Solve a Puzzle & Win PRIZES! Checkmate in One Checkmate in Two Checkmate in Three CHESS PUZZLES WEEKLY PRIZES Below are the prizes we send out! Enter as often as you like. Winners posted weekly! Click on prize to learn more about it. Checkmate in One Prize Chess Rules for Students Workbook An instructional workbook designed for students learning the game of chess. Click here to learn more! Checkmate in Two Prize Checkmate Ideas For Students An instructional workbook containing tactics in worksheet format used to checkmate--like Pins, Sacrifices, Removing the Guard, Attraction, Clearance, and Attacking Flight Squares! Checkmate in Three Prize Chess Tactics For Students An instructional workbook containing 434 carefully selected problems presented in workbook format. View this week's Winners!