CHESS Puzzles, Problems with solutions - mate in 3

CHESS PUZZLE:

White to move and mate in 3 moves.

 
In this Chess puzzle, White to move and mates Black in 3 moves. The three pawns in the 7th rank are ready to be promoted. Note that this position is symmetrical. No matter which pawn Black captures, the solution to this chess problem of promoting pieces are the same, i.e. Bishop and then Rook.

SOLUTION:

1. Bd8=B.

1. Kxc6.

4. Rb8=R.

5. Kd6.

6. Rb6 checkmate.