A large size SuDoku puzzle
This puzzle is just a larger one as a normal sudoku puzzle.Each letter from "A" to "P" must appears once and only once in each row,column and 4*4 block.You can also consider the letters as numbers from 1 to 16, so it's more like a traditional sudoku.
Measures were taken to make sure that the answer is UNIQUE.But to get the right answer is not a easy job.
I hope you will like this puzzle.If you finally figure it out, I think, it can really proves you are Excellent.Please let us know if so.
Good luck!