The Immortal Game is the most famous chess game ever played. On 21 June 1851, Adolf Anderssen gave away his queen, both rooks, and a bishop — and still delivered checkmate. He did it against Lionel Kieseritzky, one of the strongest players in Europe, in an informal game at Simpson’s Divan in London’s Strand. When the moves were published four years later by Austrian master Ernst Falkbeer, he called it “Unsterbliche Partie” — the Immortal Game. The name stuck, and in 170 years, nobody has found a better one.
To understand why this game matters, you need to understand what made it shocking in 1851. Deliberately leaving major pieces en prise for multiple moves was not a recognised strategy — it was considered a blunder. The material advantage was expected to be close to decisive. What Anderssen showed, through 23 moves of escalating sacrifice and ruthless calculation, was that king safety could override all material considerations entirely. If the king could not escape, a queen watching from the other side of the board was worthless.
What was the context of the Immortal Game?
The Immortal Game was played during the summer of the first international chess tournament in history. Wikipedia’s account of the Immortal Game records that the game was played on 21 June 1851 at Simpson’s Divan — the famous chess café on the Strand in central London — as an informal game between rounds of the formal London 1851 invitation tournament. Neither player was competing for prize money or a title. It was two masters sitting across a café table, playing chess.
Adolf Anderssen (1818–1879) was a German mathematics teacher from Breslau who had made a name for himself in European chess throughout the 1840s without quite achieving international fame. The London 1851 tournament was his international debut. He won it decisively, defeating Howard Staunton, Carl Mayet, Elijah Williams, and others in succession. His style was aggressive and combinatorial: he calculated deep into tactical complications and was willing to sacrifice material whenever the initiative justified it.
According to Wikipedia’s biography of Lionel Kieseritzky, he was a Latvian-born chess teacher living in Paris, known as one of the strongest regulars at the Café de la Régence — the most famous chess salon in the world at the time. He was no weak opponent. Before the informal game against Anderssen, he was ranked among the top five players in the world, and his own attacking instincts should have equipped him to recognise what was coming.
According to chessgames.com’s record of the game, Kieseritzky was so stunned by the position that he telegraphed the moves to his chess club in Paris immediately after the game ended. That detail reveals a great deal: in the middle of the Great Exhibition summer in London, surrounded by the noise of the world’s biggest event, Kieseritzky understood immediately that what had just happened to him was worth transmitting across the English Channel.
How did the Immortal Game unfold move by move?
The game opens with the King’s Gambit: 1.e4 e5 2.f4 exf4. Anderssen offers a pawn on f4 to gain rapid development and a kingside attack. Kieseritzky accepts — in 1851, declining the King’s Gambit was considered somewhat passive, even cowardly. Anderssen continues with 3.Bc4, the Bishop’s Gambit, pointing the bishop at the f7 pawn. Kieseritzky responds with 3…Qh4+, an aggressive queen sortie that attacks e4 and forces the white king off the castling line: 4.Kf1. From the very first moves, both players are navigating unstable, double-edged complications.
The critical gambit within a gambit arrives at move 4…b5. Kieseritzky pushes the b-pawn to b5, offering it as a second sacrifice to deflect the c4 bishop from defending the center. Anderssen accepts: 5.Bxb5. White now has a piece far from the kingside, a king stuck on f1 with no castling rights, and a structural weakness on the f-file. The compensation is the initiative — and Anderssen intends to use it immediately.
After 5…Nf6 6.Nf3 Qh6 7.d3, the position settles briefly into development. Then 7…Nh5 — Kieseritzky moves his knight from f6 to h5, aiming for g3 and attempting to exploit White’s exposed king. Anderssen responds with the precise 8.Nh4, threatening to trap the Black queen or exchange knights favorably, forcing 8…Qg5 9.Nf5, planting a knight on the powerful f5 square. Black plays 9…c6, challenging the b5 bishop and trying to undermine White’s structure.
Move 10.g4 is White’s commitment to the kingside attack. The g-pawn advances to chase the h5 knight, and Kieseritzky retreats: 10…Nf6. Then Anderssen plays the move that makes the middlegame position so peculiar: 11.Rg1. The rook comes to g1 to support a future g5 advance and to control the g-file — but the g4 pawn that just advanced has opened a diagonal. The rook on g1 appears to be left undefended, accessible to Black’s queen. Kieseritzky takes the opportunity to pocket the b5 bishop instead: 11…cxb5.
