4THSuit

1NT...............................................3♦(slam try 6+suit with 2 of 3 top honours 3♥= cue bid .A♥...........................4♦ - Roman key card Gerber 5♣=2 of 5 KC +trump Q...............5♠=cue bid A♠ 6 ♣= cue bid K♣ (having already shown A♣...........6♥ =cue bid K or singleton 6♠=cue bid K♠..............................7♦ note 1: after 5♣ reply to RKCGerber 5♦would be sign off. note 2: after 6♣ cue bid 6♦ would be sign off settling for small slam note 3: if responder cue bids A♠ after openers cue bid of A ♥ opener then initiates Roman key card Gerber. note 4: after opener shows K♠ responder can sign off in 6NT. note 5: If opener has a 3rd ♠ 12 tricks is maximum unless a squeeze develops if one defender has both long ♠and ♥.(Getting into the late Terence Reece' territory now :) ) note 6: As there is a singleton in responder's hand there is likely to be another probably in trumps. If so drawing the 3rd round of trumps must be delayed until a ♠ is ruffed in dummy.which is the 13th trick. 7♦3♣1♥and 2♠