MESON Chess Problem Database

Problem Display
PID: 125416 (5K1k/Q6p/8/3n4/8/8/p7/b7 w - - 0 1)

Anonymous

Source?, 0000

5K1k/Q6p/8/3n4/8/8/p7/b7

#2

2 + 5

5454 Near Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bg7+
      • 2.Qxg7#
    • 1...Sc3
      • 2.Qd4#
      • 2.Qg7#
    • 1...Sf6
      • 2.Qg7#
  • Tries
    • 1.Qf7?
      • threat
        • 2.Qg8#
      • 1...Bg7+
        • 2.Qxg7#
      • 1...Sf6
        • 2.Qg7#
      • 1...Se7!
  • Keys
    • 1.Qg1!
      • threat
        • 2.Qg8#
      • 1...Bg7+
        • 2.Qxg7#
      • 1...Sf6
        • 2.Qg7#
      • 1...Se7
        • 2.Qxa1#

This anticipates 16631(1942)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(a);CHECK,N_GUARD::QAB1(A),XB(a)
    • S(c);S_CUTB(a)::QAB1(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • B(a);CHECK,N_GUARD::QAB1(A),XB(a)
        • S(c);S_CUTB(a)::QAB1(A)
      • Refutation
        • S(c);
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • B(a);CHECK,N_GUARD::QAB1(A),XB(a)
      • S(c);S_CUTB(a)::QAB1(A)
      • S(c);N_GUARD::QAB(A),XB(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).