MESON Chess Problem Database

Problem Display
PID: 71230 (5R2/8/5PNp/4pk1p/b3N1R1/8/Q2BP3/7K w - - 0 1)

Visserman, Eeltje

3rd Prize, Il Due Mosse 12. TT, 1960

5R2/8/5PNp/4pk1p/b3N1R1/8/Q2BP3/7K

#2

9 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Kxg4
      • 2.Qe6#
  • Tries
    • 1.Rf4+?
      • 1...Kxg6
        • 2.Qf7#
        • 2.Qg8#
      • 1...exf4!
    • 1.Rg5+?
      • 1...Kxe4
        • 2.Qc4#
      • 1...hxg5!
    • 1.Qc4?
      • threat
        • 2.Sg3#
        • 2.Sd6#
      • 1...Kxg4
        • 2.Qe6#
      • 1...hxg4
        • 2.Sh4#
        • 2.Se7#
      • 1...h4
        • 2.Sd6#
      • 1...Bc6!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Sh4#
        • 2.Se7#
      • 1...Kxg4
        • 2.Qe6#
      • 1...hxg4
        • 2.Sg3#
        • 2.Sd6#
      • 1...h4
        • 2.Sxh4#
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT,XR(F)::QAB(B)
  • Tries
    • Try
      • R(F);CHECK
      • Refutation
        • P(b);XR(F)
    • Try
      • R(F);CHECK
      • Vars
        • K(c);S_FLIGHT,XS(E)::QAR2(B)
      • Refutation
        • P(e);XR(F)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);S_FLIGHT,XR(F)::QAB(B)
        • P(d);::S(E)
      • Refutation
        • B(a);P_PINS(E)
  • Actual
    • Q(B);
    • Threat
      • DUALS(2)
    • Vars
      • K(c);S_FLIGHT,XR(F)::QAB(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).