Pawn structure

Pawn structure is the arrangement of every pawn, viewed as if the other pieces were temporarily ignored. Because pawns move only forward and cannot retreat, their shape changes less easily than the positions of rooks, bishops, knights, or queens. It therefore creates the terrain on which the pieces operate.

The structure shows which lines are open, meaning routes not obstructed by pawns, where each side has space, which squares cannot be defended by pawns, and which advances can change the balance. A pawn break is a prepared pawn advance intended to provoke an exchange or capture and transform the shape. Closed structures, with pawns locked against one another, tend to restrict routes; open structures give pieces more paths.

What to examine

• Fixed or vulnerable pawns, such as doubled pawns or backward pawns.
• Passed pawns, with no enemy pawn between them and the last rank on their own file or either neighboring file, and majorities that may create one.
• Available pawn breaks that can open a file, diagonal, or entry route.
• Squares and lines that favor some pieces more than others.
• Possible transformations, such as moving from an isolated queen's pawn to hanging pawns.

Pawn structure guides plans, but it does not determine whether a position is good by itself. King safety, piece activity, material, meaning the number and value of the pieces and pawns, immediate threats, and whose turn it is may matter more.