![Kirchheim, Germany. 30th Sep, 2019. An organizer holds up a bow with Sudoku puzzles, while in the background participants of the Sudoku World Championship brood over their puzzles. Until Saturday, around 230 Kirchheim, Germany. 30th Sep, 2019. An organizer holds up a bow with Sudoku puzzles, while in the background participants of the Sudoku World Championship brood over their puzzles. Until Saturday, around 230](https://c8.alamy.com/comp/2A24C2W/kirchheim-germany-30th-sep-2019-an-organizer-holds-up-a-bow-with-sudoku-puzzles-while-in-the-background-participants-of-the-sudoku-world-championship-brood-over-their-puzzles-until-saturday-around-230-ratefchse-from-around-30-countries-will-be-competing-against-each-other-in-the-competition-credit-uwe-zucchidpaalamy-live-news-2A24C2W.jpg)
Kirchheim, Germany. 30th Sep, 2019. An organizer holds up a bow with Sudoku puzzles, while in the background participants of the Sudoku World Championship brood over their puzzles. Until Saturday, around 230
![Prague, Czech Republic. 07th Nov, 2018. The World Sudoku & Puzzle Championship was held in Prague, Czech Republic, on November 7, 2018. On the right side is seen Letian Ming from China. Prague, Czech Republic. 07th Nov, 2018. The World Sudoku & Puzzle Championship was held in Prague, Czech Republic, on November 7, 2018. On the right side is seen Letian Ming from China.](https://c8.alamy.com/comp/R0YEJ7/prague-czech-republic-07th-nov-2018-the-world-sudoku-puzzle-championship-was-held-in-prague-czech-republic-on-november-7-2018-on-the-right-side-is-seen-letian-ming-from-china-credit-michaela-rihovactk-photoalamy-live-news-R0YEJ7.jpg)
Prague, Czech Republic. 07th Nov, 2018. The World Sudoku & Puzzle Championship was held in Prague, Czech Republic, on November 7, 2018. On the right side is seen Letian Ming from China.
![Will Shortz Presents Puzzles from the World Sudoku Championship: 100 Wordless Crossword Puzzles: Shortz, Will, Shortz, Will: 9780312376352: Amazon.com: Books Will Shortz Presents Puzzles from the World Sudoku Championship: 100 Wordless Crossword Puzzles: Shortz, Will, Shortz, Will: 9780312376352: Amazon.com: Books](https://m.media-amazon.com/images/I/51yN-5NAw9L._AC_UF1000,1000_QL80_.jpg)
Will Shortz Presents Puzzles from the World Sudoku Championship: 100 Wordless Crossword Puzzles: Shortz, Will, Shortz, Will: 9780312376352: Amazon.com: Books
![GC2BZDD Advanced Sudoku Strategies: X-Wing (Unknown Cache) in California, United States created by UncleTom (maintained by kindredlaugh) GC2BZDD Advanced Sudoku Strategies: X-Wing (Unknown Cache) in California, United States created by UncleTom (maintained by kindredlaugh)](http://img.geocaching.com/cache/0c5ecb4a-9889-43cf-b58d-b1dc99c53b46.jpg)
GC2BZDD Advanced Sudoku Strategies: X-Wing (Unknown Cache) in California, United States created by UncleTom (maintained by kindredlaugh)
![Prague, Czech Republic. 07th Nov, 2018. The World Sudoku & Puzzle Championship was held in Prague, Czech Republic, on November 7, 2018. On the photo is seen Jakub Ondrousek from Czech Republic. Prague, Czech Republic. 07th Nov, 2018. The World Sudoku & Puzzle Championship was held in Prague, Czech Republic, on November 7, 2018. On the photo is seen Jakub Ondrousek from Czech Republic.](https://c8.alamy.com/comp/R0YEJW/prague-czech-republic-07th-nov-2018-the-world-sudoku-puzzle-championship-was-held-in-prague-czech-republic-on-november-7-2018-on-the-photo-is-seen-jakub-ondrousek-from-czech-republic-until-now-ondrousek-was-the-world-record-holder-he-solved-the-sudoku-grid-in-1-minute-and-25-seconds-in-2010-credit-michaela-rihovactk-photoalamy-live-news-R0YEJW.jpg)
Prague, Czech Republic. 07th Nov, 2018. The World Sudoku & Puzzle Championship was held in Prague, Czech Republic, on November 7, 2018. On the photo is seen Jakub Ondrousek from Czech Republic.
![Will Shortz Presents The First World Sudoku Championship: 100 Wordless Crossword Puzzles: Shortz, Will, Shortz, Will: 9780312363703: Amazon.com: Books Will Shortz Presents The First World Sudoku Championship: 100 Wordless Crossword Puzzles: Shortz, Will, Shortz, Will: 9780312363703: Amazon.com: Books](https://m.media-amazon.com/images/I/81nEf+ibP6L._AC_UF1000,1000_QL80_.jpg)