Sudoku gets easier when you solve with a repeatable scan instead of searching the whole grid at once.
March 21, 2026
The fewest givens and the most patience. This daily master 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.
Master puzzle loaded.
Internet Sudoku
Daily Master Sudoku - Master - Puzzle daily-2026-03-21-master-13v2j5h
The March 21, 2026 daily set includes Easy, Medium, Hard, Expert, and Master puzzles. The selected puzzle is master, with 24 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 master printable Sudoku.
Each difficulty has a printable puzzle page and a separate answer key.
Bookmark this master puzzle for the exact date and difficulty, or use Today’s Sudoku for the current daily set.
The top-level difficulty pages, including Master Sudoku, always open today’s puzzle for that level.