MESON Chess Problem Database

Problem Display
PID: 123418 (k1n5/Pp6/8/1N2K3/8/8/8/4Q3 w - - 0 1)

Lokker, Miklosh S

Zpravodaj Kotva, 1967

k1n5/Pp6/8/1N2K3/8/8/8/4Q3

#2

4 + 3

254 Stella Polaris 1967
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...b6
      • 2.Qh1#
      • 2.Qe4#
  • Tries
    • 1.Qf2?
      • threat
        • 2.Sc7#
      • 1...Sxa7
        • 2.Qxa7#
      • 1...b6
        • 2.Qg2#
        • 2.Qf3#
      • 1...Sb6!
    • 1.Qa5?
      • threat
        • 2.Sc7#
      • 1...Sxa7
        • 2.Qxa7#
      • 1...b6!
    • 1.Qg1?
      • threat
        • 2.Sc7#
      • 1...Sxa7
        • 2.Qxa7#
      • 1...b6
        • 2.Qh1#
        • 2.Qg2#
      • 1...Sb6!
    • 1.Qe3?
      • threat
        • 2.Sc7#
      • 1...Sxa7
        • 2.Qxa7#
      • 1...b6
        • 2.Qf3#
        • 2.Qe4#
      • 1...Sb6!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Sc7#
      • 1...Sxa7
        • 2.Qxa7#
      • 1...b6
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • S(B)
      • Vars
        • S(c);OGATE,XP(D)::QAR1(A),XS(c)
      • Refutation
        • S(c);
    • Try
      • Q(A);
      • Threat
        • S(B)
      • Vars
        • S(c);OGATE,P_SPINS(c),XP(D)::QAR1(A),XS(c)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Threat
        • S(B)
      • Vars
        • S(c);OGATE,XP(D)::QAR1(A),XS(c)
      • Refutation
        • S(c);
    • Try
      • Q(A);
      • Threat
        • S(B)
      • Vars
        • S(c);OGATE,XP(D)::QAR1(A),XS(c)
      • Refutation
        • S(c);
  • Actual
    • Q(A);
    • Threat
      • S(B)
    • Vars
      • S(c);OGATE,P_SPINS(c),XP(D)::QAR1(A),XS(c)
      • P(a);OGATEB::QAB(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).