Abandoned defence

Abandoned defence is a move that stops protecting a unit which was defended before. The piece may still sit on the same square; it is the defender that walked away. That is how “safe” pieces become hanging.

The signal

Look at the move just played (yours or the opponent’s). Did it leave a piece without a defender? Mark that abandoned unit. The scan is about the *change* in protection, not a static list of hanging pieces (that is undefended pieces).

Why it is easy to miss in a game

You moved a rook to an open file or a knight to a better outpost. The piece you used to defend is still on the board, so it does not “look” new. The opponent’s capture comes as a surprise one move later. Puzzles rarely ask “what did your last move stop defending?”

What WayChess trains

You mark pieces left undefended by a specific move and get immediate feedback. Together with walking into an attack, this is how WayChess trains the moment a tactic is created, not only the position after it exists.

See all habits.