411 REFERENCE · Wikibooks
Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nc6/3. Bc4/3...Nf6/4. Ng5/4...d5/5. exd5/5...Na5/6. Bb5/6...c6/7. dxc6/7...bxc6/8. Bd3/8...Nd5
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Two Knights Defence
Two Knights Defence
8...Nd5
Black's most common move, moving the knight to the center of the board which simulatenously attacking the knight on g5. Black also prepares Nf4 in the future.
White should move the knight to f3, as moving it to e4 could result in the knight being a tempo gainer after an eventual f5 by Black.
Theory table
8910Nd5Nf3
Bd6O-O
O-O
References