What is Level 18 in Sudoku?

Level 18 puzzles have 19 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 18 puzzles on 2025-06-09.

This leaderboard shows the top 50 players who solved Level 18 Sudoku puzzles with 19 clues the fastest on 2025-06-09.

Level 18 is part of Sudoku99’s structured difficulty progression, where lower clue counts mean greater challenge.

Rank	Nickname	Country	Time	Puzzle
1	Guest #27664		00:11:49	#502194
2	Guest #27667		00:16:41	#0295618

What does Level 18 mean?: It corresponds to puzzles with 19 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.