MESON Chess Problem Database

Problem Display
PID: 220420 (5K2/8/8/4k3/3NpN2/2R3R1/8/8 w - - 0 1)

Krivenko, Valery Aleksinovich

Suomen Shakki, 1986

5K2/8/8/4k3/3NpN2/2R3R1/8/8

#2

5 + 2

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Rc5+?
      • 1...Kxd4
        • 2.Se6#
      • 1...Kxf4
        • 2.Se2#
      • 1...Kf6
        • 2.Sh5#
        • 2.Rg6#
        • 2.Rf5#
      • 1...Kd6!
  • Keys
    • 1.Rg5+!
      • 1...Kxd4
        • 2.Se2#
      • 1...Kxf4
        • 2.Se6#
      • 1...Kd6
        • 2.Rd5#
      • 1...Kf6
        • 2.Rf5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(b);S_FLIGHT,XS(C)::S(D)
        • K(b);S_FLIGHT,XS(D)::S(C)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • R(B);CHECK
    • Vars
      • K(b);S_FLIGHT,XS(C)::S(D)
      • K(b);S_FLIGHT,XS(D)::S(C)
      • K(b);OGATE,S_FLIGHT::R1(B)
      • K(b);S_FLIGHT::R1(B)
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