SUDOKUUniversity

How to Play: The Basics

Sudoku Advanced Technique Diplomas

Earn your diplomas by completeing the coursework and solving all the test puzzles. Diplomas must be earned in order from easiest to hardest. Happy learning and STAY SHARP.

Single position

Single position

easy
Hidden single

Hidden single

easy
Candidate line

Candidate line

medium
Multiple lines

Multiple lines

medium
Naked pairs

Naked pairs

advanced
Hidden pairs

Hidden pairs

advanced
X-wing

X-wing

advanced
Swordfish

Swordfish

advanced
Forcing chains

Forcing chains

expert
Nishio

Nishio

expert