MESON Chess Problem Database

Problem Display
PID: 248620 (8/1p3Q2/1p6/4p3/3Nk1B1/7p/2N4K/n5n1 w - - 0 1)

Fothergill, Percival Guy Laugham (PGLF)

British Chess Magazine, 1932

8/1p3Q2/1p6/4p3/3Nk1B1/7p/2N4K/n5n1

#2

5 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Se2
      • 2.Qf3#
    • 1...Sf3+
      • 2.Qxf3#
    • 1...exd4
      • 2.Qf5#
  • Tries
    • 1.Bf3+?
      • 1...Sxf3+
        • 2.Qxf3#
      • 1...Kd3!
    • 1.Qg6+?
      • 1...Kf4
        • 2.Se6#
        • 2.Qf5#
      • 1...Kd5!
    • 1.Qh7+?
      • 1...Kf4
        • 2.Qf5#
      • 1...Kd5!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Se2#
        • 2.Sb3#
        • 2.Sf3#
        • 2.Sb5#
        • 2.Sf5#
        • 2.Sc6#
        • 2.Se6#
      • 1...Sf3+
        • 2.Sxf3#
      • 1...Kf4
        • 2.Se6#
      • 1...Sxc2
        • 2.Sxc2#
      • 1...exd4
        • 2.Qxd4#
      • 1...Sb3
        • 2.Sxb3#
      • 1...Se2
        • 2.Sxe2#
      • 1...b5
        • 2.Sxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD::QAB1(E)
    • S(b);CHECK,N_GUARD::QAB1(E),XS(b)
    • P(e);XS(C)::QAB1(E)
  • Tries
    • Try
      • B(D);CHECK
      • Vars
        • S(b);CHECK,OGATE,XB(D)::QAB1(E),XS(b)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(d);P-FLIGHT::QAR1(E)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • Q(E);
    • Threat
      • DUALS(7)
    • Vars
      • S(b);CHECK::QAR(E)+S(C),XS(b)
      • K(d);P-FLIGHT::QAR(E)+S(C),DCHECK
      • S(a);XS(A)::QAR(E)+S(C),XS(a)
      • P(e);OGATE,P_SPINP(e),XS(C)::QAR1(E),XP(e)
      • S(a);::QAR(E)+S(C),XS(a)
      • S(b);::QAR(E)+S(C),XS(b)
      • P(f);::QAR(E)+S(C),XP(f)
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