Sudoku: Mystery Club

Sudoku: Mystery Club is a free logic game for one player or a team of up to four. Solve classic 9×9 Sudoku in your browser, uncover clues and compare witness statements. No bots are added: enjoy a quiet solo case or invite friends with a room code.

Solve Sudoku. Uncover a mystery.

How to solve a case

Choose a case and difficulty. Correct numbers are saved to the shared grid; private notes help you reason, and hints explain one step. Finishing the grid is just the beginning of your conclusion: connect the clues into a supported theory. New cases unlock as you progress.