Italian Game: Giuoco Pianissimo, Normal: what to play after Bc5?

In the Italian Game: Giuoco Pianissimo, Normal (ECO C50), White's most established and highest-scoring continuation is O-O, securing the king and readying the kingside rook for central action. Engine evaluations award O-O a modest edge of +0.15, leading the 380,542 recorded games from this tabiya with a 22.7% preference (87K games). Choosing king safety keeps maximum flexibility for subsequent pawn thrusts in the center and on the flanks.

The Strategic Value of Castling

Executing O-O removes the king from the board's open central files before the position begins to clarify. This classic development move directly enables White to support the center using rook maneuvers along the e1 square. An illustrative engine continuation highlights this smooth development plan with O-O d6 c3 a6 Re1 h6, wherein White steadily prepares central reinforcement while Black stabilizes their bishop pair and kingside structure.

Flexible Move Orders with c3

The direct pawn push c3 serves as the primary alternative, appearing in 12.7% of games (48K recorded) with an evaluation of +0.13. This setup often transposes into similar structures via the continuation c3 d6 O-O a6 Re1 h6, intending to fortify d4 while offering the light-squared c4 a safe retreat square on c2 or b3 against future queenside expansion.

Prophylactic and Positional Alternatives

White also employs slower setups depending on the desired piece coordination. The prophylactic h3 is chosen in 10.0% of recorded games (38K games, evaluated at +0.10) to deny Black's minor pieces access to the g4 square, demonstrated in the line h3 a6 c3 d6 a4 h6. More modest choices include queenside space-seeking with a4 (+0.11 across 2.2K games) and the patient knight maneuver Nbd2 (+0.11 across 1.2K games), following Nbd2 d6 c3 O-O O-O a6.