How can I improve???

How can I improve???

JRGILKINSON
JRGILKINSON
Dec 6, 2017, 7:45 PM |
2

I have been playing my whole life. At 30 min games, I am 1150-1250 ish. I have played over 400 games online and I don't get better. I know it seems like a lame question, but...HELP!!!