Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nc6/3. Bc4/3...Nf6/4. Ng5/4...d5/5. exd5/5...Nd4/6. c3/6...b5/7. Bf1/7...Nxd5/8. Ne4/8...Qh4/9. Ng3/9...Bg4

=Two Knights Defence:Fritz variation= 9 ... Bg4 Attacking the White Queen. A slightly startling move as after 10. f3 Black has two piece hanging.

Theory table
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 * 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 b5 6.Bf1! Nd4 7.c3 Nxd5 8.Ne4 Qh4 9. Ng3 Bg4