MESON Chess Problem Database

Problem Display
PID: 9309 (3K4/8/3kN3/2pPp3/2P1P3/3N4/8/3q4 w - - 0 1)

de Boer, Gerke Luiten

Sissa, 1872

3K4/8/3kN3/2pPp3/2P1P3/3N4/8/3q4

#2

6 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Sc7?
      • threat
        • 2.Sb5#
        • 2.Se8#
      • 1...Qb3
        • 2.Se8#
      • 1...Qh5
        • 2.Sb5#
      • 1...Qb1
        • 2.Se8#
      • 1...Qa4!
    • 1.Sg7?
      • threat
        • 2.Sf5#
        • 2.Se8#
      • 1...Qf3
        • 2.Se8#
      • 1...Qa4
        • 2.Sf5#
      • 1...Qg4
        • 2.Se8#
      • 1...Qf1
        • 2.Se8#
      • 1...Qh5!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Sb5#
        • 2.Sf5#
      • 1...cxd4
        • 2.c5#
      • 1...exd4
        • 2.e5#
      • 1...Qb3
        • 2.Sf5#
      • 1...Qf3
        • 2.Sb5#
      • 1...Qa4
        • 2.Sf5#
      • 1...Qg4
        • 2.Sb5#
      • 1...Qh5
        • 2.Sb5#
      • 1...Qb1
        • 2.Sf5#
      • 1...Qf1
        • 2.Sb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);::S(E)
      • Refutation
        • Q(a);
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);::S(E)
      • Refutation
        • Q(a);
  • Actual
    • S(E);
    • Threat
      • DUALS(2)
    • Vars
      • P(b);OGATE,XS(E)::P(B)
      • P(c);OGATE,XS(E)::P(C)
      • Q(a);::S(E)
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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).