Moving to an undefended square

Moving to an undefended square is a candidate move that puts the piece on a square none of its own pieces protect. The piece may look active. After it lands, it has no defender.

Why you should notice it

A hanging piece is often created by the move itself. You chose the square for development, a check, or a recapture. The question is whether anything still covers that piece once it is there.

When to check it

This is a blunder check. An orange arrow shows the candidate. The board stays on the current position. Ask: after that piece lands, is it defended? You also train the opponent’s move the same way.

Listing current undefended pieces is a different job: that scan looks at the position now. This check asks whether *this move* leaves the mover itself undefended. Abandoned defence asks whether teammates lose protection when the piece leaves.

Why players miss it during games

Puzzle positions often start after the hang, with the piece already loose. WayChess trains the moment before you play the move.

How WayChess trains it

You mark the destination with a circle if the piece would be undefended there, without playing the move, then get feedback. If it would be defended, submit without marking.

Related checks

Undefended pieces lists who is currently loose. Abandoned defence is the other way a move leaves something hanging. Walking into an attack asks whether the landing square is attacked.

See all habits.