I stopped my Sudokus because I had decided finding chains is very little more than trial and error and that wasn't much fun as a puzzle.

But now I'm back and decided differently. The reason is cell region chains.

Although the sudokuexplainer classifies this as a hard technique, I think it is the only way to ID chain patterns and I think is easier to spot than most fishy patterns.

Find a bivalue cell and trace chains from both values and you'd be surprised how easy it becomes to find eliminations.

Look for cells claiming more than one conjugate pair. Or look for the almost locked sets and see what bivalue will lock the set.

BTW here's my method of play. I don't write in the candidates, my pencil marks are just dots in the obvious part of the cell to show what number it is.

First thing to do is eliminate with intersections and sets. The intersections should be possible without making pencil marks. Then make the pencil marks one number at a time. This way if you're patient you can easily spot the conjugate pairs and more intersections.

Once you done this use a felt tip marker to mark the bivalue cells and use the pencil to draw a square or box around the cojugate pair numbers.

Good luck and I hope those frustrated with chains give my method a go. At least you will be more pattern-identifying then just picking random numbers. Regional chains using bivalues and looking for ALS's in them is definitely easier for me than any of the fishy patterns. At least for my method of solving.