Tactical Course Blockade

A blockade in chess prevents an opposing pawn or piece from advancing or reaching an important square. The most familiar example is placing a piece directly in front of an enemy pawn, stopping its progress. This is especially important against passed pawns, where a successful blockade can prevent the pawn from reaching its promotion square.

In tactical positions, however, a blockade can have a much more immediate purpose. Instead of simply restricting a pawn, a player may deliberately occupy or control a critical square to limit the movement of an important enemy piece.

The king is a frequent target. By taking away an escape square, a blockade can restrict the king to such an extent that a mating attack becomes possible. A sacrifice may even be used to force an opposing piece onto a particular square, where that piece then blocks its own king’s escape.

The same principle can be used against the queen or other valuable pieces. If their available squares are progressively taken away, they may become trapped and eventually lost.

Blockading ideas can also interfere with the opponent’s defence. A piece may be prevented from reaching the part of the board where it is needed, leaving the king or another important target insufficiently protected. Pawn chains can have a similar effect by restricting pieces and limiting their access to useful squares.

Not every blockade is intended to win. In some positions, tactical sacrifices can create a stalemate, leaving the player’s own king with no legal move and saving an otherwise lost game. Blockading ideas can also contribute to a fortress in which the opponent has a material advantage but cannot make progress.

The essential tactical idea is therefore broader than simply stopping a pawn:

A blockade uses occupation or control of critical squares to restrict movement.

When solving the positions below, look particularly for which square must be blocked, which enemy piece needs that square and what becomes possible once its movement has been restricted.

Solutions in Chess Board