MESON Chess Problem Database

Problem Display
PID: 202244 (3K3b/6k1/2Q5/8/7N/8/8/8 w - - 0 1)

Kohser, H

Dresdner Anzeiger, 1923

3K3b/6k1/2Q5/8/7N/8/8/8

#2

3 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kh7
      • 2.Qg6#
  • Tries
    • 1.Ke7?
      • threat
        • 2.Qg6#
      • 1...Kh7
        • 2.Qg6#
      • 1...Kg8!
    • 1.Ke8?
      • threat
        • 2.Qg6#
      • 1...Kh7
        • 2.Qg6#
      • 1...Kg8!
    • 1.Qe6?
      • 1...Kh7
        • 2.Qg6#
      • 1...Kf8!
  • Keys
    • 1.Qe8!
      • 1...Kf6
        • 2.Qe7#
      • 1...Kh6
        • 2.Qg6#
      • 1...Kh7
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAB1(B)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Threat
        • QAR1(B)
      • Vars
        • K(a);P-FLIGHT::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • K(C);P-FLIGHT
      • Threat
        • QAR1(B)
      • Vars
        • K(a);P-FLIGHT::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);P-FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(a);S_FLIGHT::QAB1(B)
      • K(a);S_FLIGHT::QAR1(B)
      • K(a);P-FLIGHT::QAB1(B)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).