Logic Masters Deutschland e.V.

Richard and I have created a fresh sudoku advent calendar in which we combine a well known variant with a relatively unknown variant every day. Combining variants leads to interesting and surprising new solving techniques.

Logically solvable
All puzzles can be solved completely logically although the logic is sometimes well hidden and is inherent to the combination of restrictions that the different types offer. For that reason we have written some solving hints for most of the puzzles, published in a very tiny font. If you want to read the hints, simply copy these in a text editor and enlarge the font size.

1~7
Place the digits from 1 to 9 in every row, column and 3x3-block. Numbers outside the grid are the sum of the digit(s) placed between 1 and 7 (not 9 like standard!) in the corresponding row or column. (A zero outside the grid means that 1 and 7 are placed next to each other.)

Slot Machine
The three shaded columns are like the rolls on a slot machine. The 9 numbers they contain have to be in exactly the same order, taking into account that they wrap around the grid from top to bottom.