MESON Chess Problem Database

Problem Display
PID: 20930 (3Q4/2RPNNPR/4k3/6P1/6Kn/b7/b7/8 w - - 0 1)

Albert, Bernard

Good Companions (December), 1914

3Q4/2RPNNPR/4k3/6P1/6Kn/b7/b7/8

#2

9 + 4

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf7
      • 2.g8Q#
      • 2.g8B#
  • Tries
    • 1.Rc6+?
      • 1...Kxf7
        • 2.Rf6#
        • 2.Qe8#
        • 2.Qf8#
        • 2.g8Q#
        • 2.g8S#
        • 2.g8B#
        • 2.g8R#
      • 1...Bd6!
    • 1.Rh6+?
      • 1...Kxf7
        • 2.Qf8#
        • 2.g8Q#
      • 1...Sg6!
    • 1.Qb8?
      • threat
        • 2.d8S#
      • 1...Kxe7
        • 2.Qe8#
      • 1...Kxf7
        • 2.g8Q#
        • 2.g8B#
      • 1...Bxe7!
    • 1.Qc8?
      • threat
        • 2.d8S#
      • 1...Kxe7
        • 2.Qe8#
        • 2.d8Q#
        • 2.d8R#
      • 1...Kxf7
        • 2.g8Q#
        • 2.g8B#
      • 1...Bxe7!
    • 1.Qg8?
      • threat
        • 2.d8S#
      • 1...Kxe7
        • 2.Qe8#
        • 2.d8S#
      • 1...Bxe7!
    • 1.Qh8?
      • threat
        • 2.d8S#
      • 1...Kxe7
        • 2.Qe8#
        • 2.d8S#
      • 1...Kxf7
        • 2.d8S#
        • 2.g8Q#
      • 1...Bxe7!
  • Keys
    • 1.Qa8!
      • threat
        • 2.d8S#
      • 1...Kxe7
        • 2.Qe8#
      • 1...Kxf7
        • 2.g8Q#
        • 2.g8B#
      • 1...Bxe7
        • 2.Qxa2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(d);S_FLIGHT,XS(F)::P=Q
  • Tries
    • Try
      • R(C);CHECK
      • Refutation
        • B(b);P_SPINB(b)
    • Try
      • R(H);CHECK
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • Q(I);
      • Threat
        • P=S
      • Vars
        • K(d);OGATEB,P-FLIGHT,XS(E)::QAR1(I)
        • K(d);S_FLIGHT,XS(F)::P=Q
      • Refutation
        • B(b);XS(E)
    • Try
      • Q(I);
      • Threat
        • P=S
      • Vars
        • K(d);S_FLIGHT,XS(F)::P=Q
      • Refutation
        • B(b);XS(E)
    • Try
      • Q(I);
      • Threat
        • P=S
      • Refutation
        • B(b);XS(E)
    • Try
      • Q(I);
      • Threat
        • P=S
      • Refutation
        • B(b);XS(E)
  • Actual
    • Q(I);
    • Threat
      • P=S
    • Vars
      • K(d);OGATEB,P-FLIGHT,XS(E)::QAR1(I)
      • K(d);S_FLIGHT,XS(F)::P=Q
      • B(b);OGATE,SBLOCK,XS(E)::QAB(I),XB(a)
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