Reversi - An Othello-Style Game with Friends and Five Computer Levels

Reversi Game Online with Friends

Play a free Reversi game online with room links for friends, five computer levels, and two-player games on one device. Place a black or white disc to trap a line of the other color, then watch those discs flip to yours. You win by having more discs when neither player has a legal move. You can play in a browser on a phone, tablet, or computer without installing an app.

Each game starts with four discs in the center of an 8×8 board. Early on, you might flip a single disc. Later, you can turn over several rows with one move. The current count can change quickly, so a large lead halfway through does not guarantee a win. Look for useful squares as well as large captures.

Play Reversi Online with Friends or the Computer

Create a room and share its link with a friend. You can join as a guest, unless the host has blocked guests in the room settings. One player controls Black and the other controls White. The marked squares show where the active player can move, and the score beside each player shows how many discs they currently own.

For solo practice, choose Beginner, Easy, Normal, Hard, or Expert. At Beginner, the computer makes random legal moves. At higher levels, it searches ahead more often and weighs corners, available moves, and the final disc count. Expert always uses its strongest search. Try a few games at Beginner to learn how lines flip, then raise the level when you want a tougher opponent.

You can also select two local players to take turns on the same screen. In a larger online room, extra players join the black or white team and rotate through that team's turns. The board still has only two colors. Check the active player's name before choosing a move with your teammates.

Reversi Room Settings

The rules stay the same in every room: an 8×8 board, four starting discs, and Black moving first. The host can change the time allowed per turn. The default is 30 seconds, with five extra seconds on the first turn. Choose No Timer for a slower game, or set a limit from 3 to 120 seconds for a quicker pace.

When the timer runs out, a legal move is played for you. You cannot use a timeout to pass while a move is available. The timer is turned off for solo play. The host can also set the player limit, require a minimum Reversi level, or block guest accounts. These settings control who can join and how fast the game moves, without changing which placements are legal.

How to Play Reversi

Black moves first. Click or tap a marked empty square to place one disc. Your new disc must trap at least one opposing disc in a straight line between itself and a disc you already own. The line can run across, down, or diagonally. There must be no empty square between its two ends.

Every opposing disc trapped by that placement flips to your color. If the new disc traps lines in several directions, all those lines flip in the same move. You cannot choose to leave one unchanged. However, a disc that has just flipped does not start a new capture around a corner. Each line must lead straight from the disc you placed.

You must move when you have a legal placement. If you have none, your turn passes automatically and the other color moves again. Sometimes the same color gets several turns in a row. When neither color can move, the game ends, even if some squares are empty. Count only the discs on the board. The color with more discs wins, and equal counts mean a draw.

These placement, pass, and scoring rules follow the standard described in the World Othello Federation's official rules. You do not need to count captures by hand in Foony. The discs flip and the scores update when a legal move is played.

Reversi Strategy for Beginners

• Take a corner when it helps. A corner disc cannot be trapped between two opposing discs, so it will stay your color. Before playing next to an empty corner, check whether your opponent could use that move to claim the corner.
• Count your opponent's next moves. A move that flips many discs can also give your opponent several useful replies. Compare it with a smaller capture that leaves them fewer choices. Try to keep at least one safe move available for yourself.
• Treat the early score as temporary. Discs in the middle can change color several times. Giving up a few now can be useful if you gain a corner or avoid leaving a weak edge. The final count decides the winner.
• Count carefully near the end. With only a few empty squares left, look at every legal move. Check whether either color will have to pass. A forced pass can let you make two placements in succession and change the final result.

Reversi Leaderboards, Achievements, and Pieces

Compare your results on the Reversi leaderboards and track three Reversi achievements. First Flip is awarded for finishing a game. Four Corners requires a board win with all four corners showing your color. For Overwhelming Win, finish with at least 52 of the 64 discs showing your color. A win because the other player leaves does not count toward those two board challenges.

The Reversi pieces use the same board surfaces and stone sets as Foony Go. Your available Go equipment can be used in both games. These changes affect how the board and discs look, while the square positions and legal moves stay the same. Finished games also contribute to account and game progress, with solo rewards scaled to the chosen computer level.

Reversi, Othello, and Go

People often use Reversi and Othello for this disc-flipping game. Foony uses the familiar fixed four-disc opening and mandatory-pass rules described above. Othello is a trademark of MegaHouse, and Foony Reversi is an independent game with no affiliation or endorsement.

Although both use black and white pieces, Reversi and Go have different goals. In Reversi, you place discs inside squares and flip opposing lines. In Go, you place stones on intersections and capture groups by filling their adjacent empty points. If you already play Go, the first habit to change is where you click: aim for the center of a square on the Reversi board.