MESON Chess Problem Database

Problem Display
PID: 264492 (4k1K1/2Q5/3n2P1/8/8/1P6/8/3B4 w - - 0 1)

Melnichenko, Viktor Oleksandrovich

The Problemist, 1992

4k1K1/2Q5/3n2P1/8/8/1P6/8/3B4

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Sf7
      • 2.gxf7#
  • Tries
    • 1.Be2?
      • 1...Se4
        • 2.Bb5#
      • 1...Sb5
        • 2.Bxb5#
      • 1...Sf5
        • 2.Bb5#
      • 1...Sb7
        • 2.Bb5#
      • 1...Sf7
        • 2.Bb5#
        • 2.gxf7#
      • 1...Sc8
        • 2.Bb5#
      • 1...Sc4!
    • 1.b4?
      • 1...Sc4
        • 2.Ba4#
      • 1...Se4
        • 2.Ba4#
      • 1...Sf5
        • 2.Ba4#
      • 1...Sb7
        • 2.Ba4#
      • 1...Sf7
        • 2.Ba4#
        • 2.gxf7#
      • 1...Sc8
        • 2.Ba4#
      • 1...Sb5!
    • 1.g7?
      • 1...Sc4
        • 2.Bh5#
      • 1...Se4
        • 2.Bh5#
      • 1...Sb5
        • 2.Bh5#
      • 1...Sf5
        • 2.Bh5#
      • 1...Sb7
        • 2.Bh5#
      • 1...Sc8
        • 2.Bh5#
      • 1...Sf7!
  • Keys
    • 1.Bh5!
      • 1...Sc4
        • 2.g7#
      • 1...Se4
        • 2.g7#
      • 1...Sb5
        • 2.g7#
      • 1...Sf5
        • 2.g7#
      • 1...Sb7
        • 2.g7#
      • 1...Sf7
        • 2.gxf7#
      • 1...Sc8
        • 2.g7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(a);OGATE::P(C),XS(a)
  • Tries
    • Try
      • B(A);
      • Vars
        • S(a);N_GUARD::B(A)
        • S(a);N_GUARD::B(A),XS(a)
      • Refutation
        • S(a);
    • Try
      • P(B);
      • Vars
        • S(a);N_GUARD::B(A)
      • Refutation
        • S(a);
    • Try
      • P(C);
      • Vars
        • S(a);N_GUARD::B(A)
      • Refutation
        • S(a);
  • Actual
    • B(A);
    • Vars
      • S(a);N_GUARD::B(A)+P(C)
      • S(a);OGATE::P(C),XS(a)
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