Sudoku How-To Training -- Sudoku Video Index


This page has a list of sudoku training videos cross-referenced with the techniques found in each video. More videos are added all the time.

Click on the video number to go to that video.

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Video #

Technique(s)

198

Twins
Ghost numbers
Unique rectangles
Double column elimination
Gate pattern
Corner pattern
T pattern

197

Double row/column elimination
Twins
Triplets

196

Diagonal pattern
Twins
Hidden corner pattern

195

Twins

194

Sudoku history
Magic square
Latin square
Howard Garns
Leonhard Euler
Wayne Gould

193

Ambiguity rule
Double row/column elimination
Ghost numbers
Twins
Triplets
T pattern
Corner pattern

192

Answer sheet to pop quiz video 191

191

Pop quiz

190

Opposite pattern

189

Ghost numbers
double row/column elimination
Twins
Triplets

188

Wall pattern
Hidden T pattern
Twins
Triplets
Ghost numbers

187

Quadruplets
Twins
triplets
Ghost numbers
Ambiguity rule (Unique Rectangles)
Double row/column elimination

186

Double row/column elimination
Twins
Ghost numbers
Ambiguity rule (Unique Rectangles)

185

Row/box relationships
Ghost numbers
Twins
Unique rectangles
Row/column completion

184

identical twins
Row/column completion
Plus pattern
Solving sections

183

Four techniques find one number
Twins
Double row elimination
Quadruplets

182

Identical twins
Ambiguity rule (unique rectangles)

181

Diagonal pattern
Hidden patterns
Corner pattern
Gate pattern
Double row elimination
Double column elimination
Ambiguity rule
Row & column completion





Video #

Technique(s)

180

Will Shortz "Very Challenging" puzzle

179

Lots of twins
Learn a lot about twins in this video

178

A "beautiful puzzle"
Double wall pattern
Twins
Triplets
Double row elimination
Row/column completion
Ambiguity rule (Unique Rectangles)

177

Twins
Triplets
Double column elimination
T pattern
Hidden patterns
Ghost numbers
Ambiguity rule (Unique rectangles)
Solving rows
Solving columns

176

Solving sections
Double row elimination
Wall pattern
Ghost numbers
Triplets

175

Ghost numbers
Double row elimination
Ambiguity rule
Sudoku twins

174

Medium puzzle
Getting started with sudoku
Sudoku rules
Sudoku basics
Basic techniques

173

Opposite pattern
Corner pattern
Plus pattern
Hidden patterns
Twins
Triplets
Ghost numbers
Unique rectangles (Ambiguity rule)

172

Four tricks used at the same time to solve 1 number
Twins
Triplets
Ambiguity Rule (Unique Rectangles)
Ghost Numbers
Double Column Elimination

171

Twins
Ghost numbers
T pattern
Gate pattern
Corner pattern

170

Double row elimination
Twins
Triplets
Ghost numbers
Solving sections
Solving rows
Solving columns
Solving boxes

169

Twins
Sudoku unique rectangles (ambiguity rule)
Ghost numbers
Double column elimination

168

Double row & column elimination
Ghost numbers
Twins
Row & column completion
Ambiguity rule (sudoku unique rectangles)

167

Ghost numbers
Twins
Row & column completion
Double row & column elimination
Ambiguity rule (Unique rectangles
T pattern

166

Patterns
Hidden patterns
Advanced techniques

165

Opposite pattern
Plus pattern
Corner pattern
Double row & column elimination

164

Answer sheet for pop quiz in previous video (video 163)

163

Sudoku pop quiz
Unique rectangles (ambiguity rule)

162

Ghost numbers and how to find other numbers using them

161

Hidden triplets





Video #

Technique(s)

160

Plus pattern
Unique rectangles (ambiguity rule)
Twins, triplets

159

Incredible power of twins
Unique rectangles
Loner cells
Identical twins

158

Answer sheet to pop quiz
Ambiguity rule (sudoku unique rectangles)
Sudoku twins, triplets
Sudoku row & column completion
Solving sections

157

Pop quiz
Ambiguity rule (sudoku unique rectangles)
Sudoku twins, triplets
Sudoku row & column completion
Solving sections

156

Sudoku unique rectangles
Sudoku twins
Double row & column elimination
Sudoku solving sections

