Shadefern

Hitori puzzle online

Shade cells so the remaining numbers never repeat in a row or column. Keep dark cells apart and light cells connected.

Practice

Small grids, clear deductions

Eight original practice puzzles start on 3 × 3 grids and move to 4 × 4. A separate four-board daily set stays fixed for the UTC day. Each puzzle has one solution.

A hint explains one forced mark. Your marks stay in this browser, with separate progress for each practice and daily board.