[InfiniteBox]

Thanks for the advice! So I invented a faster way to learn chess. The solution was simple: I found necessary conditions for various chess blunders and trained myself to recognize them during play.

Here's a simple proof: https://docs.google.com/document/d/13unaqOo02sA4kiBFayoQ01CS...

I shared the technique with a friend, and he doubled his chess skill within 10 hours of training. That is, he went from better than 35% of players to better than 70%.