2 mines left, and this is supposed to be No-guess.
However, it seems that there can be two answers to this -
(A) The top square of the top pair and the top square of the bottom pair, can both be mines.
(B) The bottom square of the top pair and the bottom square of the bottom pair, can both be mines.
But then this is not really guess free, is it ?
(Note - I did go with option (A), and it proved to be right. But my original question still stands).
What am I missing ?
Yeah they make guess-free versions now. It's much more fun when you know that you're too stupid to finish it and it's not simply impossible! In a normal version OP would have probably guessed one at random fairly quickly, but here OP kept thinking "what am I missing?".