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Pointing Differents Sudoku (175)
Other names:
Counting different Sudoku
Instruction:
Apply classic sudoku rules. Numbers outside the grid indicate the number of different numbers placed in the cells in the corresponding diagonal direction.
Reference:
WPF
(1)
Examples:
WPF Sudoku GP 2017 - Round 3
(4)
Parent puzzle:
Little Killer Sudoku
Related puzzles:
Detection Sudoku