12. december 2025
| Eco | Name | First moves | # games |
|---|---|---|---|
| A03 | Bird's Opening | 1 f4 d5 | 3 |
| A13 | English | 1 c4 e6 | 2 |
| A18 | English, Mikenas-Carls | 1 c4 Sf6 2 Sc3 e6 3 e4 | 2 |
| B13 | Caro-Kann, Exchange | 1 e4 c6 2 d4 d5 3 exd5 cxd5 | 2 |
| B40 | Sicilian | 1 e4 c5 2 Sf3 e6 | 2 |
| C16 | French, Winawer | 1 e4 e6 2 d4 d5 3 Sc3 Lb4 4 e5 | 2 |
| A00 | Uncommon Opening | 1 a3, b3, d3, g4, etc. | 1 |
| A02 | Bird's Opening | 1 f4 | 1 |
| A05 | Reti Opening | 1 Sf3 Sf6 | 1 |
| A10 | English | 1 c4 | 1 |
| A25 | English | 1 c4 e5 2 Sc3 Sc6 | 1 |
| A36 | English | 1 c4 c5 2 Sc3 Sc6 3 g3 | 1 |
| A40 | Queen's Pawn Game | 1 d4 | 1 |
| A44 | Old Benoni Defense | 1 d4 c5 2 d5 e5 | 1 |
| A47 | Queen's Indian | 1 d4 Sf6 2 Sf3 b6 | 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 |
| B02 | Alekhine's Defense | 1 e4 Sf6 | 1 |
| B11 | Caro-Kann, Two Knights, 3...Bg4 | 1 e4 c6 2 Sc3 d5 3 Sf3 Lg4 | 1 |
| B12 | Caro-Kann Defense | 1 e4 c6 2 d4 | 1 |
| B17 | Caro-Kann, Steinitz Variation | 1 e4 c6 2 d4 d5 3 Sc3 dxe4 4 Sxe4 Sd7 | 1 |
| B21 | Sicilian, 2.f4 and 2.d4 | 1 e4 c5 2 f4 | 1 |
| B30 | Sicilian | 1 e4 c5 2 Sf3 Sc6 | 1 |
| B43 | Sicilian, Kan, 5.Nc3 | 1 e4 c5 2 Sf3 e6 3 d4 cxd4 4 Sxd4 a6 5 Sc3 | 1 |
| B54 | Sicilian | 1 e4 c5 2 Sf3 d6 3 d4 cxd4 4 Sxd4 | 1 |
| C23 | Bishop's Opening | 1 e4 e5 2 Lc4 | 1 |
| C27 | Vienna Game | 1 e4 e5 2 Sc3 Sf6 3 Lc4 Sxe4 | 1 |
| C45 | Scotch Game | 1 e4 e5 2 Sf3 Sc6 3 d4 exd4 4 Sxd4 | 1 |
| C51 | Evans Gambit | 1 e4 e5 2 Sf3 Sc6 3 Lc4 Lc5 4 b4 | 1 |
| C55 | Two Knights Defense | 1 e4 e5 2 Sf3 Sc6 3 Lc4 Sf6 | 1 |
| D05 | Queen's Pawn Game | 1 d4 d5 2 Sf3 Sf6 3 e3 e6 | 1 |
| D06 | Queen's Gambit Declined | 1 d4 d5 2 c4 | 1 |
| D13 | Queen's Gambit Declined Slav, Exchange Variation | 1 d4 d5 2 c4 c6 3 Sf3 Sf6 4 cxd5 cxd5 | 1 |
| D24 | Queen's Gambit Accepted | 1 d4 d5 2 c4 dxc4 3 Sf3 Sf6 4 Sc3 | 1 |
| D26 | Queen's Gambit Accepted | 1 d4 d5 2 c4 dxc4 3 Sf3 Sf6 4 e3 e6 | 1 |
| D35 | Queen's Gambit Declined | 1 d4 d5 2 c4 e6 3 Sc3 Sf6 | 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 |
| D51 | Queen's Gambit Declined | 1 d4 d5 2 c4 e6 3 Sc3 Sf6 4 Lg5 Sbd7 | 1 |
| D55 | Queen's Gambit Declined | 1 d4 d5 2 c4 e6 3 Sc3 Sf6 4 Lg5 Le7 5 e3 O-O 6 Sf3 | 1 |
| D94 | Grunfeld | 1 d4 Sf6 2 c4 g6 3 Sc3 d5 4 Sf3 Lg7 5 e3 | 1 |
| E00 | Queen's Pawn Game | 1 d4 Sf6 2 c4 e6 | 1 |
| E01 | Catalan, Closed | 1 d4 Sf6 2 c4 e6 3 g3 d5 4 Lg2 | 1 |
| E07 | Catalan, Closed | 1 d4 Sf6 2 c4 e6 3 g3 d5 4 Lg2 Le7 5 Sf3 O-O 6 O-O Sbd7 | 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 |
| E21 | Nimzo-Indian, Three Knights | 1 d4 Sf6 2 c4 e6 3 Sc3 Lb4 4 Sf3 | 1 |
| E61 | King's Indian | 1 d4 Sf6 2 c4 g6 3 Sc3 | 1 |