The board and the moves
American Checkers — English Draughts — is played on an 8×8 board with twelve pieces each, arranged on the dark squares. Play happens entirely on the dark squares, so half the board is never used.
An ordinary piece, a man, moves one square diagonally forward only. You capture by jumping over an adjacent enemy piece into the empty square directly beyond it, and the jumped piece is removed. A man that reaches the far back row is crowned a king and may from then on move and jump diagonally in both directions.
You win by capturing all of your opponent’s pieces, or by leaving them with no legal move — a player who cannot move loses, even with pieces still on the board.