155

Sudoku trial & error technique

154

T pattern

153

Answer sheet for pop quiz in video #152

152

Pop quiz -- see if you know each number as they are filled in

151

Patterns

150

Diagonal pattern
Corner pattern

149

Ghost numbers
Twins
Triplets
Loner cells
Identical twins

148

Diagonal sudoku
A sudoku variant

147

Forget patterns! Part 2
Looking for numbers without looking at patterns
Medium puzzle

146

Subscriber requested puzzle

145

Forget patterns! Part 1
Looking for numbers without looking at patterns
Diabolical puzzle

144

Pattern: The Corner pattern
Hard puzzle

143

Answer sheet to video 142
Difficult puzzle

142

Pop-quiz
Difficult puzzle

141

Pattern: The L pattern
Hard puzzle





Video #

Technique(s)

140

Pattern: The Gate pattern
Hard puzzle

139

Short video
Ambiguity rule (unique rectangles)
Hard puzzle

138

Subscriber request
Hard puzzle

137

Subscriber request
Diabolical puzzle

136

Pseudo-quiz
Diabolical puzzle

135

Watch for subtle clues
Diabolical puzzle
Twins, triplets
Ambiguity rule
Double row/column elimination

134

Answer sheet to video 133
Diabolical puzzle

133

Pop-quiz
Diabolical puzzle

132

Answer sheet to video 131
Hard puzzle
Quadruplets

131

Pop-quiz
Hard puzzle

130

4x4 sudoku
Sudoku for kids

129

Sudoku variant
Diagonal sudoku

128

Answer sheet to video 118

127

Pop-quiz
Medium puzzle

126

Diabolical puzzle
What-if technique

125

Diabolical puzzle
Twins
Identical Twins

124

Hard puzzle
Double row elimination
Double column elimination

123

1-9 sudoku -or- Between 1 & 9 sudoku

122

Puzzle by Nikoli Publishing
Expert/Difficult

121

Charles Timmerman
Hard puzzle





Video #

Technique(s)

120

Killer sudoku (Latin square)

119

Answer sheet to video 118

118

Pop Quiz
Diabolical puzzle

117

Subscriber request
Diabolical puzzle
Ambiguity rule (Unique rectangles)

116

Diabolical puzzle
Hidden patterns

115

Hard puzzle
Twins & Triplets
Quick scanning for numbers

114

Hard puzzle
Ambiguity rule (Unique Rectangles)

113

Hard puzzle
Unidentified twins

112

Answer sheet for video 111
Expert puzzle

111

Pop-quiz
Expert puzzle

110

Another way to use twins
Diabolical puzzle

109

Subscriber request
Expert puzzle

108

Creatively using twins

107

Answer sheet for video 106
medium puzzle

106

Pop-quiz
medium puzzle

105

Subscriber requested
Tips for solving an easy puzzle

104

Solving tips for hard puzzle
Diagonal pattern

103

Answer sheet to video 101

102

Subscriber request
Using combinations of tricks to solve

101

Pop-quiz





Video #

Technique(s)

100

Triplets
Wall pattern
T pattern

99

Wordoku (sudoku with letters instead of numbers)

98

Proof that sudoku doesn't require math to solve
Wordoku (sudoku with letters instead of numbers)

97

Ambiguity rule (Unique Rectangles)
Twins/triplets
Ghost numbers
corner sidewalk pattern

96

Answer sheet for video #95
Quadruplets example

95

Pop-quiz solving a hard puzzle

94

The "Plus" pattern

93

Thought processes solving a puzzle

92

diabolical puzzle - answer sheet to previous pop-quiz

91

diabolical puzzle - pop-quiz

90

Answer sheet for SudokuPrimer video 89

89

pop-quiz solving a hard puzzle
See next video for answer sheet

88

pop-quiz solving a medium puzzle

87

Offset pattern
row/column completion

86

Pseudo-quiz
twins
ghost numbers
double-row elimination

85

Extreme diabolical puzzle solved
Daily Telegraph 5/18/2018
What-if strategy

84

'Answer sheet' to pop-quiz in SudokuPrimer 83 video

83

Hard puzzle
Pop-quiz

82

Diabolical puzzle
Pop-quiz
Quadruplets

81

In-depth look at L patterns





Video #

Technique(s)

80

Ambiguity rule

79

Subscriber request
"Hardest sudoku we've seen in a newspaper"
Daily Telegraph puzzle 27 April 2018

