Test your chess: Reitstein problem 105
Black to play: what result?
G Dean v GS Wallis. 1962
Solution
White's last move was Nd2-f3, no doubt expecting the rook to retreat, but 1…Re4! is not too hard to see, when white is forced to play 2 Re4 de, forking the two knights: an unusual occurrence of Purdy's potassium cyanide which I have blogged about previously.
Not too hard today: even if Re4 weren't seen on inspection, it would be seen by employing Purdy's examine all biffs mantra.
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allanbeardsworth 
Reblogged this on Chess Musings and commented:
Examine all your checks, captures and threats in order to spot a most enjoyable tactical shot.