Mate in 4

It's a variation to the smothered mate and a nice one. It's even better when the white queen starts on c5.

It's a variation to the smothered mate and a nice one. It's even better when the white queen starts on c5.
Yes, however in the real game, this was the position,so I didn’t want to change it.

Ah yes a queen saqufice, I had a game against computer 11 and i had this same position, if I knew I had mate in 4, I would of beaten computer 11 in one attempt, big rip. Back to the drawing board
I wonder if white seen this combination and set it up in previous moves or if he stumbled on to a great tactic......I am not that strong of a solver and usually take too much time to solve a puzzle,but I seen the combination of moves on this one almost immediately. Would that make this a lower rated puzzle?
@sameez1: It's the one tactic every visitor is confronted with within a week from signing up to a chess site. It's the smothered mate - in disguise. That's why you intuitively recognized it straight away.
It's not particularly easy because beginners commonly won't find the solution by themselves when they see this type the first time. But the infinite reposting of these puzzles makes them as easy as walking after a while. Though learning to walk is really really very hard!