MESON Chess Problem Database

Problem Display
PID: 2843 (nN5K/8/8/1Npk4/5Q2/8/8/8 w - - 0 1)

Lehsten, Heinrich Gustav Ludwig

Sudwestdeutsche Schachzeitung, 1889

nN5K/8/8/1Npk4/5Q2/8/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Sb6
      • 2.Sc7#
    • 1...Sc7
      • 2.Sxc7#
    • 1...c4
      • 2.Qf5#
  • Tries
    • 1.Kh7?
      • 1...c4
        • 2.Qf5#
      • 1...Sb6
        • 2.Sc7#
      • 1...Sc7
        • 2.Sxc7#
      • 1...Ke6!
    • 1.Kg8?
      • 1...c4
        • 2.Qf5#
      • 1...Sb6
        • 2.Sc7#
      • 1...Sc7
        • 2.Sxc7#
      • 1...Ke6!
  • Keys
    • 1.Kg7!
      • 1...Ke6
        • 2.Qe4#
      • 1...c4
        • 2.Qf5#
      • 1...Sb6
        • 2.Sc7#
      • 1...Sc7
        • 2.Sxc7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(c);N_GUARD::S(B)
    • S(c);N_GUARD::S(B),XS(c)
    • P(a);SBLOCK::QAR2(A)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Vars
        • P(a);SBLOCK::QAR2(A)
        • S(c);N_GUARD::S(B)
        • S(c);N_GUARD::S(B),XS(c)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • K(D);P-FLIGHT
      • Vars
        • P(a);SBLOCK::QAR2(A)
        • S(c);N_GUARD::S(B)
        • S(c);N_GUARD::S(B),XS(c)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • K(D);S_FLIGHT
    • Vars
      • K(b);S_FLIGHT::QAR2(A)
      • P(a);SBLOCK::QAR2(A)
      • S(c);N_GUARD::S(B)
      • S(c);N_GUARD::S(B),XS(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).