James Edward Gray II wrote: > I don't want to spoil all the fun, in case anyone is still attempting > this quiz, but here's my solution to four of the seven variations: I've been working on adding checkmate detection to my Bangkok-based solution from last week. I added check detection, which was easy. Checkmate seems harder, unless I'm missing something. I need to figure out all possible moves for all pieces on the checked side, then make the move and re-check the board to see if the king is still in check. Is that what I have to do, or am I without clue? Jim -- Jim Menard, jimm / io.com, http://www.io.com/~jimm "Do Squeakers Dream of Electric Mice?" -- Mike Thomas (http://www.squeak.org)