3...Ce7

  3...Cc6 4.d4 d6

  3...f5 4.e5

          4.exf5

  3...Cf6 ---> variante de Schallop

           4.Cc3 d5

           4.e5 Cd5

                  Ce4 5.d3

                           d4

                  Ch5 5.De2

                        5.Ae2 d6

                        5.d4 d6

                               d5 6.Cc3

                                   6.Ae2

                                   6.c4

  3...h6 ---> variante de Becker

          4.h4

          4.Ac4

          4.b3

          4.d4 g5 5.Ac4

                     5.Cc3

                     5.h4 Ag7 6.g3

  3...d6 ---> variante de Fischer

          4.d4 Cf6

                 g5 5.h4 g4 6.Cg5

                                 6.Cg1 f3

                                         f5

                                         Cf6 7.Cc3

                                         Df6 7.Cc3 Ce7 8.Cge2 Ah6 9.g3

                                                                             9.Dd2

                                          Ah6 7.Cc3 Cc6

                                                        c6

          4.Ac4 Ag4

                   Ae6

                   Ae7

                   Cc6

                   g5 5.h4

                       5.d4 g4

                              Ag7 6.0-0 h6

                   h6 5.d3

                       5.h4

                       5.0-0 g5

                       5.d4 g5 6.g3

                                  6.0-0 Ag7