MESON Chess Problem Database

Problem Display
PID: 135206 (3Q4/8/p3p3/3Nk1P1/8/6K1/8/7B w - - 0 1)

Fothergill, Percival Guy Laugham (PGLF)

The Field, 1914

(First published on Sat Dec 5 1914)

3Q4/8/p3p3/3Nk1P1/8/6K1/8/7B

#2

5 + 3

5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Qf6#
    • 1...exd5
      • 2.Qf6#
      • 2.Qxd5#
  • Tries
    • 1.Sc3?
      • 1...Kf5
        • 2.Qf6#
      • 1...a5!
    • 1.Sb4?
      • 1...Kf5
        • 2.Qf6#
      • 1...a5!
    • 1.Sf4?
      • 1...Kf5
        • 2.Qf6#
      • 1...a5!
    • 1.Sb6?
      • 1...Kf5
        • 2.Qf6#
      • 1...a5!
    • 1.Sc7?
      • 1...Kf5
        • 2.Qf6#
      • 1...a5!
    • 1.Qc7+?
      • 1...Kd4
        • 2.Qc3#
      • 1...Kf5!
    • 1.Qf8?
      • threat
        • 2.Qf4#
      • 1...exd5
        • 2.Qf6#
      • 1...Kd4!
    • 1.Qh8+?
      • 1...Kf5
        • 2.Qf6#
      • 1...Kd6!
  • Keys
    • 1.Qa5!
      • 1...Kd4
        • 2.Qc3#
      • 1...Kf5
        • 2.Se7#
      • 1...Kd6
        • 2.Qc7#
      • 1...exd5
        • 2.Qxd5#

This anticipates 178211(2005)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAR1(E)
  • Tries
    • Try
      • S(C);
      • Vars
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • P(b);
    • Try
      • S(C);
      • Vars
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • P(b);
    • Try
      • S(C);
      • Vars
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • P(b);
    • Try
      • S(C);
      • Vars
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • P(b);
    • Try
      • S(C);
      • Vars
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • P(b);
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • P(c);XS(C)::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(a);S_FLIGHT::QAB1(E)
      • K(a);P-FLIGHT::QAR(E)+S(C),DCHECK
      • P(c);OGATE,P_SPINP(c),XS(C)::QAR1(E),XP(c)
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