The Final Puzzle of the World Sudoku Championship
Jigsaw-Roundoku by Serhiy Grabarchuk

Emulating Tiger Woods by wearing red for the final round, Thomas Snyder signals that he's finished completing the final puzzle of the championship.

This is the final puzzle of the 2007 World Sudoku Championship. As reported in the London Times, champion Thomas Snyder solved the puzzle in a total of five minutes, including about a minute to double-check his answer. And if you aren't already impressed, Thomas knew that he had 10 minutes to solve this puzzle completely in order to secure the championship—so he actually took his time on this one!

Place the digits 1 through 9 into the empty cells so that each digit appears exactly once in each row, column, and in each of the nine outlined jigsaw pieces. Competitors were also given that the digits inside the round parts of the pieces must also be round (3, 6, 8, or 9), but this information is not required to find the unique solution.

 

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