X                     

1¨                              ?

                                            - 1M               : natural, four or more cards, one round-forcing

                                            - 1NT              : balanced hand, 7-10 HCP.

                                            - 2§                : natural, non-forcing

                                            - 2¨               : four card support, 6-10 points                    

                                            - 2M               : natural, preemptive

                                            - 3§                : natural, preemptive

                                            - 3¨               : preemptive

                                            - 2NT              : Truscott, limit raise or more with unbalanced

                                            - 3N                : to play

                                            - XX                : strong hand

After major opening

                      X                     

1©                               ?

                                            - 1ª                : natural, five cards, forcing

                                            - 1NT              : transfer to 2§

                                            - 2§                : transfer to 2¨

                                            - 2¨               : transfer to 2©, good support

                                            - 2©                : bad support

                                            - 2ª                : natural, preemptive

                                            - 2NT              : Truscott, limit raise or more with unbalanced

                                            - 3m               : constructive raise, 5-6 HCP, four card support, unbalanced

                                            - 3©                : preemptive

                                            - 3ª                : splinter with 10+ HCP

                                            - 3NT              : gambling with defence

                                            - 4m               : splinter with 10+ HCP

                                            - 4©                : gambling without defence

                                            - 4ª                : to play

            X         

1 ª                              ?

                                            - 1NT              : transfer to 2§

                                            - 2§                : transfer to 2¨

                                            - 2¨               : transfer to 2©

                                            - 2©                : transfer to 2ª, good support

                                            - 2ª                : bad support

                                            - 2NT              : Truscott, limit raise or more with unbalanced

                                            - 3m               : constructive raise, 5-6 HCP, four card support, unbalanced

                                            - 3©                : constructive raise, 5-6 HCP, four card support, unbalanced

                                            - 3ª                : preemptive

                                            - 3NT              : gambling with defence

                                            - 4m               : splinter with 10+ HCP

                                            - 4©                : splinter with 10+ HCP

                                            - 4ª                : gambling without defence