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A problem which illustrates the typical structure of a logical
more-mover, where White’s mainplan must be preceded by
foreplans designed to induce necessary weaknesses in the black
Solution: White would like to threaten f3 mate, but an
immediate 1.Kd2? fails to the check on a5. The foreplan 1.Kc2?,
threatening 2.Sc5+ or Sd2+ Kd4 3.Se6 mate works after 1...Sc7 2.Kd2,
but fails to 1...Re8, so a further foreplan is necessary to eliminate
this defence. The key, 1.Kd1, threatens 2.f3+ Ke3 3.Sf5 mate,
and the only defence is 1...Se7 (1...Sd6 only delays the
mate for a move while the S is captured). Now 2.Kc2 forces
2...Sc7, and with no bishop check available the mainplan
3.Kd2 any 4.f3 mate works.
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