MESON Chess Problem Database

Problem Display
PID: 266977 (k2r1B2/pp3PP1/Np5R/1P6/8/8/K1P5/7B w - - 0 1)

Davidson, C

Ling, John Francis

The Problemist, 1955

k2r1B2/pp3PP1/Np5R/1P6/8/8/K1P5/7B

#2

9 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Rb8
      • 2.Sc7#
    • 1...Re8
      • 2.fxe8Q#
      • 2.fxe8R#
    • 1...Rxf8
      • 2.gxf8Q#
      • 2.gxf8R#
  • Keys
    • 1.Rc6!
      • 1...Rxf8
        • 2.gxf8Q#
        • 2.gxf8R#
      • 1...bxa6
        • 2.Rc8#
      • 1...bxc6
        • 2.Bxc6#
      • 1...Rd2
        • 2.Rc8#
      • 1...Rd1
        • 2.Rc8#
      • 1...Rd3
        • 2.Rc8#
      • 1...Rd4
        • 2.Rc8#
      • 1...Rd5
        • 2.Rc8#
      • 1...Rd6
        • 2.Rc8#
      • 1...Rd7
        • 2.Rc8#
      • 1...Rb8
        • 2.Sc7#
      • 1...Rc8
        • 2.Rxc8#
      • 1...Re8
        • 2.fxe8Q#
        • 2.fxe8R#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • R(e);SBLOCK::S(E)
    • R(e);OGATE::PXR(e)=Q
    • R(e);OGATE,XB(I)::PXR(e)=Q
  • Actual
    • R(F);N_PINP(c)
    • Vars
      • R(e);OGATE,XB(I)::PXR(e)=Q
      • P(c);XS(E)::B(A)+R(F),DCHECK
      • P(c);OGATE,P_SPINP(c),XR(F)::B(A),XP(c)
      • R(e);N_GUARD,P_PINP(C)::R(F)
      • R(e);N_GUARD::R(F)
      • R(e);SBLOCK::S(E)
      • R(e);N_GUARD::R(F),XR(e)
      • R(e);OGATE::PXR(e)=Q
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).