wrote
I understand the basic methods of rebidding after 1M 2NT but I find
them awful. So I do not play them if I can get away from them. My own
methods are these:
1M 2NT
3C Mild slam try+ opposite a raise to 3M, asks for singleton/void
3D No slam interest opposite a raise to 3M, GF, leaves room for
partner to investigate
3M To play opposite a raise to 3M
3oM Mild slam try+ opposite a raise to 3M, shows singleton]void
3NT Strong NT opening, usually 4333
4m Mild slam try+ opposite a raise to 3M, shows singleton]void
4M Pre-emptive, no useful slam features whatever
4oM Exclusion RKCB
4NT RKCB
5m Exclusion RKCB
In practice we reverse 4S/4NT when hearts are agreed, and are
discussing doing so with 3S/3NT
1M 2NT
3D 3M Mild slam try+, asks for singleton/void
3oM Mild slam try+, shows singleton/void
4m Mild slam try+, shows singleton/void
4M To play
1M 2NT
3M 3NT Mild slam try+, asks for controls
3/4oM Mild slam try+, shows singleton/void
4m Mild slam try+, shows singleton/void
4M To play
We definitely must swap 3S and 3NT here!
After intervention over 2NT we play:
Over 3m DFPS, ie 3C/D rebids are replaced by Dbl/Pass: 3H+ unchanged
Over 3M DF3NS, ie 3C/D rebids are replaced by Dbl/3NT: 3S+ unchanged
This seems to work. Unfortunately I was not playing with my regular
partner when this occurred, so he does not play the bids over
intervention - shame - nor, for that matter, the second round
continuations.
When I am forced to play Jacoby I have little idea what I am doing.
Note that none of this means I disagree with your logic for playing
1M P 2NT (3oM)
4m
as natural, but not based on the [to me] absurd Jacoby arrangements.