Reversi on a 4×4×4 board. Place a disc on an empty cell to bracket your opponent's discs
in any straight line — including 3D diagonals, 26 directions in total — and the bracketed discs flip
to your color. You may only play where you flip at least one disc. Legal moves glow as
green dots. When neither side can move, the player with more discs wins.
Rotate the board with a one-finger drag, pinch to zoom, and tap a green dot to place a disc.
Use the disc-size slider at the top any time the board feels crowded.
FAQ
Q. I can't select a higher level.
A. Beat the highest unlocked level to unlock the next one, starting from LV1.
Q. My turn was skipped with a "pass" message.
A. When you have no legal move, your turn is passed under Reversi rules. Tap the screen to continue.
Q. How does difficulty work?
A. Eight levels. Higher levels search deeper (the top level solves the endgame exactly) — no artificial handicaps.
Q. How do I reset my progress?
A. There is no in-app reset yet. Deleting and reinstalling the app returns it to the initial state.
Q. Does it work offline?
A. Yes. Everything, including the AI, runs on your device with no network communication.