Greek Key
- XV and number dots
- Modular lines
The brief
Standard sudoku rules apply.
Modular lines: Modular lines: every set of three sequential digits along a line must contain a complete set of residues modulo 3, i.e. one digit from {1,4,7}, one from {2,5,8}, and one from {3,6,9}. Digits may repeat on a line if allowed by other rules.
XV constraint: Digits separated by an X sum to 10. Digits separated by a V sum to 5. Not all possible X's or V's are necessarily shown.
Exported from f-puzzles.com