#19 - Kropki 12x12
Kropki 12x12 Place in each cell a integer from 1 to 12 so that every number appears exactly once in each row and each column. A black dot between two cells means that one of the corresponding numbers is double the other. A white dot between two cells means that the corresponding numbers are consecutive. The lack of any dot between two cells means that neither of those properties is satisfied by the corresponding numbers. Penpa link for online solve: https://tinyurl.com/2g8jpgvb