MESON Chess Problem Database

Problem Display
PID: 23296 (4q3/8/2p3r1/2PknP1N/1P3Q2/1K2pr2/1n2R3/b5BB w - - 0 1)

Groeneveld, Cornelis

2nd HM., The Problemist, 1997/II

4q3/8/2p3r1/2PknP1N/1P3Q2/1K2pr2/1n2R3/b5BB

#2

9 + 9

102 Probleemblad 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Rxg1
      • 2.Sf6#
    • 1...Rg2
      • 2.Sf6#
    • 1...Rg3
      • 2.Sf6#
    • 1...Rg4
      • 2.Sf6#
    • 1...Rg5
      • 2.Sf6#
    • 1...Rf6
      • 2.Sxf6#
    • 1...Rg7
      • 2.Sf6#
    • 1...Rg8
      • 2.Sf6#
  • Tries
    • 1.Qxf3+?
      • 1...Kd4
        • 2.Qe4#
        • 2.Qxe3#
      • 1...Sxf3!
  • Keys
    • 1.Qxe3!
      • threat
        • 2.Sf4#
      • 1...Rg2
        • 2.Sf6#
      • 1...Rg4
        • 2.Sf6#
      • 1...Sbd3
        • 2.Qe4#
      • 1...Sed3
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • R(h);N_GUARD,XB(A)::S(I)
    • R(h);N_GUARD,N_SPINR(d)::S(I)
    • R(h);N_GUARD::S(I)
    • R(h);N_GUARD::S(I),XR(h)
  • Tries
    • Try
      • Q(F);CHECK,XR(d)
      • Refutation
        • S(f);P_SPINS(f),XQ(F)
  • Actual
    • Q(F);P_SPINQ(F),XP(c)
    • Threat
      • S(I)
    • Vars
      • R(h);N_GUARD,N_SPINR(d)::S(I)
      • R(h);N_GUARD::S(I)
      • S(b);N_PINQ(F)::QAB1(F)
      • S(f);N_PINQ(F)::QAR1(F)
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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).