Reversi game with a strong AI engine and a nice scalable UI.
The engine plays at 6 various AI levels, from an easy one to a very advanced.
The user can play either side.

Reversi is a strategy board game for two players, played on an 8×8 board.
There are sixty-four identical game pieces called disks (often spelled "discs"), which are light on one side and dark on the other.
Players take turns placing disks on the board with their assigned color facing up.
During a play, any disks of the opponent's color that are in a straight line and bounded by the disk just placed and another disk of the current player's color are turned over to the current player's color.

The object of the game is to have the majority of disks turned to display your color when the last playable empty square is filled.

The game of Reversi was invented in 1883. A modern Mattel game, published as Othello and with a change to the board's initial setup, was patented in 1971.