MESON Chess Problem Database

Problem Display
PID: 7441 (8/N1K2p2/4k3/6Q1/4P3/4n3/8/8 w - - 0 1)

Krizhanivsky, Vasil Viktorovich

2nd Prize=, Bron MT, 1990

8/N1K2p2/4k3/6Q1/4P3/4n3/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Sd5+
      • 2.exd5#
  • Tries
    • 1.Sc8?
      • threat
        • 2.Qe7#
      • 1...Sd5+
        • 2.exd5#
      • 1...Sf5
        • 2.Qxf5#
      • 1...f6!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Sd4#
        • 2.Sd8#
        • 2.Qe7#
        • 2.Qe5#
      • 1...Sd5+
        • 2.exd5#
      • 1...f5
        • 2.Qe7#
        • 2.Qg6#
      • 1...f6
        • 2.Qg8#
      • 1...Sc2
        • 2.Sd8#
        • 2.Qe7#
        • 2.Qe5#
        • 2.Qf5#
      • 1...Sc4
        • 2.Sd4#
        • 2.Sd8#
        • 2.Qe7#
        • 2.Qf5#
      • 1...Sg4
        • 2.Sd4#
        • 2.Sd8#
        • 2.Qe7#
        • 2.Qf5#
      • 1...Sf5
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(a);CHECK,OGATE::P(A),XS(a)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAR1(B)
      • Vars
        • S(a);CHECK,OGATE::P(A),XS(a)
        • S(a);N_GUARD::QAB1(B),XS(a)
      • Refutation
        • P(c);
  • Actual
    • S(C);
    • Threat
      • DUALS(4)
    • Vars
      • S(a);CHECK,OGATE::P(A),XS(a)
      • P(c);OGATEB,SBLOCK::QAB(B)
      • S(a);N_GUARD::QAB1(B),XS(a)
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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).