Our playing guide
0h h1 · How to play
0h h1 turns empty cells into overlapping row and column constraints. There is no need to race: compare the fixed colors before choosing what the remaining spaces can contain.
Controls
Tap cells to cycle colors. Balance both colors in each row and column; avoid runs of three.
Rules & goal
- Three consecutive cells cannot have the same color.
- Each row and column must contain equal numbers of both colors.
- Two rows or two columns cannot be identical. Given tiles are locked.
Beginner tips
- Start with adjacent matching colors, or matching colors separated by one empty cell.
- Once one color occupies half a row, every remaining space must use the other color.
Progress & devices
Play in a desktop or mobile browser using the controls above. Some games save only in the current browser; clearing site data can remove saves. Pause when stepping away. Reloading is not guaranteed to preserve the current round.