MESON Chess Problem Database

Problem Display
PID: 11739 (8/8/4Qn2/8/8/5k1K/5pN1/5n2 w - - 0 1)

Lokker, Miklosh S

3rd HM., Platov MT, 1971

8/8/4Qn2/8/8/5k1K/5pN1/5n2

#2

3 + 4

3296 Shakhmatny zadachi miniaturi 1987

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Qe3#
    • 1...Sh2
      • 2.Qe3#
    • 1...Se3
      • 2.Qxe3#
    • 1...Sg3
      • 2.Qe3#
    • 1...Se4
      • 2.Qg4#
    • 1...Sg4
      • 2.Qxg4#
    • 1...Sd5
      • 2.Qg4#
    • 1...Sh5
      • 2.Qg4#
    • 1...Sd7
      • 2.Qg4#
    • 1...Sh7
      • 2.Qg4#
    • 1...Se8
      • 2.Qg4#
    • 1...Sg8
      • 2.Qg4#
  • Tries
    • 1.Qc4?
      • 1...Sd2
        • 2.Qd3#
      • 1...Sh2
        • 2.Qd3#
      • 1...Se3
        • 2.Sh4#
      • 1...Sg3
        • 2.Qd3#
      • 1...Sg4
        • 2.Qxg4#
      • 1...Sd5
        • 2.Qg4#
      • 1...Sh5
        • 2.Qg4#
      • 1...Sd7
        • 2.Qg4#
      • 1...Sh7
        • 2.Qg4#
      • 1...Se8
        • 2.Qg4#
      • 1...Sg8
        • 2.Qg4#
      • 1...Se4!
  • Keys
    • 1.Qe5!
      • threat
        • 2.Sh4#
      • 1...Se3
        • 2.Qxe3#
      • 1...Se4
        • 2.Qh5#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 10
  • Sets
    • S(a);N_GUARD::QAR1(C)
    • S(a);N_GUARD::QAR1(C),XS(a)
    • S(d);N_GUARD::QAB1(C)
    • S(d);N_GUARD::QAB1(C),XS(d)
  • Tries
    • Try
      • Q(C);
      • Vars
        • S(a);N_GUARD::QAR2(C)
        • S(a);SBLOCK::S(A)
        • S(d);N_GUARD::QAB1(C),XS(d)
        • S(d);N_GUARD::QAB1(C)
      • Refutation
        • S(d);
  • Actual
    • Q(C);
    • Threat
      • S(A)
    • Vars
      • S(a);N_GUARD::QAR1(C),XS(a)
      • S(d);N_GUARD,SBLOCK::QAB(C)
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).