MESON Chess Problem Database

Problem Display
PID: 4790 (8/8/8/4pp2/4k3/8/3QK3/8 w - - 0 1)

Locock, Charles Dealtry

Knowledge, 1891

8/8/8/4pp2/4k3/8/3QK3/8

#2

2 + 3

5454 Near Snap 2009
5454 Near Snap 2020
3713 Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...f4
      • 2.Qd3#
  • Tries
    • 1.Qd1?
      • 1...f4
        • 2.Qd3#
      • 1...Kf4!
    • 1.Qd6?
      • 1...f4
        • 2.Qd3#
      • 1...Kf4!
    • 1.Qd7?
      • 1...f4
        • 2.Qd3#
      • 1...Kf4!
  • Keys
    • 1.Qd8!
      • 1...Kf4
        • 2.Qh4#
      • 1...f4
        • 2.Qd3#

Anticipated by 2562(0000), 23602(1879), 91942(1883)

This anticipates 135915(1897), 206689(1925), 231572(1927), 231573(1927), 90303(1930)

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::QAB1(A)
  • Tries
    • Try
      • Q(A);
      • Vars
        • P(c);SBLOCK::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • P(c);SBLOCK::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
    • Try
      • Q(A);
      • Vars
        • P(c);SBLOCK::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);P-FLIGHT::QAR2(A)
      • P(c);SBLOCK::QAB1(A)
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