Queen bishop battery mate

A "Queen Bishop Battery Mate" in chess is a checkmate pattern where the queen and bishop are positioned to work together, often on the same diagonal, to deliver checkmate. 
Here's how to understand and execute this mate:
1. What is a "battery" in chess?
A battery is formed when two pieces of the same color are aligned on a rank, file, or diagonal, and the first piece (the one closest to the opponent's king) moves out of the way to allow the second piece to deliver a powerful attack (often check or checkmate). 
2. Queen and Bishop Battery:
In this case, the battery involves your Queen and Bishop, typically on the same diagonal.
The bishop is usually positioned closer to the opponent's king, and the queen is behind it on the same diagonal. 
3. How it works:
Attacking the King: The bishop controls squares on the diagonal, potentially limiting the opponent's king's escape squares.
Queen's Support: The queen is positioned behind the bishop, ready to move along the same diagonal when the bishop moves.
The Checkmate: When the bishop moves away, it reveals the queen's attack on the king, delivering checkmate. 
4. Key Elements (Specific examples):
Balestra Mate: This pattern involves the bishop delivering the mate, with the queen covering all of the king's possible escape squares.
Queen and Bishop on H6/A6 and controlling the H7/A7 diagonal: In this common scenario, the attacking queen is on h6 (or a6) relative to the opponent's king on g8 (or b8), and the bishop controls the diagonal leading to h7 (or a7). 
5. Important Considerations:
The King's Confinement: The opponent's king needs to be confined, either by your pieces, their own pieces, or the edge of the board, so there are no escape squares when the battery attacks.
Creating Weaknesses: Sometimes, a bishop can be sacrificed to weaken the opponent's pawn structure, particularly around the castled position, allowing the queen to penetrate and deliver the mate.
Coordination: The queen and bishop work together effectively. The bishop can control squares, and the queen can provide the final blow. 
In essence, the Queen Bishop Battery Mate is a powerful attack where the bishop clears the path for the queen to deliver checkmate, often after restricting the opponent's king's movement.