List of ECO codes

This is a list of the codes used to classify chess openings in the Encyclopaedia of Chess Openings. The five-volume encyclopaedia was first published by Chess Informant between 1974 and 1979, under the editorship of Aleksandar Matanović. The moves given below are primarily those found in the first edition. Subsequent editions have introduced some changes, and this is indicated where appropriate.

Table

Code	Moves	Main article
A00	Moves other than 1.b3, 1.f4, 1.Nf3, 1.c4, 1.d4 & 1.e4[1][2]	Irregular openings
A01	1.b3[1][2]	Nimzowitsch–Larsen Attack
A02	1.f4[1][2]	Bird Opening
A03	1.f4 d5[1][2]
A04	1.Nf3[1][2]	Zukertort Opening
A05	1.Nf3 Nf6[3][2]
A06	1.Nf3 d5[3][2]
A07	1.Nf3 d5 2.g3[3][2]
A08	1.Nf3 d5 2.g3 c5 3.Bg2[3] 1.Nf3 d5 2.g3 c5[2]
A09	1.Nf3 d5 2.c4[3][2]	Réti Opening
A10	1.c4[4][5]	English Opening
A11	1.c4 c6[4][5]
A12	1.c4 c6 2.Nf3 d5 3.b3[4][5]
A13	1.c4 e6[4][5]
A14	1.c4 e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 Be7 5.0-0[4] 1.c4 e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 Be7[5]
A15	1.c4 Nf6[6][5]
A16	1.c4 Nf6 2.Nc3[6][5]
A17	1.c4 Nf6 2.Nc3 e6[6][5]
A18	1.c4 Nf6 2.Nc3 e6 3.e4[6][5]
A19	1.c4 Nf6 2.Nc3 e6 3.e4 c5[6][5]
A20	1.c4 e5[7][8]	Reversed Sicilian
A21	1.c4 e5 2.Nc3[7][8]
A22	1.c4 e5 2.Nc3 Nf6[7][8]
A23	1.c4 e5 2.Nc3 Nf6 3.g3 c6[7][8]
A24	1.c4 e5 2.Nc3 Nf6 3.g3 g6[7][8]
A25	1.c4 e5 2.Nc3 Nc6[9][8]
A26	1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6[9] 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3[8]
A27	1.c4 e5 2.Nc3 Nc6 3.Nf3[9][8]
A28	1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6[9][8]
A29	1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.g3[9][8]
A30	1.c4 c5[10][11]	Symmetrical English
A31	1.c4 c5 2.Nf3 Nf6 3.d4[10][11]
A32	1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6[10][11]
A33	1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 Nc6[10][11]
A34	1.c4 c5 2.Nc3[10][11]
A35	1.c4 c5 2.Nc3 Nc6[12][11]
A36	1.c4 c5 2.Nc3 Nc6 3.g3[12][11]
A37	1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3[12][11]
A38	1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6[12][11]
A39	1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 6.0-0 0-0 7.d4[12][11]
A40	1.d4[13][14]	Queen's Pawn Game
A41	1.d4 d6[13][14]
A42	1.d4 d6 2.c4 g6 3.Nc3 Bg7 4.e4[13] 1.d4 d6 2.c4[14]
A43	1.d4 c5[13][14]	Benoni Defence
A44	1.d4 c5 2.d5 e5[13][14]
A45	1.d4 Nf6[15][14]	Indian Defence
A46	1.d4 Nf6 2.Nf3[15][14]
A47	1.d4 Nf6 2.Nf3 b6[15][14]
A48	1.d4 Nf6 2.Nf3 g6[15][14]
A49	1.d4 Nf6 2.Nf3 g6 3.g3[15][14]
A50	1.d4 Nf6 2.c4 b6[16] 1.d4 Nf6 2.c4[17]
A51	1.d4 Nf6 2.c4 e5[16][17]
A52	1.d4 Nf6 2.c4 e5 3.dxe5 Ng4[16][17]
A53	1.d4 Nf6 2.c4 d6[16][17]	Old Indian Defence
A54	1.d4 Nf6 2.c4 d6 3.Nc3 e5 4.Nf3[16][17]
A55	1.d4 Nf6 2.c4 d6 3.Nc3 e5 4.Nf3 Nbd7 5.e4[18][17]
A56	1.d4 Nf6 2.c4 c5[18][17]
A57	1.d4 Nf6 2.c4 c5 3.d5 b5[18][17]	Benko Gambit
A58	1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6[18][17]
A59	1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6 Bxa6 6.Nc3 d6 7.e4[18][17]
A60	1.d4 Nf6 2.c4 c5 3.d5 e6[19][20]	Modern Benoni
A61	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6[19] 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3[20]
A62	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.g3 Bg7 8.Bg2 0-0[19] 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.g3[20]
A63	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.g3 Bg7 8.Bg2 0-0 9.0-0 Nbd7[19] 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.g3 Bg7 8.Bg2 0-0 9.0-0 a6[20]
A64	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.g3 Bg7 8.Bg2 0-0 9.0-0 Nbd7 10.Nd2 a6 11.a4 Re8[19] 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.g3 Bg7 8.Bg2 0-0 9.0-0 a6 10.a4 Nbd7 11.Nd2[20]
A65	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4[21][20]
A66	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4[21][20]
A67	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 Bg7 8.Bb5+[21][20]
A68	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 Bg7 8.Nf3 0-0[21] 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 Bg7 8.Nf3[20]
A69	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 Bg7 8.Nf3 0-0 9.Be2 Re8[21][20]
A70	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3[22][23]
A71	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Bg5[22][23]
A72	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 0-0[22] 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2[23]
A73	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 0-0 9.0-0[22][23]
A74	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 0-0 9.0-0 a6 10.a4[22] 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 0-0 9.0-0 a6[23]
A75	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 0-0 9.0-0 a6 10.a4 Bg4[24][23]
A76	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 0-0 9.0-0 Re8[24][23]
A77	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 0-0 9.0-0 Re8 10.Nd2[24][23]
A78	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 0-0 9.0-0 Re8 10.Nd2 Na6[24][23]
A79	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 0-0 9.0-0 Re8 10.Nd2 Na6 11.f3 Nc7[24] 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 0-0 9.0-0 Re8 10.Nd2 Na6 11.f3[23]
A80	1.d4 f5[25][26]	Dutch Defence
A81	1.d4 f5 2.g3[25][26]
