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 shown).
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 shown).