Sudoku gets easier when you solve with a repeatable scan instead of searching the whole grid at once.
March 20, 2026
Fewer givens and more scanning. This daily hard puzzle is tied to the UTC date, so the same grid is available all day.
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
Daily Hard Sudoku - Hard - Puzzle daily-2026-03-20-hard-z03zw3
The March 20, 2026 daily set includes Easy, Medium, Hard, Expert, and Master puzzles. The selected puzzle is hard, with 31 starting clues and one verified solution.
Daily puzzles use a UTC date key, so players see the same grids globally for the same calendar date. Your entries, notes, timer, mistakes, and pause state are stored only in this browser.
If you want to solve away from the screen, use the printable page for a clean grid and a separate solution. The printable version of this puzzle is the hard printable Sudoku.
Each difficulty has a printable puzzle page and a separate answer key.
Bookmark this hard puzzle for the exact date and difficulty, or use Today’s Sudoku for the current daily set.
The top-level difficulty pages, including Hard Sudoku, always open today’s puzzle for that level.