In Competition

1♣ - (pass) - 1♦/♥ - (2♦/♥) 

pass    =    11-13, no 4 card support, natural continuation

dbl    =     support dbl, ONLY WHEN unbalanced

2♥/♠    =    11-13, 4 card support

2♥/♥ (cue)    =    GF, unbalanced, asking for ST

3♦    =    14-16, 4 card support,unbalanced

3♥/♠    =    11-13, 4 card support, unbalanced