| Eco | Name | First moves | # games |
|---|
| A02 | Bird's Opening | 1 f4 | 4 |
| B23 | Sicilian, Closed | 1 e4 c5 2 Sc3 | 4 |
| D02 | Queen's Pawn Game | 1 d4 d5 2 Sf3 | 4 |
| A85 | Dutch, with c4 & Nc3 | 1 d4 f5 2 c4 Sf6 3 Sc3 | 3 |
| C01 | French, Exchange | 1 e4 e6 2 d4 d5 3 exd5 exd5 4 Sc3 Sf6 5 Lg5 | 3 |
| C44 | King's Pawn Game | 1 e4 e5 2 Sf3 Sc6 | 3 |
| C47 | Four Knights | 1 e4 e5 2 Sf3 Sc6 3 Sc3 Sf6 | 3 |
| A00 | Uncommon Opening | 1 a3, b3, d3, g4, etc. | 2 |
| A13 | English | 1 c4 e6 | 2 |
| A41 | Queen's Pawn Game (with ...d6) | 1 d4 d6 | 2 |
| B30 | Sicilian | 1 e4 c5 2 Sf3 Sc6 | 2 |
| C15 | French, Winawer | 1 e4 e6 2 d4 d5 3 Sc3 Lb4 | 2 |
| C50 | Giuoco Piano | 1 e4 e5 2 Sf3 Sc6 3 Lc4 Lc5 | 2 |
| D53 | Queen's Gambit Declined | 1 d4 d5 2 c4 e6 3 Sc3 Sf6 4 Lg5 Le7 | 2 |
| A07 | King's Indian Attack | 1 Sf3 d5 2 g3 | 1 |
| A18 | English, Mikenas-Carls | 1 c4 Sf6 2 Sc3 e6 3 e4 | 1 |
| A20 | English | 1 c4 e5 | 1 |
| A22 | English | 1 c4 e5 2 Sc3 Sf6 | 1 |
| A33 | English, Symmetrical | 1 c4 c5 2 Sf3 Sf6 3 d4 cxd4 4 Sxd4 e6 5 Sc3 Sc6 | 1 |
| A40 | Queen's Pawn Game | 1 d4 | 1 |
| A42 | Modern Defense, Averbakh System | 1 d4 d6 2 c4 g6 3 Sc3 Lg7 4 e4 | 1 |
| A44 | Old Benoni Defense | 1 d4 c5 2 d5 e5 | 1 |
| A46 | Queen's Pawn Game | 1 d4 Sf6 2 Sf3 | 1 |
| A65 | Benoni, 6.e4 | 1 d4 Sf6 2 c4 c5 3 d5 e6 4 Sc3 exd5 5 cxd5 d6 6 e4 | 1 |
| A80 | Dutch | 1 d4 f5 | 1 |
| A96 | Dutch, Classical Variation | 1 d4 f5 2 c4 Sf6 3 g3 e6 4 Lg2 Le7 5 Sf3 O-O 6 O-O d6 | 1 |
| B01 | Scandinavian | 1 e4 d5 | 1 |
| B03 | Alekhine's Defense | 1 e4 Sf6 2 e5 Sd5 3 d4 | 1 |
| B19 | Caro-Kann, Classical | 1 e4 c6 2 d4 d5 3 Sc3 dxe4 4 Sxe4 Lf5 5 Sg3 Lg6 6 h4 h6 7 Sf3 Sd7 | 1 |
| B21 | Sicilian, 2.f4 and 2.d4 | 1 e4 c5 2 f4 | 1 |
| B34 | Sicilian, Accelerated Fianchetto | 1 e4 c5 2 Sf3 Sc6 3 d4 cxd4 4 Sxd4 g6 5 Sxc6 | 1 |
| C00 | French Defense | 1 e4 e6 | 1 |
| C05 | French, Tarrasch | 1 e4 e6 2 d4 d5 3 Sd2 Sf6 | 1 |
| C10 | French | 1 e4 e6 2 d4 d5 3 Sc3 | 1 |
| C18 | French, Winawer | 1 e4 e6 2 d4 d5 3 Sc3 Lb4 4 e5 c5 5 a3 Lxc3+ 6 bxc3 | 1 |
| C28 | Vienna Game | 1 e4 e5 2 Sc3 Sf6 3 Lc4 Sc6 | 1 |
| C33 | King's Gambit Accepted | 1 e4 e5 2 f4 exf4 | 1 |
| C40 | King's Knight Opening | 1 e4 e5 2 Sf3 | 1 |
| C51 | Evans Gambit | 1 e4 e5 2 Sf3 Sc6 3 Lc4 Lc5 4 b4 | 1 |
| C55 | Two Knights Defense | 1 e4 e5 2 Sf3 Sc6 3 Lc4 Sf6 | 1 |
| C57 | Two Knights | 1 e4 e5 2 Sf3 Sc6 3 Lc4 Sf6 4 Sg5 | 1 |
| C62 | Ruy Lopez, Old Steinitz Defense | 1 e4 e5 2 Sf3 Sc6 3 Lb5 d6 | 1 |
| C69 | Ruy Lopez, Exchange, Gligoric Variation, 6.d4 | 1 e4 e5 2 Sf3 Sc6 3 Lb5 a6 4 Lxc6 dc 5 O-O f6 6 d4 | 1 |
| D03 | Torre Attack (Tartakower Variation) | 1 d4 d5 2 Sf3 Sf6 3 Lg5 | 1 |
| D15 | Queen's Gambit Declined Slav | 1 d4 d5 2 c4 c6 3 Sf3 Sf6 4 Sc3 | 1 |
| D35 | Queen's Gambit Declined | 1 d4 d5 2 c4 e6 3 Sc3 Sf6 | 1 |
| D37 | Queen's Gambit Declined | 1 d4 d5 2 c4 e6 3 Sc3 Sf6 4 Sf3 | 1 |
| D40 | Queen's Gambit Declined, Semi-Tarrasch | 1 d4 d5 2 c4 e6 3 Sc3 Sf6 4 Sf3 c5 | 1 |
| D41 | Queen's Gambit Declined, Semi-Tarrasch | 1 d4 d5 2 c4 e6 3 Sc3 Sf6 4 Sf3 c5 5 cxd5 | 1 |
| E21 | Nimzo-Indian, Three Knights | 1 d4 Sf6 2 c4 e6 3 Sc3 Lb4 4 Sf3 | 1 |
| E62 | King's Indian, Fianchetto | 1 d4 Sf6 2 c4 g6 3 Sc3 Lg7 4 Sf3 d6 5 g3 | 1 |
| E81 | King's Indian, Samisch | 1 d4 Sf6 2 c4 g6 3 Sc3 Lg7 4 e4 d6 5 f3 O-O | 1 |
| E92 | King's Indian | 1 d4 Sf6 2 c4 g6 3 Sc3 Lg7 4 e4 d6 5 Sf3 O-O 6 Le2 e5 | 1 |
