Balance

How to play

Fill every cell with a dot or a ring. No row or column may have three of the same symbol in a row, and every row and column holds as many dots as rings. On Hard, no two rows may be identical, and no two columns either. The shaded symbols are given and can't be changed. The puzzle is also known as binary Sudoku, or simply the binary puzzle.

Tap a cell to place a dot, again for a ring, and once more to clear it. Long-press (or right-click) goes the other way. Anything that breaks a rule is marked straight away.

Shortcuts

• Arrow keys move; 1 places a dot, 2 a ring, 0 clears; Space cycles.
• Z undoes, Y redoes, H asks for a hint.