Vertical fork

A vertical fork is two enemy pieces on the same file such that a rook (or queen) can attack both from one square on that file. The signal is the pair plus a fork square, not “any two pieces on a file.”

The signal

Look down each file. If two opponent pieces share it, ask whether there is a square from which a rook would hit both, and whether that square is usable. Mark the pairs that qualify. You also train the opponent’s vertical forks against you.

Why it is easy to miss in a game

Files open after pawn trades. The two targets were not aligned a move ago. You are looking at diagonals because the last puzzle you did was a bishop mate. Double attacks on a file feel “too simple” until a rook lands on the fork square.

What WayChess trains

You mark valid vertical-fork pairs with the same visual language as other fork habits, then get feedback. Related: knight fork and bishop diagonal.

See all habits.