Doc's EXTREME Daily Sudoku
17 September 2021
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W wing
Grouped discontinuous nice loop
A.I.C
X wing
Empty rectangle (hinge)
Empty rectangle (hinge)
Turbot fish
Finned Swordfish
Finned Swordfish
Jellyfish
WXYZ Wing
Grouped discontinuous nice loop
Discontinuous Nice Loop
Discontinuous Nice Loop
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