The Opposition in Pawn Endgames
What Is the Opposition?
Definition
The opposition occurs when two kings face each other and the player who must move is forced to give way.
In the most common form, the kings stand on the same rank or file with exactly one square between them.
Main Purpose
Opposition helps a king:
- Enter important squares
- Block the opposing king
- Support a passed pawn
- Defend against promotion
Main Question
Which king must move first?
The player who does not have to move is usually said to have the opposition.
Quick Opposition Guide
Use these three diagrams to see the main idea.
Make the Defender Move
Black to move
The kings face each other with one square between them.
White has the opposition because Black must move away.
Step Around the King
2.Kf6!
After Black moves left, White steps around on the other side.
The White king reaches a key square.
Defend by Holding the Line
White to move
Now White must move first.
Black can mirror the White king and keep it away.
Opposition is a way to control entry squares. It is not the final goal by itself.
Important Terms
Direct Opposition
Direct opposition occurs when the kings are on the same rank or file with exactly one square between them.
Distant Opposition
Distant opposition occurs when the kings are on the same rank or file with three, five, or another odd number of squares between them.
Diagonal Opposition
Diagonal opposition occurs when the kings face each other diagonally with one square between them.
Outflanking
Outflanking means stepping around the enemy king after it moves aside.
The attacking king uses the open side to make progress.
Zugzwang
Zugzwang is a position in which having to move causes a disadvantage.
Direct opposition often creates a simple king zugzwang.
Direct Opposition
Black to move
The White king is on e5.
The Black king is on e7.
The square e6 lies between them.
Because Black must move, White has the direct opposition.
Black cannot move toward e6 because the White king controls that square.
Why the Defender Must Give Way
The kings cannot move next to each other.
Black must leave the e-file.
For example:
1...Kd7
2.Kf6!
Black moved to the left.
White moves around the king on the right:
2.Kf6!
The White king reaches f6, one of the key squares for the pawn on e4.
When the defending king moves to one side, the attacking king usually enters on the other side.
Opposition Leads to a Key Square
The pawn on e4 has the key squares d6, e6, and f6.
White has reached f6
Once the king reaches a key square, it can support the pawn’s advance.
A legal continuation is:
2...Kc6 3.e5 Kc7 4.Kf7
White keeps the king in front of the pawn and will promote.
Opposition is useful because it helps the king reach a square that wins the pawn ending.
The Other Side Is Symmetrical
Black may move to the right instead:
1...Kf7
2.Kd6!
White steps around on the left:
2.Kd6!
The same rule applies:
- Black moves left → White enters on the right
- Black moves right → White enters on the left
What Changes When White Must Move?
Use the same position, but now White is to move.
White to move
White must leave the direct opposition first.
If White moves left, Black can also move left.
If White moves right, Black can also move right.
Black keeps the king in front of the pawn.
The Defender Mirrors the King
A drawing continuation is:
1.Kd5 Kd7 2.Kc5 Kc7
White cannot make progress
Black mirrors the White king.
If White returns with:
3.Kd5
Black answers:
3...Kd7
The same opposition returns, and White still has to move.
On defense, keep your king in front of the pawn and take the opposition when possible.
The Same Position Can Win or Draw
Black to Move
White wins
Black must give way.
White outflanks the king and reaches a key square.
White to Move
Black draws
White must give way.
Black mirrors the king and blocks the important squares.
In opposition positions, a single tempo can change the result from a win to a draw.
Horizontal Opposition
Opposition can also occur along a rank.
Black to move
The White king is on c5.
The Black king is on e5.
The square d5 lies between them.
Because Black must move, White has the horizontal opposition.
The geometry is the same as vertical opposition.
The king that must move gives up access on one side.
Distant Opposition
The kings do not need to be close together.
Black to move
The kings stand on e2 and e8.
There are five squares between them:
e3, e4, e5, e6, and e7.
Five is an odd number, so the kings have distant opposition.
Because Black must move, White has it.
Convert Distant Opposition into Direct Opposition
If the kings approach on the same file:
1...Ke7 2.Ke3 Ke6 3.Ke4
Black to move
The kings now stand on e4 and e6.
Only e5 lies between them.
The distant opposition has become direct opposition.
Black must move away first.
Distant opposition helps you plan which king will gain the direct opposition later.
The Odd-Square Rule
When the kings are on the same rank or file:
- One square between them → direct opposition
- Three or five squares between them → distant opposition
- The number of squares between the kings is odd
The player who does not have to move has the opposition.
An Even Number Is Different
White to move
The kings stand on e2 and e7.
There are four squares between them.
Four is even, so this is not yet distant opposition.
The players must calculate how the kings will approach.
Do not use the word “opposition” only because two kings stand on the same line. Count the squares between them.
Diagonal Opposition
The kings may also face each other diagonally.
Black to move
The White king is on c3.
The Black king is on e5.
The square d4 lies between them on a diagonal.
Because Black must move, White has the diagonal opposition.
Convert Diagonal Opposition
For example:
1...Kd5 2.Kd3
Black to move
The kings now stand on d3 and d5.
White has converted diagonal opposition into direct opposition.
Black must move again.
Diagonal opposition is often a bridge that helps a king reach direct opposition or outflank the opponent.
Outflanking
Opposition forces the enemy king to step aside.
Outflanking is the move that takes advantage of that step.
2.Kf6!
Black has moved to the left.
White does not follow the Black king.
White steps to the other side with Kf6!
This is outflanking.
White gains ground while keeping the Black king away from the pawn’s key squares.
Do Not Follow the Defender Blindly
When the defender moves left, moving left as well may waste time.
When the defender moves right, moving right as well may also waste time.
The usual attacking pattern is:
- Take the opposition.
- Force the defending king aside.
