Flashback #8 – Killer Sudoku

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.

Nonthaburi, August 2011

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