MESON Chess Problem Database

Problem Display
PID: 224215 (6B1/8/8/5k2/8/7N/2K3P1/Q7 w - - 0 1)

Robbins, Alexander Henry

A Collection of Chess Problems (Robbins), 1887

6B1/8/8/5k2/8/7N/2K3P1/Q7

#2

5 + 1

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Qe5+?
      • 1...Kg4
        • 2.Qg5#
      • 1...Kg6
        • 2.Qg5#
      • 1...Kxe5!
    • 1.Qf6+?
      • 1...Ke4
        • 2.Qf4#
      • 1...Kg4
        • 2.Qg5#
      • 1...Kxf6!
    • 1.Qa5+?
      • 1...Kg4
        • 2.Qg5#
      • 1...Kf6
        • 2.Qg5#
      • 1...Kg6
        • 2.Qg5#
      • 1...Ke4!
  • Keys
    • 1.Qc1!
      • 1...Ke4
        • 2.Qf4#
      • 1...Kg4
        • 2.Qg5#
      • 1...Ke5
        • 2.Qf4#
      • 1...Kf6
        • 2.Qg5#
      • 1...Kg6
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(A)
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(A)
        • K(a);OGATE,P-FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::QAR1(A)
      • K(a);P-FLIGHT::QAB1(A)
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