From here, the tactical sequence accelerates. Moves 12.h4 Qg6 13.h5 Qg5 chase the queen backward while White builds the attack. After 14.Qf3 Ng8 (Kieseritzky’s knight retreats all the way to g8 — a sign that his position is becoming passive), Anderssen plays 15.Bxf4, recapturing the f4 pawn with a bishop that now attacks the Black queen on g5. Black retreats the queen: 15…Qf6. Then 16.Nc3 Bc5 17.Nd5: a powerful knight centralisation on d5, and Kieseritzky, seeing the pawn on b2 apparently free, takes it: 17…Qxb2.
18.Bd6 is Anderssen’s coup. The bishop moves to d6 — blocking any retreat for the queen from b2, attacking the Black bishop on c5, and leaving both White rooks en prise simultaneously. The a1 rook can be taken by the queen. The g1 rook, abandoned since move 11, can now be reached by the Black bishop on c5 via the diagonal. Anderssen offers everything.
18…Bxg1: Kieseritzky takes the g1 rook. He could decline, but his position is already critical.
19.e5: The e-pawn advances. The a1 rook remains untouched; Anderssen ignores it.
19…Qxa1+: Black takes the a1 rook with check. White is now objectively down a queen and both rooks — three major pieces for an attack with minor pieces.
20.Ke2: The White king steps to e2.
20…Na6: Kieseritzky brings a knight to a6, perhaps trying to organise some defence via c7.
21.Nxg7+!: The knight on f5 captures on g7, giving check. Black’s king flees to d8.
22.Qf6+!!: The queen sacrifice. Anderssen places the queen on f6, giving check along the f6–d8 diagonal. The only legal response is 22…Nxf6 — taking the queen.
23.Be7#: The bishop steps to e7. The Black king on d8 has no square. The knight on d5 covers c7 and e7 is occupied by the bishop; the knight on g7 controls e8 and f5. It is checkmate by three minor pieces against a queen, two rooks, and a bishop.
Adolf Anderssen vs Lionel Kieseritzky, London 1851
| 1. | ||
| 2. | ||
| 3. | ||
| 4. | ||
| 5. | ||
| 6. | ||
| 7. | ||
| 8. | ||
| 9. | ||
| 10. | ||
| 11. | ||
| 12. | ||
| 13. | ||
| 14. | ||
| 15. | ||
| 16. | ||
| 17. | ||
| 18. | ||
| 19. | ||
| 20. | ||
| 21. | ||
| 22. | ||
| 23. |
Why did Anderssen sacrifice three major pieces?
Anderssen’s sacrifices were not impulse decisions — they were based on a single unifying calculation: Kieseritzky’s king could not escape from the e8–d8 corridor, and once that corridor was sealed, material counted for nothing.
The key structural insight is the Black king’s confinement. After 18.Bd6, the bishop on d6 covers c7 and the knight on d5 covers f6 and b6. The Black king on e8 has only d8 as a safe square, and d8 puts it in range of the g1 rook’s file and the White queen. After Anderssen drives the king to d8 with 21.Nxg7+, the mating net requires only two White pieces to close: the queen on f6 clears the f8 escape, and the bishop on e7 delivers the coup de grâce.
Anderssen was operating on what later theorists would name king safety priority: in a position where one king is exposed and the other is safe, piece value calculations break down entirely. A queen on a1 contributes nothing to the defence of d8. Three minor pieces coordinated around d8 are worth more than six major pieces watching from the queenside.
This was genuinely new thinking in 1851. The chess of the Romantic era was already aggressive and tactical by earlier standards, but most players still used material balance as their primary yardstick. Anderssen’s willingness to sacrifice systematically — leaving two rooks en prise simultaneously for several moves — demonstrated that a player who could count squares rather than pieces could achieve results no one had seen before.
The King’s Gambit that launched this game was already a calculated material concession. Understanding why gambits can be strategically sound — and when to accept or decline them — is explored in depth in our guide to building your first opening repertoire.
Were the sacrifices objectively correct?
From a modern engine perspective, the Immortal Game is a mixture of brilliance and good fortune. Several of Kieseritzky’s moves were poor choices that made Anderssen’s task easier than it might otherwise have been.
The most critical moment is 17…Qxb2. Kieseritzky captures on b2, but more cautious play — developing with 17…Qd4, for instance, or simply castling on the previous move — would have maintained better defensive resources. Once the queen goes to b2, it becomes a spectator. Anderssen’s 18.Bd6 immediately traps it and begins the mating sequence.
Wikipedia’s analysis of the Immortal Game notes that later analysts — including grandmasters examining the position with 20th-century technique — found the combination fundamentally sound even if not optimal at every branch. The structural logic holds: the Black king on d8 cannot survive once White’s minor pieces control the surrounding squares, regardless of Black’s material advantage.
