About Reversi
Classic Reversi becomes an Orenvalt moonwell: ivory sun seals, indigo moon seals, brass constellations and rippling magical captures on an archivist's observatory table.
The 120 always-open Moonwell Trials are reachable positions taken from legal games. Exact search keeps only puzzles with one winning opening against perfect resistance; the first listed move is deliberately not that answer.
Every trial has a named fastest-time Top 10 on its card and in play. Three casual computer rivals and a same-device two-player duel provide full games from the standard opening.
How to play
- Goal
- Finish with more seals of your colour than your rival.
- How it ends
- The game ends when neither side can place a seal; the side with more seals wins. A side with no legal move passes.
- Record
- Each Trial keeps the fastest first win; games against the rival keep your best margin.
- Place a sun seal so one or more moon seals lie in a straight line between the new seal and another sun. Every trapped seal turns.
- Win a Trial by finding its single winning opening and finishing ahead against the exact rival. If one side has no legal move, its turn passes automatically.
- Corners can never turn. Keeping choices open is usually stronger than taking the most seals immediately.
Controls
| Input | Action |
|---|---|
| Tap or click | Place on a glowing legal well |
| Arrow keys / WASD | Move board focus |
| Enter / Space | Place the focused seal |
| R / Escape | Restart or leave the board |
Good to know
Sound, completions and personal margins persist in this browser.
