Chex is a very small game: 32 tiles each 40 mm square and a tiny sheet of rules, all in a cute little box with no space to spare.The 32 pieces represent the 16 chess pieces per side in a normal chess game. Each side shuffles their own 16 tiles and places them face down. Then white draws his top tile and places it, with the piece oriented so it looks upright to him. Black then draws the top tile in his pile, and places so it touches whites' piece, either orthogonally or diagonally, oriented so it looks upright to him.At that point, white can either add another piece or move his piece on the board. A move must be a legal chess move and may not separate any element of the board - all Chex pieces much remain touching, even if it's just diagonally, when a move has ended. Thus you can 'pin' a piece by placing a new piece touching it on a far corner, so that if it moved, your newly placed piece would be unconnected to the main group. Since that's not legal, his piece can't move.The game ends in checkmate or stalemate. It's a stalemate if you cannot place your king except into check when you draw it.The game was originally published in 1982 by IQ Products as Chess Cards. The rules in this version were significantly different from those in the later self-published version. - BoardGameGeek