Absolute bishop pin
The bishop attacks the knight. The knight is frozen: moving it would uncover an attack on the king, which is illegal. This is an absolute pin.
Original teaching diagram
By the end of the lesson, students should be able to recognize a pin, tell the difference between an absolute pin and a relative pin, exploit a pinned piece, and name at least one way to break a pin.
A pin happens when a bishop, rook, or queen attacks an enemy piece and that piece has something more important behind it on the same line.
Final safety check: Is the pin real? Can the opponent capture the pinning piece, block the line, or move the valuable piece away?
The bishop attacks the knight. The knight is frozen: moving it would uncover an attack on the king, which is illegal. This is an absolute pin.
Original teaching diagram
The knight may legally move, but then the bishop would attack the queen. That makes this a relative pin.
Original teaching diagram
Rooks can pin too. The bishop sits on the e-file between the rook and the king, so the bishop cannot leave the file.
Original teaching diagram
A queen can pin along a file. The knight can move, but doing so would expose the black queen behind it.
Original teaching diagram
The bishop lines up the knight with the queen. The knight is not absolutely frozen, but moving it carelessly loses the queen.
Redrawn/adapted from FIDE curriculum, Lesson Twenty
Here the knight cannot move because the king is behind it on the same diagonal. This is the classic absolute pin pattern.
Redrawn/adapted from FIDE curriculum, Lesson Twenty
Once a piece is pinned, look for a second attacker. Here the queen also attacks c6, so the pinned knight is much harder to defend.
Original teaching diagram
The f7-pawn is pinned to the king. That matters because it cannot leave f7 to recapture a piece on g6 without exposing the king.
Original teaching diagram
Pins are not permanent. White can place the bishop from c1 on d2, blocking the diagonal behind the knight and freeing the knight to move later.
Original teaching diagram; defensive idea consistent with FIDE curriculum
Pins can run sideways. The rook attacks the bishop, and the queen is the valuable piece behind it.
Original teaching diagram
Difficulty progresses from obvious one-move recognition to exploiting a pinned defender and a full-board source position. Hints and answers can be opened locally.
Find a bishop move that creates an absolute pin.
Look for a diagonal where the knight would stand between your bishop and the king.
Correct move: 1. Bb5!
The bishop on b5 attacks the knight on c6, and the king on e8 is behind it. The knight cannot legally move away.
Original teaching diagram
Put the rook on the right file to make a pin.
Which file contains both the black bishop and the black king?
Correct move: 1. Re1!
The rook attacks the bishop on e6. The bishop is now stuck in front of the king on e8.
Original teaching diagram
Create a relative pin to the black queen.
Your bishop needs a square that attacks the knight first and the queen behind it.
Correct move: 1. Bb5!
From b5 the bishop attacks c6. If the knight moves, the queen on d7 is exposed.
Original teaching diagram
Win the pinned piece.
The knight cannot run away. Which white pawn can take it now?
Correct move: 1. dxc6
The pawn captures the knight on c6. The bishop on b5 had pinned that knight to the king, so the knight could not escape beforehand.
Original teaching diagram
Win the piece that is pinned to the queen.
The knight is standing between your bishop and the black queen. Which pawn attacks the knight?
Correct move: 1. exf6
The e5-pawn captures the knight on f6. The bishop on g5 had made the knight a relative pinned piece in front of the queen on d8.
Original teaching diagram
Can White take the queen safely?
Check whether the f7-pawn is really allowed to move away from the bishop–king diagonal.
Correct move: 1. Nxg6!
Continuation: The f7-pawn cannot recapture on g6.
The bishop on c4 pins the f7-pawn to the king on g8. If the pawn moved to g6, the bishop would give check along c4–d5–e6–f7–g8, so that recapture is illegal.
Original teaching diagram
Win the pinned bishop.
The bishop sits in the middle of a rook–queen line. Which pawn can capture it?
Correct move: 1. cxd4
The c3-pawn takes the bishop. The bishop could have moved earlier, but doing so would have exposed the queen on h4 to the rook on a4.
Original teaching diagram
Use a second attacker to collect the pinned knight.
The knight cannot move away from the b5–e8 diagonal. Which rook can reach c6?
Correct move: 1. Rxc6
The rook captures the knight on c6. The bishop on b5 is the pinning piece, so the knight cannot escape by moving.
Original teaching diagram
Break the pin without moving the knight.
Move the king off the diagonal in one legal king-and-rook move.
Correct move: 1. O-O!
Castling moves the king from e1 to g1. Once the king leaves the b4–e1 diagonal, the knight on c3 is no longer absolutely pinned.
Original teaching diagram
Find the bishop move that pins White’s queen to the king.
Look at the diagonal b4–c3–d2–e1. Can a black bishop enter that line?
Correct move: 1... Bb4!
Continuation: Source continuation: 2. O-O Bxc3, and Black takes the queen.
The bishop moves from e7 to b4 and attacks the white queen on c3. The white king on e1 is behind the queen, so the queen cannot leave the b4–e1 pin line while the king remains on e1. In the source continuation, White castles and Black then captures the queen.
Exercise derived from ChessGo Easiest sample PDF, position 3
| Time | Phase | What to do |
|---|---|---|
| 0–6 min | Review | Bishop/rook/queen move on lines; quick piece-value check. |
| 6–18 min | Teach the idea | Definition, absolute vs relative pin, recognition routine; Examples 1–4. |
| 18–30 min | Build pattern library | Examples 5–10. Students identify attacker, pinned piece and target aloud. |
| 30–37 min | Guided recognition | Coach shows 3–4 boards again with labels hidden; students use LINE → MIDDLE → BEHIND → USE IT. |
| 37–52 min | Exercises | Puzzles 1–7 first; move to 8–10 if ready. Require a spoken reason before moving a piece. |
| 52–58 min | Pin hunt mini-game | Play from a normal start or a coach-set position. Pause when a genuine pin appears; identify whether it is absolute or relative. |
| 58–60 min | Exit check | Ask the four review questions; note one student misconception for next week. |