MESON Chess Problem Database

Problem Display
PID: 76611 (7Q/3p4/8/4nBk1/3N4/8/6nP/5R1K w - - 0 1)

MacBride, Robert C

Chess Amateur (The), 1911

7Q/3p4/8/4nBk1/3N4/8/6nP/5R1K

#2

6 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Se1
      • 2.h4#
    • 1...Se3
      • 2.h4#
    • 1...Sf4
      • 2.h4#
    • 1...d5
      • 2.Se6#
    • 1...d6
      • 2.Se6#
  • Keys
    • 1.Rf4!
      • 1...Kxf4
        • 2.Qh6#
      • 1...Sxf4
        • 2.h4#
      • 1...Se3
        • 2.Qh4#
      • 1...Se1
        • 2.Qh4#
      • 1...Sh4
        • 2.Qxh4#
      • 1...Sd3
        • 2.Rg4#
      • 1...Sf3
        • 2.Rg4#
      • 1...Sc4
        • 2.Rg4#
      • 1...Sg4
        • 2.Rxg4#
      • 1...Sc6
        • 2.Rg4#
      • 1...Sg6
        • 2.Rg4#
      • 1...Sf7
        • 2.Rg4#
      • 1...d5
        • 2.Se6#
      • 1...d6
        • 2.Se6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::P(C)
    • P(d);N_GUARD::S(D)
  • Actual
    • R(A);
    • Vars
      • K(c);S_FLIGHT,XR(A)::QAB(F)
      • S(a);N_GUARD,SBLOCK,XR(A)::P(C)
      • S(a);N_GUARD::QAB1(F)
      • S(a);N_GUARD::QAB1(F),XS(a)
      • S(b);N_GUARD::R1(A)
      • S(b);N_GUARD::R1(A),XS(b)
      • P(d);N_GUARD::S(D)
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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).