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Miscellaneous Problems

Solution

Werner Keym
Die Schwalbe, 1979

[8888/3P4/PPk5/NN6/2K5]

6+1. Last move?

Clearly White did just check Black with Na2+ but what did Black played just before that?

Last move really was -1. Nb4xBa2!! and Black earlier move was Bb1-/xa2.

This is an excellent example of the economic "last-move?"" problem (type C).