A king and a single pawn against a bare king looks simple and still produces draws from winning positions. Three ideas cover most of them: the rule of the square, the opposition, and the special case of a rook pawn. Learn those before you memorize long endgame books.

The rule of the square

If the pawn is running alone, imagine a square whose side is the pawn's path to the promotion square. A pawn on e4 has four steps to e8, so the square reaches from the e-file across to the a-file. If the defending king can step into that square, it catches the pawn. If it cannot, the pawn queens even without help from its own king.

Count the square from the pawn's next square when it is your move and the pawn is free to advance. Players miss this when they "just check" the distance by files and forget the king moves diagonally.

💡 Chess Hint: Before you abandon a passed pawn to its fate, draw the square. If the enemy king is outside it, you do not need a second piece.

The opposition

When two kings face each other with one square between them, the player who is not to move has the opposition. Kings on e4 and e6 are a direct opposition. Whoever has to move must step aside and let the other king advance.

That matters because a pawn on the e-file promotes only if its king can shoulder the enemy king out of the way. Put the White king on e5, the pawn still back on e4, and the Black king on e7. If Black is to move, Black must give ground and White's king reaches the sixth rank. If White is to move, pushing the pawn at once often throws the opposition away. Improve the king first. A king standing on the sixth rank in front of its own pawn, with the enemy king held off, is the usual winning picture for a central or bishop pawn.

Do not push too soon

The pawn's job in these endings is to take away squares, not to sprint. Every pawn advance is a move you cannot take back, and it can hand the enemy king a new route around. Keep the pawn on the fourth or fifth rank while the kings fight for the critical squares in front of it. Advance only when the advance gains a tempo or forces the enemy king to let yours in.

An outside passed pawn, far from the remaining pawn mass, wins in a different way. It drags the enemy king across the board. Your king then eats the pawns on the other wing. You do not have to promote the outside pawn. You have to make the opponent's king go and fetch it.

The rook pawn draws

A pawn on the a-file or h-file is the exception. The defending king only needs to reach the promotion corner. With a White pawn on a7 and a White king on b6, a Black king on a8 is stalemated if it is Black to move: a7 is occupied by the pawn and defended by the king, and b7 and b8 are covered by the king on b6. White cannot win unless the king can reach c7 or b7 without allowing that stalemate.

So if you are the defender against a rook pawn, run to the corner. If you are the attacker, do not push the pawn to the seventh rank until your king controls the square beside the promotion square.

Frequently Asked Questions

Does the opposition always win a pawn ending?

No. Opposition is a tool for taking key squares. A rook pawn, or a pawn that is too far back while the enemy king is in front of it, can still be a draw.

Should I promote as fast as possible?

Only when the enemy king is outside the square, or when your king already controls the promotion path. Otherwise improve the king.

What if there are pawns on both wings?

Create a passed pawn on one wing, use it to pull the enemy king away, and invade with your king on the other. That plan is covered in how to push a passed pawn.

Calculate the kings, then the pawn

Mark the square, decide who has the opposition, and treat a rook pawn as a different problem. Practice the same shapes in puzzles, and drop a simplified position onto the board when you want a second look from chess hints.

Analyze a position Train with puzzles

Try the line on the board with chess hints.