EndgamesPlay as White

Saavedra: Promote to a Rook

Win the Saavedra position of 1895: walk your king down the b-file out of the rook checks, then meet the stalemate trap by promoting the pawn to a rook instead of a queen.

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Introduction

This is the Saavedra position, a study by Georges Barbier and Fernando Saavedra from 1895. It has four pieces: your king and a pawn against a king and a rook. A rook is worth far more than a pawn, but this pawn is two steps from becoming a queen, and the black king stands in the far corner, too far away to help. The study has two parts. First your king has to get away from the rook's checks, and almost every square on the way is a mistake. Then, when the pawn is ready to queen, Black sets a last trap: a rook sacrifice that leaves the black king with no legal move — stalemate, a draw. The answer to the trap made this position famous. You promote the pawn, but not to a queen.

Lesson Content

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1. c7

Your king keeps the rook off the c-file, but only for this move. Use the move to bring the pawn within one step of queening.

c7 puts the pawn one step from queening, and the rook cannot stop it in the normal way. It cannot go to the c-file: c5 is guarded by your king. It cannot guard the queening square from d8: the pawn would take it there and become a queen. So Black has one defence left, to check your king again and again. It is the only winning move — every king move lets the rook reach the c-file, and the tablebase calls each of them a draw.

Passed PawnThreatTempo

Alternative Moves

♔︎b7 — ♔︎b7 gives the rook the move it needs: ♖︎c5 attacks the pawn from behind, the pawn cannot advance without being taken, and the tablebase calls it a draw.

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1. ..♖︎d6+

♖︎d6+ starts the checks. If Black plays anything quiet, the pawn becomes a queen, and queen against rook is a win for you. Black hopes to drive your king onto a bad square: one where the rook can attack the pawn from behind, or one where it can check from behind the moment the pawn queens.

DefenceActive Rook

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2. ♔︎b5

Several squares escape the check. Only one keeps the win and gives the rook no trick.

♔︎b5 is the only move that wins, and the alternatives show the rules for the whole walk. Stay off the c-file: there the rook drops to the first rank and threatens a check that wins the new queen. Do not go up: on the seventh rank the rook comes to d7, and the pawn can no longer queen without exposing your king. Do not go to the a-file: the rook gets behind the pawn and wins it. That leaves one direction — down the b-file, still close enough to keep the rook off c5.

King SafetyPassed PawnThreat

Alternative Moves

♔︎c5 — ♔︎c5 steps onto the file of your own pawn: ♖︎d1 threatens ♖︎c1+, a check that lines up your king and the new queen, so the rook takes the queen next move. The tablebase calls it a draw.

♔︎b7 — ♔︎b7 walks into a pin: ♖︎d7 attacks the pawn, and the pawn cannot queen because that would expose your king to the rook. The win is gone: the tablebase calls it a draw.

♔︎a5 — ♔︎a5 leaves the pawn alone: ♖︎c6 attacks it from behind, your king is too far away to guard it, and Black wins the pawn and then the game with the extra rook.

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2. ..♖︎d5+

♖︎d5+ keeps checking. The rook cannot stop for one move, or the pawn queens. It also has no time to step back and gain distance: any move that is not a check lets the pawn queen.

DefenceActive Rook

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3. ♔︎b4

Another rook check. Find the square that keeps the win and gives the rook no trick.

♔︎b4 follows the same rules: down the b-file, off the c-file. Your king is walking away from its own pawn, which looks wrong, but the pawn needs no guard — the rook cannot attack it without losing a move, and one free move is all the pawn needs to queen. The walk has a destination: the rook has to come down the d-file to keep checking, and on the third rank it will stand within reach of your king.

King SafetyTempo

Alternative Moves

♔︎c4 — ♔︎c4 steps onto the c-file: ♖︎d1 threatens ♖︎c1+, which wins the new queen with a check through your king. The tablebase calls it a draw.

♔︎b6 — ♔︎b6 goes back up: Black checks from d6 again and you are where you were after the first move. Still winning, but 2 moves slower.

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3. ..♖︎d4+

♖︎d4+ — the third check. The rook follows your king down the board, always from the d-file. A quiet move by the black king would hold out longer against a new queen, but it gives up the fight: the checks are the only chance Black has to stop the pawn.

DefenceActive Rook

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4. ♔︎b3

One more step down. Stay clear of the square where the rook could check you from behind.

♔︎b3 is one more step down the b-file. For the first time a second move is just as good: the tablebase rates ♔︎c3 as exactly equal. The rook is now so close that after ♖︎d1 your king steps to c2, attacks it and guards c1, so the check from behind never comes. Both moves win in the same number of moves.

King SafetyTempo

Alternative Moves

♔︎c5 — ♔︎c5 turns back up the board and onto the c-file: ♖︎d1 threatens ♖︎c1+, which wins the new queen with a check through your king. The tablebase calls it a draw.

