The windmill is chess’s version of a wood-chipper: pieces go in, nothing comes out. A windmill is a seesaw of discovered checks where your rook swings out to grab a piece, swings back to check, and repeats — while the enemy king can only shuffle helplessly between two squares. Windmill puzzles train you to recognize and run that machine. The set below is live and drawn from real games; solve a few and you’ll start dreaming of that perfect seesaw.
How to use this page
- Look for a bishop (or queen) aimed at a cornered king, with your rook on its line.
- Every move in the sequence must be a check — that’s what keeps the opponent frozen.
- Missed it? Find the piece whose swing uncovers the check, and where it lands.
Your move — solve the position
Real positions from real games. Solve one, and the next appears.
Take that instinct to a live board — 3D chess with character skins & rewards.
What is a windmill, exactly?
A windmill is a chain of discovered checks powered by two pieces. A bishop (or queen) sits on a long diagonal aimed at the enemy king in the corner, and your rook sits on that diagonal, blocking it. When the rook swings off the line to capture a piece, it unmasks the bishop’s check — a discovered check. The king is forced to move. Then the rook swings back, delivering a direct check of its own, and the king is forced back. Now you can swing out again and grab another piece. Every single move is a check, so the defender never gets a turn to respond. A windmill routinely nets three, four, or more pieces in one unbroken sequence and often decides the game on the spot. Our full guide to the windmill shows the classic Torre–Lasker example move by move.
How to spot a windmill (the cues that matter)
- Find the trapped king. The engine needs a king jammed in a corner (or on an edge) with just one or two escape squares, so it’s forced to shuttle back and forth.
- Spot the anchor piece. Look for your bishop or queen aimed straight at that king down a long diagonal — the piece that delivers the discovered check.
- Place the rook on the anchor’s line. Your rook needs to sit on the diagonal so it can swing off to reveal check and back to deliver one.
- Check for targets on the swing rank. Enemy pieces lined up on the rook’s rank (often the 7th for White) are the harvest. No targets, no windmill.
- Confirm every move is a check. Trace the whole seesaw. If even one swing doesn’t check, the spell breaks and the opponent escapes.
Common mistakes to dodge
- Breaking the chain of checks. The windmill only works because the defender never gets a free move. A single non-checking swing lets them capture your rook or run.
- Swinging out to nothing. Make sure there are real targets on the rook’s path. Grabbing empty squares just risks a draw by repetition.
- Letting the king escape the shuffle. If the king has a third safe square, it can break out of the seesaw. Verify it’s truly trapped before you start.
- Forgetting the finish. Don’t get so busy munching pieces that you miss the mate or the decisive gain. Know where the combination ends before you begin.
Keep training
- Learn the theory and the famous game: how the windmill works.
- Master the engine that drives it: discovered attack puzzles.
- Sharpen the long-range vision it needs: x-ray puzzles.
- Practice setting one up: sacrifice puzzles (windmills often start with a sac).
- Back to the full puzzle library.
Windmill puzzle FAQ
Why is the windmill so devastating? Because every move is a check, the defender never gets a turn to respond. They can only shuffle the king while you harvest piece after piece.
What do I need to build one? A trapped king (usually in a corner), a bishop or queen aimed at it down a diagonal, and a rook on that diagonal with targets to grab on its swing rank.
Is the windmill rare? In practice, yes — the setup is specific. But learning the pattern means you’ll recognize the potential and steer toward it when the pieces line up.
Where do these puzzles come from? Real games in the Lichess open puzzle database (CC0), each engine-verified at the source.
Curated and written by the Chess Lab Academy Editorial Team (AI-assisted, human-edited) · Puzzles from the Lichess open database (CC0) · Last verified 2026-07-13 · How we verify content.