Unique Rectangle 3X/2
Unique Rectangle 3X/2: 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 strong link constraint, assuming the target makes the pattern swappable
7
5
9
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1
9
7
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3
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7
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7
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2
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1
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9
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7
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2
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9
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3
9
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7
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