How many years of professional chess coaching is required for a person who is at a level of Elo 1400 to reach a level of Elo 2200? - Quora

Is there a way to get from 1400 Elo to 2000 Elo in chess in 3 months? If there is, what is it? - Quora

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Sonas Proposal - Repairing The FIDE Standard Elo Rating System, PDF, Abstract Strategy Games

Improving at Chess : How I Gained 1000 Rating Points in 7 Months - Simply Curious

Is there a way to get from 1400 Elo to 2000 Elo in chess in 3 months? If there is, what is it? - Quora

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Is blitz chess the hardest?

On reaching a rating of 2000 : r/chess

How many matches are required to decide the winner in chess game out of 683 players? - Quora

Is 1400 on chess.com after 3 months good? - Quora