Before you pay for a coach have you tried following the common advice given to improving players, like avoid over studying chess openings, practice, practice, practice, those tactical skills, and studying middle game play in the beginning? I wouldn't listen to this stuff for a long time but your game will definitely improve by first studying daily tactics on sites like chesstempo.com, then learn from free articles on chess improvement like the study guides here at chess.com, and chessbounty.com. Hope this is valuable to you!
I am searching for a chess coach with some "qualifications". Somebody interested?

Before you pay for a coach have you tried following the common advice given to improving players, like avoid over studying chess openings, practice, practice, practice, those tactical skills, and studying middle game play in the beginning? I wouldn't listen to this stuff for a long time but your game will definitely improve by first studying daily tactics on sites like chesstempo.com, then learn from free articles on chess improvement like the study guides here at chess.com, and chessbounty.com. Hope this is valuable to you!
Thanks, yes, I know these advices, and I am making regularly exercises (tactics and endgames), and trying to go through Nimzowitsch's My System.
Thanks. I think I invested too much already on some openings to change now. For example, I have a quite good understanding of 1.d4 for white. I think I will try to understand better the middlegames which arise in after this move. Until now I just tried to avoid major gaps in my repertoire.
Beside the openings, my major concern is to learn the basics of endgames. This is the part of my game which I really have to improve - I am plying endgames similarly to a 300 points weaker opponent. But I am slowly improving here.