MESON Chess Problem Database

Problem Display
PID: 277106 (8/5Q2/B3p2K/4k3/8/4N3/3P4/6B1 w - - 0 1)

McShane, Luke

The Problemist, 2023

8/5Q2/B3p2K/4k3/8/4N3/3P4/6B1

#2

6 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Sc4+?
      • 1...Kd5
        • 2.Qf3#
        • 2.Qb7#
      • 1...Ke4!
    • 1.Bh2+?
      • 1...Ke4
        • 2.Qf4#
      • 1...Kd4!
    • 1.Bb7?
      • threat
        • 2.Sc4#
      • 1...Kd6
        • 2.Sc4#
      • 1...Kd4!
    • 1.Qf3?
      • threat
        • 2.Sc4#
      • 1...Kd4
        • 2.Sc4#
        • 2.Sg4#
      • 1...Kd6!
  • Keys
    • 1.Qb7!
      • 1...Kd4
        • 2.Sg4#
      • 1...Kf4
        • 2.Bh2#
      • 1...Kd6
        • 2.Sc4#
      • 1...Kf6
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(D);
      • Threat
        • S(C)
      • Vars
        • K(a);S_FLIGHT::S(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);
      • Threat
        • S(C)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(F);
    • Vars
      • K(a);N_GUARD,S_FLIGHT::B(A)+S(C)
      • K(a);N_GUARD,S_FLIGHT::B(A)
      • K(a);N_GUARD,S_FLIGHT::S(C)
      • K(a);N_GUARD,S_FLIGHT::QAB1(F)
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