I have created the following killer sudoku, I though it was easy until, Jsudoku said that the following techniques were needed.
3x3::k:5121:5121:3331:3331:5126:5126:4361:4361:4361:5121:4098:4098:3332:4101:5126:5126:4361:3336:4098:4098:3332:3332:4101:4101:5895:3336:3336:1294:3597:3597:7436:7436:5895:5895:5643:3336:1294:3597:7436:7436:4874:4874:5895:5643:5643:5903:5903:5903:7436:4114:4874:4874:4874:3863:5903:4115:4115:4884:4114:2838:2838:3863:3863:2576:4115:4884:4884:4114:4629:2838:4121:3352:2576:2065:2065:4884:4629:4629:4121:4121:3352:
Naked Single
Hidden Single
Single Innies & Outies
Unique Pair
Naked Pair
Hidden Pair
Unique Triplet
Intersection
Odd Pairs
Odd Triplets
Double Innies & Outies
Mandatory Inclusion
Odd Quads
Complex Intersection
Triple Innies & Outies
Double Outies minus Innies
Complex Naked Pair
Complex Hidden Pair
Conflicting Pair
Quadruple Innies & Outies
Could somebody grade this puzzle and tell me what constitutes an easy, Medium, Hard and Extreme killer sudoku puzzle please?
Thank you in advance.