The New Sudoku Players' Forum

[Yogi]

The best videos I've seen are Sudoku Swami's Complete Course. For a Learner like me they are best viewed in numerical order.

[AnotherLife]

Can you refer me to a video or explanation with screenshots so I will understand better how these chains work?

Hi Dr-shaw,
I think it will be useful for you to visit HoDoKu website that provides information in teachable format on many methods used in sudoku. There you can find various examples of chains. You can also download HoDoKu solver to be able to solve your puzzle. Good luck!