| Eco | Name | First moves | # games |
|---|
| A90 | Dutch | 1 d4 f5 2 c4 Sf6 3 g3 e6 4 Lg2 | 3 |
| D00 | Queen's Pawn Game | 1 d4 d5 | 3 |
| A29 | English, Four Knights, Kingside Fianchetto | 1 c4 e5 2 Sc3 Sc6 3 Sf3 Sf6 4 g3 | 2 |
| B21 | Sicilian, 2.f4 and 2.d4 | 1 e4 c5 2 f4 | 2 |
| B23 | Sicilian, Closed | 1 e4 c5 2 Sc3 | 2 |
| C42 | Petrov Defense | 1 e4 e5 2 Sf3 Sf6 | 2 |
| D11 | Queen's Gambit Declined Slav | 1 d4 d5 2 c4 c6 3 Sf3 | 2 |
| A10 | English | 1 c4 | 1 |
| A14 | English | 1 c4 e6 2 Sf3 d5 3 g3 Sf6 4 Lg2 Le7 5 O-O | 1 |
| A15 | English | 1 c4 Sf6 | 1 |
| A20 | English | 1 c4 e5 | 1 |
| A21 | English | 1 c4 e5 2 Sc3 | 1 |
| A24 | English, Bremen System with ...g6 | 1 c4 e5 2 Sc3 Sf6 3 g3 g6 | 1 |
| A26 | English | 1 c4 e5 2 Sc3 Sc6 3 g3 g6 4 Lg2 Lg7 5 d3 d6 | 1 |
| A34 | English, Symmetrical | 1 c4 c5 2 Sc3 | 1 |
| A45 | Queen's Pawn Game | 1 d4 Sf6 | 1 |
| A46 | Queen's Pawn Game | 1 d4 Sf6 2 Sf3 | 1 |
| A50 | Queen's Pawn Game | 1 d4 Sf6 2 c4 | 1 |
| A53 | Old Indian | 1 d4 Sf6 2 c4 d6 | 1 |
| A70 | Benoni, Classical with 7.Nf3 | 1 d4 Sf6 2 c4 c5 3 d5 e6 4 Sc3 exd5 5 cxd5 d6 6 e4 g6 7 Sf3 | 1 |
| A84 | Dutch | 1 d4 f5 2 c4 | 1 |
| B01 | Scandinavian | 1 e4 d5 | 1 |
| B02 | Alekhine's Defense | 1 e4 Sf6 | 1 |
| B07 | Pirc | 1 e4 d6 2 d4 Sf6 | 1 |
| B18 | Caro-Kann, Classical | 1 e4 c6 2 d4 d5 3 Sc3 dxe4 4 Sxe4 Lf5 | 1 |
| B22 | Sicilian, Alapin | 1 e4 c5 2 c3 | 1 |
| B42 | Sicilian, Kan | 1 e4 c5 2 Sf3 e6 3 d4 cxd4 4 Sxd4 a6 5 Ld3 | 1 |
| B50 | Sicilian | 1 e4 c5 2 Sf3 d6 | 1 |
| B84 | Sicilian, Scheveningen | 1 e4 c5 2 Sf3 d6 3 d4 cxd4 4 Sxd4 Sf6 5 Sc3 e6 6 Le2 a6 | 1 |
| B90 | Sicilian, Najdorf | 1 e4 c5 2 Sf3 d6 3 d4 cxd4 4 Sxd4 Sf6 5 Sc3 a6 | 1 |
| B91 | Sicilian, Najdorf, Zagreb (Fianchetto) Variation | 1 e4 c5 2 Sf3 d6 3 d4 cxd4 4 Sxd4 Sf6 5 Sc3 a6 6 g3 | 1 |
| C23 | Bishop's Opening | 1 e4 e5 2 Lc4 | 1 |
| C27 | Vienna Game | 1 e4 e5 2 Sc3 Sf6 3 Lc4 Sxe4 | 1 |
| C32 | King's Gambit Declined, Falkbeer Counter Gambit | 1 e4 e5 2 f4 d5 3 exd5 e4 4 d3 Sf6 | 1 |
| C44 | King's Pawn Game | 1 e4 e5 2 Sf3 Sc6 | 1 |
| C45 | Scotch Game | 1 e4 e5 2 Sf3 Sc6 3 d4 exd4 4 Sxd4 | 1 |
| C50 | Giuoco Piano | 1 e4 e5 2 Sf3 Sc6 3 Lc4 Lc5 | 1 |
| C63 | Ruy Lopez, Schliemann Defense | 1 e4 e5 2 Sf3 Sc6 3 Lb5 f5 | 1 |
| D02 | Queen's Pawn Game | 1 d4 d5 2 Sf3 | 1 |
| D03 | Torre Attack (Tartakower Variation) | 1 d4 d5 2 Sf3 Sf6 3 Lg5 | 1 |
| D06 | Queen's Gambit Declined | 1 d4 d5 2 c4 | 1 |
| D36 | Queen's Gambit Declined, Exchange, Positional line, 6.Qc2 | 1 d4 d5 2 c4 e6 3 Sc3 Sf6 4 cxd5 exd5 5 Lg5 c6 6 Dc2 | 1 |
| D37 | Queen's Gambit Declined | 1 d4 d5 2 c4 e6 3 Sc3 Sf6 4 Sf3 | 1 |
| D38 | Queen's Gambit Declined, Ragozin Variation | 1 d4 d5 2 c4 e6 3 Sc3 Sf6 4 Sf3 Lb4 | 1 |
| D40 | Queen's Gambit Declined, Semi-Tarrasch | 1 d4 d5 2 c4 e6 3 Sc3 Sf6 4 Sf3 c5 | 1 |
| D70 | Neo-Grunfeld Defense | 1 d4 Sf6 2 c4 g6 3 f3 d5 | 1 |
| E13 | Queen's Indian, 4.Nc3, Main line | 1 d4 Sf6 2 c4 e6 3 Sf3 b6 4 Sc3 Lb7 5 Lg5 h6 6 Lh4 Lb4 | 1 |
| E44 | Nimzo-Indian, Fischer Variation, 5.Ne2 | 1 d4 Sf6 2 c4 e6 3 Sc3 Lb4 4 e3 b6 5 Se2 | 1 |
| E61 | King's Indian | 1 d4 Sf6 2 c4 g6 3 Sc3 | 1 |
| E70 | King's Indian | 1 d4 Sf6 2 c4 g6 3 Sc3 Lg7 4 e4 | 1 |
| E94 | King's Indian, Orthodox | 1 d4 Sf6 2 c4 g6 3 Sc3 Lg7 4 e4 d6 5 Sf3 O-O 6 Le2 e5 7 O-O | 1 |
| E97 | King's Indian | 1 d4 Sf6 2 c4 g6 3 Sc3 Lg7 4 e4 d6 5 Sf3 O-O 6 Le2 e5 7 O-O Sc6 | 1 |
