Baron convention

The Baron bidding system in contract bridge was developed in England in the 1940s^[1] as a variant of Acol and incorporates several conventions including the Baron Three Clubs, the Baron Notrump Overcall, the Baron Two Notrump Response and the Baron Two Spades and Three Spades.

^ Manley, Brent; Horton, Mark; Greenberg-Yarbro, Tracey; Rigal, Barry, eds. (2011). The Official Encyclopedia of Bridge (7th ed.). Horn Lake, MS: American Contract Bridge League. p. 268. ISBN 978-0-939460-99-1.

[OEB7268-1] Manley, Brent; Horton, Mark; Greenberg-Yarbro, Tracey; Rigal, Barry, eds. (2011). The Official Encyclopedia of Bridge (7th ed.). Horn Lake, MS: American Contract Bridge League. p. 268. ISBN 978-0-939460-99-1.

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