How to Use the Reversi & Othello Solver Online?

1. Click any glowing circle on the board to play a move. Discs flip with 3D animation. 2. You can also click any existing piece on the board to change its color (Black -> White -> Empty). 3. Click 'Play Best Move' to let the AI execute the optimal move.

Why are Corners (A1, H1, A8, H8) so powerful in Reversi?

Corners can never be outflanked or flipped by your opponent once captured. Capturing a corner provides a permanent anchor point to secure edge discs and build an impenetrable shield of stable discs.

What are Stable Discs?

Stable discs are pieces that cannot be flipped for the remainder of the game under any circumstances. Edge pieces connected directly to an owned corner are completely stable.

Reversi & Othello Solver Online - Free AI Move Calculator

Black's Turn ⚫

Black: 2

White: 2

AI BEST MOVE

Cell C4 (+1)

⭐ Optimal move: Takes center control.

Corners: ⚫ 0/4 | ⚪ 0/4 Stable: ⚫ 0 | ⚪ 0

Flip Sounds:

💡 How to Play: Click any glowing spot to drop your piece and flip discs! Click any piece on the board to change its color.

How to Play & Use the Solver

Next Reversi Move is a free, instant AI calculator for Reversi and Othello. It calculates the strongest possible move on any board position using championship minimax algorithms.

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Corner Dominance

Moves leading to the 4 critical corners (A1, H1, A8, H8) are highlighted with golden stars.

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3D Double-Sided Flips

Discs flip smoothly with realistic 3D motion and tactile wooden piece sounds.

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Easy Piece Editing

Click any spot to play, or click any piece to change it between Black, White, and Empty.

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Permanent Territory

Discs anchored by corners that cannot be flipped back get gold anchor rings.

Why Corners (A1, H1, A8, H8) Win Games

In Reversi and Othello, the four corners (A1, H1, A8, H8) are the most valuable squares on the entire board. Because corners have no adjacent flanking lines beyond the edge, a piece placed in a corner can NEVER be flipped by the opponent for the rest of the game!

Once you take a corner, all pieces placed along the edge connected to that corner become Stable Discs that belong to you forever.

Beware of X-Squares (B2, G2, B7, G7)

The squares right next to corners diagonally—known as X-squares (B2, G2, B7, G7)—are dangerous traps. If you play into an X-square early in the game, your opponent can usually take the corner on their very next turn! Always think twice before placing a piece into an X-square.