo have a big technical problem! Anton Podkopaev Wed Sep 13, 2017 2:28 am
                                                                  Re: But Fizbo have a big technical problem! Anton Podkopaev Wed Sep 13, 2017 3:35 am
                                                            Re: But Fizbo have a big technical problem! Anton Podkopaev Wed Sep 13, 2017 4:07 am
                                                                  Re: 32-Bit? Brendan J. Norman Wed Sep 13, 2017 5:04 am
                                                                        Re: 32-Bit? Anton Podkopaev Wed Sep 13, 2017 11:53 pm
                                                                              Re: 32-Bit? Graham Banks Fri Sep 15, 2017 9:37 pm
                                                                                    Re: 32-Bit? Anton Podkopaev Fri Sep 15, 2017 10:51 pm
                                                                                          Re: 32-Bit? Anton Podkopaev Fri Sep 15, 2017 11:14 pm
                                                                                          Re: 32-Bit? Anton Podkopaev Fri Sep 15, 2017 11:48 pm
                                                                                          Re: 32-Bit? Anton Podkopaev Sat Sep 16, 2017 12:45 am
                                                                                    Re: 32-Bit? Jason Coombs Sat Sep 16, 2017 2:21 am
                                                                                          Re: 32-Bit? Graham Banks Sat Sep 16, 2017 4:10 am
                                                                        Re: 32-Bit? Anton Podkopaev Thu Sep 14, 2017 1:04 am
                                          Re: But Fizbo have a big technical problem! Frank Quisinsky Sat Sep 16, 2017 4:53 am
                                                Re: But Fizbo have a big technical problem! Anton Podkopaev Sat Sep 16, 2017 4:42 pm
      Re: Fizbo 1.9 released Anton Podkopaev Tue Sep 19, 2017 11:48 pm
            Re: Fizbo 1.9 released Dann Corbit Tue Sep 19, 2017 11:56 pm
                  Re: Fizbo 1.9 released Anton Podkopaev Wed Sep 20, 2017 12:08 am
                  Re: Fizbo 1.9 released Anton Podkopaev Wed Sep 20, 2017 12:29 am
                        Re: Fizbo 1.9 released Dann Corbit Wed Sep 20, 2017 12:33 am
                              Re: Fizbo 1.9 released Anton Podkopaev Wed Sep 20, 2017 1:34 am
                                    Re: Fizbo 1.9 released Dann Corbit Wed Sep 20, 2017 5:34 am
            Re: Fizbo 1.9 released Anton Podkopaev Wed Sep 20, 2017 2:48 am
      Re: Fizbo 1.9 released Anton Podkopaev Wed Sep 20, 2017 4:02 am
      Re: Fizbo 1.9 released Jason Coombs Wed Dec 06, 2017 8:28 pm
            Re: Fizbo 1.9 released Graham Banks Wed Dec 06, 2017 8:54 pm
                  Re: Fizbo 1.9 released Jason Coombs Wed Dec 06, 2017 9:20 pm
                        Re: Fizbo 1.9 released Graham Banks Wed Dec 06, 2017 10:02 pm
                              Re: Fizbo 1.9 released Guenther Simon Wed Dec 06, 2017 10:17 pm
                                    Re: Fizbo 1.9 released Jason Coombs Wed Dec 06, 2017 10:26 pm
                                          Re: Fizbo 1.9 released T. Poppins Thu Dec 07, 2017 12:23 am
                                                Re: Fizbo 1.9 released Jason Coombs Thu Dec 07, 2017 1:11 am
                              Re: Fizbo 1.9 released Jason Coombs Wed Dec 06, 2017 10:25 pm
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