Bc4

Bc4 is a chess move in algebraic notation signaling that a bishop has been placed on the c4 square. In the starting position, the bishop that can reach c4 is the light-squared bishop from f1; the other bishop from c1 cannot reach c4 without first moving along other diagonals. If two bishops could theoretically reach c4, the move would be disambiguated (for example Bfc4).

Bc4 appears most often in the Italian Game and in the King's Bishop Opening. In the Italian Game, White plays 1.e4 e5 2.Nf3 Nc6 3.Bc4, aiming for rapid development and pressure on the f7 square. The King's Bishop Opening begins with 1.e4 e5 2.Bc4 and similarly develops the bishop to c4 to exert central and kingside influence. Black responses commonly include 3...Bc5, which leads to the Giuoco Piano, or 3...Nf6, which yields the Two Knights Defense. Other lines may see Black challenging the bishop with ...d5 or responding with ...Be7 or ...g6.

Strategically, Bc4 develops a minor piece to an active square, increases control over central and diagonal lines, and often signals an intent to target f7. It supports flexible plans and can lead to rapid kingside play, but can invite counterplay if Black neutralizes the pressure with ...d5 or ...Nf6.

Historically, Bc4 has a long pedigree and remains a standard element of chess openings at all levels, valued for its straightforward development and potential for tactical opportunities on the king’s side.