Binairo

Easy Binairo uses a 6×6 grid. Each row and column needs exactly three 0s and three 1s, and no three consecutive cells can hold the same digit. With only 36 cells and generous givens, the consecutive forcing rule handles most of the work.

Start by scanning for pairs of adjacent identical digits. If two 0s sit next to each other, the cell on either side must be 1. Next, check counts: if a row already has three 1s, every remaining empty cell is 0. These two techniques chain together quickly on a 6×6 grid.

Once easy puzzles take you under 2 minutes, move to medium.