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Apply classic sudoku rules. Dutch Flat Mates: Every digit 5 has either a 1 directly above it, or a 9 directly below it, or both. Next to N: Clues on the left and above the grid indicate all direct neighbours of the digit N in the corresponding row or column, where N is the index number of the row or column. Clues are placed in ascending order, and not necessarily the order in which they appear in the solved grid. Question marks may be replaced by any digit 1-9. The index numbers of the rows and columns are given in a grey font below and on the right of the grid for your convenience.
Dutch Flat Mates: Next to N
By Richard
Apply classic sudoku rules. Dutch Flat Mates: Every digit 5 has either a 1 directly above it, or a 9 directly below it, or both. Next to N: Clues on the left and above the grid indicate all direct neighbours of the digit N in the corresponding row or column, where N is the index number of the row or column. Clues are placed in ascending order, and not necessarily the order in which they appear in the solved grid. Question marks may be replaced by any digit 1-9. The index numbers of the rows and columns are given in a grey font below and on the right of the grid for your convenience.