Opening Traps/know them from both sides/C57–C58/You play Black

Fried Liver Attack

A knight lands on f7 and the king walks. Learn to spring it — and to never be its victim.

Coachedanswers the move you actually played

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Variations4 of 5

The Fried Liver, executedFoundation10 moves·425 master games Polerio Defence — 5...Na5!as BlackStructure10 moves·6,374 master games Surviving it as Blackas BlackMastery11 moves Traxler Counterattackas BlackMasteryBlack's counter-trap: ignore f7, offer the bishop, and hunt the white king instead. Objectively risky — practically lethal against the greedy.10 moves·514 master games Deep dive — the attack cashes inFoundation12 moves·425 master games

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514 master games after 4...Bc5· White 40%· Draw 18%· Black 42%

1.2.3.4.5.6.7.8.9.10.

StartBefore the first move

The starting position. White moves first — and that single tempo is the whole reason opening theory exists.

The moves in the text are buttons — press one and the board beside it shows the position.

The idea in one paragraph

After two white pieces attack f7 and only the king defends it. Everything in this chapter is the argument about that square: Black must block the bishop's diagonal with , and the whole trap is what happens to players who recapture on d5 with the knight afterwards — drags the king into the middle of the board on move six. This page teaches the attack from White's chair and the two answers from Black's: the defence that avoids it and the counterattack that ignores it.

The pawn structure

There is no pawn structure to study — that is the point. The centre opens on move five, the e-file and the a2–g8 diagonal are the terrain, and the position is decided by piece activity against a king that has lost the right to castle. The one fixed feature is the d5 square: White's attack is exactly as strong as the pressure on it.

The plans

♔ White’s plans

Spring it only in the right order: , and only after Black has recaptured with the knight. One move early, and the same sacrifice simply loses a piece.
After , pile everything onto the pinned knight: Nc3, d4, Bg5 or O-O — count the defenders of d5 every single move.
Keep lines opening while the king is in the middle: d4 hits e5 so that a capture opens the d-file, and castling long puts the last rook on it.
Against the Traxler , refuse the bait: wins a clean pawn with the king stuck on e7. Taking with the knight is what Black is praying for.

♚ Black’s plans

Meet with — the only good move, and the reason it works is that it blocks the c4-bishop, which is what makes ...Kxf7 a legal answer to the sacrifice.
Play , the Polerio Defence: give the d5-pawn back, chase the bishop with ...c6, and take over the game with a lead in development. This is the move that makes the whole Fried Liver a museum piece.
If you do land in the attack, defend by counting: keep three defenders on d5, prefer moves that defend by attacking — hits c2 while it guards d5 — and walk the king to d7 and home the moment White stops for breath.
As a counter-trap, the Traxler offers a whole bishop — objectively White stands better by taking with the bishop, but the player who grabs with the knight is defending against mate four moves later.

Traps and things that lose games

The Fried Liver itself

and the king must come forward — gives the piece back, is mate in three.

Trap 2

The same sacrifice one move early — before Black recaptures — loses a piece for a pawn: with the pawn still on d5 the bishop's diagonal is blocked and ...Kxf7 is simply legal.

The Traxler tripwire

after , the greedy walks into and it is White's king that gets hunted.

Trap 4

recaptures with the wrong piece: wins the queen, because the bishop on c4 was watching d5 the whole time.

Everyone below about 1400 meets 4.Ng5 constantly, from both chairs. Learn it as White for the games it wins outright, and as Black so that a ten-move loss can never happen to you. It is also the best first lesson in attacking an uncastled king.

Your learning path — Fried Liver Attack

Beginner → Intermediate

One square, three chapters: spring the attack as White, defuse it as Black, and know the counter-trap from both chairs.

FoundationYour first session
Goal. Own the move order as White and never lose to it as Black.
- The order that makes the sacrifice work: Ng5 hits f7, ...d5 blocks, exd5, and Nxf7 only after ...Nxd5. One move early and it loses a piece.
- Why 4...d5 is the only defence: it is not about defending f7, it is about making ...Kxf7 legal.
- The two declines that lose on the spot: a king move drops the queen to Nxd8, a queen move drops the rook to Nxh8.
DrillPlay the main line twenty times as White against an engine on low strength. Then flip the board and play 4...d5 5.exd5 Na5 twenty times as Black. The point is that neither side ever has to think before move six.
Common mistakePlaying 5.Nxf7 before Black has recaptured on d5. Count it every time: if the pawn still stands on d5, the bishop does not see f7 and the sacrifice is just a lost piece.
Move on whenYou can say, without the board, why the sacrifice works after 5...Nxd5 and fails after 4...d5.
StructureWeek two
Goal. Make the Polerio your automatic answer as Black.
- The Polerio sequence to move ten: 5...Na5 6.Bb5+ c6 7.dxc6 bxc6 8.Be2 h6 9.Nf3 e4 10.Ne5 Bd6 — every Black move develops or attacks.
- What the pawn bought: the bishop that owned f7 is on e2 blocking its own pieces, and Black's lead in development is permanent.
- Which White deviations matter: 6.d3 and 6.Be2 decline the argument, and Black simply stands well.
DrillDrill the Polerio line until the ...c6 fork and the ...e4 kick are reflexes. Then play it against an engine that varies White's sixth move.
Common mistakeTrying to hold the d5-pawn with ...c6 before ...Na5. The pawn is the price of the position — pay it.
Move on whenYou reach move ten of the Polerio from memory and can name what each Black move attacked.
MasteryWhen the pattern is automatic
Goal. Survive the attack from inside, and carry the counter-trap.
- The survival line: 8...Nb4! and the defend-by-attacking rule, then the king walk to d7 once the checks stop.
- The Traxler from Black's chair: the forced attack after 5.Nxf7 Bxf2+, and the honest verdict against 5.Bxf7+.
- The Traxler from White's chair: one move — 5.Bxf7+! — and the discipline to play the pawn-up middlegame instead of the brilliancy.
DrillSet the position after 8.Nc3 and defend it as Black against the engine, once with 8...Nce7 and once with 8...Nb4. Lose it a few times; the defensive rules only stick after the king has been mated on e6.
Common mistakeLearning the Traxler's fireworks and not the refutation. Half the players who face your Traxler will play 5.Bxf7+, and you need a plan for a long game a pawn down.
Move on whenYou have won with the attack as White, held it as Black, and know which chair you would rather be sitting in.

Whose games to study

Polerio's own analysis is four centuries old and still the last word on 5...Na5. For the attack, any collection of miniatures in the Two Knights; for the Traxler, the correspondence games of Karel Traxler himself.

What to learn after this

The Italian Game chapter is this opening grown up: the same bishop, the same square, and the slow version of the same argument.