MESON Chess Problem Database

Problem Display
PID: 249640 (rrN2nQ1/pkppN3/6n1/8/8/1K4B1/4B3/8 w - - 0 1)

Popov, Mikhail Nikolov

Stella Polaris, 1969

rrN2nQ1/pkppN3/6n1/8/8/1K4B1/4B3/8

#2

6 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Qd5#
  • Keys
    • 1.Qc4!
      • threat
        • 2.Qb5#
        • 2.Qa6#
        • 2.Qb4#
        • 2.Qxc7#
      • 1...Rxc8
        • 2.Qb5#
        • 2.Qb4#
      • 1...Sxe7
        • 2.Qa6#
        • 2.Qxc7#
      • 1...Se6
        • 2.Qb5#
        • 2.Qa6#
        • 2.Qb4#
      • 1...Sf4
        • 2.Qb5#
        • 2.Qa6#
        • 2.Qb4#
      • 1...Se5
        • 2.Qb5#
        • 2.Qa6#
        • 2.Qb4#
      • 1...a5
        • 2.Qb5#
        • 2.Qxc7#
      • 1...a6
        • 2.Qb4#
        • 2.Qxc7#
      • 1...c5
        • 2.Qb5#
        • 2.Qd5#
        • 2.Qa6#
      • 1...c6
        • 2.Qa6#
        • 2.Qb4#
      • 1...d6
        • 2.Qb5#
        • 2.Qa6#
        • 2.Qb4#
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • P(d);N_GUARD::QAB(F)
  • Actual
    • Q(F);
    • Threat
      • DUALS(4)
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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).