MESON Chess Problem Database

Problem Display
PID: 22281 (8/8/8/5K2/3Q4/8/6k1/6NN w - - 0 1)

Helmig, H

Funkschach, 1926

8/8/8/5K2/3Q4/8/6k1/6NN

#2

4 + 1

SOLUTION

  • SOUND
  • Sets
    • 1...Kf1
      • 2.Qf2#
  • Tries
    • 1.Sg3?
      • 1...Kh2
        • 2.Qf2#
      • 1...Kxg3!
    • 1.Qh4?
      • 1...Kf1
        • 2.Qf2#
      • 1...Kxg1!
  • Keys
    • 1.Sf3!
      • 1...Kf1
        • 2.Qf2#
      • 1...Kxh1
        • 2.Qg1#
      • 1...Kxf3
        • 2.Qf2#
        • 2.Qe4#
      • 1...Kh3
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAR1(C)
  • Tries
    • Try
      • S(B);
      • Vars
        • K(a);P-FLIGHT::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT,XS(B)
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT,XS(A)
  • Actual
    • S(A);
    • Vars
      • K(a);S_FLIGHT::QAR1(C)
      • K(a);S_FLIGHT,XS(B)::QAR1(C)
      • K(a);S_FLIGHT::QAB1(C)
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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).