MESON Chess Problem Database

Problem Display
PID: 169014 (4B3/8/8/8/Nk6/4K2Q/P7/8 w - - 0 1)

Lincoln, Robert A

SuperProblem, 2017

4B3/8/8/8/Nk6/4K2Q/P7/8

#2

5 + 1

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Ke4?
      • threat
        • 2.Qc3#
      • 1...Kc4
        • 2.Qb3#
        • 2.Qc3#
      • 1...Ka5!
    • 1.Qf1?
      • 1...Ka5
        • 2.Qb5#
      • 1...Ka3!
    • 1.Qg2?
      • 1...Ka3
        • 2.Qb2#
      • 1...Kc4
        • 2.Qe4#
      • 1...Ka5!
    • 1.Qf5?
      • threat
        • 2.Qc5#
      • 1...Kc4
        • 2.Qe4#
        • 2.Qb5#
        • 2.Qc5#
      • 1...Ka3!
    • 1.Qd7?
      • 1...Kc4
        • 2.Qb5#
        • 2.Qd4#
      • 1...Ka5
        • 2.Qb5#
      • 1...Ka3!
    • 1.Qh5?
      • threat
        • 2.Qc5#
      • 1...Kc4
        • 2.Qb5#
        • 2.Qc5#
      • 1...Ka3!
    • 1.Qh8?
      • threat
        • 2.Qc3#
      • 1...Ka3
        • 2.Qb2#
      • 1...Kc4
        • 2.Qd4#
      • 1...Ka5!
  • Keys
    • 1.Qe6!
      • 1...Ka3
        • 2.Qb3#
      • 1...Ka5
        • 2.Qb6#

This is a version of 234653

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Threat
        • QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT::QAB1(C)
        • K(a);P-FLIGHT::QAR2(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • K(a);S_FLIGHT::QAB1(C)
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(a);S_FLIGHT::QAR1(C)
      • K(a);S_FLIGHT::QAB1(C)
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