Assessment of O'Kelly Sicilian side line I have an opponent who is going into this as Black:

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1.e4 c5 2.Nf3 a6 3.Nc3 d6 4.d4 cxd4 5.Nxd4 e5 6.Nf5


He usually follows with 6...Bxf5 and after 7.exf5 Nf6 I play 8.g4 with a sharp game.  I like the positions I get and score well; I am seeking objective assessments of this variation as I may be biased towards White.
Black's move 5...e5 seems questionable to me. The move 6. Nf5!? is a little unusual but definitely playable. The only well-known player ever to have tried it was Jacek Bednarski, who used to obtain a draw in one of his games in the Polish national championship back in the 1960s. Bednarski is best known for losing game #55 in Bobby Fischer's "My 60 Memorable Games."

The move is a good line in a club setting because it is provocative and will take your opponent out of the book. It has good surprise value, and the resulting positions are not standard patterns which a player will be familar with, therefore, White will definitely have the edge in preparation.

In my opinion, Black is better off playing in a non-committal fashion with 6...Nf6 and aiming for g6 later.

After:

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1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 e5 6. Nf5 Bxf5 7. exf5 Nf6 8.Bg5 Be7 9. Bxf6 Bxf6 10. Qd5 Qd7 11. g4 


White has a small but definite advantage.