MESON Chess Problem Database

Problem Display
PID: 183723 (8/5p2/5Q2/4n2k/8/4NP1K/8/8 w - - 0 1)

Oplyan, Ekaterina

Kudesnik, 2018

8/5p2/5Q2/4n2k/8/4NP1K/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Sg4
      • 2.fxg4#
  • Tries
    • 1.Sf5?
      • threat
        • 2.Sg3#
        • 2.Sg7#
        • 2.Qh6#
      • 1...Sg4
        • 2.Sg3#
        • 2.Sg7#
        • 2.fxg4#
      • 1...Sg6!
  • Keys
    • 1.Sg4!
      • threat
        • 2.Qf5#
        • 2.Qh6#
      • 1...Sxf3
        • 2.Qh6#
      • 1...Sxg4
        • 2.fxg4#
      • 1...Sg6
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(a);OGATE::P(B),XS(a)
  • Tries
    • Try
      • S(A);
      • Threat
        • DUALS(3)
      • Refutation
        • S(a);
  • Actual
    • S(A);
    • Threat
      • DUALS(2)
    • Vars
      • S(a);XP(B)::QAR1(D)
      • S(a);OGATE,XS(A)::P(B),XS(a)
      • S(a);::QAR2(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).