Daily chess puzzle

Today’s problem is from the July 1979 Chess magazine. I have hundreds (many hundreds) of magazines on my book shelves, and I thought I would dip into them; and thought I would start with going forty years back.

As has been my custom on this blog for a while, I adopt the style of only saying which side is to play: and not giving an idea if the move wins or otherwise, unless on occasion I think signposting would be helpful. Instead, the problems are posed with the instruction to decide what you would play, as in a game.

White to play

Nilsson v Sorensen, Aalborg 1979

Solution

The first few moves are obvious. 1 Qh5+ Kg8[] 2 Ng5 Re8[]

Now what?

Only 3 Rf3! wins. Other moves let Black’s king slip away from the mating zone, or enable Black to capture on e5 and hold things together, when he wins.

FEN

rqb2r2/pp3ppk/4p1n1/3pP1Q1/1Pn5/R4N2/1BP2P1P/4K2R w K – 0 1