ChessRanger
Tactics

Flight square

A square the king can escape to — or a hole you must give it before it's needed.

When you calculate a mating attack, the first question is: does the king have a flight square? A single escape route can be the difference between mate and nothing. Attackers work to take flight squares away; defenders work to make one.

It's also why …h6 or …g6 (making 'luft') matters — you give your king a flight square before a back-rank mate can happen.

Why it matters

Counting the king's flight squares is the core of both attacking calculation and back-rank safety — it decides whether a check is mate.

The mistake everyone makes

Announcing 'mate' without checking the one escape square, or leaving your own king with no luft against a back-rank threat.

Related terms

Check
An attack on the king that must be answered immediately.
Luft
An escape square made for the king, usually by advancing a pawn in front of it.
Combination
A forcing sequence of moves — usually with a sacrifice — that wins by force.

See Flight square in your own games

Play the engine, train tactics, and analyse your games — ChessRanger points out these patterns as they come up so the word turns into a skill. Free to start.

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