Yin-Yang
White and black circles in every square: each colour one connected group, and never a 2×2 block.
中文How to play
- Every square gets a white or a black circle. Some are given.
- All white circles connect along sides, and so do all black circles.
- No 2×2 block of squares may be all one colour.
- Tap a square to cycle white, black, empty.
- Every puzzle has one answer; a hint fixes a wrong circle or places a correct one.
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