Maximum Rating knowing none openings?

How high in rating can be achieved without knowing any off chess openings but just the principles: try to dominate the centre of the board and protect pieces but give them space to move etc...? What is your rough estimate and opinion?

Bit ambiguous really. Memorising opening moves doesn't necessarily benefit you that much but understanding opening play is much more important especially at our level. I have been up to about 1350 in blitz but i reckon you could get much much higher than that without knowing opening lines. But understanding the prospects of certain openings and how to defend against them is important.

Might be wrong someone higher rated will comment surely.

ok, hope so. My problem is too that I don't remeber is the names of the different openings. I have tried few, but not success. I allways start 1.e4 and I don't even know name of it.

For me it would be much easier if the naming system is numerically:

Opening 1.

Opening 2.

.

.

Opening n.

And then the different variations are numbered:

Opening 1.1

Opening 1.1.3

Opening 1.2

Opening 2.2

.

And so on...Then studing opening would be much easier. If you are interested Opening number x, then you can study it deeper by learning openings x.1, x.2, x.3 and x.1.1 and so on...Or is it somewhere used this kind of notation for openings?

The move 1. e4 is referred to as the King's Pawn Game.

Minimally around class C in USCF, maybe 1500 on here in blitz. So long as you reach a playable middle game openings mean far less at the lower levels than higher as the gaps in ability and knowledge is varying and unpredictable leading to at any stage of the game a critical mistake or blunder giving the losing side a chance to get back in the game or turn the tables. Usually if you stick to several opening choices and play them often you slowly learn the ins and outs of that general opening line which can help too. If I were a beginner i'd pick several opening moves, like 1.d4 or 1.e4 as white and 1. d5 or 1.e5 as black and play them constantly and slowly familiarize myself with those openings and resulting positions as I play games while focusing my study time on tactics and endgames with annotated master games of those openings to get ideas from them.

Having knowledge about opening theory can be helpful, but it won't guarantee a high rating or anything special.

Yee, thnx! This page looks very handy: http://www.365chess.com/eco.php There is tree structure. Maybe I start little study there.

Ok, easy to remember the first move's name. I tried once read book and soon there where ten's of name for different's kinds of openings. Spanish, sisilian, Press, ..., I got confused and lost my interestng. And that http://www.365chess.com/eco.php page would be much more handy if there were pictures of any situations (there is some). I have not even learned the notations a,b,c,...,h * 1,2,3,...,8. I can't play blind chess.

Try https://gameknot.com/chess-opening/. It will give you the names and ECO codes of the openings as you move the pieces on the board.

not sure if this helps, but i struggle learning openings and all the book sort of stuff: just not how my mind works. so for me what has helped my meager increases in rating has been studying tactics/problems. i know a couple openings, know mostly how to respond to openings (mainly avoiding disaster) but where i make a difference is looking for patterns on the board that are similar to what i've seen with chess problems. i highly recommend the book "tactics time" as it has 1000 problems that i guarantee you if you do all you will see a difference in your play. they have a second volume that i'm half way through. all i have learned about ratings is that you have to beat better players to slowly rise, and, you have to keep winning. no secret there, good luck

Bigger thnx! Now I start stdudying openings...little perhaps.

Interesting https://fi.wikipedia.org/wiki/Jos%C3%A9_Ra%C3%BAl_Capablanca

I recommend you to watch some videos on youtube about different openings... I think learning openings is not just memorizing the moves.. It is more than that.. I love watching videos of GM Varuzan Akobian on Youtube!! (Just search the name on youtube and you will see the lectures of him.. there are a lot and they are simply brilliant!!) 
Another small advise if you like - try to familiarize the names of the squares on the chessboard (notation).. It is not essential but it is easier to communicate with it.. :) 

Ok, maybe I watch Youtube videos...tomorrow. Those notations: difficult! if you say "g1" I have to count by fingers: a=1, b=2, c=3, d=4, e=5, f=6, g=7 - ok, g1 is a white Knight and g8 is a black knight in start position because 8 is the last column for Rook. "g5" means hebrea for me: it is somewhere in a middle of a board.

This is a rather contradicting question.

Most openings are based on the principles in combination with some traps and some plans.

So if you follow the basic principles, try to do every time the move you think is the best and don't fall the same trap more then once. You will eventualy end up playing the same lines and without knowing the names of the openings playing some variation of a standard opening.

When I was in university there where those 2 guys playing every day chess and they played more or less every time the same opening with some small variations. That is how the human mind works.

If you don't want to study openings but you keep your first move the same you will end up studying as you play.

You will get used to it gradually.. I had the same problem in the past.. but when you get more familiar to the chessboard, you will eventually find it much easier... Tip - use a board with a,b,c,..,h & 1,2,3,...,8 printed on it.. When you play online on this site, you can always have those numbers and letters printed on the board..

ok, but that can makes playing little dull at the beginnging: always the same routines and movements. Or not? After some time there is always a totally new situation, at least after ten moves.

niver herda the None Opening

That is the funny part about it.

Every piece has it own fields and in the end you find on which fields you like the pieces best. The knight on b1 can go to c3 d2 or a3 and after several games you will find which field will give you the most and in the end 9 out of 10 the piece will go to this field.

Some moves are not so important and the order can change but you will find that 9 out of 10 times you will get with different move orders to the same position.

In every chess game you have moves that are powerfull so if you know such a move can come you will descide to prevent it or to defend it. After playing several games trying several options you start to have a favourite way to deal with the situation and 9 out of 10 times the game will go this way.

So you will put your pieces on your favourite fields and get so your favourite positions and in thos positions you will handle the threats and the possible attacks the way you like the best. So in the end you will get the same lines over and over again.

i got difficultiees in your languages yankees, but I bet I write better english than you finnish.