78

In-depth look at loner cells
Twins, triplets
Solving sections

77

Subscriber request
Loner cells
Twins, triplets
Offset pattern

76

Pop-quiz

75

L pattern

74

Twins
Triplets

73

The "wall guarantee"

72

Speed-scanning
Twins
Triplets

71

Medium puzzle
Sudoku terminology - cells, rows, columns, boxes, sections, containers
Ghost numbers
Twins

70

Easy puzzle
Basic strategies
Row, column, box completion
Solving sections

69

Diabolical puzzle
Pseudo-quiz

68

Hard puzzle
Pop-quiz

67

Diabolical puzzle
Pop-quiz

66

Diabolical puzzle
Plus pattern
Solving sections

65

Hard puzzle
Wall pattern

64

Medium puzzle - Sudoku To Go vol 103
Row, Column, Box completion
Corner sidewalk pattern

63

Easy puzzle - Sudoku To Go vol 103
Row, Column, Box completion
Diagonal pattern
Plus pattern

62

Tricks to make a hard puzzle easy
Using twins & Triplets to get a good start

61

Pop-quiz
See if you can follow along





Video #

Technique(s)

60

Extreme diabolical puzzle solved
Daily Telegraph 9/22/2018
Trial & Error

59

Rotten to the core
I fill in numbers, you discover why

58

Pseudo-quiz
Solving a hard puzzle
L pattern, wall pattern

57

Using harder tricks in a medium puzzle
Ambiguity rule
X pattern

56

Finding twins
two things you can do with twins

55

easy puzzle
solving single cells
row, column, square completion

54

pop-quiz solving a medium puzzle
harder techniques are used to solve this medium puzzle

53

using advanced tricks to solve an easy puzzle

52

some twins, but mostly "chipping away" at a hard puzzle using simpler techniques

51

easy puzzle Pop-quiz
see if you know why numbers go where they go

50

Pseudo-quiz hard puzzle - why does that number go there?

49

Pseudo-quiz diabolical puzzle - why does that number go there?

48

Pseudo-quiz medium puzzle - why does that number go there?

47

diabolical puzzle - Sudoku to Go volume 102

46

hard puzzle - Sudoku to Go volume 102

45

medium puzzle - Sudoku to Go volume 102

44

easy puzzle - Sudoku to Go volume 102

43

wall pattern
corner sidewalk pattern
hidden patterns

42

offset pattern
corner sidewalk pattern

41

hard puzzle pop quiz
see if you know why numbers go where they go





Video #

Technique(s)

40

medium puzzle pop quiz
see if you know why numbers go where they go

39

finding sets (twins, triplets, etc.) quickly

38

Harold Nolte, video creator introduction

37

conversely - looking at opposites

36

twins
triplets

35

diabolical puzzle - Sudoku to Go volume 101

34

hard puzzle - Sudoku to Go volume 101

33

medium puzzle - Sudoku to Go volume 101

32

easy puzzle - Sudoku to Go volume 101

31

gate patterns
wall patterns
offset patterns

30

loner cells
identical twins

29

containers defined
container examples

28

twins, triplets, quadruplets up to nonuplets

27

twins twins twins

26

quadruplets
individual cells

25

diabolical puzzle - Sudoku to Go volume 100

24

hard puzzle - Sudoku to Go volume 100

23

medium puzzle - Sudoku to Go volume 100

22

easy puzzle - Sudoku to Go volume 100

21

combinations of techniques to solve a diabolical puzzle





Video #

Technique(s)

20

'T' pattern
finding twins and triplets quickly

19

hard puzzle - Sudoku to Go volume 99

18

diabolical puzzle - Sudoku to Go volume 99

17

medium puzzle - Sudoku to Go volume 99

16

easy puzzle - Sudoku to Go volume 99

15

diabolical puzzle - Sudoku to Go volume 98

14

medium puzzle - Sudoku to Go volume 98

13

easy puzzle - Sudoku to Go volume 98

12

hard puzzle - Sudoku to Go volume 98

11

Sudoku to Go magazines

10

solving an entire diabolical puzzle

9

solving columns using twins

8

twins, triplets
number/container relationships

7

ghost numbers

6

loner cells
identical twins

5

double row/col elimination

4

finding numbers after twins/triplets

3

finding numbers after twins

2

loner cells
identical twins

1

row completion
finding twins

0

Introduction to sudoku
Sudoku terminology
Basic sudoku rules
How to solve an easy puzzle





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