Legal's Mate — the queen sacrifice that wins with three minor pieces
Learn the trap that has been catching greedy opponents since 1750.
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What is Legal's Mate?
What is Legal's mate in chess? It is an opening trap that features a brilliant queen sacrifice. White allows Black to capture the queen to deliver a stunning two-move checkmate with two knights and a bishop.
How It Works — Step by Step
The pin that enables the trap
Black has just pinned the f3-knight against the queen with Bg4. The pin looks strong — but it is exactly the precondition for Legal's Mate. White is about to demonstrate, in spectacular fashion, that the 'pinned' knight can move anyway.
Nxe5!? — the queen sacrifice
White ignores the pin and plays Nxe5!, apparently leaving the queen hanging. If Black greedily grabs it with Bxd1, the trap snaps shut. The correct reply is Nxe5! — taking the knight, not the queen — after which White has nothing better than regaining the piece. This is the critical moment.
Bxf7+ — the king is dragged out
Black took the queen — now comes the punishment: Bxf7+!. The bishop is protected by the e5-knight, so the king cannot capture it. Ke7 is the only legal move, and the black king is dragged into the mating net.
Nd5# — checkmate
Nd5# — checkmate with three minor pieces. Every escape is covered: the f7-bishop seals e8 and e6, the e5-knight guards d7, the d5-knight covers f6, and d8 is blocked by Black's own queen. The queen 'sacrifice' was never a sacrifice at all.
Common Misconceptions
Legal's mate is a foolproof trick that always wins the queen or the game.
It is not foolproof. If White doesn't prepare it correctly (usually by playing h3 first), Black can respond to Nxe5 with ...Nxe5. Instead of taking the queen, Black wins a full piece.
Can You Spot It?
Test yourself with these positions
Legal's Final Blow
Deliver the final blow.
Test Your Skills
Find the winning move in each position
Execute the Mate - The opponent just greedily took your queen on d1. Deliver the first move of the checkmate.
Is it Safe? - A position where the pin exists, but the Legal's mate sacrifice does *not* work immediately because ...Nxe5 refutes it. Find the correct developing move instead.
Famous Legal's Mate Games
The original game played at the Café de la Régence in Paris, from which this trap gets its name.
Tips for Club Players
Before playing Nxe5, ask yourself: 'What if they just take my knight on e5 instead of the queen?'
Playing h3 to force the bishop to h5 is usually the necessary preparation for Legal's trap.
Frequently Asked Questions
Everything you need to know about Legal's Mate
Legal's mate is an opening trap involving a queen sacrifice. White allows Black to capture the queen, setting up a forced two-move checkmate using two knights and a bishop.
You do Legal's mate by allowing the opponent to pin your f3 knight with their bishop, then sacrificing your queen with Nxe5. When they take the queen, you play Bxf7+ followed by Nd5#.
No, Legal's mate does not always work. If White plays Nxe5 without proper preparation, Black can simply play ...Nxe5. This defends the bishop and leaves Black up a piece.
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