MESON Chess Problem Database

Problem Display
PID: 231004 (8/2Q5/7B/2K3p1/4k3/8/R5P1/8 w - - 0 1)

Briggs, A

Preston Guardian, 1883

(First published on Wed Apr 18 1883)

8/2Q5/7B/2K3p1/4k3/8/R5P1/8

#2

5 + 2

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Kc4?
      • 1...Ke3
        • 2.Qe5#
      • 1...g4
        • 2.Qf4#
      • 1...Kf5!
    • 1.Ra3?
      • 1...g4
        • 2.Qf4#
      • 1...Kf5!
    • 1.Qe5+?
      • 1...Kd3
        • 2.Qd4#
      • 1...Kxe5!
    • 1.Qd6?
      • 1...Ke3
        • 2.Qd4#
      • 1...g4
        • 2.Qd5#
      • 1...Kf5!
  • Keys
    • 1.Qf7!
      • 1...Kd3
        • 2.Qf3#
      • 1...Ke3
        • 2.Qf3#
      • 1...Ke5
        • 2.Re2#
      • 1...g4
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT,P_SPINP(b)::QAR2(E)
        • P(b);N_GUARD::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(A);
      • Vars
        • P(b);N_GUARD::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(E)
      • Refutation
        • K(a);P-FLIGHT,XQ(E)
    • Try
      • Q(E);
      • Vars
        • K(a);P-FLIGHT,P_SPINP(b)::QAB1(E)
        • P(b);::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(a);S_FLIGHT::QAR2(E)
      • K(a);P-FLIGHT,P_SPINP(b)::QAR1(E)
      • K(a);P-FLIGHT::R(A)
      • P(b);::QAB1(E)
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