BDS
Correspondence Chess, 2000
#3
1.d5! (2.Bd4+ Kd2 3.Rd1#) 1...Sb5 2.Rf7 & 3.Sf1# 1...Se6 2.Bd1 & 3.Sg4#
Antipatory interference. Black's defences commit the error of blocking a line along which he will want to defend against a later threat.
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