MESON Chess Problem Database

Problem Display
PID: 7255 (k1B5/2p5/2N5/4p3/5p2/5p2/5KpQ/6Rr w - - 0 1)

van Woerden, Jan

Het Belgisch Schaakbord (L'Echiquier Belge), 1999

k1B5/2p5/2N5/4p3/5p2/5p2/5KpQ/6Rr

#2

5 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rxh2
      • 2.Ra1#
  • Tries
    • 1.Qh5?
      • 1...Rxh5
        • 2.Ra1#
      • 1...e4
        • 2.Qa5#
      • 1...Rh2
        • 2.Ra1#
      • 1...Rh3
        • 2.Ra1#
      • 1...Rh4
        • 2.Ra1#
      • 1...Rxg1!
  • Keys
    • 1.Qh8!
      • 1...Rxg1
        • 2.Ba6#
      • 1...Rxh8
        • 2.Ra1#
      • 1...e4
        • 2.Qa1#
      • 1...Rh2
        • 2.Ra1#
      • 1...Rh3
        • 2.Ra1#
      • 1...Rh4
        • 2.Ra1#
      • 1...Rh5
        • 2.Ra1#
      • 1...Rh6
        • 2.Ra1#
      • 1...Rh7
        • 2.Ra1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • R(a);N_GUARD,XQ(C)::R(A)
  • Tries
    • Try
      • Q(C);
      • Vars
        • R(a);N_GUARD,XQ(C)::R(A)
        • P(e);OGATE::QAR(C)
        • R(a);N_GUARD::R(A)
      • Refutation
        • R(a);XR(A)
  • Actual
    • Q(C);
    • Vars
      • R(a);N_GUARD,XR(A)::QAR(C)+B(E)
      • R(a);N_GUARD,SBLOCK,XQ(C)::R(A)
      • P(e);OGATE::QAB(C)
      • R(a);N_GUARD::R(A)
HTML5 logo

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).