challenging sudoku

How To Do Hard Sudokus In 10 Minutes

12:07

How To Do Hard Sudokus In 10 Minutes
Techniques for Hard Sudoku

17:59

Techniques for Hard Sudoku
The Simple Trick For Hard Sudokus

21:56

The Simple Trick For Hard Sudokus
The Sudoku Trick All Expert Solvers Know

17:53

The Sudoku Trick All Expert Solvers Know
'Hard' sudoku made easy - with this simple method

15:33

'Hard' sudoku made easy - with this simple method
Master The Basics Of Advanced Sudoku Solving

19:05

Master The Basics Of Advanced Sudoku Solving
How to solve very difficult sudoku puzzles

13:53

How to solve very difficult sudoku puzzles
Step-By-Step Method For Hard Sudokus

20:04

Step-By-Step Method For Hard Sudokus
Improve At Sudoku: What To Do When You Get Stuck

16:23

Improve At Sudoku: What To Do When You Get Stuck
Making a Hard Sudoku really easy

6:47

Making a Hard Sudoku really easy
The Hardest Killer Sudoku And How To Solve It

41:33

The Hardest Killer Sudoku And How To Solve It
The Basic Tips For Hard Sudokus

15:28

The Basic Tips For Hard Sudokus
Hard Sudokus Seem Impossible? This Shows You What To Do!

20:35

Hard Sudokus Seem Impossible? This Shows You What To Do!
The Hardest Sudoku... And How To Solve It

29:45

The Hardest Sudoku... And How To Solve It
How To Ace The New York Times Hard Sudoku

17:11

How To Ace The New York Times Hard Sudoku
Sudoku Tricks: The X-Wing And How To Spot It

16:57

Sudoku Tricks: The X-Wing And How To Spot It
Sudoku 101: Hidden Triples

19:04

Sudoku 101: Hidden Triples
The New Sudoku Trick That Almost Nobody Knows

27:47

The New Sudoku Trick That Almost Nobody Knows
One Of The Best Classic Sudokus Ever

19:27

One Of The Best Classic Sudokus Ever
Three Diabolical Sudoku Techniques

23:43

Three Diabolical Sudoku Techniques
One Quick Trick To Solve Most NYT Hard Sudokus

19:26

One Quick Trick To Solve Most NYT Hard Sudokus
Our Hardest Sudoku And How To Solve It (Slowly!)

40:38

Our Hardest Sudoku And How To Solve It (Slowly!)
Solving A Highly-Requested New York Times Sudoku

16:32

Solving A Highly-Requested New York Times Sudoku
Extreme Sudoku: Wings, Skyscrapers & Empty Rectangles

28:03

Extreme Sudoku: Wings, Skyscrapers & Empty Rectangles
Tricks For When You Get Stuck On A Hard Sudoku

21:32

Tricks For When You Get Stuck On A Hard Sudoku
Is This Sudoku Impossible?

53:13

Is This Sudoku Impossible?
The Sudoku With Only 2 Given Digits

33:00

The Sudoku With Only 2 Given Digits
Quick Tips To Improve Your Killer Sudoku: 1

5:24

Quick Tips To Improve Your Killer Sudoku: 1
How to solve 'Very Hard' Sudoku

12:09

How to solve 'Very Hard' Sudoku
Diabolical sudoku: Some more tips

16:43

Diabolical sudoku: Some more tips
The Hardest Sudoku Ever

1:08:50

The Hardest Sudoku Ever
How Hard Can A 4x4 Sudoku Be?

58:45

How Hard Can A 4x4 Sudoku Be?
A Sudoku Puzzle That WILL Improve Your Solving!

17:36

A Sudoku Puzzle That WILL Improve Your Solving!
Stuck on harder sudokus? Here's a new tip...

6:11

Stuck on harder sudokus? Here's a new tip...
Mission Impossible: Sudoku Edition

1:43:55

Mission Impossible: Sudoku Edition
Sudoku at its Most Elegant

11:01

Sudoku at its Most Elegant
Killer Sudoku: How to solve the most difficult varieties

25:49

Killer Sudoku: How to solve the most difficult varieties
Mastering The NYT "Hard" Sudoku + Puzzle News!

18:05

Mastering The NYT "Hard" Sudoku + Puzzle News!
Sudoku's Incredible Line

1:22:57

Sudoku's Incredible Line
Was This Sudoku Solver Right To Despair?

1:14:15

Was This Sudoku Solver Right To Despair?
IQ Boosting With Sandwich Sudoku

23:50

IQ Boosting With Sandwich Sudoku
Secrets to help crack hard sudokus

7:19

Secrets to help crack hard sudokus
Viewer-requested Monstrous Killer Sudoku

19:49

Viewer-requested Monstrous Killer Sudoku
Can You Place One Correct Digit In This Sudoku?!

1:45:10

Can You Place One Correct Digit In This Sudoku?!
The Minimum Number Of Given Digits For A Sudoku Is Now 14

48:36

The Minimum Number Of Given Digits For A Sudoku Is Now 14
We Got An Email About This Sudoku... He Wasn't Happy...

1:31:00

We Got An Email About This Sudoku... He Wasn't Happy...
One Of The EASIEST and Most BEAUTIFUL Sudokus Ever

23:59

One Of The EASIEST and Most BEAUTIFUL Sudokus Ever
The Sudoku With Only 16 Given Words Of Rules!

1:07:45

The Sudoku With Only 16 Given Words Of Rules!
The Miracle Sudoku: Rubik's Cube

1:31:10

The Miracle Sudoku: Rubik's Cube
Sudoku on Steroids

5:00

Sudoku on Steroids
Techniques for Starting Hard Sudokus

15:29

Techniques for Starting Hard Sudokus
A Sudoku With Only 8 Given Digits

27:06

A Sudoku With Only 8 Given Digits
This Sudoku Is SO Easy To Enjoy

25:12

This Sudoku Is SO Easy To Enjoy
An Opportunity To Use Sudoku Secrets

38:40

An Opportunity To Use Sudoku Secrets
Things Are REALLY Wrogn In The Sudoku Fogn!

1:39:19

Things Are REALLY Wrogn In The Sudoku Fogn!
This Puzzle Will Literally Create Thousands Of Hours Of Joy

51:49

This Puzzle Will Literally Create Thousands Of Hours Of Joy
Do You Need Theorems To Solve This Sudoku?

49:37

Do You Need Theorems To Solve This Sudoku?
You Won't Believe The Ending Of This Sudoku!

1:00:27

You Won't Believe The Ending Of This Sudoku!
How To Become A Puzzle Grandmaster

58:50

How To Become A Puzzle Grandmaster
The Colours Of Logic

50:22

The Colours Of Logic