Modern engines confirm the mate is forced from move 18 onward with best play from White, though they identify alternative lines for Black that would have prolonged the game. The depth of Anderssen’s calculation — in an informal café game, without adjournment, 170 years before chess computers — remains extraordinary. He had to see 22.Qf6+ Nxf6 23.Be7# at the moment he played 18.Bd6, at the latest.
How engines changed the way we understand games like this — and what it means for historical analysis when a machine can prove in seconds what a master spent years arguing about — is the subject of how engines changed the way we play chess.
How did the game earn its name?
The name “Immortal Game” was coined by Ernst Falkbeer, an Austrian chess master and journalist. In 1855 — four years after the game was played — Falkbeer published the moves in a Viennese chess publication with the annotation “Unsterbliche Partie.” The name captured something that had been difficult to articulate: this was not merely a strong game or an elegant combination, but something categorically different from what chess had produced before.
Why did Falkbeer’s label stick? Chess games had been annotated and praised for centuries. Morphy would produce spectacular games. Steinitz would play games of deeper strategic complexity. But no other widely known game before or after 1851 features a player deliberately leaving both rooks en prise simultaneously for several consecutive moves, then sacrificing his queen to force checkmate with minor pieces alone. The game inverts chess values so completely — making the queen redundant, making two rooks worthless — that it requires a new vocabulary to describe.
Kieseritzky’s decision to telegraph the moves to Paris immediately after losing gives the game an additional documentary dimension. He was the loser, and he knew what he had witnessed. The game was historically significant before it was historically analysed. The name followed from the experience.
What was the Romantic era, and why did it produce this game?
The Immortal Game is the defining artifact of Romantic-era chess — the period from roughly the 1820s to the 1880s when attacking play, king hunts, and spectacular combinations were the primary measure of chess quality. The era valued imagination over method, initiative over structure, and the beautiful combination over the correct positional plan.
Anderssen was the central figure of that era. According to Wikipedia’s biography of Adolf Anderssen, he held the unofficial title of world’s best player for most of the period between 1851 and 1866, when Wilhelm Steinitz began to displace him. Anderssen produced a second celebrated masterpiece — the Evergreen Game against Jean Dufresne — the following year, 1852. It featured a different kind of brilliance: a queen sacrifice leading to a smothered-mate pattern, played against a weaker opponent but showing the same fearlessness about material that defines the Immortal Game.
The Romantic era’s limitation was its randomness. Players of the 1850s and 1860s were long on imagination and short on systematic theory. Anderssen himself was eventually overtaken by players — first Steinitz, then Lasker — who understood that positional advantages (space, structure, pawn breaks, piece coordination) accumulate over time into factors that no single combination can overcome. When Steinitz proved that methodical play could consistently beat brilliance, the Romantic era effectively ended, and the modern era of chess began.
The Immortal Game survives this obsolescence because it does not represent how chess is played today. It represents what chess can be when tactical imagination has no limits and the calculator in a player’s head can see twelve moves ahead in a position with no template. It is a proof of concept: with three minor pieces and the right calculation, you can deliver checkmate against a queen and two rooks.
Why Does the Immortal Game Still Matter?
The Immortal Game matters to anyone learning chess because it demonstrates the game’s deepest principle: material is a proxy for advantage, not advantage itself. When king safety collapses completely, the proxy breaks down — a queen on a1 and a queen on f6 are not the same piece.
That lesson is harder to absorb from a textbook list of principles than from watching Anderssen execute it in 23 moves. The game is, in this sense, a teaching tool that has survived for 175 years because it is unforgettable. You see 22.Qf6+ Nxf6 23.Be7# once and you do not forget that the king — and its safety — is the only piece that matters when it matters most.
If you want to step through every move yourself, pause at each critical junction, and turn on an engine at the moments that puzzle you, open the Immortal Game in PGNBase. You can load the full PGN, follow Anderssen’s sacrificial sequence at your own pace, and see exactly what a modern engine makes of each decision. One game, 23 moves, and one of the clearest demonstrations in chess history of what king safety actually means.
Conclusion
The Immortal Game is not famous because it was the strongest chess game ever played. By modern engine standards, both players made mistakes. It is famous because it was the most vivid.
On 21 June 1851, Adolf Anderssen gave away almost everything he had on the chessboard — and won. He showed that a queen was worth nothing if it was pointing at the wrong side of the board, and that a bishop on e7 could do what three major pieces could not. Ernst Falkbeer called it immortal in 1855, and nobody has found a better word in the 170 years since.
The name endures because the game endures: 23 moves, three minor pieces, and one of the most complete arguments in chess history that king safety is the only thing that truly matters when it matters most.