The World Sudoku Championship is a big event where people from all around the world compete to see who is really good at solving Sudoku puzzles. Sudoku is a kind of math puzzle where you have to put numbers in the right places on a grid. The grid is split up into smaller sections which are usually squares with even smaller squares inside them.
Each section is supposed to have the same numbers in it without repeating any numbers. The same rule applies to all rows and columns in the grid as well. It can be pretty challenging, but also a lot of fun!
Now, every year, the World Sudoku Championship is held in a different country. People who are really good at solving Sudoku puzzles can qualify to join the national team from their country and represent their nation at the event.
They compete in different categories, like the classic Sudoku with 9 by 9 grid, or different variations like Killer Sudoku, Samurai Sudoku, and others. They have to solve as many puzzles as they can in as little time as possible, and whoever solves the most puzzles correctly and in the quickest time, wins! It's a really exciting competition, and people who love Sudoku puzzles come from all over the world to watch and participate.