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

=Giuoco Piano=

Theory table
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'''1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. O-O Nf6'''