zy.go
lo.id
C++
Carbon
Clang
Projects
Yin Yang Puzzle Tool
Techniques:
No squares (2x2 same color)
Connectivity
No checkerboard (2x2 alternate)
Boundary connectivity
2x3 pattern
Border parity
Enclosure (no trapped empty regions)
Forcing chains
Brute force
Check true state
Undo
Clear