ELO Rating

ELO Rating is a system used to measure a player’s skill level in competitive activities like chess. It updates a player’s score based on game results, considering the expected outcome given both players' ratings. If a player performs better than expected, their rating increases; if they do worse, it decreases. The system helps compare players fairly over time, reflecting improvements or declines in skill. It's widely used because it dynamically adjusts to ongoing performance, providing a clear, numerical way to gauge and compare participants' abilities.