MESON Chess Problem Database

Problem Display
PID: 248648 (b3Q3/3p4/5kpK/3r2p1/2N2P1P/5r2/5N2/3q4 w - - 0 1)

Blikeng, Bjarne

Parallele 50, 1947

b3Q3/3p4/5kpK/3r2p1/2N2P1P/5r2/5N2/3q4

#2

6 + 8

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Qf7#
    • 1...Rf5
      • 2.Sg4#
  • Tries
    • 1.Qe7+?
      • 1...Kf5
        • 2.Qf7#
      • 1...Kxe7!
    • 1.fxg5+?
      • 1...Kf5
        • 2.Qf7#
        • 2.Qe4#
      • 1...Rxg5!
    • 1.hxg5+?
      • 1...Kf5
        • 2.Qf7#
        • 2.Qe4#
      • 1...Rxg5!
  • Keys
    • 1.f5!
      • threat
        • 2.Qf8#
      • 1...Kxf5
        • 2.Qf7#
      • 1...Rfxf5
        • 2.Se4#
      • 1...Rdxf5
        • 2.Sg4#
      • 1...gxf5
        • 2.hxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(e);P-FLIGHT::QAR2(F)
    • R(c);SBLOCK::S(A)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • K(e);P-FLIGHT::QAR2(F)
      • Refutation
        • K(e);S_FLIGHT,XQ(F)
    • Try
      • P(C);CHECK,XP(d)
      • Refutation
        • R(c);XP(C)
    • Try
      • P(D);CHECK,XP(d)
      • Refutation
        • R(c);XP(D)
  • Actual
    • P(C);
    • Threat
      • QAR2(F)
    • Vars
      • K(e);P-FLIGHT,XP(C)::QAR2(F)
      • R(b);SBLOCK,XP(C)::S(A)
      • R(c);SBLOCK,XP(C)::S(A)
      • P(f);SBLOCK,XP(C)::P(D),XP(d)
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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).