Kropki Dots
Fill the grid so every row and column has each number once. White dots join neighbours one apart, black dots join a number and its double, and no dot means neither. Thirty puzzles from 4x4 to 7x7.
Play nowHow to play
Controls
Tap- Tap a cell, then a number.
- Tap the same number to erase.
- White dot: numbers differ by 1.
- Black dot: one is double.
- No dot: neither.
About the game
Kropki Dots is a Latin square puzzle where the borders talk. Every row and every column holds the numbers 1 to n exactly once, like a small sudoku without boxes. Between some neighbouring cells sit dots. A white dot means the two numbers are one apart, like 3 and 4. A black dot means one is double the other, like 2 and 4. And wherever two cells touch with no dot at all, they're neither.
That last rule is what makes it click, because empty borders carry as much information as dots. Most puzzles start with almost no numbers, so everything comes from the dots. The twist is live feedback: each dot pulses green once its pair is right and flashes red when it breaks. Thirty puzzles run from 4x4 to 7x7, each with one answer.
Free to play in your browser. No download, no sign-up. Works on phones, tablets and computers. Your progress is saved on this device.