A82	1.d4 f5 2.e4[25][26]	Staunton Gambit
A83	1.d4 f5 2.e4 fxe4 3.Nc3 Nf6 4.Bg5[25][26]
A84	1.d4 f5 2.c4[25][26]
A85	1.d4 f5 2.c4 Nf6 3.Nc3[27][26]
A86	1.d4 f5 2.c4 Nf6 3.g3[27][26]
A87	1.d4 f5 2.c4 Nf6 3.g3 g6 4.Bg2 Bg7 5.Nf3[27][26]
A88	1.d4 f5 2.c4 Nf6 3.g3 g6 4.Bg2 Bg7 5.Nf3 0-0 6.0-0 d6 7.Nc3 c6[27][26]
A89	1.d4 f5 2.c4 Nf6 3.g3 g6 4.Bg2 Bg7 5.Nf3 0-0 6.0-0 d6 7.Nc3 Nc6[27][26]
A90	1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2[28] 1.d4 f5 2.c4 Nf6 3.g3 e6[29]
A91	1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7[28][29]
A92	1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 0-0[28][29]
A93	1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 0-0 6.0-0 d5 7.b3[28][29]
A94	1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 0-0 6.0-0 d5 7.b3 c6 8.Ba3[28] 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 0-0 6.0-0 d5 7.b3 c6[29]
A95	1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 0-0 6.0-0 d5 7.Nc3 c6[30] 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 0-0 6.0-0 d5 7.Nc3[29]
A96	1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 0-0 6.0-0 d6[30][29]
A97	1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 0-0 6.0-0 d6 7.Nc3 Qe8[30][29]
A98	1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 0-0 6.0-0 d6 7.Nc3 Qe8 8.Qc2[30][29]
A99	1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 0-0 6.0-0 d6 7.Nc3 Qe8 8.b3[30][29]
B00	1.e4[31][32]	King's Pawn Game
B01	1.e4 d5[31][32]	Scandinavian Defence
B02	1.e4 Nf6[31][32]	Alekhine Defence
B03	1.e4 Nf6 2.e5 Nd5 3.d4[31][32]
B04	1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3[31][32]
B05	1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Bg4[33][32]
B06	1.e4 g6[33][32]	Modern Defence
B07	1.e4 d6 2.d4 Nf6[33] 1.e4 d6[32]	Pirc Defence
B08	1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7[33] 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3[32]
B09	1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7[33] 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4[32]
B10	1.e4 c6[34][35]	Caro–Kann Defence
B11	1.e4 c6 2.Nf3 d5 3.Nc3 Bg4[34] 1.e4 c6 2.Nc3[35]
B12	1.e4 c6 2.d4[34][35]
B13	1.e4 c6 2.d4 d5 3.exd5 cxd5[34] 1.e4 c6 2.d4 d5 3.exd5[35]
B14	1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3[34] 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 e6[35]
B15	1.e4 c6 2.d4 d5 3.Nc3[36][35]
B16	1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6 5.Nxf6+ gxf6[36][35]
B17	1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7[36][35]
B18	1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5[36][35]
B19	1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.h4 h6 7.Nf3 Nd7[36] 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.h4 h6 7.Nf3[35]
B20	1.e4 c5[37][38]	Sicilian Defence
B21	1.e4 c5 2.f4 & 1.e4 c5 2.d4[37] 1.e4 c5 2.f4[38]
B22	1.e4 c5 2.c3[37][38]	Alapin Sicilian
B23	1.e4 c5 2.Nc3[37][38]	Closed Sicilian
B24	1.e4 c5 2.Nc3 Nc6 3.g3[37][38]
B25	1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6[39][38]
B26	1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.Be3[39][38]
B27	1.e4 c5 2.Nf3[39][38]
B28	1.e4 c5 2.Nf3 a6[39][38]
B29	1.e4 c5 2.Nf3 Nf6[39][38]
B30	1.e4 c5 2.Nf3 Nc6[40][41]
B31	1.e4 c5 2.Nf3 Nc6 3.Bb5 g6[40][41]
B32	1.e4 c5 2.Nf3 Nc6 3.d4[40][41]
B33	1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6[40][41]
B34	1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6[40][41]
B35	1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.Nc3 Bg7 6.Be3 Nf6 7.Bc4[42][41]
B36	1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4[42][41]
B37	1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Bg7[42][41]
B38	1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Bg7 6.Be3[42][41]
B39	1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Bg7 6.Be3 Nf6 7.Nc3 Ng4[42][41]
B40	1.e4 c5 2.Nf3 e6[43][44]
B41	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6[43] 1.e4 c5 2.Nf3 e6 3.d4[44]
B42	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Bd3[43][44]
B43	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Nc3[43][44]
B44	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6[43][44]
B45	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3[45][44]
B46	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 a6[45][44]
B47	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7[45][44]
B48	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 6.Be3[45][44]
B49	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 6.Be3 a6 7.Be2[45][44]
B50	1.e4 c5 2.Nf3 d6[46][47]
B51	1.e4 c5 2.Nf3 d6 3.Bb5+[46][47]
B52	1.e4 c5 2.Nf3 d6 3.Bb5+ Bd7[46][47]
B53	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Qxd4[46] 1.e4 c5 2.Nf3 d6 3.d4[47]	Chekhover Sicilian
B54	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4[46][47]
B55	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.f3 e5 6.Bb5[48] 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6[47]
B56	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3[48][47]
B57	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bc4[48][47]
B58	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Be2[48][47]
B59	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Be2 e5 7.Nb3[48][47]
B60	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5[49][50]
