Fill the hexagon grid with 1,2,3 and 4 only. All purple straight line must have 2,3 and 4 exactly one time and 1 can appear multiple times. For e.g. 6-digit long line have 1,1,1,2,3,4 and 7-digit long line have 1,1,1,1,2,3,4.
Both numbers around white dot differs by 1. One number around black dot is twice of another number. Not all black/white dots are given.
Lösungscode: Sum of all digit around black dots