There are various "flavours" of Blackwood employed by folk these past fifty or so years: Roman, Key Card, Five Ace (The King of trumps counting as one), 14, 13, 22, etc. and etc.
I seem to recall that in those days in national (though not international) tournaments, all conventions above game level didn't have to have explicit explanations. Hence proliferation of various forms of BW.
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timeasmymeasure
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Date: 2012-06-27 04:46 pm (UTC)I seem to recall that in those days in national (though not international) tournaments, all conventions above game level didn't have to have explicit explanations. Hence proliferation of various forms of BW.