B61	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 Bd7 7.Qd2[49][50]
B62	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6[49][50]
B63	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2[49][50]
B64	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 Be7 8.0-0-0 0-0 9.f4[49][50]
B65	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 Be7 8.0-0-0 0-0 9.f4 Nxd4 10.Qxd4[51][50]
B66	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 a6[51][50]
B67	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 a6 8.0-0-0 Bd7[51][50]
B68	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 a6 8.0-0-0 Bd7 9.f4 Be7[51][50]
B69	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 a6 8.0-0-0 Bd7 9.f4 Be7 10.Nf3 b5 11.Bxf6[51][50]
B70	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6[52][53]	Dragon Sicilian
B71	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.f4[52][53]
B72	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3[52][53]
B73	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 Nc6 8.0-0[52][53]
B74	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 Nc6 8.0-0 0-0 9.Nb3[52][53]
B75	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3[54][53]
B76	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 0-0[54][53]
B77	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 0-0 8.Qd2 Nc6 9.Bc4[54][53]
B78	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 0-0 8.Qd2 Nc6 9.Bc4 Bd7 10.0-0-0[54][53]
B79	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 0-0 8.Qd2 Nc6 9.Bc4 Bd7 10.0-0-0 Qa5 11.Bb3 Rfc8 12.h4[54] 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 0-0 8.Qd2 Nc6 9.Bc4 Bd7 10.0-0-0 Qa5[53]
B80	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6[55][56]	Scheveningen Sicilian
B81	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.g4[55][56]
B82	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.f4[55][56]
B83	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be2[55][56]
B84	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be2 a6[55][56]
B85	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be2 a6 7.0-0 Qc7 8.f4 Nc6[57] 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be2 a6 7.0-0[56]
B86	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4[57] 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4[56]
B87	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4 a6 7.Bb3 b5[57][56]
B88	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4 Nc6[57][56]
B89	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4 Nc6 7.Be3[57][56]
B90	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6[58][59]	Najdorf Sicilian
B91	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.g3[58][59]
B92	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2[58][59]
B93	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.f4[58][59]
B94	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5[58][59]
B95	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6[60][59]
B96	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4[60][59]
B97	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Qb6[60][59]	Najdorf Sicilian, Poisoned Pawn Variation
B98	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Be7[60][59]
B99	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Be7 8.Qf3 Qc7 9.0-0-0 Nbd7[60][59]
C00	1.e4 e6[61][62]	French Defence
C01	1.e4 e6 2.d4 d5 3.exd5 exd5[61] 1.e4 e6 2.d4[62]
C02	1.e4 e6 2.d4 d5 3.e5[61][62]	French Defence, Advance Variation
C03	1.e4 e6 2.d4 d5 3.Nd2[61][62]	French Defence, Tarrasch Variation
C04	1.e4 e6 2.d4 d5 3.Nd2 Nc6 4.Ngf3 Nf6[61] 1.e4 e6 2.d4 d5 3.Nd2 Nc6[62]
C05	1.e4 e6 2.d4 d5 3.Nd2 Nf6[63][62]
C06	1.e4 e6 2.d4 d5 3.Nd2 Nf6 4.e5 Nfd7 5.Bd3 c5 6.c3 Nc6 7.Ne2 cxd4 8.cxd4[63] 1.e4 e6 2.d4 d5 3.Nd2 Nf6 4.e5 Nfd7 5.Bd3[62]
C07	1.e4 e6 2.d4 d5 3.Nd2 c5[63][62]
C08	1.e4 e6 2.d4 d5 3.Nd2 c5 4.exd5 exd5[63][62]
C09	1.e4 e6 2.d4 d5 3.Nd2 c5 4.exd5 exd5 5.Ngf3 Nc6[63][62]
C10	1.e4 e6 2.d4 d5 3.Nc3[64][65]
C11	1.e4 e6 2.d4 d5 3.Nc3 Nf6[64][65]	French Defence, Classical Variation
C12	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4[64] 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5[65]
C13	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7[64] 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 dxe4[65]
C14	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.Bxe7 Qxe7[64] 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7[65]
C15	1.e4 e6 2.d4 d5 3.Nc3 Bb4[66][65]	French Defence, Winawer Variation
C16	1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5[66][65]
C17	1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5[66][65]
C18	1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Bxc3+ 6.bxc3[66] 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3[65]
C19	1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Bxc3+ 6.bxc3 Ne7[66] 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Bxc3+ 6.bxc3 Ne7 7.Qg4[65]
C20	1.e4 e5[67][68]	Open Game
C21	1.e4 e5 2.d4 exd4[67] 1.e4 e5 2.d4[68]	Centre Game
C22	1.e4 e5 2.d4 exd4 3.Qxd4 Nc6[67] 1.e4 e5 2.d4 exd4 3.Qxd4[68]
C23	1.e4 e5 2.Bc4[67][68]	Bishop's Opening
C24	1.e4 e5 2.Bc4 Nf6[67][68]
C25	1.e4 e5 2.Nc3[69][68]	Vienna Game
C26	1.e4 e5 2.Nc3 Nf6[69][68]
C27	1.e4 e5 2.Nc3 Nf6 3.Bc4 Nxe4[69] 1.e4 e5 2.Nc3 Nf6 3.Bc4[68]
