Extreme Checkers is like playing two games of Anglo-American Checkers (Draughts) at the same time, with War Variant Hasami Shogi-style custodian capture in addition capture by jump.
 
Object: Capture all your opponent's men ("Checkers") on either the black or the red squares by jumping over them or sandwiching them, or stalemate the opponent so they has no moves.
 
Checkers can only move diagonally forward, either by sliding to an adjacent empty square or by jumping over an enemy piece to a vacant square on the other side. Jumping over a piece captures it. Capturing by jump is mandatory, and you must keep jumping and capturing as long as it is possible. Capture by sandwiching is automatic, but you are not required to move so as to capture this way. Men are captured by sandwiching when an opposing piece moves to one end of a column or row of opposing men, and a friendly piece is at the other end. Sandwich captures at the edge of the board may wrap around corners.
 
When your Checker reaches the other end of the board, it becomes a King and can then also move and capture diagonally backwards.