In my iterative deepening loop, I need to fetch the PV after each new depth is completely searched in order to print it to the screen and, after the last level, to fetch the best move and make it.

I have been having loads of trouble with my engine after trying to rewrite it, and I think I have ...

Thanks for the helpful debugging tip. I modified stockfish to print out the perft(MAXDEPTH-1) results, and went through and found the exact move path that generated the error.

It turns out my "attacks" function was malfunctioning (the function that determines if a square is attacked). I had ...

I am working through some bugs in my chess engine. I am testing my engine's perft function on "r3k2r/Pppp1ppp/1b3nbN/nP6/BBP1P3/q4N2/Pp1P2PP/R2Q1RK1 w kq - 0 1".

The correct results (verified by me with stockfish) can be found here: http://chessprogramming.wikispaces.com/Perft+Results. It is under ...