C28	1.e4 e5 2.Nc3 Nf6 3.Bc4 Nc6[69][68]
C29	1.e4 e5 2.Nc3 Nf6 3.f4 d5[69] 1.e4 e5 2.Nc3 Nf6 3.f4[68]
C30	1.e4 e5 2.f4[70][71]	King's Gambit
C31	1.e4 e5 2.f4 d5[70][71]	Falkbeer Countergambit
C32	1.e4 e5 2.f4 d5 3.exd5 e4 4.d3 Nf6[70] 1.e4 e5 2.f4 d5 3.exd5 e4[71]
C33	1.e4 e5 2.f4 exf4[70][71]
C34	1.e4 e5 2.f4 exf4 3.Nf3[70][71]
C35	1.e4 e5 2.f4 exf4 3.Nf3 Be7[72][71]
C36	1.e4 e5 2.f4 exf4 3.Nf3 d5[72][71]
C37	1.e4 e5 2.f4 exf4 3.Nf3 g5[72][71]
C38	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Bg7[72][71]
C39	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4[72][71]
C40	1.e4 e5 2.Nf3[73][74]	King's Knight Opening
C41	1.e4 e5 2.Nf3 d6[73][74]	Philidor Defence
C42	1.e4 e5 2.Nf3 Nf6[73][74]	Petrov Defence
C43	1.e4 e5 2.Nf3 Nf6 3.d4[73][74]
C44	1.e4 e5 2.Nf3 Nc6[73][74]
C45	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4[75][74]	Scotch Game
C46	1.e4 e5 2.Nf3 Nc6 3.Nc3[75][74]	Three Knights Game
C47	1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4[75] 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6[74]	Four Knights Game, Scotch Variation
C48	1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5[75][74]	Four Knights Game, Spanish Variation
C49	1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4[75][74]
C50	1.e4 e5 2.Nf3 Nc6 3.Bc4[76][77]	Italian Game
C51	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4[76][77]	Evans Gambit
C52	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5[76][77]
C53	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3[76][77]
C54	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d4 exd4 6.cxd4[76] 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6[77]
C55	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6[78][77]
C56	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.0-0 Nxe4[78] 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4[77]
C57	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5[78][77]
C58	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5[78][77]
C59	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.Bb5+ c6 7.dxc6 bxc6 8.Be2 h6[78] 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.Bb5+ c6 7.dxc6 bxc6 8.Be2[77]
C60	1.e4 e5 2.Nf3 Nc6 3.Bb5[79][80]	Ruy Lopez
C61	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nd4[79][80]
C62	1.e4 e5 2.Nf3 Nc6 3.Bb5 d6[79][80]
C63	1.e4 e5 2.Nf3 Nc6 3.Bb5 f5[79][80]
C64	1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5[79][80]
C65	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6[81][80]	Ruy Lopez, Berlin Defence
C66	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.0-0 d6[81][80]
C67	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.0-0 Nxe4[81][80]
C68	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6[81] 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6[80]	Ruy Lopez, Exchange Variation Ruy Lopez, Morphy Defence
C69	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.0-0[81] 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.0-0 f6[80]
C70	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4[82][83]
C71	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6[82][83]
C72	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.0-0[82][83]
C73	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.Bxc6+ bxc6 6.d4[82] 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.Bxc6+ bxc6[83]
C74	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.c3[82][83]
C75	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.c3 Bd7[84][83]
C76	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.c3 Bd7 6.d4 g6[84][83]
C77	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6[84][83]
C78	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0[84][83]
C79	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 d6[84][83]
C80	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Nxe4[85][86]
C81	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.Qe2[85][86]
C82	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.c3[85][86]
C83	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.c3 Be7[85][86]
C84	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7[85][86]	Ruy Lopez, Closed Defence
C85	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Bxc6 dxc6[87] 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Bxc6[86]
C86	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Qe2[87][86]
C87	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 d6[87] 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1[86]
C88	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3[87][86]
C89	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 0-0 8.c3 d5[87] 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 0-0 8.c3[86]	Ruy Lopez, Marshall Attack
C90	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 0-0 8.c3 d6[88] 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 d6[89]
C91	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 0-0 8.c3 d6 9.d4[88] 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 d6 8.c3 0-0 9.d4[89]
C92	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 0-0 8.c3 d6 9.h3[88] 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 d6 8.c3 0-0 9.h3[89]
