Irregular XV Sudoku Rules
Sudoku XV is the variation of the original sudoku. Classic Sudoku Rules apply. Additionally, if an X is given between two adjacent cells, the digits in those cells sum to 10. If a V is given between two adjacent cells, the digits in those cells sum to 5. If an X or V is not given, the two digits cannot sum to 5 or 10.
Irregular XV Sudoku Additional Rules
Irregular Sudoku Rule: Each row, column, and irregularly shaped block must contain all the digits (1-9) without repetition. This is the key difference.
Sudoku XV is the variation of the original sudoku. All adjacent cells with two digits summing to 10 are marked by X, while those summing to 5 are marked by V. The cells edges which do not contain an X or a V cannot have digits summing to 5 or 10.
Irregular XV Sudoku = Irregular Sudoku (Jigsaw Sudoku) + XV Sudoku