Round two of the competition included six basic variants with the arranged givens centered on the letters DS – which was the initial of the high school. One of the puzzle I was responsible was the Killer Sudoku. Again, the level should be suitable for attracting new solvers.
Killer Sudoku: Fill in numbers 1-9 so that no number repeats in any row, column or 3×3 outlined regions. The sum of all numbers in a region is given. Numbers may not repeat in a region.