C93	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 0-0 8.c3 d6 9.h3 h6[88] 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 d6 8.c3 0-0 9.h3 h6[89]
C94	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 0-0 8.c3 d6 9.h3 Nb8[88] 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 d6 8.c3 0-0 9.h3 Nb8[89]
C95	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 0-0 8.c3 d6 9.h3 Nb8 10.d4[90] 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 d6 8.c3 0-0 9.h3 Nb8 10.d4[89]
C96	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 0-0 8.c3 d6 9.h3 Na5 10.Bc2[90] 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 d6 8.c3 0-0 9.h3 Na5[89]
C97	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 0-0 8.c3 d6 9.h3 Na5 10.Bc2 c5 11.d4 Qc7[90] 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 d6 8.c3 0-0 9.h3 Na5 10.Bc2 c5 11.d4 Qc7[89]
C98	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 0-0 8.c3 d6 9.h3 Na5 10.Bc2 c5 11.d4 Qc7 12.Nbd2 Nc6[90] 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 d6 8.c3 0-0 9.h3 Na5 10.Bc2 c5 11.d4 Qc7 12.Nbd2 Nc6[89]
C99	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 0-0 8.c3 d6 9.h3 Na5 10.Bc2 c5 11.d4 Qc7 12.Nbd2 cxd4 13.cxd4[90] 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 d6 8.c3 0-0 9.h3 Na5 10.Bc2 c5 11.d4 Qc7 12.Nbd2 cxd4[89]
D00	1.d4 d5[91][92]	Closed Game
D01	1.d4 d5 2.Nc3 Nf6 3.Bg5[91] 1.d4 d5 2.Nc3[92]	Richter–Veresov Attack Chigorin Variation
D02	1.d4 d5 2.Nf3[91][92]
D03	1.d4 d5 2.Nf3 Nf6 3.Bg5[91][92]
D04	1.d4 d5 2.Nf3 Nf6 3.e3[91][92]
D05	1.d4 d5 2.Nf3 Nf6 3.e3 e6[93][92]
D06	1.d4 d5 2.c4[93][92]	Queen's Gambit
D07	1.d4 d5 2.c4 Nc6[93][92]	Chigorin Defence
D08	1.d4 d5 2.c4 e5[93][92]	Albin Countergambit
D09	1.d4 d5 2.c4 e5 3.dxe5 d4 4.Nf3 Nc6 5.g3[93][92]
D10	1.d4 d5 2.c4 c6[94][95]	Slav Defence
D11	1.d4 d5 2.c4 c6 3.Nf3[94][95]
D12	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 Bf5[94] 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3[95]
D13	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.cxd5 cxd5[94] 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.cxd5[95]
D14	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.cxd5 cxd5 5.Bf4 Bf5[94] 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.cxd5 cxd5 5.Nc3 Nc6 6.Bf4 Bf5[95]
D15	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3[96][95]
D16	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4[96][95]
D17	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5[96][95]
D18	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.e3[96][95]
D19	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.e3 e6 7.Bxc4 Bb4 8.0-0 0-0 9.Qe2[96][95]
D20	1.d4 d5 2.c4 dxc4[97][98]	Queen's Gambit Accepted
D21	1.d4 d5 2.c4 dxc4 3.Nf3[97][98]
D22	1.d4 d5 2.c4 dxc4 3.Nf3 a6 4.e3[97] 1.d4 d5 2.c4 dxc4 3.Nf3 a6[98]
D23	1.d4 d5 2.c4 dxc4 3.Nf3 Nf6[97][98]
D24	1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.Nc3[97][98]
D25	1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3[99][98]
D26	1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6[99][98]
D27	1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.0-0 a6[99] 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.0-0[98]
D28	1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.0-0 a6 7.Qe2[99][98]
D29	1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.0-0 a6 7.Qe2 b5 8.Bb3 Bb7[99] 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.0-0 a6 7.Qe2 b5[98]
D30	1.d4 d5 2.c4 e6[100][101]	Queen's Gambit Declined
D31	1.d4 d5 2.c4 e6 3.Nc3[100][101]
D32	1.d4 d5 2.c4 e6 3.Nc3 c5[100][101]
D33	1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3[100][101]
D34	1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7[100] 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6[101]
D35	1.d4 d5 2.c4 e6 3.Nc3 Nf6[102][101]
D36	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Bg5 c6 6.Qc2[102][101]
D37	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3[102][101]
D38	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 Bb4[102][101]
D39	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 Bb4 5.Bg5 dxc4[102] 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 Bb4 5.Bg5[101]
D40	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c5[103][104]
D41	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c5 5.cxd5[103][104]
D42	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c5 5.cxd5 Nxd5 6.e3 Nc6 7.Bd3[103] 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c5 5.cxd5 Nxd5 6.e3[104]
D43	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6[103][104]
D44	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.Bg5 dxc4[103][104]
D45	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3[105][104]
D46	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3[105][104]
D47	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4[105][104]
D48	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6[105][104]
D49	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.e4 c5 10.e5 cxd4 11.Nxb5[105] 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.e4 c5 10.e5[104]
D50	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5[106][107]
D51	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7[106][107]
D52	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.e3 c6 6.Nf3[106][107]
