MESON Chess Problem Database

Problem Display
PID: 186059 (4Q3/8/2p5/3k2K1/1P6/8/1N6/8 w - - 0 1)

Lincoln, Robert A

Problem Observer, 2017

4Q3/8/2p5/3k2K1/1P6/8/1N6/8

#2

4 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Kf4?
      • threat
        • 2.Qd7#
        • 2.Qe5#
      • 1...Kd4
        • 2.Qe5#
      • 1...c5
        • 2.Qd7#
      • 1...Kd6!
    • 1.Kf6?
      • threat
        • 2.Qe5#
      • 1...Kd4
        • 2.Qe5#
      • 1...Kd6
        • 2.Qd8#
      • 1...c5!
  • Keys
    • 1.Kf5!
      • threat
        • 2.Qd7#
        • 2.Qe5#
        • 2.Qd8#
      • 1...Kd4
        • 2.Qe5#
      • 1...Kd6
        • 2.Qd8#
      • 1...c5
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAB1(D)
        • P(b);::QAR2(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • K(C);S_FLIGHT
      • Threat
        • QAR1(D)
      • Vars
        • K(a);P-FLIGHT::QAB1(D)
        • K(a);P-FLIGHT::QAR2(D)
      • Refutation
        • P(b);
  • Actual
    • K(C);P-FLIGHT
    • Threat
      • DUALS(3)
    • Vars
      • K(a);P-FLIGHT::QAB1(D)
      • K(a);P-FLIGHT::QAR2(D)
      • P(b);::QAR2(D)
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