What is Sudoku on Greatest Games?
Sudoku on Greatest Games is a free daily logic puzzle published by a San Francisco studio. A new grid appears every day at midnight US Eastern, playable in the browser with no account required. Each day offers four difficulty tiers—Easy, Medium, Hard and Very Hard—each timed independently. The rule is standard: fill every row, column and 3×3 box with digits 1 to 9 without repeats.
How to play Sudoku on Greatest Games
- Choose your difficulty tier from the menu. Easy provides 62 given digits and 19 blanks; Very Hard starts from 35 givens.
- Tap a cell, then tap a digit on the pad or type 1 to 9. Tap the same digit again or press Erase to clear the cell.
- Turn on Notes mode to pencil small candidate digits into a cell while reasoning. Notes do not count as entries.
- Watch the colour signals: given digits are plain, your entries appear in the accent colour, and a digit that clashes with a matching one in its row, column or box turns red.
- Fill the entire grid without repeats in any row, column or box, and clear every red cell before the puzzle counts as solved.
- Check the scoring panel at the end: 100 points for the solve, one point per day of your current streak, and one speed bonus if you beat the tier's time cutoff.
Scoring and speed bonuses
Each game starts with 100 points. Your current streak adds one point for every day, and you get one speed bonus: 35 points for Lightning, 20 for Fast, or 10 for Quick. Each difficulty has its own time cutoffs. On Easy, they are 1:30, 2:20, and 4:05. On Very Hard, they are 8:00, 14:00, and 23:20. Your leaderboard total is the sum of your scores from every daily game you play.
Difficulty tiers explained
Easy has 62 givens, and singles alone usually solve the puzzle. Hard introduces box-line reduction. Very Hard has only 35 givens, so singles will only get you started. Medium falls between the two, but the site does not publish its number of givens. Each tier presents a different puzzle and has its own timer.
Reading the feedback
A given digit cannot be changed. Your entries appear in the accent colour. If a digit duplicates one in its row, column, or box, it turns red; all red entries must be cleared before the grid is solved. The LEFT counter above the grid shows how many cells remain empty. Notes mode lets you pencil in candidates without entering them. There is no hint button or mistake counter, and the score appears only when you finish.
Tips for solving
Scan by digit rather than by cell. Pick a number and sweep the board for boxes where the row and column already rule out every cell but one. This cross-hatching method appears first in the site's own tips.
Watch for naked singles: when a cell's row, column, and box rule out eight digits, the ninth is forced. On Easy, singles will usually take you to the end.
When singles run out, look for pairs. If two cells in one unit share the same two candidates, those digits cannot appear in any other cell in that unit. Remove them from the remaining candidates.
On Hard grids, box-line reduction does most of the work. If a digit can go in only one row within a box, remove it from that row everywhere outside the box.
Keep your notes current. A stale candidate is worse than no note at all. On the two hardest levels, fill in candidates and prune them after every placement. On Easy, you can skip notes.
Never guess. The site calls the red conflict flag a seatbelt, not a strategy. Every board has one solution, so go back and find the deduction you missed.
Archive and daily reset
The calendar button in the top bar opens past dates. A new set appears every day at midnight US Eastern. Use the Back to today link to return to the current puzzle.