MESON Chess Problem Database

Problem Display
PID: 180360 (3kNb2/8/1p1N1P2/1K1R4/8/6BB/8/8 w - - 0 1)

Lider, Valentin Viktorovich

Shakhmaty v SSSR, 1971

3kNb2/8/1p1N1P2/1K1R4/8/6BB/8/8

#2

7 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Bh4?
      • 1...Bxd6
        • 2.f7#
      • 1...Be7
        • 2.fxe7#
      • 1...Bg7
        • 2.fxg7#
      • 1...Bh6!
    • 1.Re5?
      • threat
        • 2.Sb7#
        • 2.Sf7#
      • 1...Be7
        • 2.fxe7#
      • 1...Bxd6!
  • Keys
    • 1.f7!
      • 1...Ke7
        • 2.Bh4#
      • 1...Bxd6
        • 2.Bh4#
      • 1...Bh6
        • 2.Sc8#
      • 1...Be7
        • 2.Sb7#
      • 1...Bg7
        • 2.Sc8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(A);
      • Vars
        • B(c);N_GUARD,P_SPINB(c),XS(E)::B(A)+P(F)
        • B(c);OGATE::P(F),XB(c)
        • B(c);OGATE::B(A)+P(F),XB(c)
      • Refutation
        • B(c);
    • Try
      • R(D);
      • Threat
        • DUALS(2)
      • Vars
        • B(c);OGATE::P(F),XB(c)
      • Refutation
        • B(c);XS(E)
  • Actual
    • P(F);
    • Vars
      • K(b);S_FLIGHT::B(A)
      • B(c);N_GUARD,P_SPINB(c),XS(E)::B(A)
      • B(c);N_GUARD::R(D)+S(E)
      • B(c);SBLOCK::R(D)+S(E),DCHECK
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