| Eco | Name | First moves | # games |
|---|
| D02 | Queen's Pawn Game | 1 d4 d5 2 Sf3 | 5 |
| B21 | Sicilian, 2.f4 and 2.d4 | 1 e4 c5 2 f4 | 3 |
| A35 | English, Symmetrical | 1 c4 c5 2 Sc3 Sc6 | 2 |
| A80 | Dutch | 1 d4 f5 | 2 |
| A90 | Dutch | 1 d4 f5 2 c4 Sf6 3 g3 e6 4 Lg2 | 2 |
| B16 | Caro-Kann, Bronstein-Larsen Variation | 1 e4 c6 2 d4 d5 3 Sc3 dxe4 4 Sxe4 Sf6 5 Sxf6+ gxf6 | 2 |
| C41 | Philidor Defense | 1 e4 e5 2 Sf3 d6 | 2 |
| C55 | Two Knights Defense | 1 e4 e5 2 Sf3 Sc6 3 Lc4 Sf6 | 2 |
| C57 | Two Knights | 1 e4 e5 2 Sf3 Sc6 3 Lc4 Sf6 4 Sg5 | 2 |
| D45 | Queen's Gambit Declined Semi-Slav | 1 d4 d5 2 c4 e6 3 Sc3 Sf6 4 Sf3 c6 5 e3 | 2 |
| A00 | Uncommon Opening | 1 a3, b3, d3, g4, etc. | 1 |
| A03 | Bird's Opening | 1 f4 d5 | 1 |
| A07 | King's Indian Attack | 1 Sf3 d5 2 g3 | 1 |
| A18 | English, Mikenas-Carls | 1 c4 Sf6 2 Sc3 e6 3 e4 | 1 |
| A22 | English | 1 c4 e5 2 Sc3 Sf6 | 1 |
| A31 | English, Symmetrical, Benoni Formation | 1 c4 c5 2 Sf3 Sf6 3 d4 | 1 |
| A34 | English, Symmetrical | 1 c4 c5 2 Sc3 | 1 |
| A45 | Queen's Pawn Game | 1 d4 Sf6 | 1 |
| A51 | Budapest Gambit | 1 d4 Sf6 2 c4 e5 | 1 |
| A57 | Benko Gambit | 1 d4 Sf6 2 c4 c5 3 d5 b5 | 1 |
| A85 | Dutch, with c4 & Nc3 | 1 d4 f5 2 c4 Sf6 3 Sc3 | 1 |
| A92 | Dutch | 1 d4 f5 2 c4 Sf6 3 g3 e6 4 Lg2 Le7 5 Sf3 O-O | 1 |
| B00 | Uncommon King's Pawn Opening | 1 e4 | 1 |
| B01 | Scandinavian | 1 e4 d5 | 1 |
| B03 | Alekhine's Defense | 1 e4 Sf6 2 e5 Sd5 3 d4 | 1 |
| B14 | Caro-Kann, Panov-Botvinnik Attack | 1 e4 c6 2 d4 d5 3 exd5 cxd5 4 c4 Sf6 5 Sc3 e6 | 1 |
| B15 | Caro-Kann | 1 e4 c6 2 d4 d5 3 Sc3 | 1 |
| B22 | Sicilian, Alapin | 1 e4 c5 2 c3 | 1 |
| B24 | Sicilian, Closed | 1 e4 c5 2 Sc3 Sc6 3 g3 | 1 |
| B27 | Sicilian | 1 e4 c5 2 Sf3 | 1 |
| B28 | Sicilian, O'Kelly Variation | 1 e4 c5 2 Sf3 a6 | 1 |
| C00 | French Defense | 1 e4 e6 | 1 |
| C25 | Vienna | 1 e4 e5 2 Sc3 | 1 |
| C56 | Two Knights | 1 e4 e5 2 Sf3 Sc6 3 Lc4 Sf6 4 d4 exd4 5 O-O Sxe4 | 1 |
| C58 | Two Knights | 1 e4 e5 2 Sf3 Sc6 3 Lc4 Sf6 4 Sg5 d5 5 exd5 Sa5 | 1 |
| C61 | Ruy Lopez, Bird's Defense | 1 e4 e5 2 Sf3 Sc6 3 Lb5 Sd4 | 1 |
| C89 | Ruy Lopez, Marshall | 1 e4 e5 2 Sf3 Sc6 3 Lb5 a6 4 La4 Sf6 5 O-O Le7 6 Te1 b5 7 Lb3 O-O 8 c3 d5 | 1 |
| D30 | Queen's Gambit Declined | 1 d4 d5 2 c4 e6 | 1 |
| D55 | Queen's Gambit Declined | 1 d4 d5 2 c4 e6 3 Sc3 Sf6 4 Lg5 Le7 5 e3 O-O 6 Sf3 | 1 |
| D90 | Grunfeld | 1 d4 Sf6 2 c4 g6 3 Sc3 d5 4 Sf3 | 1 |
| E21 | Nimzo-Indian, Three Knights | 1 d4 Sf6 2 c4 e6 3 Sc3 Lb4 4 Sf3 | 1 |
| E61 | King's Indian | 1 d4 Sf6 2 c4 g6 3 Sc3 | 1 |
