comment: I was surprised to find that this position is well-studied by opening theory and that this move is already a losing mistake.
context: 1. d2d4  1... g8f6  2. c1f4  2... d7d5  3. e2e3  3... c7c5  4. d4c5 This leads to sharp play. 4... e7e6  5. b2b4  5... a7a5  6. c2c3  6... c8d7 Preparing b7-b6; 7. b1d2  7... a5b4  8. c3b4  8... b7b6  9. c5b6  9... f8b4  10. f4c7  10... d8e7 The right square, sacrificing a piece. 11. b6b7  11... a8a3  12. c7b8  12... d7a4 