I assume that most will agree that the North hand is not appopriate for a 4 spade call. I use 4 Spades as a picture bid showing good but not solid spades plus a high diamond honor. I also assume that most will find 5 spades as inappropriate but I would like to fixate on a meaning for that bid. It is obviously a slam try and so if 4 spades denies a control in both hearts and clubs the south hand should control both. J, AXX, AQJXX, AXX North with the spade ace and KXX in diamonds should try 6 diamonds as south may well have a 6 cd diamond suit.
