MESON Chess Problem Database

Problem Display
PID: 32291 (8/4p3/4p1P1/Q1p1k2K/B1P5/6N1/8/4B3 w - - 0 1)

Gold, Samuel

The Westminster Papers, 1875

8/4p3/4p1P1/Q1p1k2K/B1P5/6N1/8/4B3

#2

7 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qc3#
  • Tries
    • 1.Kg5?
      • threat
        • 2.Qxc5#
      • 1...Kd4
        • 2.Qc3#
      • 1...Kd6!
    • 1.Bc3+?
      • 1...Kd6
        • 2.Se4#
        • 2.Qb6#
        • 2.Qd8#
      • 1...Kf4!
    • 1.Qc3+?
      • 1...Kf4
        • 2.Bd2#
      • 1...Kd6!
    • 1.Qd8?
      • 1...Kf6
        • 2.Qh8#
      • 1...Kf4!
  • Keys
    • 1.Qa8!
      • 1...Kd4
        • 2.Qe4#
      • 1...Kf4
        • 2.Qe4#
      • 1...Kd6
        • 2.Qb8#
      • 1...Kf6
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINP(a),S_FLIGHT::QAB1(E)
  • Tries
    • Try
      • K(F);P-FLIGHT
      • Threat
        • QAR2(E),XP(a)
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::QAB1(E)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • B(A);CHECK
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • Q(E);CHECK,N_PINP(a)
      • Vars
        • K(b);S_FLIGHT::B(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(E);N_PINP(a)
      • Vars
        • K(b);P_SPINP(d),S_FLIGHT::QAB(E)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(E);N_PINP(a)
    • Vars
      • K(b);S_FLIGHT::QAR1(E)
      • K(b);S_FLIGHT::QAB(E)
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