The Reversed Grob (Borg/Basman Defence) arises after 1.e4 g5. ECO code: B00.

Also known as the Macho Grob or the Borg Defence, this provocative move mirrors Grob\'s Attack with reversed colours. Named partly after Michael Basman, the English IM who championed unconventional openings. The move weakens the kingside seriously and invites 2.d4 with a commanding centre. While objectively dubious, it can create unusual positions that confuse unprepared opponents.