MESON Chess Problem Database

Problem Display
PID: 17120 (4RbRQ/4P1P1/8/1NK2k2/8/8/8/5N2 w - - 0 1)

Shinkman, William Anthony

Jamaica Gleaner, 1885

4RbRQ/4P1P1/8/1NK2k2/8/8/8/5N2

#2

8 + 2

3925 The Golden Argosy 1929

SOLUTION

  • SOUND
  • Sets
    • 1...Kg4
      • 2.gxf8Q#
      • 2.gxf8R#
    • 1...Ke5
      • 2.exf8Q#
      • 2.exf8R#
    • 1...Kg5
      • 2.gxf8Q#
      • 2.gxf8R#
    • 1...Kg6
      • 2.gxf8Q#
      • 2.gxf8R#
  • Tries
    • 1.gxf8Q+?
      • 1...Ke4
        • 2.Qd4#
      • 1...Ke6!
    • 1.gxf8R+?
      • 1...Ke4
        • 2.Qd4#
      • 1...Ke6!
  • Keys
    • 1.Sd6+!
      • 1...Kf4
        • 2.gxf8Q#
        • 2.gxf8R#
      • 1...Kg4
        • 2.gxf8Q#
        • 2.gxf8R#
      • 1...Ke5
        • 2.exf8Q#
        • 2.exf8R#
      • 1...Kg5
        • 2.gxf8Q#
        • 2.gxf8R#
      • 1...Ke6
        • 2.gxf8S#
      • 1...Kf6
        • 2.gxf8S#
      • 1...Kg6
        • 2.gxf8Q#
        • 2.gxf8S#
        • 2.gxf8B#
        • 2.gxf8R#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::PXB(b)=Q
    • K(a);P-FLIGHT::PXB(b)=Q
  • Tries
    • Try
      • P(E);CHECK,N_SPINP(D),XB(b)
      • Vars
        • K(a);S_FLIGHT::QAR1(H)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(E);CHECK,N_SPINP(D),XB(b)
      • Vars
        • K(a);S_FLIGHT::QAR1(H)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(B);CHECK,N_SPINP(D)
    • Vars
      • K(a);P-FLIGHT::PXB(b)=Q
      • K(a);S_FLIGHT::PXB(b)=Q
      • K(a);S_FLIGHT::PXB(b)=S
      • K(a);P-FLIGHT::PXB(b)=S
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