6 × 6 is the smallest Binairo grid and the right place to learn the format. Each row and column needs exactly three 0s and three 1s, no symbol may appear three times in a row, and no two rows or columns may repeat. With only 36 cells, every deduction is close at hand: spot a pair of identical digits and cap both ends, or fill the gap in a 1_1 sandwich with a 0.
Small boards are also where the counting habit forms. The moment a row holds its third 1, the remaining cells are all 0s — on a 6 × 6 that single observation often finishes the line outright.
New to binary puzzles? Read the how-to-play guide first, warm up on a few easy puzzles, then try today's daily Binairo.