Logic
Nullsen
Daily puzzle
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The binary logic puzzle: dot or ring — two symbols, clear rules.
Bring the grid into balance
Three cells are open — tap them: once for a dot, twice for a ring.
A fresh puzzle every day, the same for everyone — same grid, same chances. Play as a guest or compete against your friends in arenas with an account. No ads, free.
How it works
- Fill the grid with dots and rings: every row and every column contains an equal number of both.
- Never three identical symbols directly next to or below each other.
- No two rows and no two columns are identical — every line is unique.
- You have 3 hearts — every mistake costs one. No hearts left means the attempt is over.
Three rules, one equilibrium
Equal counts
Every row and column holds as many dots as rings.
Never three in a row
Three identical symbols side by side? Ruled out.
Every line unique
No two rows or columns are identical.
Sizes: 6×6 · 8×8 · 10×10