MESON Chess Problem Database

Problem Display
PID: 180047 (8/8/KPB1kPRQ/8/8/8/8/8 w - - 0 1)

Lincoln, Robert A

Problem Observer, 2012

8/8/KPB1kPRQ/8/8/8/8/8

#2

6 + 1

SOLUTION

  • SOUND
  • Tries
    • 1.Qg5?
      • threat
        • 2.Qd5#
      • 1...Kd6
        • 2.Qd5#
        • 2.f7#
      • 1...Kf7!
    • 1.Qh5?
      • threat
        • 2.Qd5#
      • 1...Kd6
        • 2.Qd5#
      • 1...Kf7!
    • 1.f7+?
      • 1...Kf5
        • 2.Qg5#
      • 1...Ke7
        • 2.f8Q#
      • 1...Kxf7
        • 2.Qg7#
      • 1...Ke5!
  • Keys
    • 1.Qe3+!
      • 1...Kf5
        • 2.Qe4#
      • 1...Kd6
        • 2.f7#
      • 1...Kf7
        • 2.Qe8#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(F);
      • Threat
        • QAB1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);
      • Threat
        • QAB1(F)
      • Vars
        • K(a);P-FLIGHT::QAR1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(D);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(F)
        • K(a);P-FLIGHT::P=Q
        • K(a);S_FLIGHT,XP(D)::QAR1(F)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(F);CHECK
    • Vars
      • K(a);S_FLIGHT::QAB1(F)
      • K(a);P-FLIGHT::R(E)+P(D)
      • K(a);OGATE,S_FLIGHT::QAB1(F)
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