| Eco | Name | First moves | # games |
|---|
| B00 | Uncommon King's Pawn Opening | 1 e4 | 4 |
| A01 | Nimzovich-Larsen Attack | 1 b3 | 3 |
| A90 | Dutch | 1 d4 f5 2 c4 Sf6 3 g3 e6 4 Lg2 | 3 |
| B21 | Sicilian, 2.f4 and 2.d4 | 1 e4 c5 2 f4 | 3 |
| A85 | Dutch, with c4 & Nc3 | 1 d4 f5 2 c4 Sf6 3 Sc3 | 2 |
| B01 | Scandinavian | 1 e4 d5 | 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 |
| C56 | Two Knights | 1 e4 e5 2 Sf3 Sc6 3 Lc4 Sf6 4 d4 exd4 5 O-O Sxe4 | 2 |
| D00 | Queen's Pawn Game | 1 d4 d5 | 2 |
| D02 | Queen's Pawn Game | 1 d4 d5 2 Sf3 | 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 |
| A10 | English | 1 c4 | 1 |
| A22 | English | 1 c4 e5 2 Sc3 Sf6 | 1 |
| A25 | English | 1 c4 e5 2 Sc3 Sc6 | 1 |
| A31 | English, Symmetrical, Benoni Formation | 1 c4 c5 2 Sf3 Sf6 3 d4 | 1 |
| A34 | English, Symmetrical | 1 c4 c5 2 Sc3 | 1 |
| A40 | Queen's Pawn Game | 1 d4 | 1 |
| A45 | Queen's Pawn Game | 1 d4 Sf6 | 1 |
| A47 | Queen's Indian | 1 d4 Sf6 2 Sf3 b6 | 1 |
| A80 | Dutch | 1 d4 f5 | 1 |
| A94 | Dutch, Stonewall with Ba3 | 1 d4 f5 2 c4 Sf6 3 g3 e6 4 Lg2 Le7 5 Sf3 O-O 6 O-O d5 7 b3 c6 8 La3 | 1 |
| B13 | Caro-Kann, Exchange | 1 e4 c6 2 d4 d5 3 exd5 cxd5 | 1 |
| B14 | Caro-Kann, Panov-Botvinnik Attack | 1 e4 c6 2 d4 d5 3 exd5 cxd5 4 c4 Sf6 5 Sc3 e6 | 1 |
| B22 | Sicilian, Alapin | 1 e4 c5 2 c3 | 1 |
| B23 | Sicilian, Closed | 1 e4 c5 2 Sc3 | 1 |
| B27 | Sicilian | 1 e4 c5 2 Sf3 | 1 |
| B28 | Sicilian, O'Kelly Variation | 1 e4 c5 2 Sf3 a6 | 1 |
| B31 | Sicilian, Rossolimo Variation | 1 e4 c5 2 Sf3 Sc6 3 Lb5 g6 | 1 |
| B32 | Sicilian | 1 e4 c5 2 Sf3 Sc6 3 d4 cxd4 4 Sxd4 e5 | 1 |
| B33 | Sicilian | 1 e4 c5 2 Sf3 Sc6 3 d4 cxd4 4 Sxd4 | 1 |
| B34 | Sicilian, Accelerated Fianchetto | 1 e4 c5 2 Sf3 Sc6 3 d4 cxd4 4 Sxd4 g6 5 Sxc6 | 1 |
| B45 | Sicilian, Taimanov | 1 e4 c5 2 Sf3 e6 3 d4 cxd4 4 Sxd4 Sc6 5 Sc3 | 1 |
| B50 | Sicilian | 1 e4 c5 2 Sf3 d6 | 1 |
| B56 | Sicilian | 1 e4 c5 2 Sf3 d6 3 d4 cxd4 4 Sxd4 Sf6 5 Sc3 | 1 |
| B86 | Sicilian, Fischer-Sozin Attack | 1 e4 c5 2 Sf3 d6 3 d4 cxd4 4 Sxd4 Sf6 5 Sc3 e6 6 Lc4 | 1 |
| C01 | French, Exchange | 1 e4 e6 2 d4 d5 3 exd5 exd5 4 Sc3 Sf6 5 Lg5 | 1 |
| C24 | Bishop's Opening | 1 e4 e5 2 Lc4 Sf6 | 1 |
| C27 | Vienna Game | 1 e4 e5 2 Sc3 Sf6 3 Lc4 Sxe4 | 1 |
| C33 | King's Gambit Accepted | 1 e4 e5 2 f4 exf4 | 1 |
| C42 | Petrov Defense | 1 e4 e5 2 Sf3 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 |
| C47 | Four Knights | 1 e4 e5 2 Sf3 Sc6 3 Sc3 Sf6 | 1 |
| C50 | Giuoco Piano | 1 e4 e5 2 Sf3 Sc6 3 Lc4 Lc5 | 1 |
| C54 | Giuoco Piano | 1 e4 e5 2 Sf3 Sc6 3 Lc4 Lc5 4 c3 Sf6 5 d4 exd4 6 cxd4 | 1 |
| C63 | Ruy Lopez, Schliemann Defense | 1 e4 e5 2 Sf3 Sc6 3 Lb5 f5 | 1 |
| D04 | Queen's Pawn Game | 1 d4 d5 2 Sf3 Sf6 3 e3 | 1 |
| D15 | Queen's Gambit Declined Slav | 1 d4 d5 2 c4 c6 3 Sf3 Sf6 4 Sc3 | 1 |
| D30 | Queen's Gambit Declined | 1 d4 d5 2 c4 e6 | 1 |
| D37 | Queen's Gambit Declined | 1 d4 d5 2 c4 e6 3 Sc3 Sf6 4 Sf3 | 1 |
| D53 | Queen's Gambit Declined | 1 d4 d5 2 c4 e6 3 Sc3 Sf6 4 Lg5 Le7 | 1 |
| D59 | Queen's Gambit Declined, Tartakower | 1 d4 d5 2 c4 e6 3 Sc3 Sf6 4 Lg5 Le7 5 e3 O-O 6 Sf3 h6 7 Lh4 b6 8 cxd5 Sxd5 | 1 |
| D66 | Queen's Gambit Declined, Orthodox Defense, Bd3 line | 1 d4 d5 2 c4 e6 3 Sc3 Sf6 4 Lg5 Le7 5 e3 O-O 6 Sf3 Sbd7 7 Tc1 c6 8 Ld3 | 1 |
| D97 | Grunfeld, Russian | 1 d4 Sf6 2 c4 g6 3 Sc3 d5 4 Sf3 Lg7 5 Db3 dxc4 6 Dxc4 O-O 7 e4 | 1 |
| E11 | Bogo-Indian Defense | 1 d4 Sf6 2 c4 e6 3 Sf3 Lb4+ | 1 |
| E12 | Queen's Indian | 1 d4 Sf6 2 c4 e6 3 Sf3 b6 | 1 |
| E38 | Nimzo-Indian, Classical, 4...c5 | 1 d4 Sf6 2 c4 e6 3 Sc3 Lb4 4 Dc2 c5 | 1 |
| E61 | King's Indian | 1 d4 Sf6 2 c4 g6 3 Sc3 | 1 |
| E91 | King's Indian | 1 d4 Sf6 2 c4 g6 3 Sc3 Lg7 4 e4 d6 5 Sf3 O-O 6 Le2 | 1 |
