Black and White

deutsche schachzeitung chess problem

From Deutsche Schachzeitung, 1890. White to mate in two moves.

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With the waiting move 1. Kh2! White forces Black to abandon some vital defense: If the Nb3 moves, then 2. b4#. If 1. … Nb5, then 2. Qa6#. If the Nd6 moves elsewhere, then 2. Nb7#. If 1. … Bb5, then 2. Qc7#. If the black bishop moves elsewhere along the a6-f1 diagonal, then 2. Nxb3#. If the black bishop moves along the a2-g8 diagonal, then 2. Qa6#. Note that the white king’s move must be to h2 — any other move leaves him exposed to a check by Black.