Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nc6/3. Bc4/3...Bc5/4. d3/4...Nf6

=4. d3 Giuoco Pianissimo= White plays the Giuoco Pianissimo (Italian: "very quiet game"). This solid but passive opening more often occurs through the Bishops opening (2. Bc4) move order.

Theory table
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 * 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.d3 Nf6