MESON Chess Problem Database

Problem Display
PID: 179774 (k7/3R4/2n1P3/1R1N4/8/8/K7/7B w - - 0 1)

Jada, Faud Emile

Probleemblad, 1979

k7/3R4/2n1P3/1R1N4/8/8/K7/7B

#2

6 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4+
      • 2.Sxb4#
    • 1...Sa7
      • 2.Sc7#
    • 1...Se7
      • 2.Sxe7#
    • 1...Sb8
      • 2.Sb6#
  • Tries
    • 1.Rb8+?
      • 1...Sxb8
        • 2.Sb6#
      • 1...Kxb8!
    • 1.Ra7+?
      • 1...Sxa7
        • 2.Sc7#
      • 1...Kxa7!
  • Keys
    • 1.e7!
      • 1...Sb4+
        • 2.Sxb4#
      • 1...Sxe7
        • 2.Sxe7#
      • 1...Sd4
        • 2.e8Q#
        • 2.e8R#
      • 1...Sa5
        • 2.e8Q#
        • 2.e8R#
      • 1...Se5
        • 2.e8Q#
        • 2.e8R#
      • 1...Sa7
        • 2.Sc7#
      • 1...Sb8
        • 2.Sb6#
      • 1...Sd8
        • 2.exd8Q#
        • 2.exd8R#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(a);CHECK::B(A)+S(D),XS(a)
    • S(a);SBLOCK::B(A)+S(D),DCHECK
    • S(a);::B(A)+S(D),XS(a)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • S(a);SBLOCK,XR(C)::B(A)+S(D),DCHECK
      • Refutation
        • K(b);P-FLIGHT,XR(C)
    • Try
      • R(F);CHECK
      • Vars
        • S(a);SBLOCK,XR(F)::B(A)+S(D),DCHECK
      • Refutation
        • K(b);P-FLIGHT,XR(F)
  • Actual
    • P(E);
    • Vars
      • S(a);CHECK::B(A)+S(D),XS(a)
      • S(a);XP(E)::B(A)+S(D),XS(a)
      • S(a);N_GUARD::P=Q
      • S(a);SBLOCK::B(A)+S(D),DCHECK
      • S(a);OGATE::PXS(a)=Q
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