1. e4 e5 2. Bc4 puts the bishop on its best diagonal before anything else is developed, aiming at f7 from move two. It is among the oldest sequences in the written record of chess, it was largely abandoned for a century, and it has returned because the positions it reaches are the ones modern players want and the move order avoids the ones they do not.
The Bishop’s Opening covers ECO C23 and C24. Its identity is unusual: many of its lines transpose into other openings, and a substantial part of its modern value lies precisely in which transpositions it permits and which it forbids.
Origins
The move appears in the earliest surviving analytical writing on modern chess. Luis Ramírez de Lucena’s work at the end of the fifteenth century and Ruy López de Segura’s in the century that followed both treat the bishop sortie as a principal continuation, and for a long period it stood alongside the King’s Gambit as a standard way to open the game.
Its decline followed the general nineteenth-century preference for 2. Nf3, which develops a piece and attacks a pawn simultaneously. Against that standard, 2. Bc4 looked slow: it makes a threat that is easy to meet and does nothing about e5. By the twentieth century the opening had become a sideline, kept alive largely by players who wanted to avoid the main roads.
Bent Larsen was among the strongest advocates of that period, and his willingness to use offbeat first moves at the highest level gave the opening a measure of respectability it had not enjoyed for decades. The full revival came later, and for reasons that had little to do with the nineteenth century.
The case for the bishop first
The point of delaying Nf3 is what it prevents. After 2. Nf3, Black has 2…Nf6, the Petrov, which is the most reliable drawing weapon in the open games and one of the most tiresome things a player with the white pieces can meet. After 2. Bc4, the Petrov does not exist.
The same logic removes several other well-analysed defences. The Ruy Lopez theory that both sides would otherwise have to know is simply absent, as is the Scotch and everything that follows 2. Nf3 Nc6. What remains is a smaller and less charted set of positions.
What White gives up is the immediate attack on e5. Black gets a free move to organise the centre, and the most testing replies use it. The compensation is that the bishop on c4 is well placed in nearly every structure that arises, so the tempo is not lost in the way it would be if the piece needed to move again.
The bishop’s aim at f7 should not be overrated. Against accurate play there is no early attack there; the diagonal matters as a long-term asset, restraining …d5 and giving White’s kingside play a permanent anchor.
Berlin, Urusov, and the Vienna Hybrid
The Berlin Defence, 2…Nf6, is Black’s most common and most natural answer, developing and attacking e4. White’s principal choices are 3. d3, entering the quiet modern main line, and 3. d4, which after 3…exd4 4. Nf3 becomes the Urusov Gambit — a genuinely dangerous line in which White sacrifices a pawn for rapid development and pressure against f7 and the centre. The Urusov has a long practical record and remains one of the sharpest ways to punish inaccurate play.
The Vienna Hybrid arises when White follows with Nc3, reaching positions that are simultaneously Bishop’s Opening and Vienna Game. This overlap is not an accident of classification: the two openings share the same central ideas and the same reluctance to commit the king’s knight, and many players treat them as a single repertoire with two entry points.
The Classical reply 2…Bc5 mirrors White’s development and leads to symmetrical positions where the fight is over who commits first. The Calabrese Countergambit and the Lewis Countergambit, both with an early …f5 or …c3 ideas, belong to the opening’s older and more speculative literature.
The modern revival
The Bishop’s Opening’s return has a specific cause: the rise of the slow Italian. Over the past two decades the most popular way to play the open games at the top level has been the setup with Bc4, d3, c3, Nbd2 and a slow kingside build-up — no early tension, long manoeuvring, and a rich middlegame.
2. Bc4 reaches that structure directly and skips the defences that would otherwise intervene. A player who wants the slow Italian middlegame but does not want to meet the Petrov, the Berlin Wall or the Marshall Attack can get there by this move order at essentially no theoretical cost.
That is the modern case, and it is a strong one. The opening is not an attempt to obtain an advantage from the second move; it is a routing decision that arrives at a good position while removing several of the opponent’s best-prepared options along the way.
How to study it
Decide which structure you are heading for. The d3 Italian-style setup and the d4 gambit lines are different openings sharing a first move, and mixing them produces incoherent play. Most players should choose the quiet setup and treat the Urusov as an occasional alternative.
Then learn the transposition map. Know which of Black’s replies allow you into the slow Italian, which lead to Vienna structures, and which keep the game independent. The Bishop’s Opening rewards knowing where the roads go more than knowing long variations along any one of them.
Finally, study the Urusov Gambit even if you intend to play quietly. It is the punishment for Black’s careless third move, it appears frequently at club level, and knowing it is what makes the quiet lines a choice rather than the only thing you can do.