Delta
Rules:
1. Standard: Normal sudoku rules apply.
2. Standard killer: Cells in cages must sum to the given total.
3. Standard arrow: Cells along an arrow must sum to the total of the arrow's circle.
4. Standard kropki: Cells connected by a white dot must be consecutive. Not all dots are given.
5. Standard X: Cells connected by an X must sum to 10. Not all Xs are given.
6. Standard little killer: Cells along indicated diagonals must sum to the total given, and may include repeats if permitted by other rules.
Solution code: Row 5 + Column 5, 18 digits with no spaces or commas