Fried Liver Attack: The Full Line and How to Defend

The Fried Liver Attack is the knight sacrifice on f7 that arises in the Two Knights Defence: after 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Nxd5, White plays 6.Nxf7, gives up a piece and drags Black's king into the centre with 6...Kxf7 7.Qf3+. In practice it is one of the most dangerous attacks in any opening, and Black's serious defence is not to allow it at all: 5...Na5.

It is one of the oldest lines in chess —it already appears in the analysis of the Italian Giulio Cesare Polerio, more than four hundred years ago— and it is still one of the first traps anyone meets after 1.e4 e5. This guide covers the whole line: how you get there, what happens after the sacrifice, why 5...Na5 is the choice of strong players and what the Traxler Counterattack is. For the bigger picture of the opening, see the Italian Game guide.

How the Fried Liver arises

It all starts in the Italian, when Black chooses the Two Knights Defence with 3...Nf6 instead of the quieter 3...Bc5. Black attacks the pawn on e4, and White replies by going straight for the weak point:

The knight and the bishop both aim at f7, which only the king defends. The threat is 5.Nxf7, winning a pawn and forking queen and rook. 4.Ng5 breaks a classical rule —don't move the same piece twice in the opening, see the opening principles for beginners— and that is exactly what gives Black time to hit back.

The natural reply is 4...d5, blocking the bishop's diagonal. After 5.exd5, Black has to decide how to win the pawn back, and that is where everything happens.

The sacrifice: what happens after 5...Nxd5

Recapturing with the knight looks like the most logical move: it regains the pawn and centralises a piece. But the knight on d5 is tied down: the bishop on c4 attacks it and nothing defends it properly once the king moves. That is when the sacrifice comes:

Black is a piece up, but the king is on e6, in front of its own pawns, and it cannot go home. It has to stay there: 7...Ke6 is the only way to keep defending the knight on d5, which is attacked twice, by the bishop and by the queen. With 8.Nc3 White adds a third attacker on d5, and the plan from here is to open the centre with d4 and bring every piece towards the black king.

An example of how quickly it ends if Black goes wrong: 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Nxd5 6.Nxf7 Kxf7 7.Qf3+ Kg8 8.Bxd5+ Be6 9.Bxe6#. Taking the king back towards the corner looks prudent and it is mate in two.

The classical defence after 8.Nc3 is 8...Ncb4: the other knight supports d5 again and threatens c2. From there the theory is long and very concrete, and modern engine analysis suggests that Black, defending perfectly, can survive. The problem is that word «perfectly»: with the clock running, over a real board, hardly anyone manages it. That is why experienced players never enter the position.

The Lolli Attack

White has another way to punish 5...Nxd5: 6.d4, the Lolli Attack. Instead of sacrificing at once, White opens the centre first, and the sacrifice on f7 remains as a threat for later. It is less spectacular, but many players consider it even more awkward for Black, because it does not hand Black an extra piece in return.

Why 5...Na5 is the serious answer

The way to avoid suffering the Fried Liver is not to recapture with the knight from f6. With 5...Na5, the knight from c6 attacks the bishop on c4, the one aiming at f7. Black gives up a pawn but gains time to develop, and White's pieces have to retreat. The main line goes like this:

Look at it from Black's side. Black is a pawn down, but:

• All of White's pieces have retreated: the bishop is on e2 and the knight, after a long walk, has ended up on e5.
• Black has the centre with the pawn on e4 and much faster development: bishops to d6 or c5, queen to c7 or d4, short castling.
• The knight on a5 is on the rim, yes, but it will come back into play via b7 or c4.

It is a classic gambit position: material against time. Theory considers it playable for both sides, and for Black it is infinitely more comfortable than defending with the king on e6.

White can also avoid 6.Bb5+ and play 6.d3, a line already played in the nineteenth century: 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.d3 h6 7.Nf3 e4 8.Qe2 Nxc4 9.dxc4 Bc5. White keeps the extra pawn; Black gets the bishop pair and quick development.

Other fifth moves

There are two less common alternatives to 5...Na5. One is 5...b5, the Ulvestad Variation, which deflects the bishop with another pawn. The other is 5...Nd4, the Fritz Variation, which threatens c2 and sets plenty of traps for White. Both are riskier than 5...Na5 and are worth studying only if you want something off the beaten track.

The Traxler Counterattack: attack instead of defending

There is a third way to meet 4.Ng5: not defending f7 at all. That is the Traxler Counterattack:

Black lets the knight into f7 and hits back at f2, the same weak point on the other side. It is named after the Czech priest Karel Traxler, who played it in 1890. If White takes with 5.Nxf7, the answer is 5...Bxf2+: after 6.Kxf2 Nxe4+, the white king is as exposed as Black's is in the Fried Liver, and the game turns into a race of attacks.

The problem is that White does not have to take with the knight. With 5.Bxf7+ Ke7, the black king loses the right to castle and White avoids the wildest part of the line. Engine analysis does not give the Traxler the same soundness as 5...Na5, which is why it is seen as a surprise weapon: very effective against someone who does not know it, risky against someone who comes prepared.

Typical mistakes

• As Black, recapturing 5...Nxd5 without knowing what is coming. It is the trap that gives the whole line its fame, and it is among the opening traps that decide the most club games.
• As Black, heading back towards castling after 7.Qf3+. The knight on d5 needs the king on e6; without it, the knight falls with check and the position collapses.
• As White, sacrificing without calculating. The Fried Liver works because all of White's pieces arrive quickly; a sacrifice with the pieces far away, or without seeing the 8...Ncb4 defence, is just a piece down. Before giving up material you have to look at the forcing moves, as explained in how to calculate in chess.
• As White, not knowing what to do after 5...Na5. Whoever plays 4.Ng5 hoping for the sacrifice and runs into the right reply ends up a pawn up with the pieces pushed back. You need to know the positions after 10.Ne5 and after 6.d3, because those are the ones that appear against opponents who know the theory.

Should you play it?

As White, 4.Ng5 is a perfectly serious choice in the Italian and leads to positions where you learn to attack and to calculate. Against opponents who do not yet know 5...Na5, the Fried Liver wins whole games; against those who do, it leads to a healthy gambit where White is a pawn up and has to know how to withstand Black's development.

As Black, the Two Knights Defence is a good choice for players who want active positions, as long as 5...Na5 and what follows are studied. If you would rather avoid all this, the way out is 3...Bc5, the Giuoco Piano, which is also covered in the Italian Game guide.

To train the king-attack motifs that appear here —the double attack, the pin on the d5 knight, the sacrifice on f7— it helps to review the tactics every player needs to know.

How to study it

First, the sacrificial line up to 8.Nc3 and the 8...Ncb4 defence, played out against a friend or an engine from both sides: you only understand the Fried Liver once you have suffered it. Next, the main line with 5...Na5, which is what you will meet most against experienced players. And finally the Traxler, as something worth recognising even if you never play it.

The course Italian Game in depth: Fegatello, gambits and d3 lines, with grandmasters Andrés Rodríguez Vila and Diego Flores, devotes two lessons to the Fried Liver Attack, then moves on to gambit lines and the d3 variations. Masterclass Chess: Ideas, Plans and Sacrifices also has a lesson on the Fegatello, alongside other thematic sacrifices and attacking plans. The lessons are taught in Spanish with English subtitles. And if you are left with a specific question about a move in these lines, you can ask a grandmaster.