411 REFERENCE · Wikibooks
Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nc6/3. Bc4/3...Bc5/4. d3/4...Nf6
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Giuoco Pianissimo rd bd qd kd rd pd pd pd pd pd pd pd nd nd bd pd bl pl pl nl pl pl pl pl pl pl rl nl bl ql kl rl
4... Nf6
With 4... Nf6, Black develops the king's knight to a good square where it pressures e4, controls the d5 square, and prepares to castle kingside.
Theory table
.
1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.d3 Nf6
5
6
Nc3d6
Bg5h6
Bg5h6
Bh4d6
References