MESON Chess Problem Database

Problem Display
PID: 179808 (8/R7/1Q1N3P/5Nk1/8/5P2/3P3K/8 w - - 0 1)

Zalkind, Lazar Borissovich

La Strategie, 1912

8/R7/1Q1N3P/5Nk1/8/5P2/3P3K/8

#2

8 + 1

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Qe3#
  • Tries
    • 1.Qg1+?
      • 1...Kf4
        • 2.Qe3#
        • 2.Qg3#
      • 1...Kh5
        • 2.Qg4#
      • 1...Kf6!
    • 1.Qd4?
      • 1...Kh5
        • 2.Qg4#
      • 1...Kg6!
  • Keys
    • 1.Sg3!
      • 1...Kf4
        • 2.Qe3#
      • 1...Kh4
        • 2.Qd8#
      • 1...Kf6
        • 2.Sf7#
      • 1...Kg6
        • 2.Sde4#
      • 1...Kxh6
        • 2.Sde4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB1(E)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);P-FLIGHT::QAB1(E)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(D);
    • Vars
      • K(a);S_FLIGHT::QAB1(E)
      • K(a);S_FLIGHT::QAB(E)
      • K(a);S_FLIGHT::QAR(E)+S(F)
      • K(a);P-FLIGHT::QAR(E)+S(F)
      • K(a);S_FLIGHT,XP(G)::QAR(E)+S(F)
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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).