MESON Chess Problem Database

Problem Display
PID: 68798 (8/6K1/2P3P1/1BB1k3/6p1/p5P1/6P1/1Q6 w - - 0 1)

Servais, Albert

Het Belgisch Schaakbord (L'Echiquier Belge), 1956

8/6K1/2P3P1/1BB1k3/6p1/p5P1/6P1/1Q6

#2

8 + 3

5454 Near Snap 2018
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qf5#
    • 1...Ke6
      • 2.Qe4#
  • Tries
    • 1.Kf7?
      • 1...Kd5
        • 2.Qf5#
      • 1...a2!
    • 1.Qc2?
      • 1...Kd5
        • 2.Qf5#
      • 1...Ke6
        • 2.Qe4#
      • 1...a2!
    • 1.Qd3?
      • 1...Ke6
        • 2.Qe4#
      • 1...a2!
    • 1.Qb3?
      • 1...Ke4
        • 2.Qe6#
      • 1...Kf5
        • 2.Qd5#
      • 1...a2!
    • 1.c7?
      • 1...Kd5
        • 2.Qf5#
      • 1...Ke6
        • 2.Qe4#
      • 1...a2!
  • Keys
    • 1.Qa2!
      • 1...Ke4
        • 2.Qe6#
      • 1...Kf5
        • 2.Qd5#

This anticipates 177917(1982), 200088(1982), 234983(2013)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • K(c);P-FLIGHT::QAR2(A)
  • Tries
    • Try
      • K(H);P-FLIGHT
      • Vars
        • K(c);P-FLIGHT::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • K(c);P-FLIGHT::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • K(c);P-FLIGHT::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • K(c);P-FLIGHT::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • P(F);
      • Vars
        • K(c);P-FLIGHT::QAR2(A)
      • Refutation
        • P(a);
  • Actual
    • Q(A);
    • Vars
      • K(c);P-FLIGHT::QAR2(A)
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