MESON Chess Problem Database

Problem Display
PID: 138917 (7K/8/4kN2/Q2N4/4pB2/8/8/8 w - - 0 1)

de Jong, J

Probleemblad, 1974

7K/8/4kN2/Q2N4/4pB2/8/8/8

#2

5 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Qd8?
      • threat
        • 2.Qd7#
      • 1...Kf7
        • 2.Qe8#
        • 2.Qg8#
      • 1...Kf5!
    • 1.Qb5?
      • threat
        • 2.Qd7#
      • 1...Kf7
        • 2.Qe8#
      • 1...Kf5!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Qd7#
      • 1...Kf5
        • 2.Qxe4#
      • 1...Kf7
        • 2.Qe8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • K(b);S_FLIGHT::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • K(b);S_FLIGHT::QAB1(B),XP(a)
      • K(b);S_FLIGHT::QAB1(B)
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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).