Defence over

2♦ - showing both M below opening strength

dbl    =    12+, penalty for one of the Majors   ➤    Lebensohl in follow up

2♠    =    T/O, both m    ➤    subsequent M bids by either partner shows ST

2NT     =     15-18, balanced    ➤    Gladiator (over 2♥) in follow up    ➲

3x    =    natural

3NT    =    long minor type

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(2♦) - dbl - (2M) - dbl    =    penalty

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(2♦) - pass - (pass) - ?    =    as in defending  W2♦

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(2♦) - pass - (2M) - pass

(pass) - ?

dbl    =    T/O, must have 4 card oM

2/3oM    =    natural, TP

2NT    =    both m, weaker than direct 2♠

3m = natural, weaker than direct 3m