Changes

A discovered attack is most effective when there is a vulnerable king and an unprotected other significance piece.

A discovered attack is most effective when there is a vulnerable king and an unprotected other significance piece.

An element of surprise is involved because typically the opponent does not see the attack until it is uncovered by moving the piece that was previously blocking.

An element of surprise is involved because typically the opponent does not see the attack until it is uncovered by moving the piece that was previously blocking.  In [[blitz chess]], discovered attacks can be particularly effective because an opponent has less time to spot the surprise.

Any piece can be the one moved to create a discovered attack, in contrast with skewers and pins which use only certain pieces.  Typically this results in a gain of an undefended piece, or at least an improvement in position by the side doing the discovered attack.

Any piece can be the one moved to create a discovered attack, in contrast with skewers and pins which use only certain pieces.  Typically this results in a gain of an undefended piece, or at least an improvement in position by the side doing the discovered attack.