Rule 1: equal numbers in every line
Every row and column contains exactly half 0s and half 1s. A 6x6 line contains three of each, while a 14x14 line contains seven of each.
Rule 2: no three matching values in a row
Three adjacent 0s or three adjacent 1s are not allowed horizontally or vertically. Diagonal runs do not count.
Rule 3: every row and column is unique
Two completed rows cannot contain the same sequence. Two completed columns cannot contain the same sequence either.
Clues and player entries
Each puzzle begins with fixed clues. You can change only the blank cells. A well-formed published puzzle has exactly one solution that follows all three rules.
When the puzzle is complete
You win when every cell is filled, every line is balanced, no triple appears, and every row and column is unique. The checker reports rule conflicts without relying on color alone.