Medium Sudoku — free puzzles that need hidden singles

Play Sudoku

Score0

Loading…

Level—

Mistakes0/3

Time0:00

Stuck? Press Hint. It starts by showing you where to look, and only counts once you place the number.

Puzzle no. —

Records

No records yet. Finish one puzzle and it shows up here.

Level	Solved	Best time

How the score works

+10 for each cell you fill correctly, −20 for each mistake and −30 for each hint, all multiplied by the level (Easy 1 to Expert 5). Finish the puzzle and 600 seconds minus your time is added, multiplied the same way.

About 30 givens. Cells with one candidate run out early, so you switch questions: in this box, where can the 7 still go?

New at this level

Hidden Single (Box) — Only one cell in this box can hold that digit
Hidden Single (Line) — Only one cell in this row or column can hold that digit

All levels

Easy · naked singles only
Medium · up to hidden singles
Hard · up to pairs
Very hard · up to intersections and triples
Expert · up to advanced techniques
How sudoku difficulty is graded