MESON Chess Problem Database

Problem Display
PID: 262356 (5N2/5Nk1/8/3Q4/7K/8/8/8 w - - 0 1)

Lemarcis, C

Europe Echecs, 1981

5N2/5Nk1/8/3Q4/7K/8/8/8

#2

4 + 1

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Sd6?
      • 1...Kf6
        • 2.Qg5#
      • 1...Kh6
        • 2.Sf5#
        • 2.Qg5#
      • 1...Kxf8
        • 2.Qf7#
      • 1...Kh8!
    • 1.Sd8?
      • 1...Kf6
        • 2.Qg5#
      • 1...Kh6
        • 2.Qg5#
      • 1...Kxf8
        • 2.Qf7#
      • 1...Kh8!
    • 1.Sh8?
      • 1...Kf6
        • 2.Qg5#
      • 1...Kh6
        • 2.Qg5#
      • 1...Kxf8
        • 2.Qf7#
      • 1...Kxh8!
  • Keys
    • 1.Sh6!
      • 1...Kf6
        • 2.Qg5#
      • 1...Kxh6
        • 2.Qg5#
      • 1...Kxf8
        • 2.Qf7#
      • 1...Kh8
        • 2.Qg8#
        • 2.Qd4#
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB1(B)
        • K(a);N_GUARD,S_FLIGHT,XS(D)::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(C);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB1(B)
        • K(a);N_GUARD,S_FLIGHT,XS(D)::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(C);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB1(B)
        • K(a);N_GUARD,S_FLIGHT,XS(D)::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
  • Actual
    • S(C);
    • Vars
      • K(a);N_GUARD,S_FLIGHT::QAB1(B)
      • K(a);N_GUARD,S_FLIGHT,XS(C)::QAB1(B)
      • K(a);N_GUARD,S_FLIGHT,XS(D)::QAR1(B)
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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).