Binairo

Einstein Binairo is the hardest level: a 14×14 grid with 196 cells. Seven 0s and seven 1s per row and column. These puzzles are T3 ultra-heavy — uniqueness is the primary technique from start to finish, firing far more often than in Expert.

Every puzzle is certified solvable by pure logic — no guessing, no trial-and-error. The solve path relies on uniqueness deductions that span multiple rows and columns simultaneously. When you find yourself stuck, the answer is almost always to find two rows or columns that are on a collision course and determine which cells must differ.

These puzzles are designed for experienced solvers who have mastered Expert. Budget at least 20–30 minutes. If you finish one in under 15 minutes, you are in rare company.