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Reversi, also known as Othello, is a game where players take turns placing discs on the board and flipping their opponent's discs by trapping them between two of their own.
This site uses the following general rules of Reversi.
On this site, valid moves are displayed as hints for easier gameplay. You can also turn off this feature inย .
A free Reversi (Othello) game that you can play instantly on the web. It features AI matches, online matches, and a simple digital board mode for playing face-to-face.
The Reversi AI difficulty levels range from beginner-friendly to the strongest in the world.
The most popular Intermediate AI generally looks one move ahead, while the higher-level AIs read more than eight moves ahead to find better moves. At the top levels, you can play โ for free โ against the web version of Egaroucid, one of the world's strongest Reversi AIs, which reads more than 20 moves ahead.
Over 2 million matches have been played in this AI match mode. The higher the AI level, the smaller the share of players who can beat it: in the hidden '๐ Legend AI', which only the top ~3.5% of players can even challenge, the win rate is only around 16%.
Previously, Reversi Web was hosted on a page of Keio University SFC's website, but we have now migrated to the new URL (reversi.yuki-lab.com). We look forward to your continued support of Reversi Web.
This article, written by the developer of this site, Reversi Web, offers free strategies for intermediate and advanced Reversi players.
You can import game records from the clipboard to continue matches or analysis.
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