What Is a Discovered Attack in Chess? A Beginner’s Example

A discovered attack happens when one piece moves out of the way and reveals an attack by another friendly piece behind it. A rook, bishop or queen gains a clear line toward a target. The piece that moved may make a second threat, leaving the opponent with two problems to consider.

Recognising that pattern is only the first step. The target may escape, capture the attacker or be defended. Jeremy Silman’s explanation of discovered attacks shows why the details of the position matter. The small teaching position below is an original example, not a game taken from that article.

Look for three things in a line

Find a long-range piece, a friendly piece blocking its path, and an enemy target farther along the same line. For a rook, look along a rank or file; for a bishop, along a diagonal. A queen can use either kind of line.

Ask, “If the middle piece moves, what becomes attacked?” Then ask a second question: “Where can that piece move safely and usefully?” Merely clearing the line does not guarantee that the tactic works.

Try the original teaching position

White has a king on g1, a rook on e1 and a knight on e4. Black has a king on h7 and a queen on e8. It is White to move. The knight currently blocks the rook’s route up the e-file. Use the board at the end of this article, or set up just these five pieces on a physical board.

Try 1. Ng5+: the knight moves from e4 to g5 and checks the king on h7. At the same time, the rook on e1 now attacks the queen on e8 along the open file.

Black must answer the knight’s check. In this position the queen cannot capture that knight, and a knight’s check cannot be blocked. After the legal example reply 1... Kg6, White plays 2. Rxe8 and captures the queen. Other legal king replies also leave that capture available. This example demonstrates winning material; it is not a checkmate puzzle.

On the board, advance one move at a time. After Ng5+, identify the checking piece and the newly opened attack separately before looking at Black’s reply.

Why does moving the knight to any square not work?

Return to the starting position and consider 1. Nf2? instead. That also opens the e-file, but it does not check Black’s king. Black can play 1... Qxe1+, taking the rook and checking White. The two pieces were pointing at each other once the knight moved; Black was free to act first.

This is why a discovered attack needs a reply check. Do not stop calculating when you notice the attractive line. Look for what the opponent can capture, threaten or move out of danger.

Is this a discovered check or a fork?

A discovered check means the piece behind the moving piece gives check once the line opens. In our example, the rook behind the knight attacks a queen, while the knight itself gives check. So this is a discovered attack with check by the moving piece, not a discovered check.

In a fork, one piece attacks two or more enemy pieces. Here two White pieces create different threats. Naming the pattern can help you remember it, but finding the opponent’s best reply is more important than choosing a label.

A short practice routine

1. Find the line and its blocker.

2. Choose a legal move for the blocking piece; do not leave your own king in check.

3. Identify both threats after the move.

4. Search for the opponent’s strongest reply before deciding what is won.

Use our beginner puzzle routine to practise explaining the whole sequence. If your child is ready to move from piece movement to simple tactics, book a free Project64 online demo and discuss a suitable starting level with the team.

Replay the discovered attack

White to move. First select Starting position, then use Next move to reveal the check, Black’s example reply and the rook’s capture. Return to Starting position to try again without looking at the answer.