The Sudoku BUG Problem and the BUG +1 Solution: A Subset to Uniqueness

Solve a HARD Level Sudoku the EASY way! X wing, W wing, XY wing, and even a BUG +1

Empty Rectangle and the LOGIC Behind It

Lots of TRIPLES! Useful Sudoku Strategy - Great for Beginners to Know

W-W-What's a W Wing?!! Discover this SIMPLE yet Powerful strategy for Hard puzzles

What is so UNIQUE about the Unique Rectangle?

Easy Solving for HARD Level Sudoku Puzzles: Solve With Me

The Most Under-Used Sudoku Technique

Sudoku 2-String Kite Explained with EXAMPLES

Why Phistomefel's Ring is BRILLIANT and Why it Works

Hard Sudoku Puzzle Made Easy: Solve With Me

BUG +1 Revealed! / Sudoku Tutorial #22

The XY Wing a.k.a. the Y Wing: A Useful Sudoku Solving Technique When You Are STUCK !!!

Hard Level Sudoku Puzzle Made EASY with Skyscraper and a 2 String Kite!!!

Tutorial #78 Sudoku. The Bug +1

Lesson 4. Learn Sudoku. Very Important hints.

Kuis IQ Seru untuk si Genius yang Eksentrik

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

Solving a Hard Level Sudoku Puzzle with Skyscraper Swordfish AND Forced Chains!!!

Unique Rectangles Part 1 / Sudoku Tutorial #20

Tutorial # 32 Danger Danger The bug (Unique rectangle)