About Hitori
Shade repeated numbers so no row or column contains duplicates. Shaded cells cannot share an edge, and all unshaded cells must remain connected.
How to play
- Goal
- Sink stones until no number stands twice in a row or column.
- How it ends
- A crossing is solved when no number repeats, no two sunk stones touch and every standing stone is joined in one causeway. There is no way to lose.
- Record
- The fastest first solve of each crossing, with its holder's name.
- Tap a stone to cycle standing, sunk, warded — a ward is your own mark for a stone that must stand; drag to ward a run of stones.
- Sink stones until no number stands twice in any row or column. Two sunk stones may never touch side by side.
- Every standing stone must join one causeway, reachable from every other by steps up, down, left or right.
Controls
| Input | Action |
|---|---|
| Tap / click | Cycle a stone: standing, sunk, warded |
| Right click | Cycle the other way |
| Drag | Ward a run of stones in one mark |
| Arrow keys | Move between stones |
| X / O / Delete | Sink, ward, or clear the focused stone |
| Z / R / Escape | Undo, restart, or return to the chart |
Good to know
All 120 crossings are open, deterministic, proved to need no guess and independently counted to one answer. No hints or mistake checks are available. Named fastest times, completion, kept attempts, sound and reduced-motion preference persist in this browser.
