Kent, you might try searching and reading the forum more rather than simply asking. You're holding a dictionary and asking how to spell crysanthimum, er, crisantimum, uh... posey.
First, Mike Barker went to great effort to make a nice post that links to lots of good stuff
here.
Second, to search the forum, you can use the search command at the top of the page, however, a more useful search can be done by going to GOOGLE, clicking on ADVANCED SEARCH, type in SUDOKU.COM in the DOMAIN area of the form and FORCING CHAINS in the EXACT PHRASE area.
Click here to see these results.There is no royal road. No one can tell you where to look for this or any other tactic -- nor is there anyway of knowing if a tactic will help in a particular position without testing -- regardless if you're talking about naked pairs or complex, comprehensive forcing chains. We can describe *what* the patterns are -- but *how* could I tell you how to find a hidden triple?
Kent: "Where are my keys?"
Player's Forum: "I found them under the couch."
Kent "Could you explain to me how to find my keys in the future and how to know to look for them under the couch?"