Facing irregular or uncommon openings How do you deal with this? I'm a bit of a chess perfectionist, and I always want to play the best move, so when I go up against an irregular opening, I don't do badly, but it's hard be 100% sure you made the best move in the opening, and that really bothers me psychologically.

My current method for dealing with these types of situations is to just follow the basic opening principles, but at my level I feel like this is not detailed enough or too vague, since I always try to strive for a certain level of understanding in every position. What can I do to be more flexible in this area of chess? Are there more detailed guides for playing against uncommon openings?

Even though I don't necessarily play badly, I really want to learn to be "comfortable" in all positions. How would I achieve this? Is the answer to play beginners since they tend to play strange openings all the time? I've already done this, but I still don't seem "comfortable" enough. Maybe its all in my head?
What you describe is the best advice to meeting an unusual opening: play by the principles.

In terms of resources, there are 2 I can think of:


Beating Unusual Chess Openings by IM Richard Palliser. By 'unusual', Palliser really means anything other than 1. e4 or 1. d4, so he covers from Black's point of view: 



  The respectable (English Opening, Reti and King s Indian Attack) through to the offbeat (Nimzo-Larsen Attack, Bird s Opening) and the totally bizarre (Orang-utan, Grob)



Chess.SE. We are always happy to see questions such as What are the ideas behind the Blackmar-Diemer gambit?