Pawns 5
Practical Pawn Endings

The king is a pawn piece

In pawn endings the king must lead. Centralise it when safe, escort a passed pawn and attack the opponent’s pawns from behind. A king that arrives one move earlier can decide the result, so count routes rather than guessing.

Opposition and key squares

When kings face each other with one square between, the player not to move often has the opposition. That can force the other king aside, but pawn placement and reserve tempi decide whether the position is won. Mark the key squares in front of your pawn and calculate the enemy king’s route.

Count every pawn race

Count moves to promotion, whose turn it is, captures and whether promotion gives check. A farther pawn can win if it promotes with tempo. A closer pawn can lose if the enemy king reaches its promotion square or the pawn has no shelter. Calculate the whole race before pushing.

The square of the pawn

For an unassisted pawn race, the square rule is a quick counting aid. A white pawn on e5 needs three advances to reach e8. Imagine a square extending from e5 to e8 and three files towards the defending king. If the king can enter that square on its turn, it can usually catch the pawn in an unobstructed race.

Always account for whose move it is. With just White’s king on a1 and pawn on e5 against Black’s king on b5, White to move can play e6. The king is then too far away: after Kc5 e7 Kd6 e8=Q, White promotes safely. With Black to move instead, Kc5 enters the square; e6 Kd6 e7 Kxe7 catches the pawn. Both examples assume the exact empty-board position described.

The shortcut needs adjustment for an initial two-square advance, blocked routes, checks and king support. If a second pawn controls a king’s route, count the actual legal moves. Use the rule to identify the race, then calculate when the result matters.

What opposition actually buys

Direct opposition places the kings on the same rank or file with one square between them. The player not to move has the opposition in that arrangement. The moving king may have to step aside, allowing the other to advance. However, a legal pawn move may preserve the king’s position, and an unrelated passed pawn may make the whole manoeuvre irrelevant.

Consider only White’s king on e4 and pawn on e3 against Black’s king on e6, with Black to move. After Kd6, White can consider Kf5, going around on the other side and taking more advanced squares. This demonstrates access, not a complete forced-win proof. After each reply, continue comparing the kings and the pawn’s promotion route.

A reserve tempo is a pawn move you can safely save for later. Spending it without a reason can change who must move in a king standoff. Before using one, check whether it weakens a pawn, allows a breakthrough or leaves the king too far away. A spare move is valuable only if its consequences are acceptable.

The rook-pawn exception and stalemate

Rook pawns live on the a- and h-files. There is no space beyond the edge for the attacking king to outflank a defender in the promotion corner. This makes them an important exception to simple rules about king support.

With only White’s king on b6 and pawn on a6 against Black’s king on a8, White cannot force the defender away from the corner. White’s a7 immediately produces stalemate: the black king is not in check, a7 and b7 are controlled by White’s king, and b8 is controlled by the pawn. Rehearse this position to see why an extra pawn can be drawn.

Before exchanging the last pair of rooks or minor pieces, stop and evaluate the resulting pawn ending independently. Count both king routes, check rook-pawn exceptions and look for an outside passer. A material advantage in the current position does not guarantee a won pawn ending.

Try it, then check your reasoning

In the example with White Ka1 and pawn e5 against Black Kb5, why does changing the side to move change the race?

In your next game, pause at one similar decision and explain your choice before playing it.