26. april 2024
| Eco | Name | First moves | # games |
|---|---|---|---|
| A03 | Bird's Opening | 1 f4 d5 | 3 |
| A07 | King's Indian Attack | 1 Sf3 d5 2 g3 | 3 |
| B21 | Sicilian, 2.f4 and 2.d4 | 1 e4 c5 2 f4 | 3 |
| A00 | Uncommon Opening | 1 a3, b3, d3, g4, etc. | 2 |
| A36 | English | 1 c4 c5 2 Sc3 Sc6 3 g3 | 2 |
| A45 | Queen's Pawn Game | 1 d4 Sf6 | 2 |
| A56 | Benoni Defense | 1 d4 Sf6 2 c4 c5 | 2 |
| A85 | Dutch, with c4 & Nc3 | 1 d4 f5 2 c4 Sf6 3 Sc3 | 2 |
| B12 | Caro-Kann Defense | 1 e4 c6 2 d4 | 2 |
| C24 | Bishop's Opening | 1 e4 e5 2 Lc4 Sf6 | 2 |
| D00 | Queen's Pawn Game | 1 d4 d5 | 2 |
| A04 | Reti Opening | 1 Sf3 | 1 |
| A21 | English | 1 c4 e5 2 Sc3 | 1 |
| A23 | English, Bremen System, Keres Variation | 1 c4 e5 2 Sc3 Sf6 3 g3 c6 | 1 |
| A34 | English, Symmetrical | 1 c4 c5 2 Sc3 | 1 |
| A47 | Queen's Indian | 1 d4 Sf6 2 Sf3 b6 | 1 |
| A57 | Benko Gambit | 1 d4 Sf6 2 c4 c5 3 d5 b5 | 1 |
| A95 | Dutch, Stonewall | 1 d4 f5 2 c4 Sf6 3 g3 e6 4 Lg2 Le7 5 Sf3 O-O 6 O-O d5 7 Sc3 c6 | 1 |
| B00 | Uncommon King's Pawn Opening | 1 e4 | 1 |
| B07 | Pirc | 1 e4 d6 2 d4 Sf6 | 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 |
| B15 | Caro-Kann | 1 e4 c6 2 d4 d5 3 Sc3 | 1 |
| B18 | Caro-Kann, Classical | 1 e4 c6 2 d4 d5 3 Sc3 dxe4 4 Sxe4 Lf5 | 1 |
| B20 | Sicilian | 1 e4 c5 | 1 |
| B23 | Sicilian, Closed | 1 e4 c5 2 Sc3 | 1 |
| B26 | Sicilian, Closed, 6.Be3 | 1 e4 c5 2 Sc3 Sc6 3 g3 g6 4 Lg2 Lg7 5 d3 d6 6 Le3 | 1 |
| B34 | Sicilian, Accelerated Fianchetto | 1 e4 c5 2 Sf3 Sc6 3 d4 cxd4 4 Sxd4 g6 5 Sxc6 | 1 |
| B40 | Sicilian | 1 e4 c5 2 Sf3 e6 | 1 |
| B56 | Sicilian | 1 e4 c5 2 Sf3 d6 3 d4 cxd4 4 Sxd4 Sf6 5 Sc3 | 1 |
| B95 | Sicilian, Najdorf, 6...e6 | 1 e4 c5 2 Sf3 d6 3 d4 cxd4 4 Sxd4 Sf6 5 Sc3 a6 6 Lg5 e6 | 1 |
| C00 | French Defense | 1 e4 e6 | 1 |
| C01 | French, Exchange | 1 e4 e6 2 d4 d5 3 exd5 exd5 4 Sc3 Sf6 5 Lg5 | 1 |
| C31 | King's Gambit Declined, Falkbeer Counter Gambit | 1 e4 e5 2 f4 d5 | 1 |
| C35 | King's Gambit Accepted, Cunningham | 1 e4 e5 2 f4 exf4 3 Sf3 Le7 | 1 |
| C41 | Philidor Defense | 1 e4 e5 2 Sf3 d6 | 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 |
| C62 | Ruy Lopez, Old Steinitz Defense | 1 e4 e5 2 Sf3 Sc6 3 Lb5 d6 | 1 |
| C87 | Ruy Lopez | 1 e4 e5 2 Sf3 Sc6 3 Lb5 a6 4 La4 Sf6 5 O-O Le7 6 Te1 d6 | 1 |
| C90 | Ruy Lopez, Closed | 1 e4 e5 2 Sf3 Sc6 3 Lb5 a6 4 La4 Sf6 5 O-O Le7 6 Te1 b5 7 Lb3 O-O 8 c3 d6 | 1 |
| D07 | Queen's Gambit Declined, Chigorin Defense | 1 d4 d5 2 c4 Sc6 | 1 |
| D08 | Queen's Gambit Declined, Albin Counter Gambit | 1 d4 d5 2 c4 e5 | 1 |
| D12 | Queen's Gambit Declined Slav | 1 d4 d5 2 c4 c6 3 Sf3 Sf6 4 e3 Lf5 | 1 |
| D38 | Queen's Gambit Declined, Ragozin Variation | 1 d4 d5 2 c4 e6 3 Sc3 Sf6 4 Sf3 Lb4 | 1 |
| D46 | Queen's Gambit Declined Semi-Slav | 1 d4 d5 2 c4 e6 3 Sc3 Sf6 4 Sf3 c6 5 e3 Sbd7 6 Ld3 | 1 |
| D52 | Queen's Gambit Declined | 1 d4 d5 2 c4 e6 3 Sc3 Sf6 4 Lg5 Sbd7 5 e3 c6 6 Sf3 | 1 |
| D94 | Grunfeld | 1 d4 Sf6 2 c4 g6 3 Sc3 d5 4 Sf3 Lg7 5 e3 | 1 |
| E70 | King's Indian | 1 d4 Sf6 2 c4 g6 3 Sc3 Lg7 4 e4 | 1 |
| E81 | King's Indian, Samisch | 1 d4 Sf6 2 c4 g6 3 Sc3 Lg7 4 e4 d6 5 f3 O-O | 1 |