How to Play Reversi

Overview

Reversi is a board game where you capture your opponent's discs by bracketing them. When the match ends, the player with more discs wins.

Core Rules

• You play Black, the CPU plays White. Black moves first.
• You can place a disc only on squares that flip at least one opponent disc.
• Bracketing works horizontally, vertically, and diagonally.
• All bracketed opponent discs are flipped immediately.
• If a side has no legal move, it passes automatically.
• The game ends when neither side can move.

Controls

• Click any highlighted square on the board to place your disc.
• Use "CPU Difficulty" to choose Level 1 to Level 16.
• Press "New Game" to restart at the current level.

Difficulty

Higher levels use stronger evaluation and deeper search. Level 16 is the strongest CPU in this build.

Saved Records

Wins, losses, draws, and best margin are saved in browser localStorage. Your record remains available when you reopen the page in the same browser.