MESON Chess Problem Database

Problem Display
PID: 57135 (2K5/p1nQ4/r4b2/3Np1np/4k1qR/2Pp1bP1/4r3/5N2 w - - 0 1)

Ellerman, Arnoldo

1st Prize, Brisbane Courier, 1917

2K5/p1nQ4/r4b2/3Np1np/4k1qR/2Pp1bP1/4r3/5N2

#2

7 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.Sd2#
    • 1...Rd2
      • 2.Sxd2#
    • 1...Re3
      • 2.Sd2#
    • 1...Ra1
      • 2.Sxf6#
    • 1...Ra2
      • 2.Sxf6#
    • 1...Ra3
      • 2.Sxf6#
    • 1...Ra4
      • 2.Sxf6#
    • 1...Ra5
      • 2.Sxf6#
  • Keys
    • 1.Sde3!
      • threat
        • 2.Qf5#
      • 1...Rxe3
        • 2.Sd2#
      • 1...Re6
        • 2.Qa4#
      • 1...Sge6
        • 2.Qh7#
      • 1...Sce6
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • R(a);N_GUARD::S(A)
    • R(a);N_GUARD::S(A),XR(a)
    • R(i);N_GUARD::S(E),XB(j)
  • Actual
    • S(E);
    • Threat
      • QAB1(F)
    • Vars
      • R(a);N_GUARD,SBLOCK,XS(E)::S(A)
      • R(i);N_PINQ(F)::QAR(F)
      • S(g);N_PINQ(F)::QAB(F)
      • S(l);N_PINQ(F)::QAB1(F)
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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).