💡📝H. G. Muller wrote on Fri, Jul 17, 2020 11:36 AM UTC:
What would be the best place to read up on GAME code? There seems to be a lot of material about it here, but it seems that GAME code evolved a lot, and not everything is up to date.
One thing that is not clear to me after glancing through one of the tutorials is how these code snippets are embedded in the larger design of the server. I would have expected checking a given move for pseudo-legality to be a different task from performing a move for updating the position, but I did not recognize that in the examples. E.g. the routine for Pawn moves seems to automatically clear the e.p. square. Which seems a problem if the move later turns out to be illegal (e.g. because the victim on the e.p. square was sheltering your King). Is there an automatic takeback when you say 'die' at any stage?
I am not worrying so much about elementary leapers, sliders and their compounds. (Although a very large fraction of CVs don't use anything more than that.) The real challenges are more complex moves, such as bent sliders, hook movers, locust captureres. Espcially if they are not uniquely specified by just two squares.
What would be the best place to read up on GAME code? There seems to be a lot of material about it here, but it seems that GAME code evolved a lot, and not everything is up to date.
One thing that is not clear to me after glancing through one of the tutorials is how these code snippets are embedded in the larger design of the server. I would have expected checking a given move for pseudo-legality to be a different task from performing a move for updating the position, but I did not recognize that in the examples. E.g. the routine for Pawn moves seems to automatically clear the e.p. square. Which seems a problem if the move later turns out to be illegal (e.g. because the victim on the e.p. square was sheltering your King). Is there an automatic takeback when you say 'die' at any stage?
I am not worrying so much about elementary leapers, sliders and their compounds. (Although a very large fraction of CVs don't use anything more than that.) The real challenges are more complex moves, such as bent sliders, hook movers, locust captureres. Espcially if they are not uniquely specified by just two squares.