G. Efthimiou
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Mitilini op | ??/??/1996 | 763 |  Greece |
G. Efthimiou Repertoire with White pieces (most played)
| ECO | Opening | Games |
| A32 | English, symmetrical variation | 1 games |
| A84 | Dutch defence | 1 games |
| A42 | Modern defence, Averbakh system | 1 games |
| E10 | Queen's pawn game | 1 games |
G. Efthimiou Repertoire with Black pieces (most played)
| ECO | Opening | Games |
| E91 | King's Indian, 6.Be2 | 1 games |
| E81 | King's Indian, Saemisch, 5...O-O | 1 games |
| B06 | Robatsch (modern) defence | 1 games |
| B07 | Pirc defence | 1 games |
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