Retro Reversi (Othello) game

iReversi is a quiet, unhurried game of Reversi. Play the AI, or share one board with a friend. The AI genuinely searches: six moves ahead with alpha-beta pruning, eighing corners, mobility and frontier discs the way a club player does, and solving the last ten squares exactly. It takes any corner you leave open, and it is not tempted by a big early capture. Tap an empty square to play, and the discs you trap turn over one by one. Hints mark every legal move, a fresh backdrop arrives with each new game, and the score reads out in seven-segment digits. Every game against the AI goes on your record — games won, win rate, and five medals to collect, from a first win to weeping every disc off the board. Your wins are sent to a Google Play Games leaderboard, so they stand against everyone else's.