Gappy is a logic puzzle where you fill a grid with numbers 1 to N. Each row and column contains each number exactly once, and identical numbers cannot touch each other - not even diagonally.

How many levels does Gappy have?

Gappy features 30 unique-solution levels across 5 difficulty tiers, from 5x5 Beginner grids to 8x8 Expert puzzles.

Is Gappy free to play?

Yes! Gappy is completely free to play in your browser. No download or registration required.

Gappy - Free Online Diagonal Latin Square Puzzle

Select Level

How to Play

Rules

Fill each cell with a number from 1 to N
Each row must contain every number exactly once
Each column must contain every number exactly once
Same numbers CANNOT touch - not even diagonally!

Tap a cell, then tap a number. Use the X button to erase.

Conflicts are shown in red. Solve all cells to win!

Gappy - Diagonal Latin Square Logic Puzzle

Gappy

Select Level

How to Play

Rules

Settings

Puzzle Solved!

All Levels Complete!