Opening 1st-Resp. Relay 2nd-Resp. Shape

1 1 1* 1NT S2-(&) 　 　 　 2 S2-(&) 　 　 　 2 S1-() 　 　 　 2+ S2-(&)

1 1 1NT* 2 S2-(&) 　 　 　 2 S1-() 　 　 　 2+ S2-(&)

1 1NT 2* 2 S1-() 　 　 　 2+ S2-(&)

1 2 2* 2+ S1-()

Holding 1-suiter, show it and then key into the S1-Scheme by bidding 2. A director bid to 2 shows long s. Opener then relays with 2* and Responder shows his S1-shape from 2 upwards (See S1-Scheme)

With 2-suiters, show your 1^st-suit (, or by suit-order) and then show yr 2^nd-suit (, or also by suit-order). Note that s are shown by direct bids to 2+. After Opener’s relay, bid straight into the S2=Scheme from 2 upwards (or 2 if 3-suited with both Majors).