MESON Chess Problem Database

Problem Display
PID: 211385 (8/8/RPk1p3/K3Q3/8/8/8/8 w - - 0 1)

Johnsen, Verner

Land og Folk, 1974

8/8/RPk1p3/K3Q3/8/8/8/8

#2

4 + 2

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kb7
      • 2.Qc7#
  • Tries
    • 1.Qd6+?
      • 1...Kb7
        • 2.Qc7#
      • 1...Kxd6!
  • Keys
    • 1.Ra8!
      • 1...Kb7
        • 2.Qe4#
      • 1...Kd7
        • 2.Qc7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAR1(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT,XQ(B)
  • Actual
    • R(C);
    • Vars
      • K(a);S_FLIGHT::QAB(B)
      • K(a);S_FLIGHT::QAR1(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).