"The Punching Bag" Strikes Back

The following diagram is the aftermath of a stunning Checkmate I received at the hands of a good friend, Abel M. 

 

Abel and I have played against each other over for 3 years during our work breaks.  He was a novice player and he lost so often that we very unkindly nicknamed him, "The Punching Bag". 

 

But Mr. Abel turned the tables around in dramatic fashion with a lethal combination that won his first ever game against me. 

 

I was leading in material but found myself in an awkward position with a Queen and Rook on the same file as my King.  Realizing this threat, I reacted slowly with Rfe8.

 

Can you find the Knockout Blow?

 

 

And it was all over but the weeping.  (Which I did).

 

But I had to hand it to him for coming up with that finish.

 

Even if I had defended better (maybe Kf8 instead of Bxg7), my position was badly damaged.

 

To drive the point home, Abel beat me in the following game too. 

 

Lesson learned: never underestimate your opponent.

 

Thankfully, there are always people like Abel to keep me (quite literally) in Check.