Blackwood convention Blackwood convention In the partnership card game contract bridge, the Blackwood convention is a popular bidding convention that was developed by Easley Blackwood. It is used to explore the partnership's possession of aces, kings and in some variants, the queen of trumps, to judge more precisely whether slam is likely to be a good contract. Two versions of Blackwood are common: "standard" Blackwood, developed by Easley in 1933, and "Roman Key Card" Blackwood ("RKC" or "RKCB"), named for the Italian team which invented it. Standard Blackwood enables one partner to count partnership aces and kings in general. Key card variants
HMS Blackwood (F78) HMS Blackwood (F78) HMS "Blackwood" was the name ship of her class (also known as the Type 14-class frigate) of second-rate anti-submarine frigates built for the Royal Navy in the 1950s. The "Blackwood" class displaced at standard load and at deep load. They had an overall length of , a beam of and a draught of . The ships were powered by one English Electric geared steam turbine that drove the single propeller shaft, using steam provided by two Babcock & Wilcox boilers. The turbine developed a total of and gave a maximum speed of . The "Blackwood"s had a