Logic Masters Deutschland e.V.

Normal sudoku rules apply.

Every cell in this grid is either 1) the sum of its row and column numbers, 2) the product of its row and column numbers, 3) part of a Southeast facing little killer clue equal to the aforementioned sum, or 4) is none of the above.

Shade every cell that is 'none of the above' red and into one orthogonally connected region. On the negative diagonal, exactly 5 cells are red. In column 1, exactly 1 cell is red.

A cell that follows any of the first three conditions must be shaded green and into a separate orthogonally connected region. Every cell in the puzzle must be shaded either green or red.

Little killers: Digits along marked diagonals sum to the number indicated outside the grid.

Minimum: Cells with this constraint are smaller than all adjacent cells.

Inequality signs 'point' to the smaller digit.

SudokuPad link