re: Poker & Am I right in thinking that you have more equity against a wider range than tighter?
As senormath said, yes. You are right.
When playing vs. players who open wider, you also need to try to see if there is any reason for them to be doing this. Some players will widen their range when being first in as position moves toward BTN. Blinds will 3 bet wider when late positions open. But, some players open wide, 3bet wide, just cause "it is fun to bet". You should always try to keep the reasons behind a perceived range (in villains mind, his reason) in your mind.
I hope I said that right.....