MESON Chess Problem Database

Problem Display
PID: 176173 (2kN4/K6Q/n3N3/2n5/8/8/8/8 w - - 0 1)

Petkov, Petko Andonov

Schach-Echo, 1962

2kN4/K6Q/n3N3/2n5/8/8/8/8

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sb3
      • 2.Qb7#
    • 1...Sd3
      • 2.Qb7#
    • 1...Sa4
      • 2.Qb7#
    • 1...Se4
      • 2.Qb7#
    • 1...Sb7
      • 2.Qxb7#
    • 1...Sb4
      • 2.Qc7#
    • 1...Sc7
      • 2.Qxc7#
    • 1...Sb8
      • 2.Qc7#
  • Keys
    • 1.Sc6!
      • 1...Sxe6
        • 2.Qb7#
      • 1...Sb3
        • 2.Qb7#
      • 1...Sd3
        • 2.Qb7#
      • 1...Sa4
        • 2.Qb7#
      • 1...Se4
        • 2.Qb7#
      • 1...Sb7
        • 2.Qxb7#
      • 1...Sd7
        • 2.Se7#
      • 1...Sb4
        • 2.Qc7#
      • 1...Sc7
        • 2.Qxc7#
      • 1...Sb8
        • 2.Qc7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB1(C)
    • S(a);N_GUARD::QAB1(C),XS(a)
    • S(b);N_GUARD::QAR1(C)
    • S(b);N_GUARD::QAR1(C),XS(b)
  • Actual
    • S(D);
    • Vars
      • S(a);N_GUARD,XS(A)::QAB1(C)
      • S(a);N_GUARD::QAB1(C)
      • S(a);N_GUARD::QAB1(C),XS(a)
      • S(a);SBLOCK::S(D)
      • S(b);N_GUARD::QAR1(C)
      • S(b);N_GUARD::QAR1(C),XS(b)
HTML5 logo

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).