| Eco | Name | First moves | # games |
|---|
| B01 | Scandinavian | 1 e4 d5 | 6 |
| B21 | Sicilian, 2.f4 and 2.d4 | 1 e4 c5 2 f4 | 3 |
| B22 | Sicilian, Alapin | 1 e4 c5 2 c3 | 3 |
| C50 | Giuoco Piano | 1 e4 e5 2 Sf3 Sc6 3 Lc4 Lc5 | 3 |
| A00 | Uncommon Opening | 1 a3, b3, d3, g4, etc. | 2 |
| A05 | Reti Opening | 1 Sf3 Sf6 | 2 |
| A48 | King's Indian | 1 d4 Sf6 2 Sf3 g6 | 2 |
| A90 | Dutch | 1 d4 f5 2 c4 Sf6 3 g3 e6 4 Lg2 | 2 |
| B06 | Robatsch | 1 e4 g6 | 2 |
| B07 | Pirc | 1 e4 d6 2 d4 Sf6 | 2 |
| B08 | Pirc, Classical | 1 e4 d6 2 d4 Sf6 3 Sc3 g6 4 Sf3 | 2 |
| B34 | Sicilian, Accelerated Fianchetto | 1 e4 c5 2 Sf3 Sc6 3 d4 cxd4 4 Sxd4 g6 5 Sxc6 | 2 |
| C30 | King's Gambit Declined | 1 e4 e5 2 f4 | 2 |
| C41 | Philidor Defense | 1 e4 e5 2 Sf3 d6 | 2 |
| D02 | Queen's Pawn Game | 1 d4 d5 2 Sf3 | 2 |
| D07 | Queen's Gambit Declined, Chigorin Defense | 1 d4 d5 2 c4 Sc6 | 2 |
| D37 | Queen's Gambit Declined | 1 d4 d5 2 c4 e6 3 Sc3 Sf6 4 Sf3 | 2 |
| D94 | Grunfeld | 1 d4 Sf6 2 c4 g6 3 Sc3 d5 4 Sf3 Lg7 5 e3 | 2 |
| E14 | Queen's Indian | 1 d4 Sf6 2 c4 e6 3 Sf3 b6 4 e3 | 2 |
| A03 | Bird's Opening | 1 f4 d5 | 1 |
| A10 | English | 1 c4 | 1 |
| A15 | English | 1 c4 Sf6 | 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 |
| A40 | Queen's Pawn Game | 1 d4 | 1 |
| A45 | Queen's Pawn Game | 1 d4 Sf6 | 1 |
| A49 | King's Indian, Fianchetto without c4 | 1 d4 Sf6 2 Sf3 g6 3 g3 | 1 |
| A55 | Old Indian, Main line | 1 d4 Sf6 2 c4 d6 3 Sc3 e5 4 Sf3 Sbd7 5 e4 | 1 |
| A80 | Dutch | 1 d4 f5 | 1 |
| A81 | Dutch | 1 d4 f5 2 g3 | 1 |
| A85 | Dutch, with c4 & Nc3 | 1 d4 f5 2 c4 Sf6 3 Sc3 | 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 |
| B20 | Sicilian | 1 e4 c5 | 1 |
| B50 | Sicilian | 1 e4 c5 2 Sf3 d6 | 1 |
| B51 | Sicilian, Canal-Sokolsky (Rossolimo) Attack | 1 e4 c5 2 Sf3 d6 3 Lb5+ | 1 |
| C00 | French Defense | 1 e4 e6 | 1 |
| C16 | French, Winawer | 1 e4 e6 2 d4 d5 3 Sc3 Lb4 4 e5 | 1 |
| C27 | Vienna Game | 1 e4 e5 2 Sc3 Sf6 3 Lc4 Sxe4 | 1 |
| C42 | Petrov Defense | 1 e4 e5 2 Sf3 Sf6 | 1 |
| C48 | Four Knights | 1 e4 e5 2 Sf3 Sc6 3 Sc3 Sf6 4 Lb5 | 1 |
| C55 | Two Knights Defense | 1 e4 e5 2 Sf3 Sc6 3 Lc4 Sf6 | 1 |
| C62 | Ruy Lopez, Old Steinitz Defense | 1 e4 e5 2 Sf3 Sc6 3 Lb5 d6 | 1 |
| C80 | Ruy Lopez, Open | 1 e4 e5 2 Sf3 Sc6 3 Lb5 a6 4 La4 Sf6 5 O-O Sxe4 | 1 |
| D01 | Richter-Veresov Attack | 1 d4 d5 2 Sc3 Sf6 3 Lg5 | 1 |
| D04 | Queen's Pawn Game | 1 d4 d5 2 Sf3 Sf6 3 e3 | 1 |
| D05 | Queen's Pawn Game | 1 d4 d5 2 Sf3 Sf6 3 e3 e6 | 1 |
| D11 | Queen's Gambit Declined Slav | 1 d4 d5 2 c4 c6 3 Sf3 | 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 |
| 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 |
| D38 | Queen's Gambit Declined, Ragozin Variation | 1 d4 d5 2 c4 e6 3 Sc3 Sf6 4 Sf3 Lb4 | 1 |
| D43 | Queen's Gambit Declined Semi-Slav | 1 d4 d5 2 c4 e6 3 Sc3 Sf6 4 Sf3 c6 | 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 |
| E43 | Nimzo-Indian, Fischer Variation | 1 d4 Sf6 2 c4 e6 3 Sc3 Lb4 4 e3 b6 | 1 |
| E60 | King's Indian Defense | 1 d4 Sf6 2 c4 g6 | 1 |
| E90 | King's Indian | 1 d4 Sf6 2 c4 g6 3 Sc3 Lg7 4 e4 d6 5 Sf3 | 1 |
