MESON Chess Problem Database

Problem Display
PID: 211353 (4k3/8/2K3P1/1pQ5/1P6/8/8/8 w - - 0 1)

Speckmann, Werner

The Problemist, 1986

4k3/8/2K3P1/1pQ5/1P6/8/8/8

#2

4 + 2

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd8
      • 2.Qf8#
  • Tries
    • 1.Qf2?
      • 1...Kd8
        • 2.Qf8#
      • 1...Ke7!
    • 1.Qd5?
      • 1...Kf8
        • 2.Qf7#
      • 1...Ke7!
    • 1.Qf5?
      • 1...Kd8
        • 2.Qd7#
        • 2.Qf8#
      • 1...Ke7!
    • 1.g7?
      • threat
        • 2.Qf8#
        • 2.g8Q#
      • 1...Kd8
        • 2.Qf8#
        • 2.g8Q#
        • 2.g8R#
      • 1...Kf7!
  • Keys
    • 1.Qa7!
      • 1...Kd8
        • 2.Qd7#
      • 1...Kf8
        • 2.Qf7#

Anticipated by 206698(1925), 227651(1926), 77626(1947)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR2(B)
  • Tries
    • Try
      • Q(B);
      • Vars
        • K(b);P-FLIGHT::QAR2(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • P(D);
      • Threat
        • DUALS(2)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(b);P-FLIGHT::QAR1(B)
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