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The Blumenfeld Gambit (1.d4 Nf6 2.Nf3 e6 3.c4 c5 4.d5 b5!?) was invented by the lawyer, chess master, and opening theorist Benjamin Markovich Blumenfeld (24 May 1884 – 5 March 1947). It is a very creative and challenging line where Black immediately contests White's central pawn formation.
