MESON Chess Problem Database

Problem Display
PID: 231514 (5n2/5Q2/6Pk/8/6K1/8/8/8 w - - 0 1)

Hultberg, Gustav Herbert

Aftonbladet, 1927

5n2/5Q2/6Pk/8/6K1/8/8/8

#2

3 + 2

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Se6
      • 2.Qh7#
    • 1...Sd7
      • 2.Qh7#
    • 1...Sh7
      • 2.Qxh7#
  • Tries
    • 1.Kh4?
      • 1...Se6
        • 2.Qh7#
      • 1...Sd7
        • 2.Qh7#
      • 1...Sh7
        • 2.Qxh7#
      • 1...Sxg6+!
    • 1.Kf5?
      • 1...Sxg6
        • 2.Qxg6#
      • 1...Se6
        • 2.Qh7#
      • 1...Sd7
        • 2.Qh7#
      • 1...Sh7
        • 2.Qxh7#
      • 1...Kh5!
    • 1.Qg8?
      • 1...Se6
        • 2.Qh7#
      • 1...Sd7
        • 2.Qh7#
      • 1...Sh7
        • 2.Qxh7#
      • 1...Sxg6!
  • Keys
    • 1.g7!
      • threat
        • 2.gxf8Q#
        • 2.gxf8B#
        • 2.g8S#
      • 1...Kh7
        • 2.gxf8Q#
      • 1...Se6
        • 2.g8S#
      • 1...Sg6
        • 2.g8S#
      • 1...Sd7
        • 2.g8S#
      • 1...Sh7
        • 2.g8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD::QAR1(C)
    • S(b);N_GUARD::QAR1(C),XS(b)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • S(b);N_GUARD::QAR1(C)
        • S(b);N_GUARD::QAR1(C),XS(b)
      • Refutation
        • S(b);CHECK,XP(B)
    • Try
      • K(A);S_FLIGHT
      • Vars
        • S(b);OGATE,XP(B)::QAR1(C),XS(b)
        • S(b);N_GUARD::QAR1(C)
        • S(b);N_GUARD::QAR1(C),XS(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Vars
        • S(b);N_GUARD::QAR1(C)
        • S(b);N_GUARD::QAR1(C),XS(b)
      • Refutation
        • S(b);XP(B)
  • Actual
    • P(B);
    • Threat
      • DUALS(3)
    • Vars
      • K(a);P-FLIGHT::PXS(b)=Q
      • S(b);::P=S
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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).