MESON Chess Problem Database

Problem Display
PID: 77263 (k1K5/Pr6/1P6/3N4/8/8/2R5/8 w - - 0 1)

Abramenko, Sergey Petrovich

Sovietskaya Chuvashiya, 1992

k1K5/Pr6/1P6/3N4/8/8/2R5/8

#2

5 + 2

5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rc7+
      • 2.Sxc7#
    • 1...Rb8+
      • 2.axb8Q#
      • 2.axb8R#
  • Keys
    • 1.Rc7!
      • 1...Rxc7+
        • 2.Sxc7#
      • 1...Rb8+
        • 2.axb8Q#
        • 2.axb8R#
      • 1...Rxb6
        • 2.Sxb6#
      • 1...Rxa7
        • 2.Rxa7#

This anticipates 138787(2010)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(a);CHECK,N_GUARD::S(B),XR(a)
    • R(a);CHECK,OGATE::PXR(a)=Q
  • Actual
    • R(A);
    • Vars
      • R(a);CHECK,XR(A)::S(B),XR(a)
      • R(a);CHECK,OGATE::PXR(a)=Q
      • R(a);XP(C)::S(B),XR(a)
      • R(a);OGATE,XP(D)::R1(A),XR(a)
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