UKD Rating Calculator

The national rating system of the Turkish Chess Federation.

We've launched a new version! You can visit the old version to access your saved tournaments. Go to Old Version

K-Factor

Rating'inize göre otomatik: <1300→30 · ≥1300→25 · ≥1600→20 · ≥2000→15 · ≥2400→10

Player Name

Player UKD

No UKD

About This Calculator

This calculator estimates rating changes based on the Turkish Chess Federation's UKD rating logic. Enter your current UKD, opponent details, and match results to see your estimated post-tournament rating change. Results are estimates; official UKD ratings are determined by TSF processes.

For Unrated Players

If you don't have a UKD rating, the system calculates an estimated GKD / performance rating based on your rated opponents and results. This is not an official UKD rating. Unrated opponents are included in the tournament score but not in the GKD calculation.

How UKD Rating Works

Expected Score:

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

New UKD:

R'_a = R_a + K × (S - E)

The Turkish Chess Federation uses K=40 for new players (under 30 games), K=20 for players rated below 2400, and K=10 for players rated 2400+.

Save & Share

Saved tournaments are stored only in this browser. Share links are saved on the server so others can view your result. My Shared Links only shows links created from this browser.