26. april 2024
| Eco | Name | First moves | # games |
|---|---|---|---|
| A03 | Bird's Opening | 1 f4 d5 | 3 |
| A00 | Uncommon Opening | 1 a3, b3, d3, g4, etc. | 2 |
| A80 | Dutch | 1 d4 f5 | 2 |
| B00 | Uncommon King's Pawn Opening | 1 e4 | 2 |
| B11 | Caro-Kann, Two Knights, 3...Bg4 | 1 e4 c6 2 Sc3 d5 3 Sf3 Lg4 | 2 |
| B22 | Sicilian, Alapin | 1 e4 c5 2 c3 | 2 |
| C01 | French, Exchange | 1 e4 e6 2 d4 d5 3 exd5 exd5 4 Sc3 Sf6 5 Lg5 | 2 |
| C42 | Petrov Defense | 1 e4 e5 2 Sf3 Sf6 | 2 |
| C47 | Four Knights | 1 e4 e5 2 Sf3 Sc6 3 Sc3 Sf6 | 2 |
| D00 | Queen's Pawn Game | 1 d4 d5 | 2 |
| D03 | Torre Attack (Tartakower Variation) | 1 d4 d5 2 Sf3 Sf6 3 Lg5 | 2 |
| E43 | Nimzo-Indian, Fischer Variation | 1 d4 Sf6 2 c4 e6 3 Sc3 Lb4 4 e3 b6 | 2 |
| A01 | Nimzovich-Larsen Attack | 1 b3 | 1 |
| A04 | Reti Opening | 1 Sf3 | 1 |
| A05 | Reti Opening | 1 Sf3 Sf6 | 1 |
| A07 | King's Indian Attack | 1 Sf3 d5 2 g3 | 1 |
| A15 | English | 1 c4 Sf6 | 1 |
| A16 | English | 1 c4 Sf6 2 Sc3 | 1 |
| A18 | English, Mikenas-Carls | 1 c4 Sf6 2 Sc3 e6 3 e4 | 1 |
| A38 | English, Symmetrical | 1 c4 c5 2 Sc3 Sc6 3 g3 g6 4 Lg2 Lg7 5 Sf3 Sf6 | 1 |
| A45 | Queen's Pawn Game | 1 d4 Sf6 | 1 |
| A46 | Queen's Pawn Game | 1 d4 Sf6 2 Sf3 | 1 |
| A47 | Queen's Indian | 1 d4 Sf6 2 Sf3 b6 | 1 |
| A51 | Budapest Gambit | 1 d4 Sf6 2 c4 e5 | 1 |
| A56 | Benoni Defense | 1 d4 Sf6 2 c4 c5 | 1 |
| A84 | Dutch | 1 d4 f5 2 c4 | 1 |
| A85 | Dutch, with c4 & Nc3 | 1 d4 f5 2 c4 Sf6 3 Sc3 | 1 |
| A90 | Dutch | 1 d4 f5 2 c4 Sf6 3 g3 e6 4 Lg2 | 1 |
| B08 | Pirc, Classical | 1 e4 d6 2 d4 Sf6 3 Sc3 g6 4 Sf3 | 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 |
| B17 | Caro-Kann, Steinitz Variation | 1 e4 c6 2 d4 d5 3 Sc3 dxe4 4 Sxe4 Sd7 | 1 |
| B18 | Caro-Kann, Classical | 1 e4 c6 2 d4 d5 3 Sc3 dxe4 4 Sxe4 Lf5 | 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 |
| B28 | Sicilian, O'Kelly Variation | 1 e4 c5 2 Sf3 a6 | 1 |
| B30 | Sicilian | 1 e4 c5 2 Sf3 Sc6 | 1 |
| B99 | Sicilian, Najdorf, 7...Be7 Main line | 1 e4 c5 2 Sf3 d6 3 d4 cxd4 4 Sxd4 Sf6 5 Sc3 a6 6 Lg5 e6 7 f4 Le7 8 Df3 Dc7 9 O-O-O Sbd7 | 1 |
| C02 | French, Advance | 1 e4 e6 2 d4 d5 3 e5 | 1 |
| C14 | French, Classical | 1 e4 e6 2 d4 d5 3 Sc3 Sf6 4 Lg5 Le7 5 e5 Sfd7 6 Lxe7 Dxe7 | 1 |
| C45 | Scotch Game | 1 e4 e5 2 Sf3 Sc6 3 d4 exd4 4 Sxd4 | 1 |
| C66 | Ruy Lopez | 1 e4 e5 2 Sf3 Sc6 3 Lb5 Sf6 4 O-O d6 | 1 |
| C78 | Ruy Lopez | 1 e4 e5 2 Sf3 Sc6 3 Lb5 a6 4 La4 Sf6 5 O-O | 1 |
| D02 | Queen's Pawn Game | 1 d4 d5 2 Sf3 | 1 |
| D06 | Queen's Gambit Declined | 1 d4 d5 2 c4 | 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 |
| D10 | Queen's Gambit Declined Slav | 1 d4 d5 2 c4 c6 | 1 |
| D12 | Queen's Gambit Declined Slav | 1 d4 d5 2 c4 c6 3 Sf3 Sf6 4 e3 Lf5 | 1 |
| D20 | Queen's Gambit Accepted | 1 d4 d5 2 c4 dxc4 | 1 |
| D32 | Queen's Gambit Declined, Tarrasch | 1 d4 d5 2 c4 e6 3 Sc3 c5 | 1 |
| D45 | Queen's Gambit Declined Semi-Slav | 1 d4 d5 2 c4 e6 3 Sc3 Sf6 4 Sf3 c6 5 e3 | 1 |
| D93 | Grunfeld, with Bf4 & e3 | 1 d4 Sf6 2 c4 g6 3 Sc3 d5 4 Sf3 Lg7 5 Lf4 O-O 6 e3 | 1 |
| E12 | Queen's Indian | 1 d4 Sf6 2 c4 e6 3 Sf3 b6 | 1 |
| E61 | King's Indian | 1 d4 Sf6 2 c4 g6 3 Sc3 | 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 |