Donald Byrne vs. Bobby Fischer (1956): the 'Game of the Century' sacrifice explained

On October 17, 1956, at the Marshall Chess Club in New York, 26-year-old International Master Donald Byrne faced 13-year-old Bobby Fischer in the Rosenwald Memorial Tournament. Hans Kmoch dubbed the game “The Game of the Century,” and it remains one of the clearest demonstrations in chess history of why piece activity and king safety outweigh raw material.

You can watch and listen to the entire game narrated move by move in our interactive player: Study Byrne–Fischer 1956 with voice & board drawings →.

The quiet mistake that invited the storm

After a Grünfeld setup, White had a pleasant central pawn on d4. On move 11, however, Donald Byrne played 11. Bg5, moving his dark-squared bishop a second time while his king still stood on e1 and his f1 bishop was still blocked at home.

Moving the same piece twice in the opening is not an automatic loss—unless the opponent has already developed their pieces and can open the centre immediately. Fischer saw that White’s uncastled king on the e-file was worth more than a quiet positional retreat.

Two shocks: 11…Na4!! and 17…Be6!!

First came 11…Na4!!, offering a knight to deflect White’s queen from guarding the e4 square and the c3 knight. After 12. Qa3 Nxc3 13. bxc3 Nxe4!, Black opened the e-file straight toward White’s king.

Six moves later came the move that made the game immortal. With his queen attacked on b6 by White’s bishop on c5, Fischer ignored his queen entirely and played 17…Be6!!

If White takes the queen with 18. Bxb6, Black does not try to win material back immediately. Instead, 18…Bxc4+ 19. Kg1 Ne2+ 20. Kf1 Nxd4+ 21. Kg1 Ne2+ 22. Kf1 Nc3+ 23. Kg1 axb6 unleashes a devastating “windmill” discovered-check mechanism that strips White’s board bare and ends in checkmate on move 41.

Compare Fischer’s sacrifice with Anderssen’s Immortal Game

A century earlier, in the Immortal Game (Anderssen–Kieseritzky, 1851), Adolf Anderssen sacrificed both rooks and his queen to deliver mate with three minor pieces. Step through the finish in the diagram above. Although played 105 years apart, both combinations rest on the exact same foundation:

1. Every attacking piece is in the game while the defender’s pieces are stuck on the queenside or the back rank.
2. The defending king never castled to safety, leaving the central files open for checks.
3. Every sacrifice gains a tempo (a check or a direct mate threat), so the defender never gets a single quiet turn to consolidate their extra material.

When you replay Byrne–Fischer 1956 in the study player, turn on Guess the Move around move 11. Before admiring the queen sacrifice on move 17, notice how Fischer’s simple developing moves (…Bg7, …O-O, …Nc6, …Re8) created the conditions where the combination became possible.