Halves

Rules

• Fill every square with a disc or a ring.
• No more than two of the same side by side in a row or column.
• Each row and column has as many discs as rings.
• No two rows are the same, and no two columns are the same.

Difficulty

Difficulty is the rule you need most: pairs and gaps for Easy, counting for Medium, comparing whole lines for Hard. Every puzzle here has exactly one solution, checked by a program, and can be solved step by step without guessing.

Techniques and controls