Knighty
Login
EndgamesPlay as white

King & Two Bishops vs King

Learn to checkmate with two bishops by creating diagonal barriers, coordinating your pieces, and driving the lone king into a corner.

Try Interactive Lesson

Introduction

The King and Two Bishops checkmate is the hardest of the basic checkmate patterns. Unlike the queen or rook, two bishops cannot force checkmate on their own — the king must actively participate, working in concert with both bishops to build an inescapable net. The key technique is creating diagonal barriers — the bishops form a "V" shape that restricts the defending king's movement, while your king closes in to shrink the available space. The defending king must be driven to a corner where the bishops can deliver the final blow. Be warned: careless play can lead to stalemate, so precision matters at every step.

Lesson Content

8
7
6
5
4
3
2
1
a
b
c
d
e
f
g
h
View on Analysis Board
1. Ke2

Step one: centralize the king. Unlike checkmates with a queen or two rooks, the king is essential in the two-bishop technique. It must march toward the center to support the bishops in restricting the defending king. The bishops stay on their starting squares for now — there's no rush to develop them until the king is positioned to support their barriers.

Piece ActivityTablebase Win
Alternative Moves
Bf4+ — This check actually draws! After Ke4, the bishops cannot coordinate properly. Always centralize the king first.
1
2
3
4
5
6
7
8
h
g
f
e
d
c
b
a
1. ..Kd4

The best defense — Black charges toward White's pieces. By staying in the center, the defending king maximizes its mobility and makes it harder for White to create effective barriers.

Piece Activity
8
7
6
5
4
3
2
1
a
b
c
d
e
f
g
h
2. Kf3

Continuing to centralize the king. From f3, the king controls important squares and is ready to support bishop development. The king needs to reach the central zone before the bishops can begin their restricting work.

Piece ActivityTablebase Win
1
2
3
4
5
6
7
8
h
g
f
e
d
c
b
a
2. ..Ke5

Black occupies the center, maintaining maximum mobility. This is the correct defensive idea — stay as far from the edges and corners as possible.

Piece Activity
8
7
6
5
4
3
2
1
a
b
c
d
e
f
g
h
3. Be3

Now it's time to develop the dark-squared bishop. Be3 is a strong centralizing move — the bishop controls the key d4-a7 diagonal and begins to restrict the black king's options. With the king on f3 supporting, the bishop can safely take up an active post.

Piece ActivityTablebase Win
1
2
3
4
5
6
7
8
h
g
f
e
d
c
b
a
3. ..Kd5

Black keeps the king central, the best defensive strategy. The defending king should avoid moving toward edges or corners for as long as possible.

Piece Activity
8
7
6
5
4
3
2
1
a
b
c
d
e
f
g
h
4. Kf4

The king advances further, pressing forward to support the bishops. From f4, the king controls e5 and d5, working with Be3 to limit the black king's central squares.

Piece ActivityTablebase Win
1
2
3
4
5
6
7
8
h
g
f
e
d
c
b
a
4. ..Ke6

The black king retreats. Being pushed out of the center is the beginning of the end — from here, White's pieces will gradually squeeze the king toward the edge.

Piece Activity
8
7
6
5
4
3
2
1
a
b
c
d
e
f
g
h
View on Analysis Board
5. Bc4+

Developing the light-squared bishop with tempo — the check forces Black to move immediately. Bc4 activates the second bishop on the powerful a2-g8 diagonal, and both bishops now work together to create diagonal barriers that cut the board in two. This is the moment the technique clicks: two bishops on active diagonals create a net the king cannot escape.

Piece ActivityTablebase Win
Alternative Moves
Ke4 — This is equally optimal but misses the chance to develop the bishop with tempo. When you can gain a free move with check, take it.
1
2
3
4
5
6
7
8
h
g
f
e
d
c
b
a
5. ..Kd6

Forced to retreat from the check. The black king moves to d6, but it's already running out of room. Both bishops now control long diagonals that restrict the king's movement.

