MESON Chess Problem Database

Problem Display
PID: 223476 (8/1kN5/2N5/4Q3/K7/8/8/8 w - - 0 1)

Dahl, Hans

Funkschach, 1926

8/1kN5/2N5/4Q3/K7/8/8/8

#2

4 + 1

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Sa6?
      • 1...Kxa6
        • 2.Qb5#
      • 1...Kb6
        • 2.Qb5#
      • 1...Ka8
        • 2.Qb8#
      • 1...Kc8
        • 2.Qc7#
      • 1...Kxc6!
    • 1.Se6?
      • 1...Ka6
        • 2.Qb5#
      • 1...Kb6
        • 2.Qb5#
      • 1...Ka8
        • 2.Qb8#
      • 1...Kc8
        • 2.Qc7#
      • 1...Kxc6!
    • 1.Sa8?
      • 1...Ka6
        • 2.Qb5#
      • 1...Kxa8
        • 2.Qb8#
      • 1...Kc8
        • 2.Qc7#
      • 1...Kxc6!
  • Keys
    • 1.Se8!
      • 1...Ka6
        • 2.Qb5#
      • 1...Kb6
        • 2.Qb5#
      • 1...Kxc6
        • 2.Qb5#
      • 1...Ka8
        • 2.Qb8#
      • 1...Kc8
        • 2.Qc7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);
      • Vars
        • K(a);S_FLIGHT,XS(D)::QAB1(B)
        • K(a);P-FLIGHT::QAR1(B)
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
    • Try
      • S(D);
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
        • K(a);P-FLIGHT::QAR1(B)
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
    • Try
      • S(D);
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
        • K(a);S_FLIGHT,XS(D)::QAR1(B)
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
  • Actual
    • S(D);
    • Vars
      • K(a);S_FLIGHT::QAB1(B)
      • K(a);P-FLIGHT::QAR1(B)
      • K(a);S_FLIGHT,XS(C)::QAB1(B)
      • K(a);S_FLIGHT::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).