MESON Chess Problem Database

Problem Display
PID: 234532 (K2NkN2/PP6/8/1p6/1Q6/8/8/8 w - - 0 1)

Speckmann, Werner

Deutsche Schachzeitung, 1978

K2NkN2/PP6/8/1p6/1Q6/8/8/8

#2

6 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd8
      • 2.b8Q#
  • Tries
    • 1.Qe1+?
      • 1...Kxd8
        • 2.b8Q#
      • 1...Kxf8!
    • 1.Qa3?
      • 1...Kxd8
        • 2.b8Q#
      • 1...b4!
    • 1.Qc5?
      • 1...Kxd8
        • 2.b8Q#
        • 2.b8R#
      • 1...b4!
    • 1.Qe4+?
      • 1...Kxd8
        • 2.b8Q#
      • 1...Kxf8!
  • Keys
    • 1.Sg6!
      • threat
        • 2.Qe7#
      • 1...Kd7
        • 2.Qe7#
      • 1...Kxd8
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT,XS(E)::P=Q
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT,XS(E)::P=Q
      • Refutation
        • K(b);P-FLIGHT,XS(F)
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT,XS(E)::P=Q
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT,XS(E)::P=Q
      • Refutation
        • P(a);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT,XS(E)::P=Q
      • Refutation
        • K(b);P-FLIGHT,XS(F)
  • Actual
    • S(F);
    • Threat
      • QAR1(A)
    • Vars
      • K(b);S_FLIGHT::QAR1(A)
      • K(b);P-FLIGHT,XS(E)::QAB1(A)
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