Boland Slam Try

Used after opener bids a strong notrump (15-17/16-18 HCP), and responder bids 4NT as a quantitative raise. With a maximum opener bids 6NT, with a minimim openers passes. With an average hand, opener bids the cheapest biddable suit (4+ cards). Responder may pass, signoff in 5NT, or bid 6 of the suit.