MESON Chess Problem Database

Problem Display
PID: 195956 (8/2Q5/8/4N2N/4k3/4P3/2P3K1/8 w - - 0 1)

Libis, Zdenek

Sachova skladba, 2011

8/2Q5/8/4N2N/4k3/4P3/2P3K1/8

#2

6 + 1

5454 Near Snap 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Qd6?
      • 1...Kxe3
        • 2.Qd3#
      • 1...Kf5!
    • 1.Qd7?
      • 1...Kxe3
        • 2.Qd3#
      • 1...Kxe5!
  • Keys
    • 1.Qe7!
      • 1...Kxe3
        • 2.Sf3#
      • 1...Kd5
        • 2.Sf6#
      • 1...Kf5
        • 2.Sg3#

Anticipated by 24363(1888), 24207(1908), 189684(1912)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(F);
      • Vars
        • K(a);P-FLIGHT,XP(C)::QAR1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);
      • Vars
        • K(a);P-FLIGHT,XP(C)::QAR1(F)
      • Refutation
        • K(a);P-FLIGHT,XS(D)
  • Actual
    • Q(F);
    • Vars
      • K(a);P-FLIGHT,XP(C)::QAR(F)+S(D)
      • K(a);S_FLIGHT::S(E)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).