MESON Chess Problem Database

Problem Display
PID: 154567 (8/1R6/3p4/3k4/3p4/3Q3K/8/8 w - - 0 1)

Grindley, AT

Sheffield Guardian (The), 1911

(First published on Fri May 12 1911)

8/1R6/3p4/3k4/3p4/3Q3K/8/8

#2

3 + 3

15239 Valois Notebooks 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Qb5#
    • 1...Kc6
      • 2.Qb5#
  • Tries
    • 1.Qe2?
      • 1...Kc5
        • 2.Qb5#
      • 1...Kc6
        • 2.Qb5#
      • 1...d3!
    • 1.Qf5+?
      • 1...Kc6
        • 2.Qb5#
      • 1...Kc4!
  • Keys
    • 1.Kg4!
      • 1...Kc5
        • 2.Qb5#
      • 1...Ke5
        • 2.Qf5#
      • 1...Kc6
        • 2.Qb5#
      • 1...Ke6
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINP(a),P-FLIGHT::QAR1(A)
    • K(b);N_SPINP(a),S_FLIGHT::QAB1(A)
  • Tries
    • Try
      • Q(A);N_PINP(a)
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
        • K(b);S_FLIGHT::QAB1(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);CHECK,N_PINP(a)
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • K(B);S_FLIGHT
    • Vars
      • K(b);N_SPINP(a),P-FLIGHT::QAR1(A)
      • K(b);N_SPINP(a),S_FLIGHT::QAB1(A)
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