Normal sudoku rules apply. In addition, a clue next to a row or column indicates the sum of the digits "sandwiched" between the 1 and the 9 in that row or column.
Solution code: Row 2 and column 2
on 29. December 2020, 23:53 by apendleton
Slick break-in. Not too hard, but enough to be satisfying.
on 13. August 2020, 09:12 by Statistica
Great! Clever construction.
on 19. July 2020, 15:31 by Nylimb
Excellent!
on 18. July 2020, 16:34 by MartinR
Nice solving path, and really neat construction with the clue layout