okkaystudio
Reversi lessons
Read in order (Basics → Intermediate → Advanced) and try each puzzle yourself with Try it.
Basics
Steps 1–3Flipping rules, the value of corners, and the risky X- and C-squares.
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1. Flipping Practice
2 puzzlesIn Reversi, when you trap your opponent's discs between two of your own, they flip to y...
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2. Taking Corners
2 puzzlesA disc in one of the four corners can't be trapped from any direction, so it can never ...
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3. Watch Out for X- and C-Squares
2 puzzlesThe square diagonally next to a corner is the X-square, and the edge squares right besi...
Intermediate
Steps 4–6Quiet moves, limiting your opponent's moves, and stable discs. Midgame play that cares about mobility more than disc count.
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4. Quiet Moves
2 puzzlesDiscs that touch an empty square are called frontier discs. Your opponent needs to trap...
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5. Limiting Your Opponent's Moves
2 puzzlesThe side with more available moves has the advantage (mobility). When your opponent is ...
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6. Growing Stable Discs
2 puzzlesDiscs connected without gaps from a corner along the edges can never be flipped again (...
Advanced
Steps 7–9Parity, passes, and endgame calculation. Read the endgame all the way through.
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7. Parity: Getting the Last Move
2 puzzlesLate in the game, when the empty squares split into separate regions, whoever plays las...
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8. Forcing a Pass
2 puzzlesIf your opponent has no legal moves, they pass and you get to play again. Forcing a pas...
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9. Endgame Calculation
2 puzzlesWith ten or fewer empty squares, you can calculate all the way to the end. Keep corners...