Insert coin
Six digits, six rows, six columns, six boxes. Each digit lands once in every one of them. Fill the grid to clear the stage.
No digit repeats inside a row, a column or a box — and every board has exactly one answer, so you never have to guess. Tap a square, then a digit. Turn Notes on to pencil in the possibilities instead.
100 stages. The first six are 4×4 warm-ups; the rest are the 6×6 board, and the clues thin out as you climb.
Stage 01
Hint-free clears in a row.