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

eswc2017-question-answering/resources/properties_with_labels.txt at master · UKPLab/eswc2017-question-answering · GitHub

On reaching a rating of 2000 : r/chess

How Long Does it Take to Reach 1000 Elo? - Nikhil Dixit

My rating in chess is 1200 but I am able to defeat players of rating 1800-2000. So do I need to learn chess tactics? - Quora

How long does it normally take for a player to go from elo 1800 to elo 2200? - Chess Forums

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

Being a 1200 ELO rated player at the age of 30, can I become a GM in the next 5 years? - Quora

Eveosev/week-06/day-01/Reviews_statistics.csv at master · green-fox-academy/Eveosev · GitHub

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