Standard sudoku rules apply: each row, column, and 3x3 box must contain all the digits from 1 to 9.
Purple lines are renban lines: digits on a line form a set of consecutive digits in any order, without repetition.
Light brown lines are nabner lines: no two digits on a line can be consecutive; there are no repeated digits.
Digits along the diagonal indicated by the arrow outside the grid must sum to the value by the arrow.
Solution code: Enter row 5.
on 12. October 2023, 21:48 by rdesmarais2
Setting up (pencil marking 2 options) the lines for boxes 2 5 7 and 9 I thought was some straightforward fun logic. Getting those lines determined though was very hard for me. Fun puzzle though.
on 8. October 2023, 23:03 by zalaklab
what a puzzle. Nice.