What is a discovered attack in chess?

A discovered attack happens when a piece moves away from a line, unmasking an attack from a piece behind it. Because the moving piece usually creates a second threat — a check, a capture, or an attack on another target — the defender cannot answer both. It is one of the most decisive tactical motifs and often wins material outright.

How do I spot a discovered attack in the middlegame?

Scan for enemy pieces aligned on a rank, file, or diagonal with one of your own pieces sitting between them. Ask whether that middle piece can leave the line with a gain, such as a check or a capture. If moving it reveals an attack on a more valuable target, you have a discovered attack worth calculating in the middlegame.

What is a discovered check and why is it so powerful?

A discovered check occurs when the piece that moves away reveals a check from the piece behind it. It is especially powerful because the revealed check and the moving piece's own threat happen at the same time. The opponent is forced to respond to the check, giving you a free tempo to carry out the second threat.

What is the difference between a discovered attack and a skewer?

In a skewer, a piece attacks two enemy pieces on the same line and the defender must move the more valuable one, exposing the piece behind it. A discovered attack instead relies on a third piece clearing the line to reveal an attack. Both win material, but the discovered attack also creates a second, often simultaneous, threat from the moving piece.

What is a zwischenzug and how does it relate to discovered attacks?

A zwischenzug is an in-between move played before the expected reply, often a check or a threat that improves your position. In tactics, a discovered attack that delivers check is a forced intermezzo: your opponent must answer the check, which is exactly what makes the second threat impossible to stop. Recognizing the zwischenzug is key to finding these combinations.

Baltic Defense Puzzle (Rated 1314): Win

Baltic Defense Puzzle (Rated 1314): Win — Discovered Attack

A discovered attack occurs when a piece moves off a line, unmasking an attack from a piece behind it. It becomes a winning combination when the moving piece gives check, because the defender must answer the check before handling the revealed threat. Here that pattern traps the enemy queen in the middlegame: the bishop lands with check, the king must react, and the opened line then collects the queen — a decisive material gain for a single bishop.