Reversi
Flip your opponent's discs to dominate the board.
↑ This is Reversi running right here in your browser — no download needed.
About the game
Reversi, also called Othello, is a two-player disc game. Place a disc to flank a line of your opponent's discs, flipping them to your color. Most discs at the end wins.
How to play
Place a disc so it traps a straight line of opponent discs between your new and an existing disc; those flip to your color. The game ends when the board fills.
Tips & strategy
['Corners are permanent - capture them whenever possible.', "Avoid placing next to a corner you don't control.", 'Count disc parity late game to secure a win.']
Advanced guide
Reversi strategy hinges on board control. Fight for corners and avoid 'X-squares' adjacent to empty corners, which hand your opponent the corner next turn. Early on, prioritize mobility - having more legal moves - over a large disc lead.
History & origins
Reversi's modern rules were standardized in the 1970s and it became a worldwide competitive mind sport.
Frequently Asked Questions
Why are corners so valuable?
A corner disc can never be flipped back, anchoring a region.
Should I maximize discs early?
No - mobility and corners matter more than a big early lead.
What is a 'stable' disc?
One that can never be flipped, like a corner.
How does the game end?
When neither player can move; most discs wins.
Can the leader lose?
Yes, a late corner capture can swing the count.
Is there a winning opening?
The standard diagonal opening is a strong, balanced start.
Where can I play Reversi for free?
Right on this page — Reversi is embedded above, free, legal, and with no download or sign-up. Play with your keyboard on desktop or touch controls on mobile. Your best score is saved in your browser, so it's still there next time. Every game here is original or open-source, with links that stay valid.