I started playing the Grob, and the Reverse Grob on chess.com to see what would happen! I was shocked after a few nice positions coming from it, and a few wins of Black's a8 rook! I looked it up on Fritz' database. Of course, the normal Grob had been played a few hundred times at GM and IM level. And the Reverse Grob (1...g5!?) had also been played. Five wins! (21 losses and 7 losses, too!)
Has anyone else had any experience playing with either colour with these two openings?