Bidoku

Bidoku is a sudoku-like puzzle. There is exactly one solution — and you can reach it through pure logic. No guessing needed.

Goal: Fill every cell with ✖️ or ⭕.

But follow these rules:

• Rule 1. No Threes. Never place three identical symbols in a line — across or down. ⭕⭕✖️ ✓ — ⭕⭕⭕ ✗

• Rule 2. Balance. Each row and each column must have equal numbers of ✖️'s and ⭕'s.

• Rule 3. No Duplicates. Every row must be unique. Every column must be unique.

Tap a cell once to place ✖️, tap it again to change to ⭕, and once more to clear it.

Stuck? Use Hints — they will point you to a cell where logic can make progress.

Red cells indicate a rule violation.