when i play chess i space out

i have really problem that cant concentrate chess.

recently i climbed to 2000 chesstempo. and i learned many things.

but when i play chess i dont think well especially when i wait opponent move.

also in my turn i dont think so much. i just see some moves and move them.

so i tried something (playing against computer because dont need to wait opponent, changing online chess site, playing daily game etc)

how can i more concentrate? or if anyone have experience tell me please.

if i can do that already did.

Funny, what do you say about playing chess apply very much to what I do in tactics. I am forcing myself now in tactics to take much more time to calculate everything well (still not able, but it is already much better than before). 

You are much better rated than me, but I think problems can be rather similar, independent to the rating. Perhaps you should try in daily chess to make notes on things going on on the position, writing down your main ideas. The first thing would be to have a look at the imbalances on the position. We are training this in a club using Silman's book How to Reassess Your Chess. You can join us if you have the book. We have two clubs working with two different editions

This is with the fourth edition:

https://www.chess.com/club/how-to-reassess-your-chess-fourth-edition

And this with the third:

https://www.chess.com/club/how-to-reassess-your-chess-third-edition

Not many people involved, but we are doing our best.