MESON Chess Problem Database

Problem Display
PID: 54276 (4k2r/1R5p/6P1/8/8/8/8/5RK1 w - - 0 1)

Kamstra, Hendrik Hermanus

Tijdschrift vd NSB, 1929

4k2r/1R5p/6P1/8/8/8/8/5RK1

#2

4 + 3

785 Het Belgisch Schaakbord (L'Echiquier Belge) 1952
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Rc1?
      • threat
        • 2.Rc8#
      • 1...Kf8
        • 2.Rc8#
      • 1...Kd8!
    • 1.Rff7?
      • threat
        • 2.Rb8#
      • 1...Kd8
        • 2.Rb8#
      • 1...hxg6!
    • 1.g7?
      • threat
        • 2.gxh8Q#
        • 2.gxh8R#
      • 1...Kd8
        • 2.gxh8Q#
        • 2.gxh8R#
      • 1...Rf8
        • 2.Rxf8#
        • 2.gxf8Q#
        • 2.gxf8R#
      • 1...h5
        • 2.gxh8Q#
        • 2.gxh8R#
      • 1...h6
        • 2.gxh8Q#
        • 2.gxh8R#
      • 1...Rg8!
  • Keys
    • 1.Ra1!
      • threat
        • 2.Ra8#
      • 1...Kd8
        • 2.Ra8#
      • 1...Kf8
        • 2.Ra8#

Anticipated by 132028(1921)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(A);
      • Threat
        • R(A)
      • Vars
        • K(b);P-FLIGHT::R(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • R(A);
      • Threat
        • R(D)
      • Vars
        • K(b);P-FLIGHT::R(D)
      • Refutation
        • P(a);XP(C)
    • Try
      • P(C);
      • Threat
        • PXR(c)=Q
      • Vars
        • K(b);P-FLIGHT::PXR(c)=Q
        • P(a);::PXR(c)=Q
      • Refutation
        • R(c);P_PINP(C)
  • Actual
    • R(A);
    • Threat
      • R(A)
    • Vars
      • K(b);P-FLIGHT::R(A)
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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).