What I could do, Tom, is to extract the board in the saved match and then try to parse it in GNU Backgammon. But I'm not sure how your bot parses the string but if it uses the GNU Backgammon code for that it might be the problem. I'll get back to you. -Øystein
tir. 17. mars 2026 kl. 00:25 skrev Tom Moulton <[email protected]>: > I have not looked at it for years, but I vaguely recall the board state > may have had the turn backwards, maybe like it was for the other player and > fibs rejected it > On 3/16/26 7:15 PM, Øystein Schønning-Johansen wrote: > > I'm not sure. I think I have to know more about the GammonBot code to > answer that question. But I notice some differences in how FIBS sends a > rawboard and how GNU Backgammon generates a rawboard for the external > player. > > -Øystein > > tir. 17. mars 2026 kl. 00:11 skrev Tom Moulton <[email protected]>: > >> Would the bug/issue found possibly cause the match resume bug the >> GammonBots have? >> On 3/16/26 6:08 PM, Øystein Schønning-Johansen wrote: >> >> I finally managed to solve my issue. But it took me a few hours of >> backtracking GNU Backgammon code. I am now happy again - frustration level >> is getting lower. >> >> -Øystein >> >> >> >> >> >> man. 16. mars 2026 kl. 16:15 skrev Øystein Schønning-Johansen < >> [email protected]>: >> >>> Oh! I have found the source of my problems: >>> >>> >>> https://cgit.git.savannah.gnu.org/cgit/gnubg.git/commit/play.c?id=bada21ae6315ddc49827ee789a0249d1fabcd2ef >>> >>> When generating FIBSBoards for the external player, GNU Backgammon will >>> alway set player 0 on turn. This change dates back to 2003 - 23 years ago. >>> So this is why I struggle to have an external player working both as player >>> 0 and player 1. >>> >>> I'll see if I can find a simple way to recreate the bug! (and maybe >>> suggest a patch). >>> >>> -Øystein >>> >>> tir. 24. feb. 2026 kl. 17:44 skrev Guido Flohr <[email protected] >>> >: >>> >>>> >>>> > On 22 Feb 2026, at 15:37, Øystein Schønning-Johansen < >>>> [email protected]> wrote: >>>> > So, has anyone else worked with these two systems, FIBS server and >>>> external player. Guido? Did you work with these two? >>>> >>>> Probably not. At the time, I had written my own version of FIBS by >>>> reverse-engineering, and I’m pretty sure that I have implemented the >>>> behaviour of gnubg, not that of FIBS. At least, I don’t remember nuances as >>>> you described them here. >>>> >>>> Cheers, >>>> Guido >>>> >>>
