4 games · 2015–2021 · 4 classical · 0 online
Kovalenko 31 draws0 Efimenko
87.5% for Kovalenko
Openings between them
| A07 | King's Indian Attack | 1 | 100.0% |
| A29 | English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, with Nb6 | 1 | 50.0% |
| C67 | Ruy Lopez: Berlin Defense, Cordel Variation | 1 | 100.0% |
| E14 | Queen's Indian Defense: Spassky System | 1 | 100.0% |
All games
| Efimenko, Z2601 | 0-1 | Kovalenko, I2647 | Bundesliga 2019-20 | 2021 |
| Kovalenko, I2640 | ½-½ | Efimenko, Z2604 | TCh-ISR 2020 | 2020 |
| Efimenko, Z2652 | 0-1 | Kovalenko, I2682 | Najdorf Mem Open A 2015 | 2015 |
| Kovalenko, I2650 | 1-0 | Efimenko, Z2656 | 34th Zalakaros Open 2015 | 2015 |