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4. ..♖︎d3+

♖︎d3+ is the last check Black has. The rook now stands on the third rank, close to the bottom of the board — and close to your king, which is about to use that.

DefenceActive Rook

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5. ♔︎c2

The rook has come close. End the checks with a move that attacks it and keeps it off the first rank.

♔︎c2 breaks the rule about the c-file, and now it is right. Your king attacks the rook, so Black has to move it. The rook has no safe check either: on d2 or c3 your king takes it. And the trick from before is gone, because your king guards d1 and c1, so the rook cannot use the first rank. The checks are over, and the pawn threatens to queen. It is the only winning move.

TempoThreatPassed Pawn

Alternative Moves

♔︎c4 — ♔︎c4 attacks the rook too, but it leaves the first rank open: ♖︎d1 threatens ♖︎c1+, which wins the new queen with a check through your king. The tablebase calls it a draw.

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5. ..♖︎d4

♖︎d4 looks like a wasted move, and it is the point of Black's defence. Look at the black king: your king takes b1 and b2 from it, so its only free square is a2. Black is ready to answer a new queen with a rook check on c4. If the queen takes that rook, she also guards a2 — and a king that is not in check and has no legal move is stalemate, a draw. Other rook moves hold out longer against a new queen, but none of them sets a trap.

Stalemate TrickDefence

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6. c8=♖︎

A new queen would cover one square too many. Promote to the piece that leaves the black king its move.

c8=♖︎ is the move that made this study famous. A rook does not move diagonally, so if Black sacrifices on c4 now, your rook takes and the black king still has a2 — no stalemate, and you are a rook up. The new rook also makes a threat of its own: a check on a8 forces Black's rook to block on a4, and taking it there is checkmate. One rook each on the board, and Black is lost.

Stalemate TrickPassed PawnMating Net

Alternative Moves

c8=♕︎ — c8=♕︎ walks into the trap: ♖︎c4+ gives the rook away with check. If the queen takes it, Black has no legal move and it is stalemate; if your king steps aside, the rook takes the queen. The tablebase calls it a draw.

♔︎b3 — ♔︎b3 attacks nothing new: ♖︎d3+ checks again, your king has to return to c2, and the same decision is waiting for you. Still winning, but 13 moves slower.

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6. ..♖︎a4

♖︎a4 parries the threat: on the a-file the rook shields its king from the check on a8. Black has avoided the mate for one move. But look at the two black pieces — the king in the corner with a single free square, the rook unprotected on a4.

Defence

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7. ♔︎b3

The black rook is loose and the black king has one free square. Find the quiet move that attacks the rook and takes that square away.

♔︎b3 makes two threats with one quiet move. Your king attacks the rook on a4. It also takes a2 from the black king, so a rook check on c1 would be checkmate. Black cannot save the rook and stop the mate at the same time. It is the only winning move: after anything else the black rook gets away or your own rook is lost.

ThreatMating NetKing Safety

Alternative Moves

♔︎c3 — ♔︎c3 comes closer but attacks nothing: from c3 your king neither reaches the rook nor guards a2, so there is no mate threat. ♔︎b1 walks the black king out of the corner, and the tablebase calls it a draw.

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7. ..♔︎b1

♔︎b1 steps out of the corner and leaves the rook to its fate. Black had nothing better: the rook cannot be saved without allowing ♖︎c1#, and a check on b4 only gives it up at once.

Defence

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8. ♔︎xa4

Black dodged the mate. Take what it had to leave behind.

♔︎xa4 wins the rook, and the study is solved: king and rook against a bare king is a basic mate. Look back at the three ideas. Your king walked down the b-file because every other square lost the pawn or gave the rook a trick. It stepped to c2 only when that move attacked the rook and guarded the first rank. And the pawn became a rook, not a queen, because the stronger piece would have taken away the black king's last square.

Tablebase WinThreat

Alternative Moves

♖︎c1+ — ♖︎c1+ was the mate threat a move ago, but the black king now stands next to c1: ♔︎xc1 takes the unprotected rook, and the tablebase calls it a draw.

Key Takeaways

Against rook checks from the side, look for a king walk that ends with an attack on the rook: once the king attacks it, the checks stop
Stay off the file of your own pawn while the rook can reach the first rank — a check from behind wins the new queen
Before you promote, look at the enemy king: if it has only one free square, a queen may take that square away and give stalemate
Promoting to a rook is the answer when a queen would stalemate — the rook wins without taking the last square from the enemy king
A quiet move with two threats — win a piece or give mate — is as strong as a check

Now play it through

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

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Related Lessons

Lasker's Manoeuvre: The Stepladder

Rook vs Knight: The Separated Knight

Queen and Pawn vs Queen

Summary

You solved the Saavedra position step by step. The king walked down the b-file, the only route on which the rook checks win nothing. On c2 it attacked the rook and ended the checks. Then Black set a stalemate trap for the new queen, and you promoted to a rook: a rook does not guard a2, so the black king keeps its move. A quiet king move then attacked the rook and threatened mate at once.

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