Accuracy
The brief
- Normal sudoku rules apply, i.e. each Row, Column, and 3x3 regions has to contain the digits from 1 to 9 once each.
- Diagonal Target Sums: A clue X outside the grid indicates that the digit X appears on the marked diagonal and all the digits that (seen from the clue) appear on the diagonal before reaching the first instance of the digit X must sum to X.