MESON Chess Problem Database

Problem Display
PID: 7579 (4K1k1/4prPR/7R/8/8/8/8/8 w - - 0 1)

Melnichenko, Viktor Oleksandrovich

1/3 Prize, Smena, 1992

4K1k1/4prPR/7R/8/8/8/8/8

#2

4 + 3

3681 FIDE Album (1992-1994) 2001
133 The Problemist Supplement 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxg7
      • 2.Rh8#
    • 1...Rf8+
      • 2.gxf8Q#
      • 2.gxf8R#
  • Keys
    • 1.Rg6!
      • threat
        • 2.Rh8#
      • 1...Rf8+
        • 2.gxf8S#
      • 1...Kxh7
        • 2.g8Q#
      • 1...Rxg7
        • 2.Rgxg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(b);SBLOCK,XP(B)::R1(C)
    • R(b);CHECK,OGATE::PXR(b)=Q
  • Actual
    • R(A);
    • Threat
      • R1(C)
    • Vars
      • R(b);CHECK,OGATE::PXR(b)=S
      • K(c);OGATE,S_FLIGHT,XR(C)::P=Q
      • R(b);OGATE,P_SPINR(b),XP(B)::R1(A),XR(b)
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