Openings Requiring Understanding of Theory



What does it mean when someone says that an opening requires study of theory or understanding of theory before it makes sense. Can someone please give an example of an opening that requires some theory versus one that is purely non-theoretical?
Thanks.
When you say 'opening', I assume that you mean an opening such as the Sicilian, Nimzo-Indian, English, etc.; and NOT an opening move (ie; 1 h3). If so, then openings by definition are theoretical because they deal with a series of moves which are based on certain themes and ideas. And in order to play any opening properly, one must know what its themes and ideas are.
There are 2 ways to learn them:
1. Figure it out yourself (which would take 3 lifetimes)
2. Learn from the work of all the GM's of the past, since they have already done this work for you (a.k.a. STUDYING)
Personally, I prefer the latter since I hate reinventing the wheel.

Well, often times grandmasters can (supposedly) play a game and the first 20 moves will have already be practiced and played out by both camps.
However, often times grandmasters will play very uncommon moves to break off from the main line(s), therefore bringing it more into the realm of theoretical (never really played).
Just a guess, however.

All hypermodern strategies make use of the theory that the center does not necessarily have to be occupied with pieces, but can be attacked from the flanks.
Just a slight adjustment: so called hypermodernism says that the center does not have to occoupied with pawns. Occupying the center with pieces is the exactly what hypermodernism is about. E.g. in the french defense, White pieces occupy d4 and e5 after those squares are vacated by pawns. That way, the Black center is kept under restraint even though no White pawns hold it in place.

Theoretical openings are those openings where there are many, many variations to learn, different themed traps that appear, and you won't have great results if you don't know that stuff and your opponent does. The sicilian defense is a great example of an opening that is very theoretical. A good example of a non-theoretical opening is the classical CaroKann. It's very easy for the uninitiated to follow book lines without ever having seen them.

Right, "theoretical" openings are openings that are a) heavily analysed and b) highly tactical.
Openings like the dragon/najdorf/schveshnikov sicilian, the grunfeld, and the King's Indian are considered theoretical because they are very tactical in nature, one screw up and you're immediately finding yourself worse.
Openings like the Caro-Kann and Queen's Indian are considered "positional" and "easy to learn" because they are less tactical and do not require the same amount of memorization in order to stay alive.
Whichever opening you pick is largely a matter of taste and amount of studytime available. Personally, I used to play the king's gambit and schvesknikov sicilian when I thought I had the time to memorize oodles of lines. Now that I have to work and have to ration my chess studytime, I've switched to the English and the french. They aren't so dependant on tactics and instead focus on positional ideas and knowing where to put the pieces.

"An example of an opening that is crappy and devoid of theoretical considerations would be something like 1. a4 for white."
I don't quite agree. 1. a4 can be used with good effect.

I don't quite agree. 1. a4 can be used with good effect.
...only against players who have no idea what they're doing. 1 e4, 1 d4, 1 c4, and 1 Nf3 are much, much better. 1 a4 is unsound, plain and simple.

"An example of an opening that is crappy and devoid of theoretical considerations would be something like 1. a4 for white."
I don't quite agree. 1. a4 can be used with good effect.
Against 1200 players, yes.




What does it mean when someone says that an opening requires study of theory or understanding of theory before it makes sense. Can someone please give an example of an opening that requires some theory versus one that is purely non-theoretical?
Thanks.