D53	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7[106][107]
D54	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 0-0 6.Rc1[106] 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3[107]
D55	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 0-0 6.Nf3[108][107]
D56	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 0-0 6.Nf3 h6 7.Bh4[108][107]
D57	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 0-0 6.Nf3 h6 7.Bh4 Ne4 8.Bxe7 Qxe7 9.cxd5 Nxc3 10.bxc3[108] 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 0-0 6.Nf3 h6 7.Bh4 Ne4 8.Bxe7 Qxe7 9.cxd5[107]
D58	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 0-0 6.Nf3 h6 7.Bh4 b6[108][107]
D59	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 0-0 6.Nf3 h6 7.Bh4 b6 8.cxd5 Nxd5[108] 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 0-0 6.Nf3 h6 7.Bh4 b6 8.cxd5[107]
D60	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 0-0 6.Nf3 Nbd7[109][110]
D61	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 0-0 6.Nf3 Nbd7 7.Qc2[109][110]
D62	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 0-0 6.Nf3 Nbd7 7.Qc2 c5 8.cxd5[109][110]
D63	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 0-0 6.Nf3 Nbd7 7.Rc1[109][110]
D64	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 0-0 6.Nf3 Nbd7 7.Rc1 c6 8.Qc2[109] 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 0-0 6.Nf3 Nbd7 7.Rc1 c6[110]
D65	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 0-0 6.Nf3 Nbd7 7.Rc1 c6 8.Qc2 a6 9.cxd5[111][110]
D66	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 0-0 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3[111][110]
D67	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 0-0 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 Nd5[111][110]
D68	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 0-0 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 Nd5 10.Bxe7 Qxe7 11.0-0 Nxc3 12.Rxc3 e5[111] 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 0-0 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 Nd5 10.Bxe7 Qxe7 11.0-0[110]
D69	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 0-0 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 Nd5 10.Bxe7 Qxe7 11.0-0 Nxc3 12.Rxc3 e5 13.dxe5 Nxe5 14.Nxe5 Qxe5[111] 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 0-0 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 Nd5 10.Bxe7 Qxe7 11.0-0 Nxc3 12.Rxc3 e5 13.dxe5[110]
D70	1.d4 Nf6 2.c4 g6 with d7–d5[112] 1.d4 Nf6 2.c4 g6 with 3...d5[113]	Grünfeld Defence
D71	1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.cxd5 Nxd5[112] 1.d4 Nf6 2.c4 g6 3.g3 d5[113]
D72	1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.cxd5 Nxd5 6.e4 Nb6 7.Ne2[112] 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.cxd5 Nxd5 6.e4[113]
D73	1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3[112][113]
D74	1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 0-0 6.cxd5 Nxd5 7.0-0[112] 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 0-0[113]
D75	1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 0-0 6.cxd5 Nxd5 7.0-0 c5[114][113]
D76	1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 0-0 6.cxd5 Nxd5 7.0-0 Nb6[114][113]
D77	1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 0-0 6.0-0[114][113]
D78	1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 0-0 6.0-0 c6[114][113]
D79	1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 0-0 6.0-0 c6 7.cxd5 cxd5[114] 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 0-0 6.0-0 c6 7.cxd5[113]
D80	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bg5[115] 1.d4 Nf6 2.c4 g6 3.Nc3 d5[116]
D81	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Qb3[115][116]
D82	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4[115][116]
D83	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 0-0[115][116]
D84	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 0-0 6.cxd5 Nxd5 7.Nxd5 Qxd5 8.Bxc7[115] 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 0-0 6.cxd5[116]
D85	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5[117] 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5[116]
D86	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4[117][116]
D87	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 0-0 8.Ne2 c5[117][116]
D88	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 0-0 8.Ne2 c5 9.0-0 Nc6 10.Be3 cxd4 11.cxd4[117] 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 0-0 8.Ne2 c5 9.0-0 Nc6 10.Be3 cxd4[116]
D89	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 0-0 8.Ne2 c5 9.0-0 Nc6 10.Be3 cxd4 11.cxd4 Bg4 12.f3 Na5 13.Bd3[117][116]
D90	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3[118][119]
D91	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Bg5[118][119]
D92	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Bf4[118][119]
D93	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Bf4 0-0 6.e3[118][119]
D94	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.e3[118][119]
D95	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.e3 0-0 6.Qb3[120][119]
D96	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3[120][119]	Grünfeld Defence, Russian System
D97	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 0-0 7.e4[120] 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4[119]
