Reversi: Strong AI Offline

Reversi on a clean, high-contrast board. Place a disc so that a line of your opponent's discs sits between it and one of your own, and that whole line flips to your colour. Corners can never be taken back, edges are worth fighting for, and one quiet move can turn the board around. This Reversi plays offline, needs no account and saves your game whenever you leave. A STRONG AI, THREE LEVELS • Easy is relaxed: a good way to learn how lines are trapped • Normal looks a few moves ahead and keeps the game even • Hard searches deep, knows the classic openings and works out the final moves of every game exactly The levels differ only in how far ahead the AI looks. It never adapts to your results, and it plays by the same rules as you, with no hidden information. SEE BEFORE YOU PLAY • Dots show every square you can play (switch them off in Settings) • Hold a finger on a square to preview exactly which discs would flip, without playing it (Easy, Normal and two-player games) • Tap a square that can't be played and the board tells you why • Both disc counts stay at the top of the screen • Undo takes back your last move together with the AI's reply • Stuck? The Hint button marks the square the Hard AI would choose, three times in every game LEARN FROM EVERY GAME After a game, open the review and step through it move by move. Wherever the Hard AI would have played elsewhere, its square is ringed in gold, and every move gets a short verdict: best move, good move, inaccuracy, mistake or blunder. An evaluation graph shows how the game swung; tap it to jump to any position. The move list records the whole game in a1–h8 notation. YOUR GAME, YOUR RULES • Board sizes: quick 6×6, classic 8×8 or long 10×10 • Handicap games: Black receives one to four corners before the start and White moves first • Scoring: discs only, or tournament scoring where the empty squares go to the winner • Two players can take turns on the same device • Green, wood or dark board, coordinates on or off, three game speeds and a reduced-motion option ALSO INSIDE • Statistics for each level and board size: wins, losses and draws, average margin and perfect wins • Optional weekly ranking of wins against Normal and Hard (needs an internet connection) • The rules explained step by step, with diagrams from real positions • 12 languages

Welcome to Reversi: Strong AI Offline! • Play the AI on Easy, Normal or Hard — Hard calculates the end of every game exactly • Dots show where you can play; hold a square to preview the discs that would flip (Easy, Normal, two players) • Hint, Undo and a move-by-move Review with an evaluation graph • 6×6, 8×8 and 10×10 boards, and two players on one device • Statistics for each level and board size; play without internet