Passed pawn — what it means in chess
A pawn with no enemy pawns able to stop it from promoting.
A pawn with no enemy pawns able to stop it from promoting.
[[board startfen="6k1/ppp5/8/PPP5/8/8/8/6K1 w - - 0 1" caption="Three pawns face three — and White queens by force. Two pawns sacrifice themselves so the third can pass, the most famous breakthrough in chess. The Black king, outside the square, never gets a vote." pgn="b6 axb6 c6 bxc6 a6 Kf7 a7 Ke7 a8=Q" notes="No pawn here is passed — yet. Each White pawn faces a Black counterpart. Watch three become one. The center pawn thrusts between the defenders — the offer that cannot be refused profitably. Black takes with the a-pawn, and the a-file loses its doorman. The second thrust, same idea, other side. Black takes again — and now look at the a-file: nothing Black owns stands on it or beside it ahead of White's a-pawn. The survivor advances, passed at last: no enemy pawn on its file or the files beside it can ever block or capture it. The king sprints — but it started outside the square, and geometry has no mercy. On it comes. One step short. A queen. Two pawns died to make one immortal, and the count was knowable from the first diagram."]]
A passed pawn has no enemy pawn ahead of it on its own file or either adjacent file — nothing but pieces can ever stop it walking to promotion. That definition makes it the endgame's most important object: every other advantage is a means, but a passed pawn is an ending, a road with a queen at the far end. Nimzowitsch called it a criminal that must be kept under lock and key, and the whole defensive doctrine — blockade it, preferably with a knight, on the square directly in front — follows from taking the threat seriously before it moves.
The Endgame Society glossary defines more than 240 chess terms — rules, notation, tactics, strategy, pawn structures, endgames, and openings — in language a beginner can act on rather than dictionary shorthand.