King & Two Bishops vs King

Start by centralizing your king — it must help the bishops.

♔︎e2 — 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.

Keep centralizing — the king needs to be active before the bishops can do their work.

♔︎f3 — 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.

Develop a bishop to an active central diagonal.

Now it's time to develop the dark-squared bishop. ♗︎e3 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.

Push your king forward — it must work with the bishops to restrict the opponent.

♔︎f4 — The king advances further, pressing forward to support the bishops. From f4, the king controls e5 and e4, working with ♗︎e3 to limit the black king's central squares.

Develop the second bishop with a check to gain tempo.

Developing the light-squared bishop with tempo — the check forces Black to move immediately. ♗︎c4 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.

Keep the king pressing forward, always supporting the bishops.

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

Occupy the center with your king — dominate the board.

♔︎e5 — 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.

Reposition the bishop to create a diagonal wall cutting off the king.

♗︎b5 — 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.

Follow the defending king — keep your king close.

♔︎d6 — 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.

Create a second diagonal barrier — form a "V" with both bishops.

The dark bishop repositions to d4, creating a second diagonal barrier on the a1-h8 line. Now both bishops form a "V" shape — ♗︎b5 on the a4-e8 diagonal and ♗︎d4 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.

Give check while maintaining your diagonal barrier.

Check! The dark bishop leaps to f6, giving check while maintaining the diagonal barrier. This forces the king back toward the corner. Notice that ♗︎f6 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.

Use the other bishop to check and push the king toward the corner.

♗︎a6+ — 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.

Bring your king closer to seal off all escape routes.

♔︎c6 — 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.

Shadow the king — keep following it toward the corner.

♔︎b5 — 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.

Seal a7 with your king — trap the opponent in the corner.

♔︎b6 — 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.

Check to force the king back to the corner for the final blow.

♗︎e5+ — 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 ♗︎a6 and c7 is adjacent to ♔︎b6.

Deliver checkmate with the bishop!

Checkmate! The light bishop delivers the final blow from b7. The king on a8 is attacked by ♗︎b7, and every escape is sealed: a7 is controlled by ♔︎b6, b8 is controlled by ♗︎e5 (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.