Test your chess: Reitstein problem 186
Black to play and win
Position after 1 g3-g4
D Endean v MC Rubery 1989
Solution
1…Rh2 is fairly obvious, and there aren't many variations: if the rook is taken, Qh4+ and Qh1mate. The f pawn is pinned to the queen, so it is game over.
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allanbeardsworth 
Reblogged this on Chess Musings and commented:
Not very hard but a fairly useful pattern. Hopefully, after you look at it once, it remains in your bag of tactical tricks forever.