Logic Masters Deutschland e.V.

Column Indexing: Digits placed in red cells (all of columns 2, 5, and 8) indicate the position of the corresponding column number in that row. For example, if r1c2 were a 6, then r1c6 would be a 2.

Row Indexing: Digits placed in green cells (all of rows 2, 5, and 8) indicate the position of the corresponding row number in that column. For example, if r2c1 were a 6, then r6c1 would be a 2.

Try the puzzle on the SudokuPad app by Sven Neumann.

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