MESON Chess Problem Database

Problem Display
PID: 185847 (bQ6/8/B1kP4/2P2K2/8/8/8/8 w - - 0 1)

Lincoln, Robert A

Problem Observer, 2016

bQ6/8/B1kP4/2P2K2/8/8/8/8

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Kd7
      • 2.Qc8#
  • Tries
    • 1.Ke6?
      • threat
        • 2.Qc7#
        • 2.Qb5#
        • 2.Qb6#
        • 2.Qc8#
      • 1...Bb7
        • 2.Qc7#
      • 1...Kxc5!
    • 1.Qxa8+?
      • 1...Kd7
        • 2.Bb5#
        • 2.Qc8#
      • 1...Kxc5!
  • Keys
    • 1.Ke5!
      • threat
        • 2.Qc7#
        • 2.Qb5#
        • 2.Qc8#
      • 1...Kxc5
        • 2.Qb5#
      • 1...Kd7
        • 2.Qc8#
      • 1...Bb7
        • 2.Qc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB1(E)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Threat
        • DUALS(4)
      • Vars
        • B(b);::QAR1(E)
      • Refutation
        • K(a);P-FLIGHT,XP(A)
    • Try
      • Q(E);CHECK,XB(b)
      • Refutation
        • K(a);P-FLIGHT,XP(A)
  • Actual
    • K(B);P-FLIGHT
    • Threat
      • DUALS(3)
    • Vars
      • K(a);P-FLIGHT,XP(A)::QAR1(E)
      • K(a);S_FLIGHT::QAB1(E)
      • B(b);::QAR1(E)
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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).