Reversi Challenger

Reversi Challenger — the classic board game Reversi (also known as Othello), reimagined for players who want to truly improve.

Whether you're picking up your first disc or chasing a black-belt rank, Reversi Challenger grows with you. Face 26 finely-tuned AI levels, battle real opponents online, and review every game move-by-move to sharpen your strategy.

■ 26 AI difficulty levels
From absolute beginner (20 kyu) all the way up to 6 dan, the AI adapts to your skill. Each step is carefully balanced, so there's always a meaningful next challenge as you grow stronger.

■ Four ways to play
All four game modes — including online and friend matches — are free to play.

Play vs AI — train against 26 difficulty levels
Online Match — get paired with a random opponent worldwide
Local 2-Player — pass-and-play on a single device
Friend Match — invite a friend and play privately

■ Ranked play & ratings
Climb the ranks with a rating system built for Reversi (Othello). Your rating moves faster when you're on a winning streak or beating stronger opponents, so progress feels rewarding at every level.

■ Deep game analysis
Review any finished game move-by-move. See which moves were strong and which were mistakes, jump straight to the turning points, and learn exactly where the game was won or lost.

■ Explore & study
Replay your games, study opening theory, and experiment on the board to see how the game could have gone. Perfect for players who want to study, not just play.

■ Save your games
Every match can be saved automatically so you can revisit your best (and worst) games anytime.

■ Play your way

Clean, modern design in navy & mint
English and Japanese supported
Play offline against AI, or online with friends

Optional in-app purchases unlock premium study tools, but every core mode is free to play.

Reversi. Othello. Whatever you call it — if you want to play, improve, and truly master the game, Reversi Challenger is built for you.

Download now and start climbing the ranks!