For those who know what Sudoku is, I've been trying to prepare myself for a contest, with a prize of $300 for first place and other prices for 2nd and 3rd. Basically need to be the fastest to finish 6 lv4 Sudoku sets. Only 6 people get to play in the finals. To get to the finals, you have to finish 6x lv3 Sudoku sets in 30minutes or less, and if
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