MESON Chess Problem Database

Problem Display
PID: 16357 (5n2/3R4/3Nkr2/5p1N/B2K1Pr1/8/8/8 w - - 0 1)

Pert, JT

Chess, 1940

5n2/3R4/3Nkr2/5p1N/B2K1Pr1/8/8/8

#2

6 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf4+
      • 2.Sxf4#
    • 1...Rh4
      • 2.Sg7#
    • 1...Rg7
      • 2.Sxg7#
    • 1...Sg6
      • 2.Sg7#
  • Tries
    • 1.Sb7?
      • threat
        • 2.Sc5#
        • 2.Sd8#
      • 1...Rxf4+
        • 2.Sxf4#
      • 1...Sxd7!
    • 1.Se8?
      • threat
        • 2.Sc7#
      • 1...Rxf4+
        • 2.Sxf4#
      • 1...Sxd7!
  • Keys
    • 1.Sc8!
      • threat
        • 2.Re7#
      • 1...Rxf4+
        • 2.Sxf4#
      • 1...Sxd7
        • 2.Bb3#
      • 1...Rg7
        • 2.Sxg7#
      • 1...Rf7
        • 2.Rd6#
      • 1...Sg6
        • 2.Sg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(a);CHECK,XP(C)::S(D),XR(a)
    • R(a);N_GUARD::S(D)
    • R(a);N_GUARD,N_PINP(C)::S(D),XR(a)
    • S(e);S_CUTR(a)::S(D)
  • Tries
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);CHECK,XP(C)::S(D),XR(a)
      • Refutation
        • S(e);XR(F)
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • R(a);CHECK,XP(C)::S(D),XR(a)
      • Refutation
        • S(e);XR(F)
  • Actual
    • S(E);
    • Threat
      • R1(F)
    • Vars
      • R(a);CHECK,XP(C)::S(D),XR(a)
      • S(e);SBLOCK,XR(F)::B(A)
      • R(a);N_GUARD,N_PINP(C)::S(D),XR(a)
      • R(d);SBLOCK::R1(F)
      • S(e);S_CUTR(a)::S(D)
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