MESON Chess Problem Database

Problem Display
PID: 18264 (8/1kN2B1R/8/8/K2Q4/8/8/8 w - - 0 1)

Willemsens, Luis Cornelis

Tijdschrift vd KNSB, 1954

8/1kN2B1R/8/8/K2Q4/8/8/8

#2

5 + 1

3295 Einfuhrung in die Welt des Schachproblem 1984
136 Problem Observer 2009
5454 Near Snap 2010
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Bd5+?
      • 1...Kc8
        • 2.Qh8#
      • 1...Kb8!
    • 1.Be6?
      • 1...Kb8
        • 2.Qb6#
      • 1...Kc6!
  • Keys
    • 1.Sa6!
      • 1...Kxa6
        • 2.Bc4#
      • 1...Kc6
        • 2.Be8#
      • 1...Ka8
        • 2.Bd5#
      • 1...Kc8
        • 2.Be6#

Anticipated by 90264(1940), 169934(1945)

This anticipates 171998(1970), 35521(1994), 79150(2001)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(D);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(D);
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(C);
    • Vars
      • K(a);S_FLIGHT,XS(C)::B(D)
      • K(a);S_FLIGHT::B(D)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).