Doc's EXTREME Daily Sudoku
16 December 2023     
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Unique side Hidden rectangle
Swordfish Swordfish
XY Wing XY Wing
W wing Discontinuous Nice Loop
Discontinuous Nice Loop Discontinuous Nice Loop
Discontinuous Nice Loop Discontinuous Nice Loop
Discontinuous Nice Loop W wing
Grouped discontinuous nice loop Empty rectangle (hinge)
Turbot fish W wing
W wing W wing
Hidden rectangle Hidden rectangle
Sashimi X-wing Empty rectangle (hinge)
Empty rectangle (hinge) Turbot fish
W wing Sashimi X-wing
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