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What is UKD Rating? How is it Calculated? 2026 Guide

FIDE Robotu · 29.03.2026 · 18 min read
rehberukdratingtsfsatrancturnuvaulusal-kuvvet-derecesi
What is UKD Rating? How is it Calculated? 2026 Guide
Players competing in a chess tournament - UKD rating guide
The UKD rating is of great importance for every chess tournament player in Turkey.

The first term everyone who participates in chess tournaments in Turkey encounters is the UKD rating. So, what is UKD, how is it calculated, and how do you get your first UKD rating? In this guide, from the perspective of a chess coach and FIDE arbiter, we explain all the details of the UKD system, the calculation formula, the K-factor, and strategies for increasing your rating step by step.

📋 Contents
  1. What Is UKD (National Strength Rating)?
  2. Differences Between UKD and FIDE ELO
  3. How to Get a UKD Rating? (Step by Step — License, Visa, e-Government)
  4. UKD Calculation Formula
  5. K-Factor (Development Coefficient)
  6. Detailed Calculation Examples
  7. UKD Level Table
  8. UKD Update Process
  9. How to Improve Your UKD Rating?
  10. Age Categories
  11. UKD Rating Inquiry
  12. Frequently Asked Questions (FAQ)

What Is UKD (National Strength Rating)?

UKD is the abbreviation of Ulusal Kuvvet Derecesi (National Strength Rating). It is the national rating system managed by the Turkish Chess Federation (TSF) that measures the strength level of chess players in Turkey. It can be thought of as Turkey's own equivalent of the global FIDE ELO system.

🏛️ Governing Body
TSF (Turkish Chess Federation)
🇹🇷 Validity
Turkey only
📊 Basis
Elo Rating System
📅 Update
The 1st of every month

The UKD system is based on the Elo rating methodology developed by Hungarian-born American physics professor Arpad Elo. The basic principle is simple: if you defeat a strong opponent, you gain many points; if you lose to a weak opponent, you lose many points.

🎓 Coach's Note: The UKD rating is the starting point of your chess journey in Turkey. Most Turkish chess players first obtain a UKD rating, then acquire a FIDE ELO rating by participating in international tournaments. The two systems are independent of each other, and you can have both at the same time.

id="ukd-fide-fark">Differences Between UKD and FIDE ELO

In Turkey, someone who plays chess is often confused by the question "UKD or ELO?". Here are the main differences between the two systems:

Feature UKD (National) FIDE ELO (International)
Governing Organization TSF (Turkish Chess Federation) FIDE (World Chess Federation)
Scope of Validity Only in Turkey Worldwide (200+ countries)
Counted Tournaments TSF-approved domestic tournaments FIDE-approved international tournaments
Update Frequency 1st of every month 1st of every month (also updated daily)
License Requirement TSF athlete license FIDE ID + TSF license
Title Validity National classification (1st, 2nd, 3rd category) International titles (GM, IM, FM, CM)
Initial Rating Requirement At least 5-9 games against rated UKD players At least 5 FIDE-rated games
Lookup ukd.tsf.org.tr fideidsorgulama.com
⚖️ Arbiter's Note: A tournament can be both UKD-rated and FIDE-rated at the same time. In this case, the games you play update both systems. The tournament announcement will always specify "FIDE-rated" and/or "UKD-rated." As arbiters, when reporting the tournament, we send separate reports to each system.

Important: The same player's UKD rating and FIDE ELO rating may be different. The reason is that the two systems are based on different player pools and tournaments. In general, for strong players the two ratings are close to each other; however, at lower levels, UKD tends to be higher than FIDE ELO.

How to Get a UKD Rating? (Step by Step)

TSF license application - preparing documents for chess tournament registration
To obtain a UKD rating, you must first get a TSF athlete license.

Getting your first UKD rating is easier than you think. Here is the step-by-step process:

1

Obtain a TSF Athlete License

The first step is to obtain an athlete license from the Turkish Chess Federation. The documents required for first-time applicants are:

  • Medical Report (a referral can be created via e-Government)
  • Parental Consent Form (for athletes under 18 — can be created via e-Government, no physical printout required)
  • 1 Photograph
  • For a club license: an approved document showing affiliation with the club

The license process is completed by submitting the prepared documents to the Provincial or District Directorates of Youth and Sports.

2

Complete the Visa Procedure (Every Season)

You must have your license validated every season. The required documents for validation are:

  • Medical Report
  • Parental Consent Form (for those under 18)
  • For club validation: a document showing affiliation with the club
  • Validation fee receipt: ₺305.00 must be deposited into the TSF license account (IBAN: TR82 0006 4000 0014 2005 9308 38). The receipt description must include the Turkish ID number and full name.

Those exempt from the validation fee: children of martyrs, those staying in Love Homes and Children's Homes, those with a disability report of 40% or more, and athletes over the age of 65. In addition, students under 18 (not yet turned 19) obtaining a license through a school sports club are entitled to free licensing and validation upon presenting a student certificate.

3
4

Play At Least 5-9 Rated Games

In order for your first UKD rating to be calculated, you need to play a sufficient number of rated games. Generally, 5 to 9 games are enough. Your opponents' current UKD ratings in these games are used to calculate your first rating.

Attention: It is mandatory that all players in the tournament have a valid TSF license. Tournaments that include unlicensed players are not included in UKD calculation.

5

Get Your First UKD Rating

Tournament results are reported to TSF by the provincial representative, and your first UKD rating is calculated according to your performance rating. This calculation takes the following into account:

  • Your opponents' current UKD ratings
  • Your game results (win, draw, loss)
  • Your estimated strength level based on the performance formula

Your first rating will appear in the updated UKD list on the 1st of the following month.

