From Dalton Perrine: https://chesschatter.substack.com/p/common-chess-mistakes-by-rating
| Training Priority | Under 1500 | 1500 to 1800 | 1800 to 2000 | 2000+ |
|---|---|---|---|---|
| Fix first | Blunder checking | Blunder checking; time management | Prophylaxis; calculation depth | Consistency; the mental game |
| High payoff | Shallow calculation; king safety | Wrong-moment trades; passive defending | Endgame technique; emotional control | Endgame precision; calculation depth |
| Matters, slower | Passive defending | Pawn breaks; prophylaxis; calculation | Misjudging positions; pawn breaks | Fine-tuning prophylaxis |
| Mostly fixes itself | Weak pawns; piece placement | Piece placement; targeting weaknesses | Wrong-moment trades; time management | Positional polish |
| Low payoff to train now | Endgame theory; positional study | Deep opening theory | Blunder checking; king safety | Basic safety, already solved |