MESON Chess Problem Database

Problem Display
PID: 51504 (1Q6/8/3N3P/2N1k3/4P2K/4R3/8/7B w - - 0 1)

Massingham, HW

The Guardian, 1962

1Q6/8/3N3P/2N1k3/4P2K/4R3/8/7B

#2

8 + 1

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Sc4#
      • 2.Sf5#
  • Tries
    • 1.Sd7+?
      • 1...Kd4
        • 2.Qa7#
        • 2.Qb6#
      • 1...Kf4
        • 2.Sc4#
        • 2.Sf5#
        • 2.Rf3#
      • 1...Ke6!
    • 1.Rc3?
      • 1...Kd4
        • 2.Sb5#
        • 2.Qh8#
      • 1...Kf4
        • 2.Sc4#
        • 2.Sb5#
        • 2.Sf5#
        • 2.Sdb7#
        • 2.Sf7#
        • 2.Sc8#
        • 2.Se8#
      • 1...Kf6!
    • 1.Rd3?
      • threat
        • 2.Se8#
      • 1...Kf4
        • 2.Sc4#
        • 2.Sb5#
        • 2.Sf5#
        • 2.Sdb7#
        • 2.Sf7#
        • 2.Sc8#
        • 2.Se8#
      • 1...Kf6!
    • 1.Qc7?
      • 1...Kf4
        • 2.Sc4#
        • 2.Sf5#
      • 1...Kf6
        • 2.Qg7#
      • 1...Kd4!
    • 1.Qb2+?
      • 1...Kf4
        • 2.Rf3#
      • 1...Kxd6!
    • 1.Qb6?
      • 1...Kd4
        • 2.Sd7#
      • 1...Kf4
        • 2.Sd3#
      • 1...Kf6!
    • 1.Qd8?
      • 1...Kf4
        • 2.Qg5#
      • 1...Kd4!
    • 1.Qh8+?
      • 1...Kf4
        • 2.Rf3#
      • 1...Kxd6!
  • Keys
    • 1.Qa7!
      • 1...Kd4
        • 2.Sd7#
      • 1...Kf4
        • 2.Sd3#
      • 1...Kxd6
        • 2.e5#
      • 1...Kf6
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(B);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(B);
      • Threat
        • QAB(H)+S(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(H);
      • Vars
        • K(a);S_FLIGHT::QAB1(H)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(H);CHECK
      • Vars
        • K(a);S_FLIGHT::R1(B)
      • Refutation
        • K(a);S_FLIGHT,XS(F)
    • Try
      • Q(H);
      • Vars
        • K(a);S_FLIGHT::QAB(H)+S(E)
        • K(a);S_FLIGHT::S(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(H);
      • Vars
        • K(a);S_FLIGHT::QAB1(H)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(H);CHECK
      • Vars
        • K(a);S_FLIGHT::R1(B)
      • Refutation
        • K(a);S_FLIGHT,XS(F)
  • Actual
    • Q(H);
    • Vars
      • K(a);S_FLIGHT::QAB(H)+S(E)
      • K(a);S_FLIGHT::S(E)
      • K(a);OGATE,S_FLIGHT,XS(F)::P(C)
      • K(a);S_FLIGHT::QAB1(H)
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