ReversiAI is a free Reversi game that runs in your browser, together with a set of guides on how the game is played and how to play it well. There is nothing to download and no account to create: open the page and the board is ready.
ReversiAI is built and maintained by T2981na Studio, a small independent studio run by one developer in Japan. The same studio publishes the Facebook Instant Games version of the game. The AI, the board engine and every guide on this site were written in-house; the guides describe how the game's own engine behaves rather than generic advice copied from elsewhere.
The seven levels are not one engine turned up and down. The lower levels pick moves with little regard for the position, so they give corners away. From the Hard level up, the engine weighs corners, stable discs, mobility and frontier discs, finishes endgames accurately, and remembers the openings it lost to, so the same trick does not work twice. The guide on beating the AI explains what each level gets wrong.
The game and the guides are free. The site is supported by advertising. Ads are never placed over the board, and the game's features are not locked behind them. Details of what advertising partners may process are in the Privacy Policy.
This site uses the name Reversi for the game throughout. Reversi is the classic 8×8 disc-flipping game; the rules used here are the ones explained on the rules page.
Questions, bug reports and suggestions are welcome at tetsuwan28go@outlook.com. Reports about a specific game position are easiest to act on with the move list or a screenshot of the board.
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