Advanced Sudoku Techniques

Lesson 13 There is only one place it can go

Lesson 14. Matching pairs advanced

Lesson 15. 3 empty cells in a row within a block

Lesson 16. The Walking stick

Lesson 17. The Capital T

Lesson 18. The amazing 3X3

Lesson 19. Advanced TMB LCR

Lesson 20. The cleaver, Mallet Table, and the Diagonal cross pattern

Lesson 21. The Xwing plus scenarios

Lesson 22. Review scenarios and the skyscraper pattern

Lesson 23. Review. The swordfish pattern

Lesson 24. When all else fails #1. Using a matching pair

Lesson 25. When all else fails. #2. The underlined pair.