Sit & Solve® Tic-Tac-Doku™ (Sit & Solve® Series)

Give your traditional sudoku solving a shot of extra fun! Tic-Tac-Doku is a variant that's played with Xs and Os and based on tic-tac-toe rules. Fans of logic puzzles will find this twist on two classic formats simply irresistible. Choose from easy, medium, and hard challenges.