Piece Activity
8
7
6
5
4
3
2
1
a
b
c
d
e
f
g
h
6. Kf5

The white king continues its relentless advance. From f5, it controls e6, e5, d6 — directly pressuring the black king's position. The squeeze is on: king on f5, bishops on c4 and e3, all working together.

Piece ActivityTablebase Win
1
2
3
4
5
6
7
8
h
g
f
e
d
c
b
a
6. ..Kd7

Black retreats further from the center. The king is being pushed toward the queenside — exactly what White wants.

Piece Activity
8
7
6
5
4
3
2
1
a
b
c
d
e
f
g
h
7. Ke5

A powerful centralizing move. The king on e5 dominates the center and controls d6, which prevents the black king from returning. Combined with the bishops, White now controls a huge swath of the board.

Piece ActivityTablebase Win
1
2
3
4
5
6
7
8
h
g
f
e
d
c
b
a
7. ..Kc7

The black king drifts toward the queenside. The center is no longer accessible — White's king and bishops have sealed it off.

Piece Activity
8
7
6
5
4
3
2
1
a
b
c
d
e
f
g
h
View on Analysis Board
8. Bb5

A critical repositioning. The light bishop moves to b5, creating a diagonal barrier on the a4-e8 line. This cuts off the black king from returning to the kingside — the bishop acts like a wall the king cannot cross. This is the heart of the two-bishop technique: diagonal barriers restrict the king to one side of the board, then a corner.

Cutting Off the KingTablebase Win
Alternative Moves
Bb6+ — This check is a draw! The king escapes and the bishops lose coordination. Not every check is a good check — sometimes repositioning is stronger.
1
2
3
4
5
6
7
8
h
g
f
e
d
c
b
a
8. ..Kb8

The king retreats to the back rank. The diagonal barrier from Bb5 prevents any return to the center — the king is now confined to the queenside.

Piece Activity
8
7
6
5
4
3
2
1
a
b
c
d
e
f
g
h
9. Kd6

The king follows the retreating black king. In the two-bishop technique, the king must shadow the opponent's king, staying close enough to prevent escape while the bishops maintain their barriers.

Piece ActivityTablebase Win
1
2
3
4
5
6
7
8
h
g
f
e
d
c
b
a
9. ..Kc8

Pushed to the c8 corner area. The black king is running out of room — the back rank offers fewer escape routes.

Piece Activity
8
7
6
5
4
3
2
1
a
b
c
d
e
f
g
h
10. Bd4

The dark bishop repositions to d4, creating a second diagonal barrier on the a1-h8 line. Now both bishops form a "V" shape — Bb5 on the a4-e8 diagonal and Bd4 on the a1-h8 diagonal. The black king is trapped between these two barriers. This is the classic two-bishop formation: the diagonals converge to squeeze the king into a corner.

Cutting Off the KingTablebase Win
1
2
3
4
5
6
7
8
h
g
f
e
d
c
b
a
10. ..Kd8

The king tries to escape via the d-file, but the diagonal barriers prevent any meaningful progress. The walls are closing in.

Piece Activity
8
7
6
5
4
3
2
1
a
b
c
d
e
f
g
h
11. Bf6+

Check! The dark bishop leaps to f6, giving check while maintaining the diagonal barrier. This forces the king back toward the corner. Notice that Bf6 controls both e7 and g7, preventing the king from escaping to the kingside. Using checks to gain tempo while keeping barriers intact is the hallmark of the two-bishop technique.

Cutting Off the KingTablebase Win
1
2
3
4
5
6
7
8
h
g
f
e
d
c
b
a
11. ..Kc8

Forced back to c8. Ke8 is blocked by the Bb5 diagonal (b5 controls e8), and Bf6 controls e7. The king is being funneled toward the a8 corner.

Piece Activity
8
7
6
5
4
3
2
1
a
b
c
d
e
f
g
h
12. Ba6+

Another forcing check! The light bishop moves to a6, checking from the a6-c8 diagonal. This drives the king further toward the corner. The bishops are taking turns checking — each check pushes the king one step closer to a8.

