Tango 10x10 grids

The Tango 10x10 puzzle

The 10x10 Tango grid is the summit of the game, the expert format reserved for those who already master every technique. A hundred cells, five suns and five moons to place per row and per column: nothing is immediate, and a single missed deduction can stall you for long minutes.

At this level, solving is a genuine investigation. You constantly combine every method: quota counting by row and column, the three-in-a-row rule, propagating the = and × clues, and sometimes reasoning chains where one deduced cell triggers three or four more before concluding. Patience and rigor matter as much as speed.

Exhaustively tracking the sun and moon count is no longer optional but an absolute necessity: across ten rows and ten columns, visual memory saturates instantly. Work the rows and columns closest to their quota first, and do not hesitate to clear and restart cleanly if the board becomes unreadable.

Despite the difficulty, the promise holds: the solution is unique and fully deducible, without a single gamble. This is the size of the weekly challenge, the hardest grid of the week. If the 10x10 gives you trouble, consolidate on the 8x8 before returning. The 10x10 grids are free and unlimited.