How to Play

• Objective: A complete set of dominoes has been placed on the grid and their values recorded — your job is to find where each domino was placed.
• Basic Rules: Every domino from (0|0) through (N|N) appears exactly once. Each domino covers exactly two adjacent cells (horizontally or vertically).
• Placing Dominoes: Click one cell, then click an adjacent cell to mark those two cells as a domino. The domino tracker on the right shows which ones you've placed.
• Removing Dominoes: Click any cell that is already part of a placed domino to remove it.
• Conflicts: If you place the same domino type twice, both placements are highlighted in red — that's a contradiction.
• Strategy Tips: Look for number pairs that only appear adjacent to each other in one location — those are forced placements. Use the tracker to mark off found dominoes.
• Help Features: Use Hint to reveal one domino, Reset to start over, or Solution to animate all placements.