D98	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 0-0 7.e4 Bg4[120][119]
D99	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 0-0 7.e4 Bg4 8.Be3 Nfd7 9.Qb3[120][119]
E00	1.d4 Nf6 2.c4 e6 3.g3[121] 1.d4 Nf6 2.c4 e6[122]	Catalan Opening
E01	1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2[121] 1.d4 Nf6 2.c4 e6 3.g3 d5[122]
E02	1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Qa4+[121] 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4[122]
E03	1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Qa4+ Nbd7 6.Qxc4[121][122]
E04	1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Nf3[121][122]
E05	1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Nf3 Be7[123][122]
E06	1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 Be7 5.Nf3[123] 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 Be7[122]
E07	1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 Be7 5.Nf3 0-0 6.0-0 Nbd7[123][122]
E08	1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 Be7 5.Nf3 0-0 6.0-0 Nbd7 7.Qc2[123][122]
E09	1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 Be7 5.Nf3 0-0 6.0-0 Nbd7 7.Qc2 c6 8.Nbd2[123][122]
E10	1.d4 Nf6 2.c4 e6 3.Nf3[124][125]
E11	1.d4 Nf6 2.c4 e6 3.Nf3 Bb4+[124][125]	Bogo-Indian Defence
E12	1.d4 Nf6 2.c4 e6 3.Nf3 b6[124][125]	Queen's Indian Defence
E13	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3 Bb7 5.Bg5 h6 6.Bh4 Bb4[124] 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3 Bb7 5.Bg5[125]
E14	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.e3[124][125]
E15	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3[126][125]
E16	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Bb4+[126] 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7[125]
E17	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7[126][125]
E18	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.0-0 0-0 7.Nc3[126][125]
E19	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.0-0 0-0 7.Nc3 Ne4 8.Qc2 Nxc3 9.Qxc3[126] 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.0-0 0-0 7.Nc3 Ne4 8.Qc2[125]
E20	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4[127] 1.d4 Nf6 2.c4 e6 3.Nc3[128]	Nimzo-Indian Defence
E21	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3[127][128]
E22	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qb3[127][128]
E23	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qb3 c5 5.dxc5 Nc6[127] 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qb3 c5[128]
E24	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3[127] 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3[128]
E25	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 c5 6.f3 d5 7.cxd5[129] 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 c5[128]
E26	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 c5 6.e3[129][128]
E27	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 0-0[129][128]
E28	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 0-0 6.e3[129][128]
E29	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 0-0 6.e3 c5 7.Bd3 Nc6[129] 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 0-0 6.e3 c5[128]
E30	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Bg5[130][131]
E31	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Bg5 h6 5.Bh4 c5 6.d5 d6[130][131]
E32	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2[130][131]
E33	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 Nc6[130][131]
E34	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5[130][131]
E35	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.cxd5 exd5[132][131]
E36	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.a3[132][131]
E37	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.a3 Bxc3+ 6.Qxc3 Ne4 7.Qc2[132] 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.a3 Bxc3+ 6.Qxc3 Ne4[131]
E38	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 c5[132][131]
E39	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 c5 5.dxc5 0-0 6.Nf3[132] 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 c5 5.dxc5 0-0[131]
E40	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3[133][134]
E41	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5[133][134]
E42	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Nge2[133][134]
E43	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 b6[133][134]
E44	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 b6 5.Nge2[133][134]
E45	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 b6 5.Nge2 Ba6[135][134]
E46	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 0-0[135][134]
E47	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 0-0 5.Bd3[135][134]
E48	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 0-0 5.Bd3 d5[135][134]
E49	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 0-0 5.Bd3 d5 6.a3 Bxc3+ 7.bxc3[135] 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 0-0 5.Bd3 d5 6.a3[134]
E50	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 0-0 5.Nf3[136][137]
E51	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 0-0 5.Nf3 d5[136][137]
E52	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 0-0 5.Nf3 d5 6.Bd3 b6[136][137]
E53	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 0-0 5.Nf3 d5 6.Bd3 c5[136][137]
