MESON Chess Problem Database

Problem Display
PID: 274775 (8/1R6/8/3k4/1K4N1/8/7Q/8 w - - 0 1)

Flatt, Karl

Zurcher Woche, 1961

8/1R6/8/3k4/1K4N1/8/7Q/8

#2

4 + 1

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Qe5#
  • Tries
    • 1.Re7?
      • 1...Kd4
        • 2.Qd6#
        • 2.Qd2#
      • 1...Kc6!
    • 1.Qf4?
      • 1...Ke6
        • 2.Qe5#
      • 1...Kc6!
    • 1.Qc7?
      • 1...Kd4
        • 2.Qc4#
      • 1...Ke6
        • 2.Qe5#
        • 2.Qd7#
      • 1...Ke4!
    • 1.Qd2+?
      • 1...Kc6
        • 2.Qd7#
      • 1...Ke6
        • 2.Qd7#
      • 1...Ke4!
  • Keys
    • 1.Qh7!
      • 1...Kd4
        • 2.Rd7#
      • 1...Kc6
        • 2.Qd7#
      • 1...Kd6
        • 2.Qd7#
      • 1...Ke6
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);N_GUARD,S_FLIGHT::QAR1(A)
  • Tries
    • Try
      • R(D);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);N_GUARD,P-FLIGHT::R(D)
      • K(a);N_GUARD,S_FLIGHT::QAB1(A)
      • K(a);N_GUARD,P-FLIGHT::QAR1(A)
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