Number Thread

🧵

1️⃣

🔢

➰

Number Thread

🧵 One thread through every square — pass the numbers in order!

Squares

0/25

Time

0:00

Puzzle

1/30

🧵 A path that visits every square exactly once is called a Hamiltonian path — after the mathematician William Rowan Hamilton, who turned the idea into a board game, the Icosian Game, in 1856.

⚙️ Settings

🎚️ Choose a difficulty

Bigger grids, with the numbers spread further apart. Every puzzle has exactly one thread that works.

💡 Glow the next number to reach

🔊 Sound effects

📖 How to Play

🧵 Number Thread

🎯Goal: Draw one thread that passes through every square exactly once.

👆How to play: Start on 1 and drag up, down, left or right — no diagonals. Pass the numbers in order: 1, 2, 3… Drag back along the thread to rub it out, or use the arrow keys.

🏆Win: Every square is covered and the thread ends on the highest number. Fewer hints, more stars!

🧵

All threaded!

⭐⭐⭐

Amazing!