MESON Chess Problem Database

Problem Display
PID: 85810 (r3k3/n1p3p1/4K3/8/8/8/8/Q7 w q - 0 1)

Speckmann, Werner

Skakbladet, 1966

r3k3/n1p3p1/4K3/8/8/8/8/Q7

#2

2 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sb5
      • 2.Qxa8#
    • 1...g5
      • 2.Qh8#
    • 1...g6
      • 2.Qh8#
  • Tries
    • 1.Qxg7?
      • threat
        • 2.Qh8#
        • 2.Qe7#
        • 2.Qg8#
      • 1...Kd8
        • 2.Qf8#
        • 2.Qh8#
        • 2.Qd7#
        • 2.Qg8#
      • 1...Sc6
        • 2.Qh8#
        • 2.Qg8#
      • 1...Sc8
        • 2.Qh8#
        • 2.Qg8#
      • 1...0-0-0!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Qh8#
      • 1...Kd8
        • 2.Qh8#
      • 1...Kf8
        • 2.Qh8#
      • 1...0-0-0
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(a);OGATE::QAR(A),XR(d)
    • P(c);OGATE::QAR(A)
  • Tries
    • Try
      • Q(A);XP(c)
      • Threat
        • DUALS(3)
      • Refutation
        • K(e);0-0-0
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • K(e);P-FLIGHT::QAR(A)
      • K(e);P-FLIGHT::QAR2(A)
      • K(e);0-0-0::QAR2(A)
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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).