MESON Chess Problem Database

Problem Display
PID: 274777 (6K1/1P1k1P2/8/8/2Q5/8/8/8 w - - 0 1)

Speckmann, Werner

Zurcher Woche, 1968

6K1/1P1k1P2/8/8/2Q5/8/8/8

#2

4 + 1

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Tries
    • 1.Kf8?
      • 1...Kd8
        • 2.Qc8#
      • 1...Kd6!
    • 1.Qd5+?
      • 1...Ke7
        • 2.f8Q#
      • 1...Kc7!
    • 1.Qc5?
      • 1...Kd8
        • 2.Qd6#
      • 1...Ke6!
    • 1.Qc6+?
      • 1...Ke7
        • 2.f8Q#
      • 1...Kd8
        • 2.Qd6#
        • 2.f8Q#
      • 1...Kxc6!
    • 1.Qc8+?
      • 1...Ke7
        • 2.f8Q#
      • 1...Kd6!
    • 1.b8S+?
      • 1...Ke7
        • 2.f8Q#
      • 1...Kd8
        • 2.f8Q#
      • 1...Kd6!
    • 1.b8B?
      • 1...Kd8
        • 2.Qc7#
      • 1...Ke7!
  • Keys
    • 1.f8B!
      • threat
        • 2.Qc8#
      • 1...Kd8
        • 2.Qc8#
      • 1...Ke8
        • 2.Qc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);N_GUARD,P-FLIGHT::P=Q
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);N_GUARD,P-FLIGHT::P=Q
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::P=Q
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • P(B);CHECK
      • Vars
        • K(a);P-FLIGHT::P=Q
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • P(B);
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • P(C);
    • Threat
      • QAB1(A)
    • Vars
      • K(a);P-FLIGHT::QAR1(A)
      • K(a);S_FLIGHT::QAR2(A)
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