MESON Chess Problem Database

Problem Display
PID: 118201 (8/8/p2P3p/P2Q4/kP1P4/n1P5/K7/8 w - - 0 1)

Petkov, Petko Andonov

Themes-64, 1958

8/8/p2P3p/P2Q4/kP1P4/n1P5/K7/8

#2

7 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Qc6#
    • 1...Sc2
      • 2.Qc6#
    • 1...Sc4
      • 2.Qc6#
    • 1...Sb5
      • 2.Qb3#
  • Tries
    • 1.Qf5?
      • 1...Sb1
        • 2.Qd7#
      • 1...Sc2
        • 2.Qd7#
      • 1...Sc4
        • 2.Qd7#
      • 1...Sb5
        • 2.Qc2#
      • 1...h5!
    • 1.d7?
      • 1...Sb1
        • 2.Qc6#
      • 1...Sc2
        • 2.Qc6#
      • 1...Sc4
        • 2.Qc6#
      • 1...Sb5
        • 2.Qb3#
      • 1...h5!
  • Keys
    • 1.Qh5!
      • 1...Sb1
        • 2.Qe8#
      • 1...Sc2
        • 2.Qe8#
      • 1...Sc4
        • 2.Qe8#
      • 1...Sb5
        • 2.Qd1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 4
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB(F)
    • S(a);SBLOCK::QAB1(F)
  • Tries
    • Try
      • Q(F);
      • Vars
        • S(a);N_GUARD::QAB(F)
        • S(a);N_GUARD,SBLOCK::QAB(F)
      • Refutation
        • P(d);
    • Try
      • P(G);
      • Vars
        • S(a);N_GUARD::QAB(F)
        • S(a);SBLOCK::QAB1(F)
      • Refutation
        • P(d);
  • Actual
    • Q(F);
    • Vars
      • S(a);N_GUARD::QAB(F)
      • S(a);N_GUARD,SBLOCK::QAB(F)
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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).