3 games · 2014–2025 · 2 classical · 1 online
Efimov 01 draws2 Wiedenkeller
16.7% for Efimov
Openings between them
| D11 | Slav Defense: Quiet Variation, Pin Defense | 1 | 0.0% |
| E38 | Nimzo-Indian Defense: Classical Variation, Berlin Variation | 1 | 0.0% |
| E49 | Nimzo-Indian Defense: Normal Variation, Botvinnik System | 1 | 50.0% |
All games
| Efimov, Ig2331 | ½-½ | Wiedenkeller, M2387 | TCh-Euro Small Nations | 2025 |
| Wiedenkeller, M2445 | 1-0 | Efimov, Ig2416 | Euro Small Nations Hybrid | 2021 |
| Wiedenkeller, M2475 | 1-0 | Efimov, Ig2395 | ch-Europe Small Nations zt 1.10 2014 | 2014 |