Logic Masters Deutschland e.V.

In addition to the normal Sudoku rules (the figures from 1 - 9 in each row, column and 3x3 block) the following rules apply:

1. In every block, the grey fields contain either only even or only odd figures

2. No figure touches the same figure with a corner of its field

3. The figures in the fields with arrows are rising (but not necessarily directly consecutive) from the arrow's start to the arrow's tip

4. The 7 mathematical operations in the small circles have to be read from left to right or from top to bottom. Examples: ":2" means the left figure divided by 2 equals the right figure; the < means the upper figure is smaller than the lower figure

Enjoy my 50th puzzle in this portal!