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 Database:GAMEBASE   ***   Top 40 ECO   ***



     ECO                                    Tot     +          -   Perc  Elo



  1. D36 Queen's Gambit (Exchange          2622   1026  1129   467   60%  2701  

  2. D30 Queen's Gambit (without Nc3)      2713   1069  1018   626   58%  2581  

  3. D35 Queen's Gambit (Exchange          2504    962  1016   526   58%  2397  

  4. C42 Petroff's Defence                 2732    946  1268   518   57%  2601  

  5. D85 Gruenfeld Defence (Main Line)     2399    914   949   536   57%  2583  

  6. B07 Pirc Defence                      6726   2737  2130  1859   56%  2409  

  7. B12 Caro Kann (Advance Variation)     2760   1140   835   785   56%  2428  

  8. E97 King's Indian Defence             2440    988   788   664   56%  2511  

  9. B01 Centre Counter                    4104   1671  1230  1203   55%  2488  

 10. E11 Bogo Indian Defence               3700   1230  1669   801   55%  2443  

 11. E12 Queen's Indian Defence            3452   1180  1480   792   55%  2483  

 12. E92 King's Indian Defence             2787    987  1114   686   55%  2424  

 13. E94 King's Indian Defence             2607    997   885   725   55%  2423  

 14. A30 English Opening (Symmetrical      3851   1181  1834   836   54%  2415  

 15. E15 Queen's Indian Defence (Main      3050    900  1514   636   54%  2541  

 16. B30 Sicilian Defence (Rossolimo       2818   1087   914   817   54%  2380  

 17. A13 Reti Opening                      2814    973  1146   695   54%  2425  

 18. C11 French Defence                    2776   1034   977   765   54%  2548  

 19. A57 Volga Gambit                      2555   1038   716   801   54%  2375  

 20. A08 Barcza System                     2391    938   712   741   54%  2496  

 21. B42 Sicilian Defence (Paulsen         2391    885   821   685   54%  2494  

 22. B06 Modern Defence                    5640   2190  1671  1779   53%  2365  

 23. B08 Pirc Defence                      3637   1232  1406   999   53%  2372  

 24. A40 Unusual Replies to 1.d4           2983   1098  1007   878   53%  2409  

 25. B85 Sicilian Defence (Scheveningen    2849    988  1068   793   53%  2429  

 26. C00 French Defence (Unusual Moves)    2710   1071   778   861   53%  2340  

 27. B33 Sicilian Defence                  4041   1428  1385  1228   52%  2331  

 28. A07 Barcza System (with               4032   1316  1633  1083   52%  2368  

 29. D02 Queen's Pawn Game                 4495   1529  1616  1350   51%  2317  

 30. C02 French Defence (Advance           3488   1308   962  1218   51%  2256  

 31. A41 Modern Defence counter 1.d4       2551    879   865   807   51%  2477  

 32. D00 Queen's Pawn Game                 2471    868   803   800   51%  2419  

 33. B22 Sicilian Defence (Alapin          7763   2428  2928  2407   50%  2338  

 34. A00 Irregular Openings                4386   1568  1254  1563   50%  2269  

 35. A04 Dutch System                      3324   1135  1096  1093   50%  2348  

 36. B23 Sicilian Defence (Closed          3138   1108   935  1095   50%  2280  

 37. A45 Queen's Pawn Opening              3022   1096   869  1057   50%  2561  

 38. A46 Queen's Pawn Opening              3974   1227  1465  1282   49%  2301  

 39. A48 King's Indian Defence (without    3426   1079  1224  1123   49%  2334  

 40. C01 French Defence (Exchange          2987    858  1269   860   49%  2296