Slant Lines
Fill every square with a slash so each corner number touches exactly that many lines, without ever closing a loop.
Play nowHow to play
Controls
TapKeyboard←→↑↓ Space- Tap a square to turn its line.
- Corner numbers count touching lines.
- Never close a loop.
- Keys: arrows and Space.
About the game
Slant Lines is a calm logic puzzle, also known as Gokigen Naname. Every square on the board needs one diagonal line, a slash or a backslash. The numbers sit on the corners and tell you how many lines touch that corner. One more rule keeps it tricky: the lines may never close a loop.
Thirty-six boards grow from five by five to nine by nine, and each has a single answer you can reach by reasoning alone. The moment your lines close a loop, the whole loop glows red, and corner numbers turn green when they are met. Undo is unlimited, and the hint fills one square and highlights the corners that prove it.
Free to play in your browser. No download, no sign-up. Works on phones, tablets and computers. Your progress is saved on this device.