Sudoku gets easier when you solve with a repeatable scan instead of searching the whole grid at once.
Beat the 12:00 countdown on a hard Sudoku puzzle.
Use arrow keys to move, number keys to enter values, Delete to erase, N to toggle notes, U to undo, H for a hint, and Escape to clear selection.
Hard puzzle loaded.
Internet Sudoku
Speed Run Hard Sudoku - Hard - Puzzle speed-run-2026-05-18-hard-1sak7dt
The May 18, 2026 speed-run set has one unique puzzle for each difficulty. The selected hard puzzle has a 12:00 limit and belongs to the dated speed-run set.
Speed-run leaderboard scores are separate from daily puzzle leaderboards, so timed solves compete only with other timed completions.