TalkChess.com

[Dustin Yoder]

Here is a rough beginning for a pseudo outline for the algorithm I described above. I am posting this as a rough beginning and I would like any comments or improvements on any of these. I'll keep editing the list until I get something that seems like it might work on paper.

--DETERMINE PIECES THAT CANNOT MOVE
-Check castling rights. (Do NOT allow the king and rooks to be moved if they can still castle in the final position)
-Check if any pawns in the final position are still in their beginning position (these pawns are NOT allowed to move if this is the case)

--DETERMINE SOME SPECIAL CASES THAT WE SHOULD CONSIDER BEFORE MOVING PIECES AROUND
-Do we need to promote any pawns (check for 2+queens, 3+knights, 2+bishops on same color, 3+rooks) We will need to promote a pawn to accomplish these requirements
-Are there any pawns doubled up or worse (pawns only change file by capturing)
-Are any pawns behind enemy pawns? (pawns only change file by capturing)

more coming soon.