Here is another Puzzle I've posted
http://www.chess.com/forum/view/more-puzzles/mate-in-three36
1. Move rook from B2 to C2.
2. Black's king should capture the rook, or else the solution will not work.
3. Finally, capture the king with your D3 bishop. Voila!
Here is another Puzzle I've posted
http://www.chess.com/forum/view/more-puzzles/mate-in-three36