"The Vulture" is an off-beat line of the Benoni, and while I have seen many off-beat lines over the years, I cannot see any redeeming qualities in this opening if white plays the natural 4.Qc2.
Stefan Bucker wrote a book on it here.
Does anyone see ANYTHING hopeful here for black?
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1. d4 Nf6 2. c4 c5 3. d5 Ne4 4. Qc2 Qa5+ 5. Nd2 Nd6 6. e4 g6 7. b4 $1 Qxb4 (7... cxb4 8. Nb3 Qc7 9. Bb2 Rg8 10. Nf3 (10. Bd3 {Or this attempt to keep the N from f5.} b5 11. c5 Nc4 12. Bxc4 bxc4 13. Qxc4 $16) 10... f6 (10... Bg7 11. Bxg7 Rxg7 12. c5 Kf8 13. Rc1 Ne8 14. Bb5 $18) 11. e5 fxe5 12. Bxe5 Bg7 13. Bxg7 Rxg7 14. c5 Nf5 15. Rc1 $18) 8. Rb1 Qa5 9. Bb2 Rg8 10. Bc3 Qc7 11. Bd3 f6 12. e5 fxe5 13. Ngf3 Bg7 14. Ng5 $18 e4 15. Bxe4 $1 $18