In December 2020 there was a logic puzzle advent calender on mathebau.rocks. These puzzles will be uploaded to the puzzle portal in the next weeks.
Rules: Place a black or white circle in every cell such that all circles of the same color are horizontals and vertically connected and in no 2x2 area are circles of only one color.
Solution code: For every second row (2nd, 4th, 6th row etc.) the number of black circles (top to bottom)
on 25. July 2021, 13:04 by CJK
Labels den neuen Regeln angepasst
on 19. January 2021, 01:02 by SudokuExplorer
Lovely puzzle! I found it an interesting challenge. Thanks CJK :-)