Plusses and minuses
Rules:
1. Standard: Normal sudoku rules apply.
2. Standard killer: Cells in cages must sum to the given total.
3. Standard little killer: Cells along indicated diagonals must sum to the total given, and may include repeated digits if permitted by other rules.
4. Standard kropki: Cells connected by a black dot must have a ratio of 1:2. Not all possible black dots are given.
5. Standard anti-king: Digits cannot be placed from a king's move (in chess) apart from the same digit.
I hope you enjoy the puzzle. Please feel free to leave comments.
Solution code: Row 5 + column 5, 18 digits with no spaces or commas
on 15. May 2022, 10:39 by FinnishGuy
CtC link added
on 13. July 2021, 20:08 by Timwi
Enjoy this puzzle on Zinga: https://zinga.timwi.de/LNUGMZogc8Udik3xVo9JK1