MESON Chess Problem Database

Problem Display
PID: 250840 (8/3K1nQ1/4p3/1p1k4/3Pp3/8/1PP5/5B2 w - - 0 1)

Sydenham, Colin Peter

The Problemist, 1991

8/3K1nQ1/4p3/1p1k4/3Pp3/8/1PP5/5B2

#2

6 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Se5+
      • 2.Qxe5#
    • 1...Sg5
      • 2.Qe5#
    • 1...Sd6
      • 2.Qe5#
    • 1...Sh6
      • 2.Qe5#
    • 1...Sd8
      • 2.Qe5#
    • 1...Sh8
      • 2.Qe5#
  • Tries
    • 1.b3?
      • 1...Se5+
        • 2.Qxe5#
      • 1...e3
        • 2.Bg2#
      • 1...Sg5
        • 2.Qe5#
      • 1...Sd6
        • 2.Qe5#
      • 1...Sh6
        • 2.Qe5#
      • 1...Sd8
        • 2.Qe5#
      • 1...Sh8
        • 2.Qe5#
      • 1...b4
        • 2.Bc4#
      • 1...e5!
  • Keys
    • 1.c3!
      • 1...Se5+
        • 2.Qxe5#
      • 1...e3
        • 2.Qg2#
      • 1...Sg5
        • 2.Qe5#
      • 1...Sd6
        • 2.Qe5#
      • 1...Sh6
        • 2.Qe5#
      • 1...Sd8
        • 2.Qe5#
      • 1...Sh8
        • 2.Qe5#
      • 1...b4
        • 2.c4#
      • 1...e5
        • 2.Qxf7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(e);CHECK,N_GUARD::QAR1(F),XS(e)
    • S(e);N_GUARD::QAR1(F)
  • Tries
    • Try
      • P(B);
      • Vars
        • S(e);CHECK,N_GUARD::QAR1(F),XS(e)
        • P(a);OGATEB::B(A)
        • S(e);N_GUARD::QAR1(F)
        • P(b);N_GUARD::B(A)
      • Refutation
        • P(d);
  • Actual
    • P(C);
    • Vars
      • S(e);CHECK,N_GUARD::QAR1(F),XS(e)
      • P(a);OGATEB::QAB(F)
      • S(e);N_GUARD::QAR1(F)
      • P(b);N_GUARD::P(C)
      • P(d);OGATEB::QAB(F),XS(e)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).