MESON Chess Problem Database

Problem Display
PID: 168228 (4kN2/1N4K1/1Rn2P2/8/8/8/8/8 w - - 0 1)

Petite, Efren

Problemist Pribuzhya, 1990

4kN2/1N4K1/1Rn2P2/8/8/8/8/8

#2

5 + 2

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4
      • 2.Re6#
    • 1...Sa5
      • 2.Re6#
    • 1...Se5
      • 2.Re6#
    • 1...Sa7
      • 2.Re6#
    • 1...Se7
      • 2.f7#
    • 1...Sb8
      • 2.Re6#
    • 1...Sd8
      • 2.Sd6#
  • Tries
    • 1.Rb5?
      • 1...Sa7
        • 2.Re5#
      • 1...Sb4
        • 2.Re5#
      • 1...Sa5
        • 2.Re5#
      • 1...Se5
        • 2.Rxe5#
      • 1...Se7
        • 2.f7#
      • 1...Sb8
        • 2.Re5#
      • 1...Sd8
        • 2.Sd6#
      • 1...Sd4!
  • Keys
    • 1.Ra6!
      • 1...Sd4
        • 2.Ra8#
      • 1...Sb4
        • 2.Re6#
        • 2.Ra8#
      • 1...Sa5
        • 2.Re6#
        • 2.Ra8#
      • 1...Se5
        • 2.Re6#
        • 2.Ra8#
      • 1...Sa7
        • 2.Re6#
      • 1...Se7
        • 2.f7#
      • 1...Sb8
        • 2.Re6#
      • 1...Sd8
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • S(a);OGATE::R(A)
    • S(a);SBLOCK::P(B)
    • S(a);SBLOCK::S(C)
  • Tries
    • Try
      • R(A);
      • Vars
        • S(a);N_GUARD::R(A)
        • S(a);N_GUARD::R(A),XS(a)
        • S(a);SBLOCK::P(B)
        • S(a);SBLOCK::S(C)
      • Refutation
        • S(a);
  • Actual
    • R(A);
    • Vars
      • S(a);N_GUARD::R(A)
      • S(a);OGATE::R(A)
      • S(a);SBLOCK::P(B)
      • S(a);SBLOCK::S(C)
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