Reversi Strategy: Discerning AI Habits to Quietly Improve

Playing against AI on your smartphone screen in Reversi strategy feels vastly different as your opponent's rank rises. Under the exact same rules, you might win easily at one rank, yet suddenly hit a wall at the next. Much of that difference comes from the opponent's playing habits.

In this article, we break down AI habits rank by rank in an "opponent plays this way, so we counter that way" format, showing how to adjust your approach. Once you understand their habits, why you lost becomes clear. We introduce each rank's habits following the descriptions on the opponent selection screen.

Novice and Skilled Differ in Facing the Corner

In this board diagram position, Black has 5 playable squares: c3 to c6 marked with dots, plus c7 just below. c5 is one such candidate. In the opening phase, rather than rushing to decide which move is universally correct, setting your plan to match the opponent's rank leads to victory.

Novice opponents do not yet grasp the value of corners. Make seizing corners your top priority; it is ideal practice for spreading discs from captured corners along edges to build discs that never flip.

At the Skilled rank, opponents aim for corners themselves and avoid placing too many discs on edges. Furthermore, they pounce on your oversights. Opportunities to take corners decrease compared to Novice, so now strictly avoid diagonal neighbors to corners (b2, g2, b7, g7). Just checking "does this move give the opponent a corner square?" before playing will drastically cut missed chances.

Play in the app

Small dots appear on playable squares, letting you play from your first game while learning the rules.

Master Pressures with Mobility

In this position, if Black plays c4, White has 6 playable squares next. Playing c2 or c6 also leaves 6 squares, so c4 is not the only answer. However, playing e3 marked with a dot increases White's squares to 7. In real play it is White's turn next, but if Black could play consecutively after c4, Black would have 9 squares. It is a move that suppresses opponent mobility while preserving your own.

Master opponents count mutual mobility before playing. If you flip too many discs in the opening phase, opponent mobility blooms and puts you in trouble—a pressure strongly felt from this rank upward. The counter is using the same yardstick: narrow your candidates to 2 or 3, then count opponent squares and your squares after each. Making a habit of counting when unsure prevents being overwhelmed by Master.

Build an Advantage in the Midgame Against Edo Best and Peerless

Edo Best opponents read the endgame completely. Aiming for a comeback once in the endgame rarely works. In fact, without building a gap during the midgame, a slight lead can still be overturned at the very end. The counter is shifting the focal point to the midgame: secure stable discs on corners and edges during the midgame, establishing a lead in both disc count and mobility before entering the endgame.

Peerless opponents leave no openings. You must play determined not to give away corners or edges. At this rank, rather than tallying wins and losses each game, reviewing where you yielded corners or edges is the shortcut to improvement. Check the turning points of losses one by one so you do not concede the same shape. Since 1 move matters greatly against strong foes, keep your first few moves consistent in the opening phase and review only where differences arose to reduce review effort.

Tailor Your Play to the Rank

In summary, step up your play: practice corner capture against Novice, defend diagonal corner neighbors against Skilled, count mobility against Master, pull ahead in the midgame against Edo Best, and play with utmost caution regarding corners and edges against Peerless. The 5 ranks in Legends are arranged perfectly for practicing in this sequence.

For choosing opponent rank and basic methods to restrict playable squares, see Reversi Difficulty and Choosing Opponents.

Play in the app

Tour famous Edo sights and face 50 players in the Reversi app Legends. The AI thinks entirely on your device, letting you play to the end even without a signal.