MESON Chess Problem Database

Problem Display
PID: 18901 (4K3/8/5p2/5QNk/8/8/7P/8 w - - 0 1)

van Dijk, Nils Gustav Gerard

Die Schwalbe, 1959

4K3/8/5p2/5QNk/8/8/7P/8

#2

4 + 2

3147 Chess Problems: Introduction to an Art 1963
3749 FIDE Album (1959-1961) 1966
4884 154 norske miniatyrproblemer 1974
2012 Miniature Chess Problems from Many Countries 1981
3295 Einfuhrung in die Welt des Schachproblem 1984
3310 2345 Chess Problems 1997
56 The Problemist 2001
56 The Problemist 2003
56 The Problemist 2013
136 Problem Observer 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kh4
      • 2.Sf3#
  • Tries
    • 1.Kf8?
      • 1...Kh4
        • 2.Sf3#
      • 1...Kh6
        • 2.Sf7#
      • 1...fxg5!
    • 1.h3?
      • 1...Kh4
        • 2.Qg4#
      • 1...fxg5
        • 2.Qh7#
      • 1...Kh6!
    • 1.h4?
      • 1...Kh6
        • 2.Qh7#
      • 1...fxg5
        • 2.Qxg5#
      • 1...Kxh4!
  • Keys
    • 1.Kf7!
      • 1...Kh4
        • 2.Sf3#
      • 1...Kh6
        • 2.Qg6#
      • 1...fxg5
        • 2.Qh3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::S(C)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::S(C)
      • Refutation
        • P(b);P_SPINP(b),XS(C)
    • Try
      • P(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
        • P(b);P_SPINP(b),SBLOCK,XS(C)::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • P(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
        • P(b);OGATE,P_SPINP(b),XS(C)::QAR1(B),XP(b)
      • Refutation
        • K(a);P-FLIGHT,XP(A)
  • Actual
    • K(D);S_FLIGHT
    • Vars
      • K(a);P-FLIGHT::S(C)
      • K(a);P-FLIGHT::QAR1(B)
      • P(b);P_SPINP(b),SBLOCK,XS(C)::QAR2(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).