Allgaier Gambit: Adviser, Diagrams and Replay Lab

The Allgaier Gambit is a King's Gambit Accepted line beginning 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ng5. White often sacrifices the knight with Nxf7 after ...h6. Use the Allgaier Start Diagram.

The exact anchor is 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ng5. The classic sacrifice continues 5...h6 6.Nxf7 Kxf7. Use the Allgaier Start and Nxf7 Sacrifice diagrams.

Yes. It is a sharp 3.Nf3 g5 4.h4 g4 branch inside the King's Gambit Accepted. Use the Branch Map to return to the KGA parent page.

Yes. Both arise after 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4, but Kieseritzky uses 5.Ne5 while Allgaier uses 5.Ng5. Use the Branch Map to compare the Kieseritzky page.

White plays 5.Ng5 to threaten Nxf7 and drag Black's king into the open. It is much more sacrificial than the 5.Ne5 Kieseritzky route. Use the Allgaier Start Diagram.

White sacrifices on f7 to remove the f7 pawn, expose Black's king, and gain attacking chances with development and checks. Use the Nxf7 Sacrifice Diagram.

It is a very risky practical gambit. The supplied games show spectacular White wins and also several Black wins where the extra material and exposed White king matter. Use the Replay Lab to compare both outcomes.

It can be dangerous in club play if White knows the attacking patterns and Black is unprepared. It is risky if White only remembers the sacrifice. Use the Adviser before choosing it.

After 5...h6, White usually plays 6.Nxf7, entering the true Allgaier sacrifice. Black normally accepts with 6...Kxf7. Use the 5...h6 Test Diagram.

After 6.Nxf7, White sacrifices a knight to expose Black's king. If Black accepts, White must play energetically with development and checks. Use the Nxf7 Sacrifice Diagram.

Black can accept with 6...Kxf7, but must survive White's initiative. The exposed king is playable only if Black develops accurately. Use the Kxf7 Acceptance Diagram.

After 6.Nxf7 Kxf7 7.Nc3 d5, Black fights back in the centre while the king is exposed. This is one of the key practical structures. Use the Nc3 and d5 Diagram.

Bc4+ is a natural way for White to bring a bishop into the attack and force Black's king to make decisions. Use the Bc4+ Attack Diagram.

Instead of 5...h6, Black can counter immediately with 5...d5. This avoids the pure Allgaier sacrifice and challenges White's centre. Use the 5...d5 Counter Diagram.

5...Nf6 is another way to avoid the pure ...h6 Nxf7 structure, often transposing into practical King's Gambit positions. Use the Replay Lab's Nf6 group.

5...f6 attacks the knight route directly and can create independent anti-Allgaier positions. Use the Anti-Allgaier replay group.

White wants to combine the exposed black king, rapid development, central breaks and checks before Black consolidates. Use the Adviser with side set to White.

Black wants to accept only when ready to return material, fight in the centre and complete development. Use the Adviser with side set to Black.

No. Nxf7 is the Allgaier trademark, but White should understand the follow-up. Without rapid development, the knight sacrifice is just lost material. Use the Nxf7 Sacrifice Diagram.

Bc4+ is often natural because it develops with tempo against the exposed king. It must be coordinated with the queen and centre. Use the Bc4+ Attack Diagram.

Yes, ...d5 is one of Black's most important defensive resources because it challenges White before the attack becomes organised. Use the Nc3 and d5 Diagram.

White's biggest mistake is sacrificing on f7 and then failing to develop with tempo. The attack must justify the missing knight. Use the Adviser with problem set to attack.

Black's biggest mistake is accepting the sacrifice and then moving the king repeatedly without central counterplay. Use the 5...d5 Counter and Nc3 and d5 diagrams.

The final move shows the practical purpose of the position, and the page arrows point from that final move's start square to its end square. Use the diagram grid as your move-order checklist.

Start with Bosboom vs Teichmann for a full Allgaier attacking win, then compare Weber vs Zsinka or Depasquale vs Han for Black's defensive resources. Use the Replay Lab selector.

Bosboom vs Teichmann, Illescas Cordoba vs Bevia, Zuse vs Ketterer, Meyer vs Nogly and Thoren vs Moberg show the classic Nxf7 sacrifice. Use the main sacrifice replay groups.

Weber vs Zsinka, Felegyhazi vs Barva, Lukes vs Klicnar, Zelic vs Zufic, Zelic vs Doric and Depasquale vs Han show Black defensive resources. Use the Black wins replay group.

Weber vs Zsinka, Weidemann vs Semina, Thoren vs Unmack, Okladnikov vs Vasiliev and Depasquale vs Han show ...d5 counterplay. Use the d5 counter-centre group.

Maslak vs Vlasov and Lukes vs Muron show alternatives such as ...f6 or ...Qe7 after Ng5. Use the Anti-Allgaier alternatives group.

Bosboom vs Teichmann and Illescas Cordoba vs Bevia are useful first White models because they show fast attacking conversion. Use the White wins replay group.

Weber vs Zsinka and Depasquale vs Han are useful Black-player models because they show how central counterplay can punish the sacrifice. Use the Black wins replay group.

No. Start with one White win, one Black win, one ...d5 counter game and one anti-Allgaier alternative. Use the Replay Lab optgroups.

White should play it if they enjoy sacrificial attacking chess and are willing to study concrete follow-ups. Use the Adviser with side set to White.

Black can allow it with preparation, especially by knowing when to accept on f7 and when to counter with ...d5. Use the Adviser with side set to Black.

Yes, it can be dangerous in blitz because the sacrifice creates immediate practical problems. Use the White wins replay group.

It is playable as a surprise, but classical time gives Black more chances to find central counterplay and defensive resources. Use the Black wins replay group before using it seriously.

Yes. 5.Ng5 is much more sacrificial because it often leads to Nxf7 and a missing knight. Compare this page with the Kieseritzky Branch Map link.

White should prepare 5...h6, 6.Nxf7, 6...Kxf7, ...d5, Bc4+ attacks and anti-Allgaier alternatives. Use the diagram grid as your checklist.

Black should prepare the acceptance line, the immediate ...d5 counter, and anti-Allgaier choices such as ...Nf6, ...Qe7 or ...f6. Use the Adviser with goal set to Black defence.

After this page, study the King's Gambit Accepted parent, Kieseritzky Gambit, Classical Variation, Bishop's Gambit and King's Gambit Declined pages. Use the Branch Map links.