Welcome to Chess Doku – Su Doku with chess pieces instead of numbers! Try our puzzle samples for free and if you like it then take advantage of our low-cost subscription to 100’s of different puzzles. Select your preferred puzzle type below and click the Start button to set the clock ticking. To solve the puzzle each row vertically and horizontally and each box must contain one and only one of each piece. Top our leaderboards by succesfully completing puzzles in the fastest time for the chance to win prizes.