Insights

What millions of games show.

7 findings from 74.2 million games, explained for every level.

Mistake rate after a mistake against otherwise, up to 999 Elo

Does one mistake lead to the next?

of moves are a mistake: in theory, then on the exit (1400–1599 Elo)

of mistakes inside theory lose less than 15 points

mistake rate on the exit: King's Gambit Accepted against Polish Opening

points in 100 games per mistake of 10 to 30 points, from up to 999 to 2200+ Elo

sides stay free of mistakes to half-move 20, up to 999 Elo

Mistakes: very slow against very fast moves, up to 999 Elo

For the most played openings: where theory ends, how risky the first move outside it is, and the most common mistakes inside it, by rating.