MESON Chess Problem Database

Problem Display
PID: 30870 (1K5Q/8/3N1p2/4k3/1P3N2/8/5P2/8 w - - 0 1)

Taylor, I(J)ohn Odin Howard

The Westminster Papers, 1875

1K5Q/8/3N1p2/4k3/1P3N2/8/5P2/8

#2

6 + 2

5454 Near Snap 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qxf6#
  • Tries
    • 1.Kc7?
      • 1...Kd4
        • 2.Qxf6#
      • 1...Kxf4!
    • 1.Kc8?
      • 1...Kd4
        • 2.Qxf6#
      • 1...Kxd6
        • 2.Qxf6#
      • 1...Kxf4!
    • 1.Qh3?
      • 1...Kd4
        • 2.Qe3#
      • 1...Kxf4
        • 2.Qf5#
        • 2.Qg3#
      • 1...Kxd6
        • 2.Qe6#
      • 1...f5!
    • 1.Qc8?
      • 1...Kd4
        • 2.Qc5#
      • 1...Kxf4
        • 2.Qf5#
      • 1...Kxd6
        • 2.Qe6#
        • 2.Qc7#
      • 1...f5!
    • 1.Qe8+?
      • 1...Kd4
        • 2.Qe3#
      • 1...Kxd6
        • 2.Qe6#
      • 1...Kxf4!
  • Keys
    • 1.Qg7!
      • 1...Kd4
        • 2.Qxf6#
      • 1...Kxf4
        • 2.Qg3#
      • 1...Kxd6
        • 2.Qc7#

This anticipates 214456(1878), 214590(1878), 222466(1883), 181844(1905), 28736(1927)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB(F),XP(b)
  • Tries
    • Try
      • K(E);S_FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAB(F),XP(b)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT,XS(C)
    • Try
      • K(E);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAB(F),XP(b)
        • K(a);N_SPINP(b),S_FLIGHT,XS(D)::QAR2(F),XP(b)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT,XS(C)
    • Try
      • Q(F);N_PINP(b)
      • Vars
        • K(a);S_FLIGHT::QAB1(F)
        • K(a);S_FLIGHT,XS(D)::QAR1(F)
      • Refutation
        • P(b);
    • Try
      • Q(F);N_PINP(b)
      • Vars
        • K(a);S_FLIGHT::QAB1(F)
        • K(a);S_FLIGHT,XS(C)::QAR1(F)
      • Refutation
        • P(b);
    • Try
      • Q(F);CHECK,N_PINP(b)
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(F)
        • K(a);S_FLIGHT,XS(D)::QAR1(F)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
  • Actual
    • Q(F);
    • Vars
      • K(a);S_FLIGHT::QAB(F),XP(b)
      • K(a);N_SPINP(b),OGATEB,S_FLIGHT,XS(C)::QAB1(F)
      • K(a);N_SPINP(b),OGATEB,S_FLIGHT,XS(D)::QAB1(F)
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