MESON Chess Problem Database

Problem Display
PID: 108869 (7K/2nn4/8/7Q/1Bk5/4P3/1R6/2N5 w - - 0 1)

Leontieva, Nadezhda Aleksandrovna

Zpravodaj Kotva, 1967

7K/2nn4/8/7Q/1Bk5/4P3/1R6/2N5

#2

6 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sb5
      • 2.Qf7#
    • 1...Sd5
      • 2.Qe2#
    • 1...Sc5
      • 2.Qxc5#
    • 1...Sb6
      • 2.Qc5#
    • 1...Sf6
      • 2.Qc5#
    • 1...Sb8
      • 2.Qc5#
    • 1...Sf8
      • 2.Qc5#
  • Tries
    • 1.Qf5?
      • threat
        • 2.Qd3#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Se5!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Rc2#
      • 1...Sb5
        • 2.Qa2#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sd5
        • 2.Qa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • S(b);N_GUARD,SBLOCK::QAB(E)
    • S(b);SBLOCK::QAB(E)
    • S(c);N_GUARD::QAR1(E),XS(c)
    • S(c);N_GUARD::QAR1(E)
  • Tries
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • S(c);N_GUARD::QAR1(E),XS(c)
      • Refutation
        • S(c);
  • Actual
    • Q(E);
    • Threat
      • R(B)
    • Vars
      • S(b);SBLOCK::QAB(E)
      • S(c);N_GUARD::QAR1(E),XS(c)
      • S(b);N_GUARD,SBLOCK::QAB(E)
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).