Logic Masters Deutschland e.V.

Rules:

Normal Sudoku rules apply (place digits 1-9 once each in every row, column, and 3x3 box).

Normal Sandwich rules apply (clues outside the grid give the sum of the digits between 1 and 9 in the indicated row or column).

Normal Quadruples rules apply (digits in a white circle must appear at least once in the four cells surrounding the circle).

Comments are always welcome. I'd love to hear your thoughts about the puzzle. Have fun!

Streamers have permission to use this puzzle. Recommended betting cell for streaming is r5c8.

Play in SudokuPad