MESON Chess Problem Database

Problem Display
PID: 17941 (K7/8/8/krRN4/8/8/N7/1R6 w - - 0 1)

Servais, Albert

Die Schwalbe, 1952

K7/8/8/krRN4/8/8/N7/1R6

#2

5 + 2

785 Het Belgisch Schaakbord (L'Echiquier Belge) 1952
78 Bulletin Ouvrier des Echecs 1955
3295 Einfuhrung in die Welt des Schachproblem 1984
136 Problem Observer 2008

SOLUTION

  • SOUND
  • Tries
    • 1.Rbxb5+?
      • 1...Ka6
        • 2.Sab4#
        • 2.Sdb4#
        • 2.Sc7#
        • 2.Ra5#
        • 2.Rb6#
      • 1...Ka4!
    • 1.Rcxb5+?
      • 1...Ka6
        • 2.Sc7#
      • 1...Ka4!
  • Keys
    • 1.Ra1!
      • threat
        • 2.Sc1#
        • 2.Sac3#
        • 2.Sab4#
      • 1...Ka4
        • 2.Sc1#
      • 1...Ka6
        • 2.Sab4#
      • 1...Rxc5
        • 2.Sac3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(A);CHECK,XR(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(C);CHECK,XR(b)
      • Vars
        • K(a);P-FLIGHT::S(D)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • R(A);
    • Threat
      • DUALS(3)
    • Vars
      • K(a);N_SPINR(b),P-FLIGHT::R(A)+S(B)
      • K(a);N_SPINR(b),P-FLIGHT::R(A)+S(B),DCHECK
      • R(b);N_SPINR(b),XR(C)::R(A)+S(B)
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