MESON Chess Problem Database

Problem Display
PID: 54969 (2K4b/2n5/R5Pr/3ppkNp/B1N5/3n3P/6Q1/2B5 w - - 0 1)

Shire, David J

Problem Observer, 2004

2K4b/2n5/R5Pr/3ppkNp/B1N5/3n3P/6Q1/2B5

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Qf1#
      • 2.Qf3#
      • 2.Qf2#
    • 1...Sf2
      • 2.Qf3#
      • 2.Qxf2#
    • 1...Sb4
      • 2.Qf1#
      • 2.Qf3#
      • 2.Qf2#
    • 1...Sf4
      • 2.Se3#
    • 1...Sc5
      • 2.Qf1#
      • 2.Qf3#
      • 2.Qf2#
    • 1...Sa8
      • 2.Bd7#
    • 1...Se8
      • 2.Bd7#
    • 1...dxc4
      • 2.Qe4#
    • 1...d4
      • 2.Qe4#
    • 1...h4
      • 2.Qg4#
  • Tries
    • 1.Qf1+?
      • 1...Sf2
        • 2.Qxf2#
      • 1...Sf4!
  • Keys
    • 1.Se4!
      • threat
        • 2.Sg3#
      • 1...Rxg6
        • 2.Qxg6#
      • 1...Sxc1
        • 2.Qf3#
      • 1...Sxa6
        • 2.Bd7#
      • 1...dxe4
        • 2.Qg5#
      • 1...Bf6
        • 2.Rxf6#
      • 1...Sf4
        • 2.Se3#
      • 1...Se6
        • 2.Scd6#
      • 1...h4
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 4
  • Sets
    • S(a);SBLOCK::S(E)
    • S(g);N_GUARD::B(D)
    • P(b);N_GUARD,XS(E)::QAB1(B)
    • P(b);N_GUARD::QAB1(B)
    • P(e);N_GUARD::QAB1(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR(B),XS(a)
      • Refutation
        • S(a);P_SPINS(a)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • R(f);OGATE,XP(H)::QAB1(B),XR(f)
      • S(a);N_GUARD,XB(A)::QAR2(B)
      • S(g);N_GUARD,XR(G)::B(D)
      • P(b);SBLOCK,XS(F)::QAR1(B)
      • B(h);N_GUARD::R1(G),XB(h)
      • S(a);SBLOCK::S(E)
      • S(g);SBLOCK::S(E)
      • P(e);N_GUARD::QAB1(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).