Defence over

2M - Muiderberg, showing 5 card M + a m  or both M below opening strength

Natural on direct seat, dbl = T/O for a M, followed by Lebensohl

after (2M) - pass - (3♣ P/C) or (2♥) - pass - (2♠ P/C):

dbl    =    T/O for a M

3M    =    asking for ST

3NT     =     TP

after (2M) - pass - (2NT):

dbl    =    T/O for M

3M    =    Michaels

after (2M) - dbl - (3♣):

dbl    =    responsive

3M    =    asking for ST

3NT     =     TP