NN666Sentinel

Read the clues, mark safe deductions, and uncover each field in a calm, single-player logic game designed for short sessions. Every field begins with a safe first reveal. Numbers count nearby hazards, empty ground expands automatically, and each generated layout is checked for a deterministic solution before play. If a layout cannot be prepared for your opening, choose another tile. Choose from three field sizes: • Beginner: 9 × 9 with 10 hazards • Intermediate: 12 × 12 with 24 hazards • Advanced: 16 × 16 with 40 hazards Explore 60 fixed puzzles across three chapters, play a locally generated daily field, or start another random field. Later chapters introduce an irregular playable area and a guaranteed-safe perimeter. Use tap or long-press marking, optional question markers, a visible marker counter, and undo for your latest marker action. Pause the timer, restart with confirmation, or inspect a failed field with the triggered tile, related clues, and incorrect markers highlighted. Reveals cannot be undone. An interactive field guide introduces revealing, marking, clearing a marker, and comparing clues. Fastest completion times, completed levels, win totals, and a completion calendar help you track progress. Preferences include light and dark palettes, motion, tile sounds, and assist outlines. Play offline without an account, advertising, purchases, online leaderboard, or network connection. Active fields, preferences, and records remain on this device.