Logic Masters Deutschland e.V.

Rules:
Sudoku: Place the digits 1-9 into each row, column and outlined 3x3 box without repeats.
Arrow: Digits along an arrow sum to the digit in that arrow's circle.
Molecules: Cells are either electrons or non-electrons. A cell containing a digit from 1-5 is an electron. Each atom ( big circles around corners) contains electrons whose digits sum to 8. (Electrons can contain digits greater than 5.)
Difference: Cells separated by a white dot are consecutive. Not all dots are necessarily given.

Puzzle Links: You can solve this puzzle in CTC software.