Open virtual256 opened 2 years ago
A vault is a cage with a restriction preventing any digit inside the cage from also touching the outside of that cage orthogonally. Digits may repeat in vaults if allowed by other rules.
See this classic/vault sudoku as an example: https://f-puzzles.com/?id=yk4qm4u8
A vault is a cage with a restriction preventing any digit inside the cage from also touching the outside of that cage orthogonally. Digits may repeat in vaults if allowed by other rules.
See this classic/vault sudoku as an example: https://f-puzzles.com/?id=yk4qm4u8