MESON Chess Problem Database

Problem Display
PID: 46023 (2r2bnr/3pP1Q1/R2pk1Pn/4p2N/2b1PppB/3P4/3K4/8 w - - 0 1)

Jankevics, Karlis

Problem Paradise, 2002

2r2bnr/3pP1Q1/R2pk1Pn/4p2N/2b1PppB/3P4/3K4/8

#2

9 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.exf8S#
    • 1...Rc6
      • 2.exf8S#
    • 1...Rc7
      • 2.exf8S#
    • 1...Rd8
      • 2.exd8S#
    • 1...Bxg7
      • 2.Sxg7#
    • 1...Sf5
      • 2.Qf7#
    • 1...Sf7
      • 2.Qxf7#
    • 1...Sf6
      • 2.Qxf6#
    • 1...Sxe7
      • 2.Qf6#
  • Tries
    • 1.Qxf8?
      • threat
        • 2.Sg7#
      • 1...Sf5
        • 2.Qxf5#
        • 2.Qf7#
      • 1...Rh7!
  • Keys
    • 1.d4!
      • threat
        • 2.Qxe5#
      • 1...Bxa6
        • 2.d5#
      • 1...Bxg7
        • 2.Sxg7#
      • 1...exd4
        • 2.Sxf4#
      • 1...Rc5
        • 2.exf8S#
      • 1...Rc6
        • 2.exf8S#
      • 1...Sf7
        • 2.Qxf7#
      • 1...Sf6
        • 2.Qxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(i);N_GUARD::PXB(j)=S
    • R(i);N_GUARD,N_SPINP(e)::PXB(j)=S
    • R(i);OGATE::PXR(i)=S
    • B(j);XQ(I)::S(E),XB(j)
    • S(g);N_GUARD::QAB1(I)
    • S(g);N_GUARD::QAB1(I),XS(g)
    • S(k);N_GUARD::QAR1(I),XS(k)
    • S(k);N_GUARD,XP(H)::QAR1(I)
  • Tries
    • Try
      • Q(I);XB(j)
      • Threat
        • S(E)
      • Refutation
        • R(l);
  • Actual
    • P(B);
    • Threat
      • QAR1(I),XP(d)
    • Vars
      • B(a);N_GUARD,N_SPINP(e),XR(F)::P(B)
      • B(j);XQ(I)::S(E),XB(j)
      • P(d);N_GUARD,XP(B)::S(E),XP(b)
      • R(i);N_GUARD::PXB(j)=S
      • R(i);N_GUARD,N_SPINP(e)::PXB(j)=S
      • S(g);N_GUARD::QAB1(I),XS(g)
      • S(k);N_GUARD::QAR1(I),XS(k)
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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).