Cutting Off the KingTablebase Win
1
2
3
4
5
6
7
8
h
g
f
e
d
c
b
a
12. ..Kb8

The only legal move. Kd8 is controlled by Bf6 (d8 diagonal), Kd7 is adjacent to Kd6, and Kb7 is controlled by Ba6. The king is forced toward a8.

Piece Activity
8
7
6
5
4
3
2
1
a
b
c
d
e
f
g
h
13. Kc6

The king advances to c6, controlling b7, b6, and c7 — sealing off the escape routes. The noose tightens: the king on c6 and bishops on a6 and f6 create a nearly airtight cage around the black king.

Piece ActivityTablebase Win
1
2
3
4
5
6
7
8
h
g
f
e
d
c
b
a
13. ..Ka7

The king tries to flee via the a-file. This is the best defense — Ka8 would allow a faster mate. But the bishops and king are perfectly positioned to finish the job.

Piece Activity
8
7
6
5
4
3
2
1
a
b
c
d
e
f
g
h
14. Kb5

The king shadows the black king's retreat, moving to b5 to maintain control of a6, a5, a4, b6, c6. The defending king has nowhere to hide — it must go to the corner.

Piece ActivityTablebase Win
1
2
3
4
5
6
7
8
h
g
f
e
d
c
b
a
14. ..Ka8

Into the corner — exactly where White has been driving the king for the entire game. Both Ka8 and Kb8 are equally hopeless, but the corner is the final destination.

Piece Activity
8
7
6
5
4
3
2
1
a
b
c
d
e
f
g
h
15. Kb6

The king moves to b6, controlling a7 and completing the cage. The black king on a8 now has only one escape square (b8), and even that is temporary. The checkmate setup begins.

Piece ActivityTablebase Win
1
2
3
4
5
6
7
8
h
g
f
e
d
c
b
a
15. ..Kb8

The only legal move. a7 is controlled by the white king on b6. The black king shuttles between a8 and b8, but there is no escape.

Piece Activity
8
7
6
5
4
3
2
1
a
b
c
d
e
f
g
h
16. Be5+

Check! The dark bishop delivers a decisive check from e5, controlling the b8-h2 diagonal. The king on b8 must return to a8 — there is nowhere else to go since c8 is controlled by Ba6 and c7 is adjacent to Kb6.

Cutting Off the KingTablebase Win
1
2
3
4
5
6
7
8
h
g
f
e
d
c
b
a
16. ..Ka8

Forced back to the corner. The king on a8 has no legal moves except to wait for the inevitable — Kb7 is controlled by Ba6, and a7 is controlled by Kb6.

Piece Activity
8
7
6
5
4
3
2
1
a
b
c
d
e
f
g
h
17. Bb7#

Checkmate! The light bishop delivers the final blow from b7. The king on a8 is attacked by Bb7, and every escape is sealed: a7 is controlled by Kb6, b8 is controlled by Be5 (along the b8 diagonal), and b7 is occupied. The two bishops and king have created a perfect mating net. In 17 moves, White centralized, built diagonal barriers, drove the king to the corner, and delivered checkmate — the complete two-bishop technique.

Tablebase Win

Key Takeaways

  • The king must actively participate — two bishops alone cannot force checkmate
  • Centralize all three pieces (king + both bishops) before beginning the squeeze
  • Create diagonal barriers with the bishops to restrict the defending king to one side of the board
  • Use checks with tempo to drive the king toward a corner, but beware of stalemate traps
  • Shadow the defending king with your own king, always staying close to seal escape routes

Summary

You've mastered the most challenging basic checkmate. The two-bishop technique requires three coordinated pieces working in harmony: the king provides close support, while the bishops create diagonal barriers that progressively shrink the defending king's territory. Unlike simpler checkmates, every move must be precise — one careless check can throw away the win with stalemate.

Ready to Practice?

Practice Interactively