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How to solve Videos Forum Timed Rankings Books Specials Print 18 Nov 2017
Easy:
4×4
6×6
Sudoku
Medium:
4×4
6×6
8×8
Sudoku
Difficult:
4×4
6×6
8×8
9×9
Killer
Extra
7 × 7 Extra, Rating: ★★★★★  Points: 8     Solved 27 times
Calcudoku twin  -  these two puzzles have the same solution

Today this puzzle is for subscribers only
(Extra)
Note: This is a 'no-op' puzzle (also called 'Mystery Calcudoku'):
set the operation of a cage using the Shift + left/right arrow keys
total
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