# Mark Ruderfer
**Wikidata**: [Q104840486](https://www.wikidata.org/wiki/Q104840486)  
**Source**: https://4ort.xyz/entity/mark-ruderfer


## References

1. ratings.fide.com
2. OlimpBase
3. FIDE Standard Ratings as of 31 July 2021
4. FIDE Standard Ratings as of 31 August 2021
5. FIDE Standard Ratings as of 31 May 2021
6. FIDE Standard Ratings as of 30 September 2021