MESON Chess Problem Database

Problem Display
PID: 247319 (8/8/8/6K1/7Q/3B1N2/6k1/8 w - - 0 1)

Stubbs, Charles Francis

Source?, 0000

8/8/8/6K1/7Q/3B1N2/6k1/8

#2

4 + 1

14986 White-Hume Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Bf1+?
      • 1...Kxf3
        • 2.Qf4#
      • 1...Kxf1!
    • 1.Qf2+?
      • 1...Kh1
        • 2.Qg1#
        • 2.Qf1#
        • 2.Qh2#
      • 1...Kh3
        • 2.Sg1#
        • 2.Bf1#
        • 2.Bf5#
        • 2.Qh2#
      • 1...Kxf2!
    • 1.Qg3+?
      • 1...Kh1
        • 2.Qh2#
        • 2.Qg1#
        • 2.Qh3#
      • 1...Kxg3!
    • 1.Qf4?
      • 1...Kh1
        • 2.Qh2#
      • 1...Kh3
        • 2.Bf1#
        • 2.Qh2#
        • 2.Qg4#
      • 1...Kf2!
    • 1.Qg4+?
      • 1...Kh1
        • 2.Qh3#
        • 2.Qg1#
      • 1...Kf2!
  • Keys
    • 1.Qe1!
      • 1...Kxf3
        • 2.Be4#
      • 1...Kh3
        • 2.Bf1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(A);CHECK
      • Vars
        • K(a);S_FLIGHT,XS(B)::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT,XB(A)
    • Try
      • Q(C);CHECK
      • Refutation
        • K(a);P-FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Refutation
        • K(a);P-FLIGHT,XQ(C)
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(a);OGATEB,S_FLIGHT,XS(B)::B(A)
      • K(a);S_FLIGHT::B(A)
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