Setup and opening position
Four discs occupy the center of an eight-by-eight board in the standard diagonal arrangement. You move first, the computer moves second, and every other square begins empty.
Reversi
Finish with more discs than the computer when the board is full or neither side can make a legal capture.
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How to play
Finish with more discs than the computer when the board is full or neither side can make a legal capture.
- Four discs occupy the center of an eight-by-eight board in the standard diagonal arrangement. You move first, the computer moves second, and every other square begins empty.
- Place a disc only where it brackets one or more opposing discs in a straight horizontal, vertical, or diagonal line. Every bracketed ray flips; a player with no capture must pass.
- Finish with more discs than the computer when the board is full or neither side can make a legal capture.
Strategy tips
- Protect access to corners, avoid giving away the squares immediately beside an empty corner, and value stable edge discs more highly than a large but fragile early disc count.
- Taking the move that flips the most discs now can expose a corner or remove your mobility, allowing the opponent to control several stronger turns in succession.
- Count the remaining empty squares and forced passes carefully; parity and the order of the final corner and edge moves often decide a close board.
Complete guide
Rules, scoring, and strategy
Reversi is a complete browser implementation with its own versioned rules profile. Outflank opposing discs on an eight-by-eight board, turning every bracketed line to your color before the position closes.
Legal moves and game flow
Place a disc only where it brackets one or more opposing discs in a straight horizontal, vertical, or diagonal line. Every bracketed ray flips; a player with no capture must pass.
Winning and terminal positions
Finish with more discs than the computer when the board is full or neither side can make a legal capture. Count the remaining empty squares and forced passes carefully; parity and the order of the final corner and edge moves often decide a close board.
Practical strategy
Protect access to corners, avoid giving away the squares immediately beside an empty corner, and value stable edge discs more highly than a large but fragile early disc count. Taking the move that flips the most discs now can expose a corner or remove your mobility, allowing the opponent to control several stronger turns in succession.
Questions players ask
What is the objective in Reversi?
Finish with more discs than the computer when the board is full or neither side can make a legal capture.
Which moves are legal in Reversi?
Place a disc only where it brackets one or more opposing discs in a straight horizontal, vertical, or diagonal line. Every bracketed ray flips; a player with no capture must pass.
What should I plan first in Reversi?
Protect access to corners, avoid giving away the squares immediately beside an empty corner, and value stable edge discs more highly than a large but fragile early disc count.
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