The Zwischenzug: The In-Between Move That Changes Everything
A zwischenzug (German for "in-between move") is a forcing move played instead of the obvious reply, usually before a recapture, that improves the position before the expected move is made.
How a zwischenzug works
Most exchanges follow a script: you take, I take back. A zwischenzug breaks the script. Instead of recapturing right away, you insert a move the opponent must answer first, most often a check, a capture, or a threat against a bigger piece. Then, once that has been dealt with, you make the recapture you were always going to make.
The in-between move only works if your recapture is still available afterwards. That is the key test: the piece you want to take back must still be hanging, and it must not be able to escape with tempo while answering your intermediate move. If both are true, the extra move is free, and free moves win material.
Where in-between moves hide
The classic setting is a sequence where both sides have pieces attacked at the same time. If you recapture first, the opponent takes your attacked piece and the trade is even. If you capture their attacker with check first, you collect both.
Other common forms: a check that drives the king to a worse square before you recapture, a counter-attack on the queen that forces it to move, or a pawn advance that attacks a piece and opens a line before the trade is completed.
Why players miss it
Recaptures feel automatic. When a piece is taken, the hand reaches for the recapture before the eyes have scanned the board. That habit costs games on both sides: you miss your own in-between moves, and you walk into your opponent's because you assumed they would take back.
The cure is a one-second pause before every recapture. Ask: "Do I have a check or capture that the opponent must answer first, after which my recapture is still there?" And before you start an exchange, ask the same question from your opponent's side. The in-between moves you overlook in your own games are exactly the ones worth drilling.
How to spot it
- Pause before every recapture and list your checks first.
- Look for positions where both sides have a piece attacked at once.
- Check that your recapture will still be available after the in-between move.
- Prefer intermediate moves that come with check, so the reply is forced.
- Before starting a trade, ask what in-between move your opponent has.
Try one
Work it out from the diagram first, then play it on the board or open the solution.
2
7
d
cExample 1
Black to move and win a piece.
Show solution
14...Bxe3+ 15.Kh1 fxe6
White's knight has just landed on e6, attacked by the f7 pawn, but White's bishop on e3 is also attacking Black's bishop on b6. If Black plays fxe6 at once, Bxb6 takes the bishop back and material is level. Instead Bxe3+ captures first with check; after Kh1 (or Rf2) the knight on e6 is still there, and fxe6 leaves Black a full piece up.
Position from a real game, via the Lichess puzzle database.