Chess puzzle – checkmate in 9

Will start adding the not so bad games that I play while commuting or cooking, useful for practice and to challenge yourself on game ending and other chess topics.

This is position where black is almost dead, but the key is to find the best combination for white. Chess engine finds a checkmate in 9, the beauty of this challenge is how to coordinate white pieces.

Qe2 is the key, then there are several good and bad combinations, the game ended up like this. Try to see if you can spot the possible options, enjoy the game!