Score
0
Time
90s
Best
—
Paint-by-number logic puzzle. Each number tells how many cells to fill in its own 3×3 block. Satisfy every clue to reveal the pattern. Solve as many grids as you can in 90 seconds.
Every cell holds a number from 0 to 9. That number is exactly how many cells must be filled inside the three-by-three block centred on it — counting itself and its eight neighbours (fewer at the edges and corners).
Tap a cell to fill it; tap again to mark it with an X as definitely empty; tap once more to clear it. Use the X marks to track cells you have ruled out.
A number turns red when its block already has too many filled cells, or too few cells left to ever reach it, so a red number means something nearby is wrong. The grid is solved the instant every number is satisfied.
Finish a grid to score and a new one appears at once. You have 90 seconds — solve as many as you can.
Start at the extremes, because they need no thinking. A 0 means every cell in its block stays empty, so X them all out at once; a 9 in the middle (or a clue equal to its block size at an edge) means every cell in that block is filled. These certainties ripple outward and crack open the grid for free.
Work the overlaps between neighbouring clues. Two numbers a cell apart share six cells, so the difference between their counts is fixed entirely by the cells they do not share. A high clue beside a low one forces fills on the high side and empties on the low side, often deciding cells that neither number could settle alone.
The edges and corners are your friends because their blocks are smaller — six cells along a side, only four in a corner. A clue near its small maximum there is almost solid fill, and a low edge clue is almost all empty, so sweep the border first and let it feed the interior.
Lean on the red warnings rather than guessing. Mark cells with X as soon as you are sure they are empty, not just the ones you fill; a fully X-ed and filled block confirms a number and locks its shared cells. In the timed mode, the players who go fastest are the ones who chase forced cells around the 0s and the maxes instead of staring at the ambiguous middle.