Hanging pieces

Ask the engine to tag every mistake in a few thousand club games and one label wins by a mile: a piece left where the opponent can simply take it. Not a deep tactic. Not a missed combination. A knight on a square nobody was watching. The pattern page has the numbers by rating band; the short version is that between 1000 and 1600 it decides more games than everything else combined.

You already know what a hanging piece is. The problem is that knowing has never stopped anyone. What stops it is a habit you run every move, and a clear idea of the three ways a piece that “looks fine” is actually loose.

What hanging means, exactly

A piece hangs when it is attacked more times than it is defended, or attacked at all and defended zero times. Count. Attackers on one side, defenders on the other. If attackers win, the piece is hanging, whatever it looks like.

Counting sounds childish. It is also the thing strong players do without noticing, and the thing club players skip when they are excited about their own idea.

The three disguises

A piece rarely hangs in plain sight. It hangs in one of three disguises.

1. Defended by a piece that cannot actually recapture. A defender that is pinned, or that would be captured first, is not a defender. Count it as zero. The classic case is a knight defended by a pinned knight: on paper it is covered, in the game it is gone.

2. Defended enough right now, and then you move the defender. Most hanging pieces were defended one move earlier. Then the player moved the defender to do something else. The question that catches this is not “is my piece defended” but "what did my last move stop defending?"

3. Attacked by a piece that also attacks something else. You count one attacker and one defender and call it safe. But the attacker is a knight that also hits your rook, or a queen that also hits a pawn. The piece is fine; the position is not. That is the next article, loose pieces and forks.

Why it happens to you specifically

It is never “I forgot the rules”. It is one of these, and it is worth knowing which is yours:

• You were looking at your own plan. The move felt good, so you played it. Attack players hang pieces more than defenders do.
• You were short on time. Counting is the first thing that goes when the clock is low. The pattern page shows the mistake rate by speed; in bullet it is not even close.
• You had just won something. A piece up, the guard drops. The next article on converting a winning position is about exactly this.

The pattern page can tell you which one it is for you, by looking at where in the game and at what clock your tags cluster.

The tell

A piece of yours that is on a square attacked by an enemy piece of lower value, or a piece that has exactly one defender, is a piece to look at before every move. Those are the ones that go.

The habit

Before you release a move, one question, always the same words: "After this move, what of mine can be taken?" Not “is this a good move”. Not “what is my plan”. What can be taken. You will answer it in two seconds nine times out of ten. The tenth time is the game.

Then run it on your own games. Every hanging-piece tag in your history is a position you can be put back in, and asked again.