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Chess Problem 1999e1a501

Jörg Kuhlmann & BDS

The Problemist, 1999

B7/4b3/8/kb5R/1r1S1PQ1/6Pr/5P2/4K3

R#2
KöKo 

1.Be4!  (2.Sf3 Rxe4#)

1...Rxg3 2.Qf3 Rg1#
1...Rxd4 2.Bf3 Bb4#

For White to be mated the wPf2 has to be blocked. In the threat and both variations this is done by a specific piece moving to f3. This triple-avoidance is for very mixed reasons.

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