The Immortal Zugzwang Game

“The Immortal Zugzwang Game” is the only widely-named chess game whose title refers to the position at the end rather than to a combination within it. Aron Nimzowitsch played the Queen’s Indian Defense against Friedrich Saemisch in Copenhagen in March 1923. After 25 moves, Saemisch resigned not because of any direct threat — but because every legal move he had on the board would worsen his position. He had been strategically restrained into zugzwang in the middlegame.

The game is the most-cited example in Nimzowitsch’s own My System — the book that introduced the modern theory of prophylaxis, restraint, and the blockade. Nimzowitsch is documenting his own creation in real-time: a position where every white move loses material or weakens the structure further.

The restraint method

The opening produces a Queen’s Indian setup that Nimzowitsch handles with a series of slow improving moves. By move 20, Black’s pieces are all active; White’s pieces are passive. Nimzowitsch then opens the position with 20…fxe4 and the sacrifice 21…Rxf2 — but the sacrifice is not for direct attack. It’s to fix the white king’s position and complete the strangulation.

By move 25, the position is this: White has Queen, Knight, Rook, Rook, Bishop, plus several pawns. Black has fewer pieces. But every white piece is tied to defending something specific. The queen guards e3 (prevents …Bf4 winning the queen). The bishop on d2 guards b4 (prevents losing a knight). The rook on e1 cannot move. The other rook cannot move. The knight on b1 cannot move. The king is stuck on h1.

Any pawn move loses material. Any piece move loses material. White is in zugzwang in a position with twenty pieces still on the board.

Saemisch resigned. The game has appeared in every serious chess strategy book since. The principle Nimzowitsch demonstrated — restriction creates zugzwang — is now one of the foundations of modern positional play.