How to play
- Goal
- Draw one loop through every pearl, with a straight passage through each ivory pearl and a turn through each onyx pearl.
- How it ends
- A chart is won when that single loop obeys both pearl rules; there is no loss.
- Record
- The fastest unaided first solve of each chart is kept locally and may enter its public record.
- Join neighboring settings to make one closed loop through every pearl. The loop may not branch or cross. An ivory pearl must pass straight, and the line must turn in at least one neighboring setting on its path. An onyx pearl must turn, and the line must go straight through both neighboring settings on its path.
- The worked picture uses real Chart 001: the ivory pearl on the left edge runs vertically; the onyx pearl immediately below turns right, with straight settings on both arms. Tap one setting and then a neighbor to join them, or drag across neighboring settings. Tap a joined pair again to lift its thread.
- A chart completes automatically when one loop obeys every visible pearl rule. An incomplete or illegal loop simply stays open; there is no loss. Undo reverses the last line, and Restart clears lines without resetting the first clock. Replays are untimed practice; returning through the atlas keeps the first clock, while reloading unfinished progress makes its first solve local only.
Controls
| Tap / click adjacent settings | Join or lift the segment between them |
|---|---|
| Drag across settings | Lay a thread along neighboring settings |
| Arrow keys | Move focus around the chart |
| Shift + arrow | Draw or lift the traversed segment |
| Enter / Space | Select a focused setting |
| Undo / Z | Restore the previous thread |
| Restart | Lift every thread without resetting the first clock |
| Escape | Close a panel or return to the atlas |
All 160 fixed charts have one independently verified answer and a separate bounded deduction trace. The chart bank and private witnesses are checked at build time; witnesses do not ship. Saves use morass.masyu.v1; sound follows the shared arcade setting. No ads or analytics run inside the game.
About Masyu
In an Orenvalt moon-jeweler’s workshop, trace one silver loop through a tray of ivory and onyx pearls. Ivory stays straight, while onyx turns.
The 160 original charts each have one independently verified loop. A separate trace solves every chart through forced local patterns and one-step contradictions, without trying ink on the board.
Your first finish time stays in this browser. An uninterrupted first solve can claim the named public best for that chart.
