Nebulous Instructions
- Fog of war
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.
- Dynamic Fog: Some of the clues are covered in fog. Correctly placing a digit may reveal additional clues. No guessing is required.
- 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. A ? clue represents a value that must be determined by the solver.