X-Wings and the Rectangle Rule for Solving Medium to Hard Sudoku Puzzles

How To Do Hard Sudokus In 10 Minutes

Techniques for Hard Sudoku

Making a Hard Sudoku really easy

Tutorial #40 A must know technique. NOT a puzzle.

In which I solve an EXTREME SUDOKU for Twitter

Tutorial #50 Solving a hard puzzle from the beginning to the end

Crack Hard Sudoku Puzzles With the Skyscraper Pattern

How to Solve Guardian Sudoku Expert 6621 14 September, 2024

Top Nine Most Often Used Strategies for Solving Expert Sudoku Puzzles

How to Solve a Sudoku Game

Tutorial #56. A difficult puzzle solved from beginning to end. Lots to learn.

Tutorial #80 A difficult sudoku puzzle made easy

Y-wing (XY Wing) - an Advanced Sudoku technique

Solve With Me Hard Sudoku Puzzle: Step By Step New York Times Hard Level

Easy Solving for HARD Level Sudoku Puzzles: Solve With Me

Triplets (a.k.a Triples) and Hidden Triplets Explained - A Sudoku Strategy You MUST Know

A Sudoku Secret to Blow Your Mind - Numberphile

Solve Diabolical Sudoku Puzzles - Very Hard

Improve At Sudoku: What To Do When You Get Stuck