Logic Masters Deutschland e.V.

Mixed rules. Link to puzzle. sudokupad. There is a video solution and more puzzles on youtube channel "sudoku spot" video solution. Inspiration for position sum rule thanks to some of Richard's latest puzzles. Rules: Normal sudoku rules apply. Outside red sums are the sum of the first n numbers where n is the position of the 9 looking from that end. E.g. if the 9 were in the 3rd position you sum the first 3 numbers. 9 in the 5th position sum the first 5 numbers. Outside green sums are sandwich sums...the sum of the the numbers between the 1 and the 9. Cells separating white dots are consecutive numbers.