Creating a Health Report Referral via E-Government

  1. Log in to E-Government → Type "Sports Information System" in the search bar
  2. Click "Sports Information System" → Select "Go to Application"
  3. Click "Health Procedures" → "Referral for Health Report"
  4. If you will create a referral for a person under your custody, click "Switch to the person under my custody"
  5. Enter the Turkish ID number and date of birth → "Complete Transition"
  6. "Create New Referral" → Select province → Click "Add Health Referral"

Note: After creating the referral, you can obtain the health report from a healthcare institution in any province, regardless of the province selected. The referral request you create is valid for 6 months.

Creating a Parental Consent Document via E-Government (Under 18)

  1. Log in to E-Government → Type "Sports Information System" in the search bar
  2. Click "Sports Information System" → Select "Go to Application"
  3. Click "Declaration/Permission Procedures" → "Parental Consent"
  4. "Go to the Person Under My Custody" → Enter Turkish ID and date of birth → "Complete Transition"
  5. Click "New Application"
  6. Under "Permission Type", select "License/Sports Card"
  7. Make your selection under "Transaction to Be Authorized"
  8. Under "Federation" → Select "Turkish Chess Federation"
  9. Under "Sport Branch" → Select "Chess"
  10. Under "License Type" → Select "Individual License" or "Club License"
  11. Under "Province", select the license province (if you selected club license, choose the club from the list)
  12. Check the confirmation box → Click "Complete Application"

Note: There is no need to obtain a physical printout of the Parental Consent Document created via E-Government.

📋 Club Change or Individual Transfer: Athletes who will switch from a club to an individual license or change clubs must obtain a letter of consent from their current clubs. Athletes who will obtain a club license must obtain the approved document showing their affiliation with the club from their clubs.
💡 Coach's Tip: Prepare yourself for your first tournament! Train regularly for at least 2-3 months, solve tactical puzzles, and learn a few openings. If your first UKD rating is high, it will be easier to raise it later. Because your K-factor is high at the beginning (K=40) and you can gain rating quickly.

UKD Calculation Formula

UKD uses the standard Elo rating formula. After each game, your rating is updated with the following formula:

New UKD = Old UKD + K × (S − E)
K = Development coefficient
S = Actual score (1 / 0.5 / 0)
E = Expected score

How Is the Expected Score (E) Calculated?

The expected score between two players is calculated according to the rating difference:

E = 1 / (1 + 10(Opponent UKD − Player UKD) / 400)

In this formula, the constant 400 determines how the rating difference is converted into expected performance. As the rating difference grows, the stronger player's probability of winning increases.

Real Score (S) Values

Result S Value
✅ Win (You won) 1
🤝 Draw 0.5
❌ Loss (You lost) 0

K-Factor (Development Coefficient)

The K-factor is the multiplier that determines how much your UKD rating changes after each game. The higher K is, the faster the rating changes. The TSF UKD system applies the following K-factor rules:

K Value For Whom? Explanation
K=40 New players (first ~30 rated games) Allows the rating to converge quickly to actual strength. Young players also start in this category.
K=20 Players with a UKD rating below 2400 Standard development rate. Most tournament players are in this category.
K=10 Players with a UKD rating of 2400 and above Provides stability for master-level players. The rating changes more slowly.
⚠️ Why is the K-factor important? If you are a new player (K=40), you gain 2 times more points for each win — but you also lose 2 times more with each loss. This allows your rating to reach your true strength quickly. That is why performing well in your first tournaments is critically important!

Detailed Calculation Examples

Chess pieces and analysis - example of the UKD calculation formula
Your UKD rating is recalculated after each game according to the formula.

Let's understand the formula with concrete examples:

Example 1: Beating a stronger opponent

Situation: Your UKD = 1500, Opponent's UKD = 1700, K = 20

Step 1 — Expected score:

E = 1 / (1 + 10(1700−1500)/400) = 1 / (1 + 100.5) = 1 / (1 + 3.162) = 0.24

Your expected score is 0.24 — that is, a 24% chance of winning.

Step 2 — You won! (S = 1):

New UKD = 1500 + 20 × (1 − 0.24) = 1500 + 20 × 0.76 = 1500 + 15.2 = 1515

✅ Result: You gained +15 points! Beating a strong opponent earns many points.

Example 2: Losing to a weaker opponent

Situation: Your UKD = 1500, Opponent's UKD = 1300, K = 20

Step 1 — Expected score:

E = 1 / (1 + 10(1300−1500)/400) = 1 / (1 + 10-0.5) = 1 / (1 + 0.316) = 0.76

Your expected score is 0.76 — that is, a 76% chance of winning.

Step 2 — You lost! (S = 0):

New UKD = 1500 + 20 × (0 − 0.76) = 1500 + 20 × (−0.76) = 1500 − 15.2 = 1485

❌ Result: You lost -15 points! Losing to a weak opponent costs many points.

Example 3: Draw

Situation: Your UKD = 1500, Opponent's UKD = 1600, K = 20

Step 1 — Expected score:

E = 1 / (1 + 10(1600−1500)/400) = 1 / (1 + 100.25) = 1 / (1 + 1.778) = 0.36

Step 2 — You drew (S = 0.5):

New UKD = 1500 + 20 × (0.5 − 0.36) = 1500 + 20 × 0.14 = 1500 + 2.8 = 1503

🤝 Result: You gained +3 points! Even a draw against a stronger opponent earns points.

🧮 Practical Calculation: Would you like to try calculating UKD yourself? With our UKD Calculation Tool, you can instantly calculate your new UKD rating by entering all your tournament results. You can also automatically import your opponents via a Chess-Results tournament link!