MESON Chess Problem Database

Problem Display
PID: 214456 (7Q/8/1K1N1p2/4k3/5N2/8/5P2/8 w - - 0 1)

Foster, Benjamin R

St. Louis Globe Democrat, 1878

7Q/8/1K1N1p2/4k3/5N2/8/5P2/8

#2

5 + 2

6490 yacpdb 2020
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qxf6#
  • Tries
    • 1.Kc6?
      • 1...Kd4
        • 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#

Anticipated by 30870(1875)

This anticipates 222466(1883), 181844(1905), 262372(1998)

FEATURES

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