MESON Chess Problem Database

Problem Display
PID: 135418 (4N1K1/r3p2p/1NpPk3/4p2P/p3Q3/7b/8/8 w - - 0 1)

Fothergill, Percival Guy Laugham (PGLF)

The Field, 1915

(First published on Sat Nov 13 1915)

4N1K1/r3p2p/1NpPk3/4p2P/p3Q3/7b/8/8

#2

6 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Bf1
      • 2.Qg4#
    • 1...Bg2
      • 2.Qg4#
    • 1...Bg4
      • 2.Qxg4#
    • 1...Bf5
      • 2.Qc4#
    • 1...h6
      • 2.Qg6#
  • Tries
    • 1.Sg7+?
      • 1...Kf6
        • 2.Qh4#
      • 1...Kxd6!
    • 1.Qf3?
      • threat
        • 2.Qxh3#
        • 2.Qf7#
      • 1...exd6
        • 2.Qf6#
      • 1...e4
        • 2.Qxe4#
      • 1...Bf1
        • 2.Qg4#
        • 2.Qf7#
      • 1...Bg2
        • 2.Qg4#
        • 2.Qf7#
      • 1...Bg4
        • 2.Qxg4#
        • 2.Qf7#
      • 1...Bf5!
    • 1.Qxh7?
      • threat
        • 2.Qg6#
        • 2.Qf7#
      • 1...e4
        • 2.Qxe4#
      • 1...Bf5
        • 2.Qf7#
      • 1...exd6!
    • 1.Qf4?
      • threat
        • 2.Qf7#
      • 1...exd6
        • 2.Qf6#
      • 1...Bf5
        • 2.Qc4#
      • 1...e4
        • 2.Sg7#
        • 2.Qxe4#
      • 1...exf4!
  • Keys
    • 1.Qh4!
      • threat
        • 2.Qxh3#
      • 1...Kf5
        • 2.Sg7#
      • 1...exd6
        • 2.Qf6#
      • 1...e4
        • 2.Qxe4#
      • 1...Bf1
        • 2.Qg4#
      • 1...Bg2
        • 2.Qg4#
      • 1...Bg4
        • 2.Qxg4#
      • 1...Bf5
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(a);N_GUARD::QAB(A)
    • B(a);N_GUARD::QAB(A),XB(a)
    • B(a);SBLOCK::QAB(A)
    • P(h);N_GUARD::QAR2(A)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(e);N_SPINP(c),P-FLIGHT::QAB(A)
      • Refutation
        • K(e);N_SPINP(c),P-FLIGHT,XP(D)
    • Try
      • Q(A);N_PINP(c)
      • Threat
        • DUALS(2)
      • Vars
        • P(g);N_GUARD,XP(D)::QAR1(A)
        • P(c);OGATEB::QAR2(A),XP(c)
      • Refutation
        • B(a);
    • Try
      • Q(A);N_PINP(c),XP(h)
      • Threat
        • DUALS(2)
      • Vars
        • P(c);OGATEB::QAR2(A),XP(c)
        • B(a);::QAB1(A)
      • Refutation
        • P(g);XP(D)
    • Try
      • Q(A);N_PINP(c)
      • Threat
        • QAB1(A)
      • Vars
        • P(g);N_GUARD,XP(D)::QAR1(A)
        • B(a);SBLOCK::QAB(A)
      • Refutation
        • P(c);XQ(A)
  • Actual
    • Q(A);N_PINP(c)
    • Threat
      • QAB(A),XB(a)
    • Vars
      • K(e);S_FLIGHT::S(E)
      • P(g);N_GUARD,XP(D)::QAR1(A)
      • P(c);OGATEB::QAR2(A),XP(c)
      • B(a);N_GUARD::QAB(A)
      • B(a);N_GUARD::QAB(A),XB(a)
      • B(a);SBLOCK::QAB(A)
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