MESON Chess Problem Database

Problem Display
PID: 180489 (8/2K5/8/2k1P1PR/4R1n1/2N1p3/4P3/8 w - - 0 1)

Lider, Valentin Viktorovich

Shakhmaty v SSSR, 1978

8/2K5/8/2k1P1PR/4R1n1/2N1p3/4P3/8

#2

7 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.e6?
      • 1...Sf2
        • 2.g6#
      • 1...Sh2
        • 2.g6#
      • 1...Sf6
        • 2.gxf6#
      • 1...Sh6
        • 2.gxh6#
      • 1...Se5!
    • 1.g6?
      • 1...Sxe5
        • 2.Rhxe5#
      • 1...Sf2
        • 2.e6#
      • 1...Sh2
        • 2.e6#
      • 1...Sf6
        • 2.exf6#
      • 1...Sh6!
  • Keys
    • 1.Rh4!
      • 1...Sxe5
        • 2.Rxe5#
      • 1...Sf2
        • 2.Rc4#
      • 1...Sh2
        • 2.Rc4#
      • 1...Sf6
        • 2.Rc4#
      • 1...Sh6
        • 2.Rc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • P(D);
      • Vars
        • S(b);N_GUARD::R(F)+P(E)
        • S(b);OGATE::R(F)+P(E),XS(b)
      • Refutation
        • S(b);
    • Try
      • P(E);
      • Vars
        • S(b);OGATE,P_SPINS(b),XP(D)::R(F),XS(b)
        • S(b);N_GUARD::R(F)+P(D)
        • S(b);OGATE::R(F)+P(D),XS(b)
      • Refutation
        • S(b);
  • Actual
    • R(F);
    • Vars
      • S(b);OGATE,XP(D)::R(C),XS(b)
      • S(b);::R1(C)
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