A bid made in response to an opening notrump bid to show a hand with a single
suit which is a minor suit. This bid is used similarly to the Jacoby Transfer.
The transfer bid, however, is to transfer to a minor suit. Generally 2Notrump is
used as the transfer bid to force the bid of 3 Clubs. However some partnerships
play that 3 Clubs is a transfer to 3 Diamonds. These transfers show a one suited
hand and the rebids will further describe the bid. For a weak hand the responder
will just pass 3 Clubs or bid 3 Diamonds if diamonds is the suit. Further
bidding indicates a strong hand, often with slam intentions.