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The eminent German composer Herbert Ahues, who died on 11th July 2015 at the age of
93, specialised in two-movers featuring white line play, often in combination with try play. This week’s problem is a typical example of his work.
Solution: The Nowotny try 1.Rf3?, threatening 2.Qxe4 and 2.Qc3, is refuted by 1...d5! The bishop at e6 can move to threaten 2.Re7. Since this threat cuts the bishop guard of f6, Black can defend by closing the rook guard on the same square.1.Bg8? is refuted by 1...Qa2!, so the bishop moves down the long diagonal.1.Bd5? fails to 1...Rf3!, since the bishop has closed the queen’s path to e4, while 1.Bc4? fails to 1...Bf3!, as this time the queen cannot reach c3. The key is 1.Bb3!
(threat 2.Re7) with variations 1...Rf3 2.Qxe4, 1...Bf3 2.Qc3,1...d5 2.Qe6 and 1...Sf5, Sf7 or Sg8 2.Rf5.
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