Check if a move is pseudo-legal without generating the list of pseudo-legal moves

[fathzer]

Hello,

Thanks a lot for this very impressive library, very useful for people like me, totally unable to understand how bitmap works 😉

I saw that the issue 5, 76 and 112 (related to board.isMoveLegal returning true for some illegal moves) are closed.
I wonder how I can check if a move is pseudo-legal without generating the whole moves list. If it’s not possible, may I suggest adding a method to do that?

Here is my use case: A classical tree search optimization is to check, before generating any move, if a killer move, or a best move found in a transposition table, leads to a tree cut. In both cases we must ensure the move is pseudo-legal before generating the whole move list (because checking if a move is pseudo-legal is usually far faster than generating all moves).

Thanks for reading 😊

[bhlangonijr]

It's been almost a year without a response, but we really should add these functions at some point. If anyone out there has the time and would be willing to help, I’d greatly appreciate it! Otherwise, I'll try to tackle it myself when I can find some spare time. :)

[Oziomajnr]

I can help add this functionality.