TacticsPlay as White

The Exchange Sacrifice

Give a rook for a bishop or a knight — when you can name what the two points buy: material back, a queen, or the king.

Introduction

A rook counts 5, a bishop or a knight 3. Giving a rook for a minor piece — giving up the exchange — costs two points on the count. Strong players pay it when the minor piece does a job no other piece can take over: it guards the square your knight needs for a fork, it covers a queening square, or it is the king's last defender. Remove it, and the two points come back with interest. This lesson covers the forcing kind, where the return arrives in a few moves; the long-term, positional exchange sacrifice is a different judgement. Three payoffs here: a fork that wins the rook back at once, a passed pawn that queens, and a king that loses its last defender to a run of checks. Before every exchange sacrifice, name the payoff. If you cannot, keep the rook.

Lesson Content

Try this position

Black is a knight up; White has three pawns for it. The knight on f7 is the only black piece that covers e5 — and e5 is the square from which the knight on c4 would check a king on f7 and attack the rook on d3 at the same time. ♖︎xf7+ costs two points on the count: rook (5) for knight (3). But the recapture ♔︎xf7 does two things for White: the guard of e5 is gone, and the king now stands on a square the knight checks from e5. The sacrifice buys a fork, and the fork wins the rook back. Question for your own games: after the recapture, where does the king stand, and what does my knight reach from there?

SacrificeFork

Try this position

51. ♖︎xf7+

Black is a knight up. Pay two points to drag the black king onto a square where your knight can check it and hit the rook at the same time.

♖︎xf7+ — rook for knight, with check. ♔︎xf7 is the natural reply; if the king steps aside instead, White has won a knight and keeps the rook. On f7 the king stands a knight's move from e5, the one black piece that covered e5 is gone, and e5 also attacks the rook on d3. ♘︎e5+ next forks the king and the rook on d3, and the rook comes back.

SacrificeFork

Alternative Moves

♘︎e5 — ♘︎e5 attacks the rook on d3 and the knight on f7, but it is not check, so Black keeps the move. ♖︎d2+ saves the rook with check, and ♘︎d6 then covers f7. White gets at most knight for knight, and the game is level. The fork needed the king on the fork square — that is what the check on f7 was for.

Try this position

52. ♘︎e5+

The king has landed on f7. Collect more than you paid.

♘︎e5+ — check, and the knight attacks the rook on d3 as well. Black must move the king, and ♘︎xd3 follows. Count the whole sequence, not the first capture: White gave a rook (5) and took a knight and a rook (8). Knight against knight, and White is three pawns up — a won endgame. The two points were never lost; they were out for one move.

SacrificeFork

Alternative Moves

♔︎f2 — ♔︎f2 hands Black the move. ♔︎e6 walks the king out of the knight's reach, the rook on d3 is safe, and White has paid a rook for a knight with nothing coming back: Black is a rook up for three pawns and winning.

Try this position

A second payoff: a passed pawn. The pawn on e6 is two steps from queening, and one black piece stops it: the knight on d6 covers e8. No other black piece can get there in time — the rook on d2 cannot reach d8 past the knight on d4, and the king on h7 is two moves away. The rook on d8 attacks the knight; the pawn on c7 defends it. On the count, rook for knight loses two points. But the question is not what the knight is worth; it is what the knight prevents. Here it prevents a queen.

SacrificePassed Pawn

Try this position

36. ♖︎xd6

Your e-pawn wants to queen. Remove the one black piece that guards its queening square — even at the price of your rook.

♖︎xd6 — rook for knight, and the guard of e8 is gone. After cxd6 no black piece sees e8, and e7 next move threatens a queen Black cannot stop: ♖︎e2, to get behind the pawn, loses the rook to ♘︎xe2, and the knight on d4 blocks the road to d8. The order matters: remove the guard first, push second.

