An Isolated Pawn is a pawn that has no friendly pawns supporting it in adjacent columns. The most common example is isolated queen's pawn structures.

Advantages and Disadvantages

• Can provide open lines and active piece play.
• Becomes harder to defend as the game progresses into the endgame.
• Squares in front of it can become outposts for the opponent.

An isolated pawn is not a weakness on its own; what matters is whether that pawn is compensated for by active piece play.