How to play Numbrix

Connect every number in order with a continuous edge-sharing path.

Numbrix is a number-path logic puzzle. You receive an n×n grid with some cells already filled. Complete the grid with every integer from 1 through n² exactly once so that each consecutive pair (1–2, 2–3, …) sits in cells that share a side—not merely a corner.

Goal

Fill every empty cell so the board contains 1 … n² exactly once and forms a single orthogonal path: consecutive numbers touch by an edge. Clue cells never change.

Controls

Click or tap an empty cell, then type a number (or use the on-screen keypad on phones). Arrow keys move between cells. Clue cells are locked.

When the grid looks complete, tap Check grid. The server verifies that every number appears once and that consecutive values are neighbors.

Difficulty

Easy is 4×4 (path to 16), Medium 5×5, Hard 6×6, Expert 7×7. Larger grids keep fewer clues, so the path has more freedom—and more chances to paint yourself into a corner.