An unusual unusual notrump

Making an unusual notrump call at a high level is not terribly uncommon as a step to seek partner’s input in selecting the best trump suit.

Until this morning’s club game, however, I had never, to the best of my recollection, employed an unusual notrump when I had a six card difference in length between the two suits.

Having been dealt your standard variety nine-card suit ♠T, ♥-, ♦975, ♣KT9875432, I was in third hand, all vul.  Pard opened 1♦ and RHO overcalled 4♥.  I bid 5♣ and LHO next called 5♥.  Now pard offered 5♠ and a pass to me.

Rather than adhere to the adage of “what do you call an eight/nine card suit?  trumps!”, I chose to bid 5NT (can’t partner own Hx of clubs for her remaining two cards?), and partner’s 6♦ call completed the bidding.

Dealer: N #13 Vul: All	North ♠   AK983 ♥   6 ♦   AQJT842 ♣   —
West ♠   J652 ♥   Q832 ♦   K6 ♣   AJ6		East ♠   Q74 ♥   AKJT9754 ♦   3 ♣  Q
	South ♠   T ♥   — ♦   975 ♣   KT9875432

 +1370.