E54	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 0-0 5.Nf3 d5 6.Bd3 c5 7.0-0 dxc4 8.Bxc4[136][137]
E55	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 0-0 5.Nf3 d5 6.Bd3 c5 7.0-0 dxc4 8.Bxc4 Nbd7[138][137]
E56	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 0-0 5.Nf3 d5 6.Bd3 c5 7.0-0 Nc6[138][137]
E57	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 0-0 5.Nf3 d5 6.Bd3 c5 7.0-0 Nc6 8.a3 dxc4 9.Bxc4 cxd4[138][137]
E58	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 0-0 5.Nf3 d5 6.Bd3 c5 7.0-0 Nc6 8.a3 Bxc3 9.bxc3[138][137]
E59	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 0-0 5.Nf3 d5 6.Bd3 c5 7.0-0 Nc6 8.a3 Bxc3 9.bxc3 dxc4 10.Bxc4[138][137]
E60	1.d4 Nf6 2.c4 g6[139][140]	King's Indian Defence
E61	1.d4 Nf6 2.c4 g6 3.Nc3[139][140]
E62	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3[139] 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 0-0 5.g3[140]
E63	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 0-0 6.Bg2 Nc6 7.0-0 a6[139] 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 0-0 5.g3 d6 6.Bg2 Nc6[140]
E64	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 0-0 6.Bg2 c5[139] 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 0-0 5.g3 d6 6.Bg2 c5[140]
E65	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 0-0 6.Bg2 c5 7.0-0[141] 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 0-0 5.g3 d6 6.Bg2 c5 7.0-0[140]
E66	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 0-0 6.Bg2 c5 7.0-0 Nc6 8.d5[141] 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 0-0 5.g3 d6 6.Bg2 c5 7.0-0 Nc6 8.d5[140]
E67	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 0-0 6.Bg2 Nbd7[141] 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 0-0 5.g3 d6 6.Bg2 Nbd7[140]
E68	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 0-0 6.Bg2 Nbd7 7.0-0 e5 8.e4[141] 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 0-0 5.g3 d6 6.Bg2 Nbd7 7.0-0 e5 8.e4[140]
E69	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 0-0 6.Bg2 Nbd7 7.0-0 e5 8.e4 c6 9.h3[141] 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 0-0 5.g3 d6 6.Bg2 Nbd7 7.0-0 e5 8.e4 c6 9.h3[140]
E70	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4[142][143]
E71	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.h3[142][143]
E72	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.g3[142][143]
E73	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2[142][143]
E74	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 0-0 6.Bg5 c5[142][143]
E75	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 0-0 6.Bg5 c5 7.d5 e6[144][143]
E76	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4[144][143]	King's Indian Defence, Four Pawns Attack
E77	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4 0-0 6.Be2[144][143]
E78	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4 0-0 6.Be2 c5 7.Nf3[144][143]
E79	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4 0-0 6.Be2 c5 7.Nf3 cxd4 8.Nxd4 Nc6 9.Be3[144] 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4 0-0 6.Be2 c5 7.Nf3 cxd4 8.Nxd4 Nc6[143]
E80	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3[145][146]	King's Indian Defence, Sämisch Variation
E81	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 0-0[145][143]
E82	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 0-0 6.Be3 b6[145][143]
E83	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 0-0 6.Be3 Nc6[145][143]
E84	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 0-0 6.Be3 Nc6 7.Nge2 a6 8.Qd2 Rb8[145][143]
E85	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 0-0 6.Be3 e5[147][143]
E86	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 0-0 6.Be3 e5 7.Nge2 c6[147][143]
E87	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 0-0 6.Be3 e5 7.d5[147][143]
E88	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 0-0 6.Be3 e5 7.d5 c6[147][143]
E89	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 0-0 6.Be3 e5 7.d5 c6 8.Nge2 cxd5[147] 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 0-0 6.Be3 e5 7.d5 c6 8.Nge2[143]
E90	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3[148][149]
E91	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 0-0 6.Be2[148][149]
E92	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 0-0 6.Be2 e5[148][149]
E93	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 0-0 6.Be2 e5 7.d5 Nbd7[148][149]
E94	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 0-0 6.Be2 e5 7.0-0[148][149]
E95	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 0-0 6.Be2 e5 7.0-0 Nbd7 8.Re1[150] 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 0-0 6.Be2 e5 7.0-0 Nbd7[149]
E96	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 0-0 6.Be2 e5 7.0-0 Nbd7 8.Re1 c6 9.Bf1 a5[150] 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 0-0 6.Be2 e5 7.0-0 Nbd7 8.Re1[149]
E97	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 0-0 6.Be2 e5 7.0-0 Nc6[150][149]
E98	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 0-0 6.Be2 e5 7.0-0 Nc6 8.d5 Ne7 9.Ne1[150][149]
E99	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 0-0 6.Be2 e5 7.0-0 Nc6 8.d5 Ne7 9.Ne1 Nd7 10.f3 f5[150] 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 0-0 6.Be2 e5 7.0-0 Nc6 8.d5 Ne7 9.Ne1 Nd7 10.f3[149]