**CSL Round 15: A Battle of the Cities between Beijing and Shenzhen**

The Chinese Sudoku League (CSL), a prestigious regional competition for Sudoku enthusiasts, has recently concluded its 15th edition, known as CSL Round 15. This event took place across the country, with a particular focus on the intense rivalry between Beijing and Shenzhen. These two cities, renowned for their competitive culture, have been inseparable since the establishment of the Chinese Sudoku League, and CSL Round 15 serves as a testament to their ongoing rivalry and the passion of their participants.

**The Structure of CSL Round 15**

CSL Round 15 featured a total of 20,000 players from across the country, divided into both regional and national categories. The competition was divided into three rounds, each with its own set of challenges and winners. The first round, known as the " preliminary round," saw players competing in categories such as "Classic Sudoku," "Sudoku X," and "Sudoku 16x16." The winners of this round advanced to the final round, where the action was as intense as ever.

**The Winners of CSL Round 15**

The winners of CSL Round 15 were celebrated for their dedication and skill. For the "Classic Sudoku" category, the winner was announced as **Liam Zhang** from Beijing. He claimed to have solved 15 puzzles in just three hours, showcasing his speed and accuracy. In the "Sudoku X" category, **Eva Wang** from Shenzhen emerged as the champion, winning the competition with her exceptional problem-solving skills. For the "Sudoku 16x16" category, **Max Yang** from Beijing was the winner, with his solution being a masterclass in logical reasoning.

**Key Takeaways**

CSL Round 15 was a thrilling event that highlighted the competitive spirit of Sudoku fans across the country. The rivalry between Beijing and Shenzhen was evident in the number of players and the intensity of the competition. Both cities saw their participants perform exceptionally well, with the winners being celebrated for their hard work and dedication.

**Conclusion**

In conclusion, CSL Round 15 was a significant event that not only showcased the skills of participants but also highlighted the strong bond between Beijing and Shenzhen within the Sudoku community. The competition was a testament to the passion and determination of those who participated, and it will leave a lasting impact on the Sudoku world.