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Cloned Strands Sudoku (220)
Instruction:
Apply classic sudoku rules. Each strand must have exactly the same sequence of digits. A digit can appear more than once on a single strand.
Reference:
WPF
(1)
Examples:
WPF Sudoku GP 2017 - Round 4
(5)
Parent puzzle:
Sudoku
Related puzzles:
Clone Sudoku