MESON Chess Problem Database

Problem Display
PID: 221823 (5B2/3B1p2/p2p3p/4k2p/8/4K3/1P6/6Q1 w - - 0 1)

Birdsall, JA

Leeds Mercury Weekly Supplement, 1882

(First published on Sat Feb 18 1882)

5B2/3B1p2/p2p3p/4k2p/8/4K3/1P6/6Q1

#2

5 + 6

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kf6
      • 2.Qg7#
  • Tries
    • 1.Qf2?
      • threat
        • 2.Qf5#
      • 1...f5
        • 2.Qxf5#
      • 1...Kd5!
    • 1.Qb1?
      • threat
        • 2.Qf5#
      • 1...Kf6
        • 2.Qf5#
      • 1...f5
        • 2.Qxf5#
      • 1...Kd5!
    • 1.Qd1?
      • threat
        • 2.Qd4#
        • 2.Qxd6#
      • 1...d5
        • 2.Qd4#
      • 1...Kf6!
    • 1.Qf1?
      • threat
        • 2.Qf5#
      • 1...f5
        • 2.Qxf5#
      • 1...Kd5!
    • 1.Qg3+?
      • 1...Kf6
        • 2.Qg7#
      • 1...Kd5!
    • 1.Qg4?
      • threat
        • 2.Qf5#
        • 2.Qd4#
      • 1...Kd5
        • 2.Qd4#
      • 1...Kf6
        • 2.Qf5#
        • 2.Qg7#
      • 1...f5
        • 2.Qxf5#
        • 2.Qd4#
      • 1...hxg4!
    • 1.Qg5+?
      • 1...f5
        • 2.Qxf5#
      • 1...hxg5!
    • 1.Qg7+?
      • 1...Kd5
        • 2.Qd4#
      • 1...f6!
  • Keys
    • 1.Kd3!
      • threat
        • 2.Qd4#
      • 1...Kf4
        • 2.Qe3#
      • 1...Kd5
        • 2.Qd4#
      • 1...Kf6
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB1(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • P(f);::QAR1(A),XP(f)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
        • P(f);::QAR1(A),XP(f)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(d);::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • P(f);::QAR1(A),XP(f)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • P(b);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • P(f);P_SPINP(f)::QAR1(A),XP(f)
      • Refutation
        • P(e);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(A)
      • Refutation
        • P(f);P_SPINP(f)
  • Actual
    • K(C);P-FLIGHT
    • Threat
      • QAB1(A)
    • Vars
      • K(a);S_FLIGHT::QAB1(A)
      • K(a);P-FLIGHT::QAR1(A)
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