# 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...Bg4/10. f3

< 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
 a b c d e f g h 8 8 7 7 6 6 5 5 4 4 3 3 2 2 1 1 a b c d e f g h
Position in Forsyth-Edwards Notation(FEN)

r3kb1r/p1p2ppp/8/1p1np3/3n2bq/2P2PN1/PP1P2PP/RNBQKB1R

# Two Knights Defence:Fritz variation

### 9. f3

Forced, no undefended squares for the White Queen to go to and 9. Be2 would lose a piece to 9...Nxe2 with threat of Nf4 and Ne2 or Nd3 mate.

## Theory table

For explanation of theory tables see theory table and for notation see algebraic notation.

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
10 11 12
1 f3
e4
cxd4
Bd6
Bxb5+
Kd8
2 f3
Bd6
cxd4
e4

Transposes to
above line