88RInference

Make space for focused thinking with a quiet, offline number puzzle experience. Solve carefully designed 6x6 and 9x9 logic grids where every row, column, and region must contain each number once. Start with a gentle beginner chapter, then develop your reasoning through advanced and expert puzzles with richer crossing constraints. Each puzzle supports: • Clear answer entry for confident deductions • Candidate notes that never count as a completed answer • Conflict markers that help you review relationships without revealing solutions • Undo for safe experimentation • Up to three explanatory hints based on verifiable deductions • Automatic saving of answers, candidates, elapsed time, and hint history Build a personal record as you complete puzzles, improve your times, finish without hints, and maintain a local daily challenge streak. When a puzzle is complete, review your time, undo count, and hint use before moving to the next level. The first steps are explained in a short, practical guide covering row, column, region, and candidate reasoning. Preferences let you adjust motion, sound preparation, conflict markers, and assistive display. Everything is designed for private, unhurried play. No account, leaderboard, advertising, or network connection is needed. Your progress and preferences remain on your device.