A Light Up–style logic puzzle: place lamps on empty cells, satisfy the numbered walls, and light every square without letting two lamps shine on each other.
📖How to Play
Place lamps on the empty cells. Numbers count lamps on the four touching sides. Beams travel horizontally and vertically until blocked — and two lamps may not shine on each other. Every empty cell must end up lit.
Read the numbered clues, deduce where lamps belong, and fill the board with light.
🎮Gameplay Mechanics
1. Tap to Cycle
- Tap a cell to cycle through three states: empty → lamp → mark (pencil) → empty.
- Use lamps for your final answer and pencil marks to note cells that cannot hold a lamp.
2. Walls and Number Clues
- Black cells are walls — they block light and cannot hold a lamp.
- Numbered walls show exactly how many lamps touch that wall on its four sides (up, down, left, and right).
- Each clue must be satisfied exactly — no more, no fewer.
3. How Light Works
- A lamp casts light in all four directions along its row and column.
- Light travels in straight lines until a wall stops the beam.
- Lamp cells count as lit themselves.
4. No Lamp Conflicts
- Two lamps may not see each other along the same row or column.
- If placing a lamp would shine directly onto another lamp, that placement is invalid.
5. Win Condition
- Every non-wall cell must be lit when the puzzle is solved.
- Lamps count as lit, and illuminated empty cells count too.
- You win when all clues are satisfied and the entire board is covered in light.
💡Tips for Success
1. Start with the Strongest Clues
- Look for numbered walls with low counts (like 0 or 1) or tight corners — they often force a lamp or rule one out immediately.
2. Use Pencil Marks Liberally
- Mark cells that would break a clue or create a lamp conflict before you commit to placing a lamp.
3. Follow the Light
- After placing a lamp, trace its beams and note which cells are now lit — those cells no longer need another lamp nearby.
4. Watch for Hidden Conflicts
- A cell that looks open may still be forbidden if a lamp there would shine onto another lamp across a clear row or column.
5. Work by Elimination
- When a numbered wall is almost satisfied, the remaining adjacent cells often reveal exactly where the last lamp must go.
Can you read every clue, place each lamp with precision, and bathe the board in light? Sharpen your deduction skills and conquer the Logic Puzzle!
🧠Design & Strategy
Logic Puzzle presents grid constraints solvable only by elimination—no guessing required on well-formed levels. Players mark impossibilities first, then collapse remaining options. It mirrors sudoku-style reasoning without number symbology, lowering entry friction.
Patience and notation discipline beat speed until patterns become automatic.
