| Eco | Name | First moves | # games |
|---|
| A00 | Uncommon Opening | 1 a3, b3, d3, g4, etc. | 4 |
| C41 | Philidor Defense | 1 e4 e5 2 Sf3 d6 | 4 |
| A02 | Bird's Opening | 1 f4 | 3 |
| B07 | Pirc | 1 e4 d6 2 d4 Sf6 | 3 |
| B30 | Sicilian | 1 e4 c5 2 Sf3 Sc6 | 3 |
| E60 | King's Indian Defense | 1 d4 Sf6 2 c4 g6 | 3 |
| A04 | Reti Opening | 1 Sf3 | 2 |
| B06 | Robatsch | 1 e4 g6 | 2 |
| B08 | Pirc, Classical | 1 e4 d6 2 d4 Sf6 3 Sc3 g6 4 Sf3 | 2 |
| B12 | Caro-Kann Defense | 1 e4 c6 2 d4 | 2 |
| B34 | Sicilian, Accelerated Fianchetto | 1 e4 c5 2 Sf3 Sc6 3 d4 cxd4 4 Sxd4 g6 5 Sxc6 | 2 |
| B50 | Sicilian | 1 e4 c5 2 Sf3 d6 | 2 |
| B78 | Sicilian, Dragon, Yugoslav Attack, 10.castle long | 1 e4 c5 2 Sf3 d6 3 d4 cxd4 4 Sxd4 Sf6 5 Sc3 g6 6 Le3 Lg7 7 f3 O-O 8 Dd2 Sc6 9 Lc4 Ld7 10 O-O-O | 2 |
| A05 | Reti Opening | 1 Sf3 Sf6 | 1 |
| A07 | King's Indian Attack | 1 Sf3 d5 2 g3 | 1 |
| A08 | King's Indian Attack | 1 Sf3 d5 2 g3 c5 3 Lg2 | 1 |
| A11 | English, Caro-Kann Defensive System | 1 c4 c6 | 1 |
| A15 | English | 1 c4 Sf6 | 1 |
| A20 | English | 1 c4 e5 | 1 |
| A21 | English | 1 c4 e5 2 Sc3 | 1 |
| A28 | English | 1 c4 e5 2 Sc3 Sc6 3 Sf3 Sf6 | 1 |
| A29 | English, Four Knights, Kingside Fianchetto | 1 c4 e5 2 Sc3 Sc6 3 Sf3 Sf6 4 g3 | 1 |
| A35 | English, Symmetrical | 1 c4 c5 2 Sc3 Sc6 | 1 |
| A39 | English, Symmetrical, Main line with d4 | 1 c4 c5 2 Sc3 Sc6 3 g3 g6 4 Lg2 Lg7 5 Sf3 Sf6 6 O-O O-O 7 d4 | 1 |
| A40 | Queen's Pawn Game | 1 d4 | 1 |
| A41 | Queen's Pawn Game (with ...d6) | 1 d4 d6 | 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 |
| A80 | Dutch | 1 d4 f5 | 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 |
| B13 | Caro-Kann, Exchange | 1 e4 c6 2 d4 d5 3 exd5 cxd5 | 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 |
| B38 | Sicilian, Accelerated Fianchetto, Maroczy Bind, 6.Be3 | 1 e4 c5 2 Sf3 Sc6 3 d4 cxd4 4 Sxd4 g6 5 c4 Lg7 6 Le3 | 1 |
| B52 | Sicilian, Canal-Sokolsky (Rossolimo) Attack | 1 e4 c5 2 Sf3 d6 3 Lb5+ Ld7 | 1 |
| B76 | Sicilian, Dragon, Yugoslav Attack | 1 e4 c5 2 Sf3 d6 3 d4 cxd4 4 Sxd4 Sf6 5 Sc3 g6 6 Le3 Lg7 7 f3 O-O | 1 |
| B92 | Sicilian, Najdorf, Opocensky Variation | 1 e4 c5 2 Sf3 d6 3 d4 cxd4 4 Sxd4 Sf6 5 Sc3 a6 6 Le2 | 1 |
| C01 | French, Exchange | 1 e4 e6 2 d4 d5 3 exd5 exd5 4 Sc3 Sf6 5 Lg5 | 1 |
| C02 | French, Advance | 1 e4 e6 2 d4 d5 3 e5 | 1 |
| C24 | Bishop's Opening | 1 e4 e5 2 Lc4 Sf6 | 1 |
| C34 | King's Gambit Accepted | 1 e4 e5 2 f4 exf4 3 Sf3 | 1 |
| C44 | King's Pawn Game | 1 e4 e5 2 Sf3 Sc6 | 1 |
| C50 | Giuoco Piano | 1 e4 e5 2 Sf3 Sc6 3 Lc4 Lc5 | 1 |
| C55 | Two Knights Defense | 1 e4 e5 2 Sf3 Sc6 3 Lc4 Sf6 | 1 |
| C65 | Ruy Lopez, Berlin Defense | 1 e4 e5 2 Sf3 Sc6 3 Lb5 Sf6 | 1 |
| D06 | Queen's Gambit Declined | 1 d4 d5 2 c4 | 1 |
| D14 | Queen's Gambit Declined Slav, Exchange Variation | 1 d4 d5 2 c4 c6 3 Sf3 Sf6 4 cxd5 cxd5 5 Sc3 Sc6 6 Lf4 Lf5 | 1 |
| D35 | Queen's Gambit Declined | 1 d4 d5 2 c4 e6 3 Sc3 Sf6 | 1 |
| D43 | Queen's Gambit Declined Semi-Slav | 1 d4 d5 2 c4 e6 3 Sc3 Sf6 4 Sf3 c6 | 1 |
| D45 | Queen's Gambit Declined Semi-Slav | 1 d4 d5 2 c4 e6 3 Sc3 Sf6 4 Sf3 c6 5 e3 | 1 |
| D79 | Neo-Grunfeld, 6.O-O, Main line | 1 d4 Sf6 2 c4 g6 3 g3 d5 4 Lg2 Lg7 5 Sf3 O-O 6 O-O c6 7 cxd5 cxd5 | 1 |
| D94 | Grunfeld | 1 d4 Sf6 2 c4 g6 3 Sc3 d5 4 Sf3 Lg7 5 e3 | 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 |
| E17 | Queen's Indian | 1 d4 Sf6 2 c4 e6 3 Sf3 b6 4 g3 Lb7 5 Lg2 Le7 | 1 |
| E21 | Nimzo-Indian, Three Knights | 1 d4 Sf6 2 c4 e6 3 Sc3 Lb4 4 Sf3 | 1 |
| E51 | Nimzo-Indian, 4.e3 | 1 d4 Sf6 2 c4 e6 3 Sc3 Lb4 4 e3 O-O 5 Sf3 d5 | 1 |
| E61 | King's Indian | 1 d4 Sf6 2 c4 g6 3 Sc3 | 1 |
| E62 | King's Indian, Fianchetto | 1 d4 Sf6 2 c4 g6 3 Sc3 Lg7 4 Sf3 d6 5 g3 | 1 |
| E70 | King's Indian | 1 d4 Sf6 2 c4 g6 3 Sc3 Lg7 4 e4 | 1 |
| E73 | King's Indian | 1 d4 Sf6 2 c4 g6 3 Sc3 Lg7 4 e4 d6 5 Le2 | 1 |
