Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nc6/3. Bc4/3...Nf6

3... Nf6 – Two Knights Defence
The Black Knight move 3... Nf6 announces the Two Knights; this aggressive defence results in open and often complex play. David Bronstein suggested that the term "Chigorin's Counterattack" would be more appropriate and this is certainly borne out with current theory. The Two Knights has been adopted as Black by many aggressive players including Chigorin and Keres, and World Champions Tal and Boris Spassky.

Theory table
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 * 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6

Statistics

 * Estimated next move popularity
 * d3 47%, Ng5 24%, d4 15%, Nc3 10%, O-O 2%, Qe2 1%