Pairs, gaps and counting

The three moves behind almost every Binairo.

Pairs: 00 must be bordered by 1s (100 or 001), and 11 by 0s.

Gaps: 0_0 forces a 1 in the middle, and 1_1 forces a 0.

Counting: a row of 8 has four 0s and four 1s. Once four 1s are placed, every empty cell is 0.

Unique lines: if a row with two empty cells matches a finished row everywhere else, the two empty cells must be filled the other way round.

Practise it

The Hint button on every puzzle explains the next step in the same plain language, so you can learn as you play. Play a Binairo puzzle.