How to play
- Goal
- Place one balloon and one iron ball in each chamber.
- How it ends
- A chart is won when every chamber has its pair and every balloon floats and every iron ball rests according to the whole-board gravity rules; a chart cannot be lost.
- Record
- Your first solve time for each chart is kept locally and may enter that chart's public fastest-time board.
- Tap an open square to cycle empty, balloon, iron ball, empty. Each outlined chamber needs exactly one balloon and one iron ball. A balloon must touch the board top, a stone, or another balloon immediately above. An iron ball must touch the board bottom, a stone, or another iron ball immediately below. Chamber lines do not block support.
- The worked picture uses real Chart 001: a balloon at the top right supports a second balloon directly below it even though a room border lies between them. A fine inner outline marks the active square; amber glow marks a piece waiting for support; rose tint marks a chamber with too many pieces of one kind.
- A chart completes automatically when each chamber has its pair and every placed piece has support. Empty squares need no X. Undo and Restart let you revise without losing. The first clock starts when the chart opens and never pauses. Replays are untimed practice; a reloaded unfinished chart remains local-only.
Controls
| Tap / click a square | Cycle empty, balloon, iron ball, empty |
|---|---|
| Arrow keys | Move focus through the chart |
| B / 1 | Place a balloon in the focused square |
| I / 2 | Place an iron ball in the focused square |
| Space / Backspace | Cycle or clear the focused square |
| Undo / Restart | Revise the chart without resetting its 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. Private witnesses do not ship. Saves use morass.dosun-fuwari.v1; sound follows the shared site setting. No ads or analytics run inside the game.
About Dosun-Fuwari
In an Orenvalt observatory, set a pale balloon and a dark iron ball in every outlined chamber. Balloons rise and iron balls sink; their vertical support can cross chamber borders.
All 160 original charts have one independently verified answer and a no-guess deduction path. Empty cells need no extra mark.
Your first finish time stays in this browser. An uninterrupted first solve can claim the named public best shown on each chart card.
