Tutorial # 32 Danger Danger The bug (Unique rectangle)

Tutorial #33 Managing small numbers

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

Unique Rectangles Part 1 / Sudoku Tutorial #20

dxSudoku #56 Hidden Rectangle

BEST SUDOKU Unique Rectangle Video Ever! Advanced Tutorial 11

What is so UNIQUE about the Unique Rectangle?

Triples: the Single Most Important Sudoku technique?

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

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

Sudoku Tutorial #98 The power of triplets and matching pairs.

Extended Unique Rectangles Type 2 - Sudoku Advanced Tutorial 18 (Part 2 of 3)

Empty Rectangle and the LOGIC Behind It

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

Controversial But Useful Sudoku Strategies Unique Rectangles Explained

The Sudoku Trick All Expert Solvers Know

Tutorial 58. Hard sudoku puzzle with lots of techniques.

Tutorial #66 have found many of these lately. Unique rectangle, Danger Danger.

Crack Hard Sudoku Puzzles With the Skyscraper Pattern

Beautiful Relaxing Music - Stop Overthinking, Stress Relief Music, Sleep Music, Calming Music #105