MESON Chess Problem Database

Problem Display
PID: 253003 (8/5K2/p7/5k2/2Q5/5P2/1R1P4/8 w - - 0 1)

Bieri, Johann Nepomuk

idee & form, 2007

8/5K2/p7/5k2/2Q5/5P2/1R1P4/8

#2

5 + 2

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...a5
      • 2.Rb5#
  • Tries
    • 1.Kg7?
      • 1...Kg5
        • 2.Qg4#
      • 1...a5
        • 2.Rb5#
      • 1...Ke5!
    • 1.Rb4?
      • threat
        • 2.Qd5#
        • 2.Qf4#
        • 2.Qc5#
      • 1...Ke5
        • 2.Qe6#
        • 2.Qc5#
      • 1...Kg5!
    • 1.Qc7?
      • 1...a5
        • 2.Rb5#
      • 1...Kg5!
  • Keys
    • 1.Rb6!
      • 1...Ke5
        • 2.Qe4#
      • 1...Kg5
        • 2.Qg4#
      • 1...a5
        • 2.Rb5#

This is after 15148

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);N_GUARD::R(A)
  • Tries
    • Try
      • K(E);P-FLIGHT
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAR1(D)
        • P(b);N_GUARD::R(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(A);
      • Threat
        • DUALS(3)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(D);
      • Vars
        • P(b);N_GUARD::R(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • R(A);
    • Vars
      • K(a);N_GUARD,P-FLIGHT::QAR1(D)
      • P(b);N_GUARD::R(A)
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