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1-5-9 Column Indexer Sudoku (1283)
Instruction:
Apply classic sudoku rules. If the number X is in a grey cell in column Y in a given row, then in the same row the number Y is in column X.
Reference:
WPF
(1)
Examples:
WPF Sudoku GP 2026 - Round 8
(247)
Parent puzzle:
Sudoku