🎯 Objective

Have the most discs of your colour when the board is full — or when neither player can move. You play Black ⚫, the AI plays White ⬜. Black goes first.

🕹 How to Play

• Tap a green dot to place your disc there
• A move is only valid if it traps at least one opponent disc between your new disc and another of yours — in a straight line (horizontal, vertical, or diagonal)
• All trapped opponent discs flip to your colour
• If you have no legal moves, your turn is skipped
• If neither player can move, the game ends immediately

🏆 Winning

Count up all discs when the board fills up (or no moves remain). The player with more discs wins. In Ultimate Reversi, positions can swing dramatically — you can go from 4 to 40 discs in just a few moves!

💡 Strategy Tips

• Corners are king — a disc in a corner can never be flipped. Race for them
• Avoid the X-squares — the 4 diagonal squares adjacent to corners give your opponent a path to the corner
• Fewer discs early is good — fewer discs means fewer moves for your opponent to outmanoeuvre you
• Mobility matters — limiting your opponent's move count is often more valuable than flipping more discs

🎚 Difficulty

Controls how deep the AI searches and how well it weights positions:

BeginnerEasyMedium HardVery HardScientistCyborg ☠

⭐ Daily Challenge

Every day a seeded AI strategy is generated — same for all players worldwide. Beat it to lock in your daily!