What is Level 19 in Sudoku?

Level 19 puzzles have 18 given clues. The fewer the clues, the harder the puzzle.

How is the ranking calculated?

Players are ranked based on the fastest completion time for Level 19 puzzles on 2025-05-19.

This leaderboard shows the top 50 players who solved Level 19 Sudoku puzzles with 18 clues the fastest on 2025-05-19.

Level 19 is part of Sudoku99’s structured difficulty progression, where lower clue counts mean greater challenge.

Rank	Nickname	Country	Time	Puzzle
1	Guest #25192		00:09:58	#874579
2	Guest #25191		00:14:15	#147327

What does Level 19 mean?: It corresponds to puzzles with 18 clues. Fewer clues means higher difficulty.
How often is this ranking updated?: Every day. Rankings reset daily and show results for the current date.
Can I appear without logging in?: Yes. You can still appear in the leaderboard as a guest player.