MESON Chess Problem Database

Problem Display
PID: 247213 (1n4Rn/8/p6p/4N2k/R3p2p/2P1r2p/4p2N/4K3 w - - 0 1)

Allison, Christopher John

The Problemist, 1954

1n4Rn/8/p6p/4N2k/R3p2p/2P1r2p/4p2N/4K3

#2

6 + 10

SOLUTION

  • SOUND
  • Keys
    • 1.Ra5!
      • threat
        • 2.Sd3#
        • 2.Sef3#
        • 2.Sc4#
        • 2.Seg4#
        • 2.Sc6#
        • 2.Sg6#
        • 2.Sd7#
        • 2.Sf7#
      • 1...Rxc3
        • 2.Sc4#
      • 1...Sg6
        • 2.Sxg6#
      • 1...Rf3
        • 2.Sexf3#
      • 1...Rd3
        • 2.Sxd3#
      • 1...Rg3
        • 2.Seg4#
      • 1...Sc6
        • 2.Sxc6#
      • 1...Sd7
        • 2.Sxd7#
      • 1...Sf7
        • 2.Sxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
  • Actual
    • R(D);
    • Threat
      • DUALS(8)
    • Vars
      • R(b);XP(C)::R(D)+S(E)
      • S(j);::R(D)+S(E),XS(j)
      • R(b);::R(D)+S(E),XR(b)
      • R(b);::R(D)+S(E)
      • S(i);::R(D)+S(E),XS(i)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).