MESON Chess Problem Database

Problem Display
PID: 237823 (8/1KP1k1P1/8/7Q/8/8/8/8 w - - 0 1)

Speckmann, Werner

Arbejder-Skak, 1964

8/1KP1k1P1/8/7Q/8/8/8/8

#2

4 + 1

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qd5?
      • 1...Ke8
        • 2.Qe6#
      • 1...Kf6!
    • 1.Qe5+?
      • 1...Kd7
        • 2.c8Q#
      • 1...Kf7!
    • 1.c8Q?
      • 1...Kd6
        • 2.Qhc5#
      • 1...Kf6!
  • Keys
    • 1.Qf5!
      • 1...Kd6
        • 2.c8S#
      • 1...Ke8
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::P=Q
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • P(C);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::P=S
      • K(a);P-FLIGHT::QAR2(A)
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