SudokuCompetition

I had a Sudoku competition in my school. I was up against Han Chu. He is very fast but he makes small mistakes. There was a 2 minute penalty for mistakes. During the competetion, He submitted the paper first, but he had made mistake!! I rushed quicklyand submitted it seconds before him!!!!!
I had not made mistakes and clinched the 1st prize!!!!!!!
Hanchu got the second prize.A girl from my class won the third prize! The other classes had not won any prizes at all!