falcon111

Responder can do two things based on his/her hand pattern . If the hand is unbalanced say 5+H or 4+m , then first make transfer to 2H then bidding the minor suit at the 3 level to create a game force first . This way opener have a chance to show fitness or non-fitness in ♥ at 3 level . If fitness found , one can ask keycards by the way 3014 or 1430 whatever method partnership uses for RKCB . If opener shows fitness in responder's minor suit , still responder may employ some minorwood ask on agreed minor . If but if responder has purely 5♥ rest 332 or even 5♥4m(poor)22 pattern (4m suit does not have enough body to be introduced at the convenient 3 level ) , can bid 5NT as pick-a slam . This promises intention to play either in 6H or even 6NT or even 4-4 in minor (if opener bids a minor suit at 6 level if no H fit and eventually that 4+ minor happens to be responder's 2nd side 4 +card suit ).

I think that PrecisionL has posted the correct document because in 2011 BM CC they used to play 2♦=4♠+5+minor(non-vul). Their 2011 CC may have a detailed discussion in support of the following : OPENING 2♦ (4♠5+minor)(non vul)[2011 CC ] 2♦ 2♥ = non forcing 2♠ = to play 2NT = relay positive 3♣ = pass or correct 3♦ = 5+♥ forcing game 3♥ = 6+♥ limit 3♠ = barrage 3NT = to play 4♣ = pass or correct 4♦ = to play(pd may bid 5) 4♥/♠= to play 4NT = bid your minor 5♣/♦= to play Responses were [2011 -- 2♦=4♠+5+m (non-vul)] 2♦ 2♥ 2♠ = 4♠ good and max, 1♥ →2nt nat, 3♣ pass or correct 2NT = supermax with 1♥→3♣ pass or correct 3♣ = 6+♣ good suit 3♦ = 6+♦ good suit 3♥ = 3♥ non minimum 2♦ 2NT 3♣ =minimum 5+♣→3♠ limit, other F.G 3♦=minimum 5+♦→3♠ limit other F.G 3♥=max 5+♣→F.G 3♠=max5+♦ →F.G 2♦ 3♦ 3♥=5+♣ max, 1♥ 3♠=5+♦ max, 1♥ 3NT= 3♥ non minimum 4♣/♦=2 cards in ♥ and 5 + cards in the bidding minor 4♥=3♥ minimum But most probably 2013 CC was not updated or formatted correctly if so lot of features wouldn't have been there (which they used earlier in 2011 ).

I am not sure about detailed developments of 2♦ opening (as per BM CC), but could have worked in the following way : 2♦ 2♥ (Relay) 2♠= Either 5+♥/♠ plus 4+unspecfied card on the side or 6+♥/♠ mono suiter . 2NT= Bal 23 + --> system on 3♣=5+♣plus 4+unspecfied card on the side 3♦= 6+♣/♦ 3♥=5+♦plus 4+♣ 3♠=5+♦plus 4+♥ 3NT=5+♦plus 4+♠ 4♣=5+♦plus 4+♠stronger . After : 2♦ 2♥ (Relay) 2♠ 2NT(RELAY) 3♣= 5+♥plus 4+unspecfied card on the side --> 3♦(relay ) for 4+unspecfied card on the side whereas 3♥ sets ♥ and 4x cue bid in favor of hearts and 4♥is retained as Sign-off . 3♦=6+♥/♠ mono suiter ---> 3♥(relay)---> 3♠=6+♠ & 3NT=6+♥ 3♥=5+♠& 4+♣--->3♠sets ♠& 4♣sets ♣ 3♠=5+♠&4+♦-->4♣sets ♠& 4♦sets ♦(better than direct 4♠/5♦Sign off ?) 3NT=5+♠& 4+♥-->4♣sets ♥& 4♦sets ♠(better than direct 4♥/4♠Sign off ?) 4♣=5+♠& 4+♥stronger++?