Chess
MEDIUM RISKData breach — November 2023
In November 2023, over 800k user records were scraped from the Chess website and posted to a popular hacking forum. The data included email address, name, username and the geographic location of the user. A further 446k scraped records were later provided and added to HIBP.
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What happened in the Chess data breach?
In November 2023, over 800k user records were scraped from the Chess website and posted to a popular hacking forum. The data included email address, name, username and the geographic location of the user. A further 446k scraped records were later provided and added to HIBP.
The exposed data included 4 types of personal information. Learn more about what a data breach means for you.
Quick answer — was Chess hacked?
Yes. Chess was breached in November 2023. The breach exposed 1,274,077 records including email addresses, geographic locations, names. This breach has been independently verified. If your email was involved, your data may still be at risk today. Check if you were affected.
Why was the Chess breach so dangerous?
The Chess breach exposed 1,274,077 records — that is 1.3M people whose personal data is now circulating on the dark web. The combination of email addresses, geographic locations, names makes this a medium-risk breach that should be addressed promptly.
Don't wait to find out — check if your email was exposed in this breach now.
What data was stolen in the Chess breach?
Email addresses — used for phishing attacks and credential stuffing against your other accounts
Geographic locations — may be combined with other breach data to build a profile for targeted attacks
Names — used to build profiles and target you with personalised scams
Usernames — used to build profiles and target you with personalised scams
Is the Chess breach still dangerous in 2026?
Yes. Stolen data from the Chess breach remains dangerous years after the incident. Research shows that over 65% of stolen credentials from older breaches have never been changed by the account holders. Attackers routinely compile data from multiple breaches to build complete profiles, and credentials from 2023 are still actively used in credential stuffing attacks today.
Personal information like email addresses, phone numbers, and dates of birth never expire. Even if you changed your Chess password, the other exposed data can be combined with information from other breaches to target you. Learn more about how long stolen data stays dangerous.
Frequently asked about the Chess breach
Approximately 1,274,077 user records were exposed in the Chess breach in November 2023.
Yes. Leaked credentials are actively used in credential stuffing attacks years after a breach. If you reused your Chess password elsewhere and haven't changed it, those accounts remain at risk today.
Enter your email in the free checker on EmailLeaked. We scan 12 billion+ breach records including the full Chess dataset and tell you instantly whether your email was exposed and what data was taken.
Change your Chess password immediately, change any other account where you used the same password, enable two-factor authentication on all important accounts, and monitor for phishing emails over the next 90 days.
Who was affected by the Chess breach?
The Chess data breach affected approximately 1,274,077 users who had accounts with the service. While not the largest breach on record, it still represents a significant number of compromised accounts in our database of 970+ known breaches.
If you ever created an account with Chess or used their services, your data may have been included in this breach. Check your email now to find out. You can also read our guide on what to do immediately after a data breach.
If your email was in the Chess breach
Change your Chess password immediately
Go to Chess and change your password right now. Use a strong, unique password that you have never used anywhere else.
Change any account sharing that password
If you used the same password on other sites, change it on every one of them. Attackers test stolen credentials on hundreds of popular sites within hours.
Enable two-factor authentication
Turn on 2FA on Chess and every important account. Even if your password is known, attackers cannot get in without the second factor.
Check your other accounts for this breach
Run a full email check to see every breach your email appears in — not just this one.
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