The Opposition
The staring contest that decides pawn endgames
Put the two kings on the same line with one square between them: the player who does not have to move “has the opposition,” and the other king must give way. This staring contest is the fundamental weapon of king-and-pawn endgames.
Play this ending (free)What the opposition actually does
Kings cannot touch, so when they stand face to face with one square between, the one that must move must retreat or sidestep, surrendering squares. Having the opposition means the other player faces that choice. It is zugzwang in its purest, most reusable form.
In the diagram, 1.Ke6! puts the kings eye to eye with Black to move. After 1...Kd8 2.Kf7 (outflanking!) the white king seizes the promotion path; 1...Kf8 2.Kd7 mirrors it. The pawn strolls home behind the king. Note what the pawn did during the fight: nothing. The kings decided everything; the pawn only cashes the result.
Distant and diagonal opposition
The face-off generalizes. Distant opposition: kings on the same line with three or five squares between; the player not to move again holds the advantage, because as the kings step toward each other the distant opposition converts into the direct kind. The parity rule: same line, odd number of squares between, opponent to move = you have it.
Diagonal opposition works the same way corner-to-corner and matters in outflanking duels. And the master rule that unifies them (corresponding squares): every square the defender's king can stand on has a “correct answer” square for yours; opposition is just the simplest correspondence, and the one that covers 95% of practical positions.
Using it, and breaking it
Attacking recipe for king-and-pawn-vs-king: keep your king in front of the pawn (never beside or behind), grab the opposition when offered, and answer sidesteps with the outflank: step diagonally forward on the opposite side. The pawn moves last.
And when the opposition battle deadlocks (the defender mirrors you perfectly), remember that opposition is about parity of tempi. A spare pawn move, or a king triangulation, flips the parity: same position, other side to move, fight won. That trick has its own guide.
Questions
What is the opposition in chess?
A confrontation where the kings stand on the same rank, file or diagonal with one square between them (direct opposition). The player who does not have to move 'has the opposition': the opponent's king must give ground.
What is distant opposition?
Kings on the same line with an odd number of squares (3 or 5) between them. The player not to move holds it, and by advancing in step it converts into direct opposition at the critical moment.
Does having the opposition always win?
No: it is a tool, not a verdict. In king-and-pawn-vs-king it typically decides the game (attacker with opposition wins, defender with opposition draws, rook pawns excepted), but in complex positions it must be combined with key squares and outflanking.
Don't just read it, play it
Every position below is playable right now, free, no signup, against a tablebase-perfect opponent that never gives up and explains every mistake.
Opposition: King Before Pawn
White to play and win
Defending King & Pawn vs King
Black to play and draw
Follow the full curriculum (free)or sharpen these endings in the Gym