Counting Discs and Deciding Wins in Reversi

Looking at the black and white discs on the board, beginners often wonder who is ahead or when the contest ends. For those starting this board game, let us unpack Reversi count discs win clearly. Once you understand the basic principles, reading the board becomes straightforward.

Basics of Outflanking Discs and Passing When Unable to Move

This diagram illustrates the board right after Black played f5 as the first move, followed by White playing d6. On Black's turn, Black can play on any of the candidate squares: c3, c4, c5, c6, or c7. To place a disc, Black must outflank the opponent's white discs in a straight line with black discs and flip 1 or more of them. An essential rule of this game is that you cannot play on an empty square where no disc can be outflanked.

As the game continues, a situation may occur where no square allows you to outflank the opponent's discs. When you have no legal move anywhere, you must pass, skipping your turn and handing play to your opponent. Passing is not a choice you can make freely; it occurs strictly when you have no legal moves. If there is even 1 spot where you can outflank and flip, you must play there, no matter how unfavorable that move appears.

Play in the app

Small markers highlight valid squares, letting you play from your very first match while learning the rules naturally.

Ending the Game and Counting Discs

This diagram shows a game progressing through Black f5, White d6, Black c5, White f4, Black e3, White f6, Black g5, White e6, and Black e7. In just 9 moves, all white discs were flipped to Black, leaving neither side with a legal move, so the match finishes with 51 empty squares remaining. The count is 13 black discs and 0 white discs, resulting in a win for Black. A game normally concludes when all 64 squares are filled or when neither player can outflank any disc.

To decide victory or defeat, simply tally the discs remaining on the board. The counting process is very direct, with no special calculations or deductions. At the end, count the black and white discs on the board; the player with even 1 more disc of their color wins. If both sides have the same count (32 discs each on a full board), the result is a draw. Even if the advantage swings drastically during the match, only the final disc count determines the outcome.

Furthermore, even if empty squares still remain on the board, if one player's discs are completely wiped out, the game ends at that moment. The wiped-out side has no way to outflank, and the remaining side wins. Likewise, if neither side can outflank, play ends without filling the remaining empty squares, and the winner is determined by the discs on the board. In the counting method explained here, leftover empty squares are not awarded to either side. In tournament play, rules sometimes add remaining empty squares to the winner's total, so checking local rules beforehand is wise.

• When the board is completely filled: Once all 64 squares are filled, the game concludes, and the player with more discs on the board wins.
• When one side is wiped out: The moment a player's discs are completely gone, the contest ends, and the player with discs remaining wins.
• When neither player has a move: Even if empty squares remain, play ends when neither can move, and the winner is decided by counting discs.
• When disc counts are equal: If both black and white discs have the exact same total (32 to 32 on a full board), the match is declared a draw.

Key Concepts for Beginners to Secure Victory

Beginners often want to capture many discs from the opening phase and cover the board in their color. However, capturing too many discs during the opening phase or midgame leaves many vulnerable discs on the board, which actually reduces your own mobility. The key is to flip discs sparingly in the opening phase while preparing to aim for stable squares such as the four corners.

The four corners (a1, h1, a8, h8) are secure points where placed discs can never be outflanked by the opponent. Once you secure a corner, you can use it as a foundation to solidify outer edges in your color. Conversely, carelessly playing next to a corner gives your opponent an opportunity to take it, so deliberate play is crucial.

Additionally, forming a habit of counting how many moves you have available on your turn makes it easier to grasp game momentum. Keeping high mobility allows you to force passes from your opponent. Avoid greed in the opening phase, preserve choices, and aim to expand discs rapidly heading into the endgame.

If you wish to test your skills conveniently on a smartphone, launching the Reversi app Legends is an excellent way to practice board fundamentals. Move markers let you calmly examine each board position step by step.

Play in the app

Journey through Edo landmarks and play against 50 opponents in the Reversi app Legends. The AI runs locally, allowing full matches anywhere without mobile service.