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Free logic puzzles, every 4 hours

Sudoku, Killer Sudoku, Binary Puzzle, Futoshiki, Kakuro, and Codebreaker. One solution. No ads.

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Binary Puzzle

6×6–14×14

Equal zeros and ones. No three in a line.

Killer Sudoku

9×9

Cages and sums. Same grid, a different kind of force.

Futoshiki

4×4–6×6

Place 1–N once in every row and column, while respecting the inequalities.

Kakuro

7×7–8×8

Sums across and down. Fill the whites, leave the blacks.

Codebreaker

3–7 digits

Break the secret code. Exact and misplaced digits.

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