Checkers is played by two opponents, on opposite sides of the game board. One player has the dark pieces and the other has the light pieces. Players alternate turns. A player may not move an opponent's piece. A move consists of moving a piece diagonally to an adjacent unoccupied square. If the adjacent square contains an opponent's piece, and the square immediately beyond it is vacant, the piece may be captured and then removed from the game by jumping over it.
Only the dark squares of the checkered board are used. A piece may move only diagonally into an unoccupied square. Capturing is mandatory. The player without pieces remaining, or who cannot move due to being blocked, loses the game.
None king pieces called men can move one step diagonally forwards, and capture an opponent's piece by moving two consecutive steps in the same line, jumping over the piece on the first step. Multiple enemy pieces can be captured in a single turn provided this is done by successive jumps made by a single piece. The jumps do not need to be in the same line and may 'zigzag' (change diagonal direction).
When a piece reaches the kings row, the farthest row forward, it becomes a king, and is marked by placing a 'k' on top of the piece. A king can move backwards and can capture backwards. Like men, a king can make successive jumps in a single turn provided that each jump captures an enemy man or king. A king's only advantage over a man is the ability to move and capture backwards as well as forwards.