Chessy
King's Gambit Accepted: MacLeod Defense 4.Bb5 – Playing Black
The King's Gambit is one of those openings where White hopes to blow you off the board fast. In the MacLeod Defense with 4.Bb5, White pins your knight and waits to see how you respond. The stats say you should be happy about that. Across nearly 8,000 games, Black scores a solid 51.0% from this position — and Stockfish rates it -1.25, a clear advantage for Black. That means you are clearly better here. The trick is choosing the right setup and not letting White off the hook with a careless move. The drill below will show you exactly how to keep the pressure on.
Play the King's Gambit Accepted: MacLeod Defense: Bb5 against the engine
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White has gambitted a pawn and now pins your knight, hoping to disrupt your development. Your big weapon is the g5-pawn. That pawn isn't just an extra tempo — it chases White's f3-knight, gains space on the kingside, and sets up a potential home for your dark-squared bishop on g7. If White castles kingside, that bishop becomes a monster staring at the h8-a1 diagonal. Your two main jobs here are: (1) keep the extra pawn safe without getting your king stuck in the centre, and (2) finish development so the bishop on g7 can punish any slow moves from White.
The Engine's Favourite: 5.O-O
Stockfish thinks White's best try is 5.O-O, immediately getting the king out of the centre. The recommended follow-up is 5...Bg7 6.Nc3 h6. Let's break down Black's ideas here: the bishop goes to g7 to control the long diagonal, and h6 gives the g5-pawn a defender and stops Ng5 tricks. White has no immediate threat, so you can calmly finish development. If White ever plays d4, you'll have ...d6 or ...Nf6 ready. The statistics back this up — in 2,219 games where White played 5.O-O, White only scored 49.3%, meaning Black wins more often than not.
Punishing White's Common Mistakes
The most popular reply, 5.Bxc6 (2,290 games), is actually an inaccuracy that loses about 1.0 pawns worth of advantage. White trades the bishop for your knight, but after ...dxc6, your centre is solid, you have the bishop pair, and your g5-pawn still cramps the kingside. The engine says 5.O-O was better. Another inaccuracy is 5.h4 (580 games, loses ~0.9 pawns). White tries to attack the g5-pawn, but you can simply ...h6 or ...g4, winning time. The worst offender is 5.d3 (384 games), which the engine calls a mistake (~1.1 pawns lost). White meekly defends the e4-pawn, allowing you to develop freely with ...Bg7 and ...d6. Keep an eye out for these — if White plays one of them, you can push your advantage more aggressively.
What the Numbers Say
Let the stats shape your confidence, not your play. From this position across 7,953 Lichess games: Black wins 51.0%, White wins 46.4%, and draws are rare at 2.6%. That win rate is not an accident — the position favours Black by a clear margin. The most dangerous move White can play is 5.O-O (49.3% White score), but even that gives Black the better chances. The least effective move for White is 5.d3 (42.2% White score), which you should punish ruthlessly. Remember: your advantage comes from development and the bishop on g7, not from rushing to cash in the extra pawn. Build your position first, and the win will follow.
Results across 7,953 Lichess games
| Most-played continuation | Games | White wins |
|---|---|---|
| Bxc6 | 2,290 | 44.0% |
| O-O | 2,219 | 49.3% |
| d4 | 1,561 | 48.1% |
| h4 | 580 | 46.9% |
| h3 | 545 | 45.1% |
| d3 | 384 | 42.2% |
Frequently asked questions
Is the MacLeod Defense 4.Bb5 a good line for Black in the King's Gambit?
Yes, the statistics and engine evaluation both agree that Black is doing well. Stockfish gives -1.25, a clear edge for Black, and Black scores 51.0% in practice. The g5-pawn gives Black active play, and White has to be careful not to fall into one of the known inaccuracies.
What is White's best move after 4...g5 in this line?
The engine recommends 5.O-O, immediately getting the king to safety. From there, Black replies 5...Bg7 6.Nc3 h6, solidifying the extra pawn and preparing to finish development. White scores only 49.3% after 5.O-O, so Black still holds the advantage.
Should Black play 5...Bg7 or something else after 5.O-O?
5...Bg7 is the engine's recommendation and the most principled move. It puts the bishop on the long diagonal where it will be a powerhouse after White castles. Follow up with 6...h6 to protect the g5-pawn, and you'll have a comfortable position with a lasting edge.
What happens if White plays 5.Bxc6 instead of castling?
5.Bxc6 is an inaccuracy that costs White about 1.0 pawns of advantage. After ...dxc6, Black has the bishop pair, a solid centre, and the g5-pawn still cramps White's kingside. You should be happy to see this move — it makes your life easier.