Normal sudoku rules apply.
The grey lines are palindromes that read the same in both directions.
Digits in cages sum to 12; negative constraint applies -- no unmarked dominoes sum to 12.
Digits separated by a V sum to 5 (not all V's are necessarily shown).
Have fun, leave a comment if you enjoy the puzzle!
Solution code: Row 5 followed by Row 7
on 21. July 2022, 20:48 by CaptRob
Very nice, not too hard puzzle. Thanks a lot @Blobz and happy birthday.
on 19. July 2022, 03:25 by sacklunch
Great puzzle, thank you! And happy birthday :)
on 16. July 2022, 14:15 by Chelo
Very nice birthday puzzle @Blobz, my best wishes for the 57th Birthday to whoever it is!..