MESON Chess Problem Database

Problem Display
PID: 119788 (5Qb1/1nR2PPk/1K5p/5p1r/8/8/8/8 w - - 0 1)

Kubbel, Leonid Ivanovich (AKA Kubbel, Karl Artur Leonid)

Schweizerische Schachzeitung, 1909

5Qb1/1nR2PPk/1K5p/5p1r/8/8/8/8

#2

5 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bxf7
      • 2.g8Q#
  • Tries
    • 1.Rc6?
      • threat
        • 2.Qxg8#
        • 2.fxg8Q#
        • 2.fxg8B#
      • 1...Bxf7
        • 2.Qh8#
      • 1...Rh1
        • 2.Qxg8#
        • 2.fxg8Q#
        • 2.fxg8B#
      • 1...Rh2
        • 2.Qxg8#
        • 2.fxg8Q#
        • 2.fxg8B#
      • 1...Rh3
        • 2.Qxg8#
        • 2.fxg8Q#
        • 2.fxg8B#
      • 1...Rh4
        • 2.Qxg8#
        • 2.fxg8Q#
        • 2.fxg8B#
      • 1...Rg5
        • 2.Qxg8#
        • 2.fxg8Q#
        • 2.fxg8B#
      • 1...Sa5
        • 2.Qxg8#
        • 2.fxg8Q#
        • 2.fxg8B#
      • 1...Sc5
        • 2.Qxg8#
        • 2.fxg8Q#
        • 2.fxg8B#
      • 1...Sd8
        • 2.Qxg8#
        • 2.fxg8Q#
        • 2.fxg8B#
      • 1...f4
        • 2.Qxg8#
        • 2.fxg8Q#
        • 2.fxg8B#
      • 1...Sd6!
  • Keys
    • 1.Qd8!
      • threat
        • 2.f8S#
      • 1...Kg6
        • 2.f8S#
      • 1...Kxg7
        • 2.fxg8Q#
        • 2.fxg8R#
      • 1...Bxf7
        • 2.g8Q#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(f);OGATE,XP(C)::P=Q
  • Tries
    • Try
      • R(B);
      • Threat
        • DUALS(3)
      • Vars
        • B(f);OGATE,XP(C)::QAR1(E)
      • Refutation
        • S(d);
  • Actual
    • Q(E);
    • Threat
      • P=S
    • Vars
      • K(e);S_FLIGHT::P=S
      • K(e);P-FLIGHT,XP(D)::PXB(f)=Q
      • B(f);OGATE,XP(C)::P=Q
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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).