Sudoku, Nonogram, no-guess Minesweeper and three more. Every level has a single solution and yields to pure deduction — none of them asks you to guess.
Play now4x4 to warm up, 9x9 for real. Difficulty is measured by the technique a level requires, not by how many cells are empty.
A Latin square with cages of sums, differences, products and quotients. Arithmetic and deduction together.
Paint the cells following the number clues of each row and column until the grid is complete.
Only 0 and 1, three rules, a two-minute game. One of the games of the against-the-clock mode.
Four to six numbers, four operations and a target. Hit it exactly, using each number once.
Every board is checked by a solver before it reaches you: every mine can be deduced, from start to finish.
Six daily puzzles, the same for the whole world. Share your result without giving the answer away.
The standings reset every Monday. Whoever joins today still competes for this week's podium.
Race friends on the same level, or share one board in co-op. Just send the room code.