MESON Chess Problem Database

Problem Display
PID: 251713 (4r2q/1B1ppP1b/1Knkp3/3PN2Q/2Pp4/6N1/7B/3nr3 w - - 0 1)

Maleika, Gerhard

Die Schwalbe, 2021

4r2q/1B1ppP1b/1Knkp3/3PN2Q/2Pp4/6N1/7B/3nr3

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe5
      • 2.fxe8S#
    • 1...Qf6
      • 2.fxe8S#
    • 1...Qg7
      • 2.fxe8S#
    • 1...Bg8
      • 2.fxe8S#
    • 1...Sb4
      • 2.c5#
    • 1...Sa5
      • 2.c5#
    • 1...Sxe5
      • 2.c5#
    • 1...Sa7
      • 2.c5#
    • 1...Sb8
      • 2.c5#
    • 1...Sd8
      • 2.c5#
  • Keys
    • 1.Sg6!
      • threat
        • 2.Se4#
        • 2.Sf5#
        • 2.c5#
      • 1...exd5
        • 2.Qxd5#
      • 1...Re5
        • 2.Se4#
      • 1...Qe5
        • 2.fxe8S#
      • 1...Re4
        • 2.Sxe4#
        • 2.Sf5#
        • 2.c5#
      • 1...Se5
        • 2.c5#
      • 1...e5
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • Q(k);N_GUARD,XS(E)::PXR(j)=S
    • Q(k);N_GUARD::PXR(j)=S
    • B(i);S_CUTQ(k)::PXR(j)=S
    • S(d);::P(C)
    • S(d);XS(E)::P(C)
  • Actual
    • S(E);
    • Threat
      • DUALS(3)
    • Vars
      • P(f);OGATE,XP(D)::QAR1(F),XP(f)
      • R(b);::S(B)
      • Q(k);N_GUARD::PXR(j)=S
      • S(d);::P(C)
      • P(f);::S(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).