Doc's EXTREME Daily Sudoku
13 December 2021     
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Hidden rectangle Finned X wing
Two String Kite Empty rectangle (hinge)
Empty rectangle (hinge) Finned X wing
Finned X wing Discontinuous Nice Loop
Discontinuous Nice Loop Grouped discontinuous nice loop
Discontinuous Nice Loop Discontinuous Nice Loop
A.I.C Grouped discontinuous nice loop
Grouped discontinuous nice loop Discontinuous Nice Loop
Brute Force XY Wing
Unique side XYZ Wing
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