BDS
Hull Chess Club Magazine, 1995 (After Cyril S Kipping, Hull Times, 1922
#2
1.d8=S! (2.Rd5#) 1...Rxc7+ 2.Qxc7# 1...Bxe6+ 2.Rxe6# 1...Bxd8 2.Qd2# 1...Rd1 2.Bxc5#
The underpromotion key allows two checks to the wK, each met by a return capture mate. Not as exciting as cross-checks. The Kipping had the promotion key and the rook check.
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