Originally posted by Paul Leggett
I read somewhere (and I wish I could remember to give credit) that the essence of winning chess is to create two threats, both of which cannot be answered at the same time.
I think that is also the essence of that is meant when it is said that, for an endgame to be won, there must be two weaknesses for you to exploit.
It's modern math- two equals won!
It's one of Purdy's fundamental principles, mentioned in his "Guide to Good Chess" (and maybe elsewhere? ).
It's also Reuben Fine's 6th middlegame rule (Chess the Easy Way) .
And who knows, maybe many others preach this. (Probably everyone who's written on tactics or combinations.)
Edit - Hmm, when I make edits, I no longer see the edit info saying how many edits I've done. What's up with that?