ColorMine: Gem Logic

Please note: the game interface, tutorial and hint explanations are currently in Simplified Chinese. One gem in every row. One in every column. One in every color region. Gems cannot touch, even diagonally. Use these simple rules to uncover a whole board of hidden gems. LEARN TO SEE THE NEXT MOVE An interactive tutorial introduces the controls and deduction techniques. Tap to add or erase an X, drag to mark several cells, and double-tap to uncover a gem. Follow the clues, rule out impossible positions and discover why a cell must be correct. PRACTICE YOUR WAY Choose a square board from 4×4 to 12×12 and an available difficulty. Explore four reasoning profiles: Basic Reveal, Reveal, Advanced Reveal and Branch puzzles. Each puzzle has one solution; tougher profiles call for deeper deductions. Practice with one, two or three lives, use hints when you need them, and retry a puzzle at any time. Optional textures help distinguish color regions. FIVE PUZZLES. ONE PERSONAL BEST. Choose Easy, Normal, Advanced or Hell and tackle five randomly selected puzzles. Easy, Normal and Advanced give you two lives at the start of each puzzle. Hell gives you one. Running out of lives on any puzzle ends the challenge. Finish all five without hints to enter that tier's Game Center leaderboard. Your score is the combined active solving time, with waiting between puzzles excluded. Pausing, returning to the lobby or home screen, or moving the app to the background hides the board and stops the clock; resume explicitly when you are ready. Leave preserves the run while the app remains open; confirming Quit discards it. Each leaderboard keeps your fastest completed time. Try again whenever you like, and compare with global players or Game Center friends. Without Game Center, you can try the challenge without posting a score. TRY EVERY AVAILABLE DIFFICULTY One fixed puzzle is free in every available combination of board size, reasoning profile and difficulty. Replay those puzzles as often as you like. A single optional, non-consumable in-app purchase unlocks the full practice library and random puzzle selection within each group. Purchases can be restored using the same Apple Account. No ads. No subscription. No lives for sale. Game Center rankings and Apple purchase services require a network connection. Confirming a hint during a challenge turns that entire run into unranked practice.