Sudoku Primer 114 - ambiguity rule (Unique Rectangle) examples
Sudoku Primer 86 - Solving a diabolical puzzle (pseudo-quiz) (sudoku tutorial, sudoku rules)
Sudoku Primer 328 - Unique Rectangles Help Solve a Diabolical Puzzle
Sudoku Primer 102 - combinations of tricks to solve a diabolical puzzle
Sudoku Primer 189 - Look for Leftovers While Solving Sudoku
Sudoku Primer 172 - 4 Sudoku Tricks to Find One Number and Break Open the Puzzle
Sudoku Primer 183 - Using Four Sudoku Tricks to Find One Number
Sudoku Primer 113 - unidentified twins
Sudoku Primer 101 - pop quiz solving a medium puzzle (using some harder techniques)
Sudoku Primer 174 - Sudoku #atHome, Sudoku #withMe - Learn how to Solve Sudoku Puzzles
Sudoku Primer 294 - A Spontaneous Solve of a Diabolical Puzzle
Sudoku Primer 339 - a Diagonal, a Plus Pattern and URs
Sudoku Primer 182 - Identical Twins and the Ambiguity Rule Get Us Through this Sudoku Puzzle
Secrets to help crack hard sudokus
SudokuPrimer 1 - Row completion & finding twins
Sudoku Primer 139 - TidBits - Unique Rectangles or Ambiguity Rule
Sudoku Primer 314 - Look for Common Rows & Columns
Sudoku Primer 78 - in-depth look at loner cells (sudoku benefits)
Sudoku Primer 187 - Getting Past Three Hard Spots in this Puzzle
Sudoku Primer 251 - Five Techniques needed to Find One Number