SacrificePassed Pawn

Alternative Moves

e7 — e7 pushes while the guard is still in place. The knight on d6 covers e8, so the pawn is stuck, and Black takes the knight on d4 with ♖︎xd4. White gets the knight back with ♖︎xd6, but the rook comes to e4 and the stranded pawn on e7 falls: the game is level. Same two points, wrong order — and the queen never comes.

Try this position

37. e7

Nothing guards the queening square any more. Make the threat Black cannot meet.

e7 — the threat is e8=♕︎, and Black cannot meet it. The rook cannot get behind the pawn: ♖︎e2 runs into ♘︎xe2, and the knight on d4 blocks the road to d8. Black's last try is h4+, hoping to drag the king onto the fourth rank so that ♖︎xd4 comes with check and the rook reaches e4 — step off it with ♔︎f3 (♔︎xh4? ♖︎xd4+ and ♖︎e4 catches the pawn), and after ♖︎xd4 e8=♕︎ makes a queen. Final count: White gave a rook and a knight, took a knight and made a queen — queen against rook, and White is winning.

SacrificePassed Pawn

Alternative Moves

♔︎f3 — ♔︎f3 spends the one move that mattered. ♔︎g8 brings the king back towards the pawn; from f7 it holds the queening square, and the pawn is stopped. Black keeps the rook against a knight and is winning.

Try this position

A third payoff: the king. Black is a knight up for two pawns, but look where Black's pieces are: the queen on b7 and the rook on e1 are far from the king on g8, and the only piece next to it is the knight on f8. Now look at the white rook on f6. It stands on the long diagonal from d4 to h8, in the way of its own queen. ♖︎xf8+ does two jobs with one move: it removes the king's last defender, and it clears f6 so the queen reaches g7 and h8. Ask of every sacrifice: does the capturing piece also unblock something of mine?

SacrificeKing Attack

Try this position

39. ♖︎xf8+

One black piece shields the king. Remove it and open a line for your queen with the same move.

♖︎xf8+ — rook for knight, with check, and the diagonal behind it opens. Black has two legal moves. ♔︎h7 runs into ♕︎h8 mate at once, the queen protected by the rook on f8. So ♔︎xf8, and the queen comes in with checks: ♕︎h8+, then a check along the seventh rank — ♕︎h7+ if the king went to f7, ♕︎g7+ if it went to e7. The king has to leave the rank, and ♕︎xb7 wins the queen: a skewer along the seventh rank. White gave the exchange and won a queen. Until the material came back, every white move was a check.

SacrificeKing Attack

Alternative Moves

♖︎xg6+ — ♖︎xg6+ gives the rook for a pawn. ♘︎xg6 takes it, and from g6 the knight covers h8 and f8, the squares the queen needed, and Black is a rook and a knight up for three pawns — winning.

Try this position

White's pawns on b6 and c5 are far advanced, and the bishop on d6 already covers b8. One black piece holds everything together: the bishop on e4 covers c6 and defends b7. Which move wins?

SacrificePassed Pawn

Try this position

White plays ♖︎xb5, and Black takes back with axb5: a rook for a bishop. What does White get for the two points?

SacrificePassed Pawn

Key Takeaways

A rook for a minor piece costs two points. Pay them only for a payoff you can name.
Ask what the minor piece prevents, not what it is worth: a fork, a queening square, a line to the king.
Material back: the recapture can drag the king onto a square your knight checks — with the rook on the same fork.
Passed pawn: remove the guard of the queening square first, push second — the order decides.
King: take the last defender with check, then keep checking until the material comes back.

Now play it through

Step through every move on a real board, try the wrong ones, and ask Knighty why they fail.

Practice Interactively

Related Lessons

Mate in Four

The Attack on f7

Sacrifice and King Attack

Summary

An exchange sacrifice gives a rook (5) for a bishop or a knight (3). It pays when the minor piece was doing a job no other piece could take over, and the return is concrete: a fork that wins the rook back at once, a passed pawn that queens once its guard is gone, a king that loses its last defender to a run of checks. Count the whole line, not the first capture. If you cannot name what comes back, keep the rook.

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