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US

USCF

O sistema de rating oficial da Federação de Xadrez dos Estados Unidos.

Automatically import your Chess-Results.com tournament games into ELO, FIDE, UKD, USCF, DWZ and other rating calculators. Importar do Chess-Results
Games imported from Chess-Results.com. Review ratings before calculating. Importar do Chess-Results
Unrated player calculation is only available in tournament mode. Switch to tournament mode and enter at least 4 games.
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Sobre esta calculadora

This tool provides a simplified ELO-based preliminary calculation for USCF rating changes. The official USCF system may include Glicko-based calculations, bonus points, rating floors, and special rules. The value shown may differ from the official USCF record.

Para jogadores sem USCF

For players without a USCF rating, the tool calculates an estimated initial rating using results against rated opponents throughout the tournament: R = Opponent Average + ((Wins − Losses) / Games) × 400. This calculation requires at least 4 games. The official starting rating is determined by US Chess rules on valid game count, provisional rating, bonuses, and other evaluation criteria.

Como funciona o rating USCF

Pontuação esperada:

E = 1 / (1 + 10^((Rb - Ra) / 400))

Novo rating:

R'a = Ra + K × (S - E)

Simplified K factors: K=32 under 2100, K=24 for 2100-2400, K=16 from 2400.

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