MESON Chess Problem Database

Problem Display
PID: 91401 (8/8/4R3/8/8/1n1B4/4NK2/3k1N2 w - - 0 1)

Ivanov, E

Probleemblad, 1959

8/8/4R3/8/8/1n1B4/4NK2/3k1N2

#2

5 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Sc3#
    • 1...Sd2
      • 2.Se3#
  • Tries
    • 1.Ra6?
      • 1...Sa1
        • 2.Rxa1#
      • 1...Sc1
        • 2.Sc3#
      • 1...Sd2
        • 2.Se3#
      • 1...Sd4
        • 2.Ra1#
      • 1...Sc5
        • 2.Ra1#
      • 1...Sa5!
    • 1.Rc6?
      • threat
        • 2.Bc2#
      • 1...Sa1
        • 2.Rc1#
      • 1...Sd4
        • 2.Rc1#
      • 1...Sc5!
  • Keys
    • 1.Rb6!
      • 1...Sa1
        • 2.Rb1#
      • 1...Sc1
        • 2.Sc3#
      • 1...Sd2
        • 2.Se3#
      • 1...Sd4
        • 2.Rb1#
      • 1...Sa5
        • 2.Rb1#
      • 1...Sc5
        • 2.Rb1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(b);SBLOCK::S(B)
    • S(b);SBLOCK::S(A)
  • Tries
    • Try
      • R(E);
      • Vars
        • S(b);N_GUARD::R(E),XS(b)
        • S(b);SBLOCK::S(B)
        • S(b);SBLOCK::S(A)
        • S(b);N_GUARD::R(E)
      • Refutation
        • S(b);
    • Try
      • R(E);
      • Threat
        • B(D)
      • Vars
        • S(b);N_GUARD::R1(E)
      • Refutation
        • S(b);
  • Actual
    • R(E);
    • Vars
      • S(b);OGATE::R(E)
      • S(b);SBLOCK::S(B)
      • S(b);SBLOCK::S(A)
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