MESON Chess Problem Database

Problem Display
PID: 158965 (3B4/3BrPR1/3k2PR/2N1p3/1K2P3/8/8/8 w - - 0 1)

Rice, John Michael

British Chess Magazine, 2016

3B4/3BrPR1/3k2PR/2N1p3/1K2P3/8/8/8

#2

9 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf7
      • 2.gxf7#
    • 1...Re8
      • 2.fxe8S#
  • Tries
    • 1.Rgh7?
      • 1...Rxd7
        • 2.g7#
      • 1...Rxf7
        • 2.gxf7#
      • 1...Re8
        • 2.fxe8S#
      • 1...Re6!
    • 1.Rg8?
      • 1...Rxd7
        • 2.g7#
      • 1...Rxf7
        • 2.gxf7#
      • 1...Re8
        • 2.fxe8S#
      • 1...Re6!
  • Keys
    • 1.f8R!
      • 1...Rxd7
        • 2.Rf6#
      • 1...Rxg7
        • 2.Rf6#
      • 1...Re6
        • 2.Sb7#
      • 1...Rf7
        • 2.gxf7#
      • 1...Re8
        • 2.Sb7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(c);OGATE,XP(G)::R(E)+P(D),XR(c)
    • R(c);OGATE::PXR(c)=S
  • Tries
    • Try
      • R(H);
      • Vars
        • R(c);N_GUARD,XB(F)::R(E)+P(D)
        • R(c);OGATE,XP(G)::R(E)+P(D),XR(c)
        • R(c);OGATE::PXR(c)=S
      • Refutation
        • R(c);
    • Try
      • R(H);
      • Vars
        • R(c);N_GUARD,XB(F)::R(E)+P(D)
        • R(c);OGATE,XP(G)::R(E)+P(D),XR(c)
        • R(c);OGATE::PXR(c)=S
      • Refutation
        • R(c);
  • Actual
    • P(G);
    • Vars
      • R(c);N_GUARD,XB(F)::R(G)
      • R(c);N_GUARD,XR(H)::R(G)
      • R(c);::S(C)
      • R(c);OGATE::R(E)+P(D),XR(c)
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