How to play
- Goal
- Fill each row and column with the digits from 1 to the grid size exactly once, and satisfy every greater-than or less-than clue between neighbouring squares.
- How it ends
- The chart is solved when every square is filled and all row, column and comparison rules hold; there is no loss state.
- Record
- The fastest first solve of each chart is kept as a public record, with its holder's name.
- Fill each row and column with the digits from 1 to the grid size, using each digit once per line. Each printed <, >, ∧ or ∨ compares its two neighbouring squares: the narrow point faces the smaller digit. Empty gaps between squares impose no comparison.
- The worked picture shows the real Chart 081. Its bottom row has 1 < blank < 3, so only 2 belongs in the middle. Printed digits cannot be changed. Select a square and tap a digit below, or type 1–5 on a focused square; repeating a digit clears it. Notes pencil in candidates without filling the square.
- Every full chart that obeys its row, column and comparison rules completes automatically. A wrong entry can be erased or undone; there is no loss. Restart clears entries without resetting the first clock. Replays are untimed practice. Returning to the atlas in the same page keeps the first clock and public record chance; reloading an unfinished chart keeps its entries but makes its first finish local only.
Controls
| Tap / click a square, then a digit | Enter or clear a digit in the selected square |
|---|---|
| Notes | Pencil possible digits without filling the square |
| Arrow keys | Move focus through the chart |
| 1–5 / Backspace | Enter a digit or clear the focused square |
| N / Z | Toggle Notes or Undo while a square has focus |
| Restart | Clear entries and notes without resetting the first clock |
| Escape | Close a panel or return to the atlas |
All 160 original fixed charts have one independently verified answer and a no-guess deduction trace. Removing their comparison clues makes every chart ambiguous. Private witnesses do not ship. Saves use morass.futoshiki.v1; sound follows the shared site setting. No ads or analytics run inside the game.
About Futoshiki
At a lamplit scribe's worktable, fill the little measuring folios with numbers. Each brass sign points toward the smaller of its two neighbouring digits.
All 160 original charts have one independently verified answer and a no-guess deduction path. Choose any of four open shelves from the start.
Your first finish time stays in this browser. An uninterrupted first solve can claim the named public best shown on each chart card.
