# Blackmar–Diemer Gambit

> chess opening 1. d4 d5 2. e4

**Wikidata**: [Q880889](https://www.wikidata.org/wiki/Q880889)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Blackmar–Diemer_Gambit)  
**Source**: https://4ort.xyz/entity/blackmar-diemer-gambit


## References

1. Integrated Authority File
2. Freebase Data Dumps. 2013
3. Faceted Application of Subject Terminology
4. National Library of Israel Names and Subjects Authority File