As always the case after making puzzles for a contest, I had a few unused puzzles and I would like to share them here in the portal. At the same time, I can make some extra advertisement for the contest. Participation is free, only a registration at LMI is necessary. You can solve the puzzles whenever you like in the weekend. After downloading the .pdf-file you have 100 minutes to submit your solutions. You can find the instruction booklet here.
Toroidal Sudoku
Place the digits from 1 to 7 in every row, column and bold outlined irregular area. Some of the areas wrap around the grid, from top to bottom and/or from left to right.
Solution code: Row 1, followed by row 6.
on 12. April 2022, 14:24 by Nick Smirnov
Penpa:
https://tinyurl.com/ycolsf37
on 8. July 2014, 17:19 by CHalb
Funny area shape(s)!
on 5. July 2014, 06:07 by Richard
Typo fixed in instructions.