- Enter on the opposite side.
- Reach a key square.
- Advance the pawn safely.
Opposition and Key Squares Work Together
Black to move
The opposition forces Black to leave the e-file.
The key squares show where White wants to go.
Without knowing the key squares, White may take the opposition but still choose the wrong route.
Without the opposition, Black may keep White away from all three key squares.
Use opposition to reach a useful square, not merely to make the kings face each other.
The Sixth-Rank Rule for a Non-Rook Pawn
For a normal pawn, a king on the sixth rank in front of its pawn is extremely powerful.
White to move
The White king is on e6.
The pawn is on e5.
The king is in front of the pawn on the sixth rank.
White wins even though White must move.
The king can move to d6 or f6 and preserve access to the seventh rank.
The Position Also Wins with Black to Move
Black to move
If Black moves to d8, White can move to f7.
If Black moves to f8, White can move to d7.
The White king controls the promotion route and supports the pawn.
Opposition matters, but the location of the king and pawn may matter even more.
Opposition on Defense
The defending king should usually stay:
- In front of the pawn
- Near the promotion square
- Ready to take the opposition
White to move
Black guards the route to the key squares.
When White chooses a side, Black mirrors the move.
This prevents the attacking king from stepping forward.
A Wrong King Move Can Give Up the Opposition
White to move
White can still win, but the king move must be chosen carefully.
Moves such as Kd4! or Kf4! keep useful opposition ideas.
The passive move 1.Ke3? gives Black an easy direct opposition.
Black Takes the Opposition
After:
1.Ke3? Ke5
White to move
The kings stand on e3 and e5.
White must move again.
Black has the direct opposition and keeps the White king from advancing.
The position is drawn with correct defense.
In pawn endings, a quiet king move can lose a critical tempo.
Opposition Is Not Always the Best Move
Sometimes a player becomes so focused on opposition that they miss a direct win.
White to move
White could create direct opposition with 1.Kc3?
However, that move ignores the pawn.
The correct move is:
1.b7!
The pawn is ready to promote.
Chasing Opposition Loses the Pawn
After:
1.Kc3? Kxb6
Black captures the pawn
White took the direct opposition but lost the only pawn.
The opposition had no useful purpose.
White should have played 1.b7!, followed by b8=Q.
Always ask what the opposition helps you achieve.
The Rook-Pawn Exception
Opposition does not automatically win every king-and-pawn ending.
Rook pawns are special.
White to move
White has a king and an a-pawn.
The Black king has reached the corner a8.
White cannot force the king away because there is no space beyond the edge of the board.
The position is drawn.
Pushing the Pawn Causes Stalemate
If White plays:
1.a7
Stalemate
The Black king is not in check.
Black has no legal move:
- Kb8 is controlled by the pawn on a7
- Kb7 is controlled by the White king
- Kxa7 is illegal because the White king protects the pawn
The game is drawn by stalemate.
Before using opposition rules, check whether the pawn is a rook pawn and whether the defending king can reach the corner.
When Should You Look for Opposition?
Look for Opposition When
- Only kings and pawns remain.
- One king must enter important squares.
- The defender is blocking a passed pawn.
- A single tempo decides who gives way.
- The kings are approaching each other.
Look Beyond Opposition When
- A pawn can promote immediately.
- A pawn can be captured.
- A rook pawn is near the corner.
- A pawn race is faster than a king maneuver.
- A key square can be reached directly.
Practice: Use the Opposition
Practice 1: Who Has the Opposition?
Black to move
- Which side has the direct opposition?
- Why can Black not move toward e6?
- What should White do after 1...Kd7?
- Which key square can White reach?
- Is the position winning or drawn?
Practice 2: Change the Side to Move
White to move
- Which side has the opposition?
- What can Black do after 1.Kd5?
- How should Black respond when White changes sides?
- Can White reach a key square?
- Is the position winning or drawn?
Practice 3: Distant Opposition
Black to move
- How many squares lie between the kings?
- Is that number odd or even?
- Which side has the distant opposition?
- How can White preserve it while the kings approach?
- What type of opposition appears later?
Practice 4: Opposition or Promotion?
White to move
- Can White take direct opposition?
- Why is that not the best plan?
- What happens after 1.Kc3?
- What is the winning move?
- What should White always check before seeking opposition?
Practice 5: The Rook-Pawn Corner
White to move
- Which type of pawn does White have?
- Where is the Black king?
- Can White force the king out of the corner?
- What happens after 1.a7?
- What is the result?
Practice Answers
Answer 1: Who Has the Opposition?
White has the opposition
Black must move, so White has the direct opposition.
After:
1...Kd7
White should play:
2.Kf6!
White reaches f6, a key square for the pawn on e4.
The position is winning for White.
Answer 2: Change the Side to Move
Black has the opposition
White must move first, so Black has the direct opposition.
A drawing continuation is:
1.Kd5 Kd7 2.Kc5 Kc7
Black mirrors the White king and keeps it away from the key squares.
The position is drawn with correct defense.
Answer 3: Distant Opposition
White has distant opposition
Five squares lie between the kings.
Five is odd.
Because Black must move, White has the distant opposition.
For example:
1...Ke7 2.Ke3 Ke6 3.Ke4
The position becomes direct opposition with Black to move.
Answer 4: Opposition or Promotion?
1.b7!
White can take direct opposition with 1.Kc3?, but Black then plays:
1...Kxb6
The correct move is:
1.b7!
The pawn will promote on b8.
Before seeking opposition, always check for a direct pawn advance or promotion.
Answer 5: The Rook-Pawn Corner
The position is drawn
White has a rook pawn.
The Black king has reached the corner a8.
White cannot force the king away.
After:
1.a7
Black has no legal move and is not in check.
The game ends in stalemate.