Unique Rectangle Sue de Coq
Unique Rectangle Sue de Coq: Because the puzzle has exactly one solution, any pattern that would give two can be ruled out.
How it works on this board
Following the Sue de Coq constraint, assuming the target makes the pattern swappable
7
3
6
2
1
6
9
1
4
7
5
6
7
6
4
6
2
7
7
9
2
1
5
4
6
1
5
2
9
9
6
4
1
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