# Piotr Kaczorowski
**Wikidata**: [Q85867351](https://www.wikidata.org/wiki/Q85867351)  
**Source**: https://4ort.xyz/entity/piotr-kaczorowski


## References

1. ICCF correspondence chess player database
2. Virtual International Authority File
3. ratings.fide.com
4. OlimpBase
5. Lichess user database