Awesome.
What was the opening that you mastered? I know many titled players out here who'd be reluctant to say they "mastered" an opening ... so curious! :)
Also, what time control did you play most of your games in?
Improving opening repertoire
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I just decided to try a new opening and without studying it, I somehow mastered it after a period of time without ANY kind of video, book, or audio help. How did I do this? It seems odd to me