[ehhh]

If a pair uses the unusual 2nt as a means to show any 2 suiter (they do not use michael), is it alertable (acbl)?
Generally it goes like this:
After the 2nt overcall, the partner would begin by bidding up the line with their best suit & and if there was no fit, the overcaller corrects by bidding up the line their suit. The partner now knows his partner's other suit and can correct if necessary.

[hrothgar]

1. Definitely alertable within the ACBL
2. Definitely not legal at the GCC legal. Legal at the Midchart level

[pigpenz]

usually implies two lower unbid suits, but when partner makes a move after you respond you can generally work out that what his two suits are. Is it alertable I dont know, I have used it lots of times, In INDIS noone ever knows what it means. I sort of think it is bridge logic that is implied after you remove partners call that you have the other two suits.