MESON Chess Problem Database

Problem Display
PID: 164688 (1n3b2/NN3K2/4BB2/1p1PP3/bp1kp3/3p1P2/1P3P2/2Qn4 w - - 0 1)

Jankevics, Karlis

Sachmatija, 2007

1n3b2/NN3K2/4BB2/1p1PP3/bp1kp3/3p1P2/1P3P2/2Qn4

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bb3
      • 2.Sxb5#
    • 1...Bc5
      • 2.Qxc5#
    • 1...Bd6
      • 2.exd6#
    • 1...Bh6
      • 2.Qc5#
    • 1...Bg7
      • 2.Qc5#
    • 1...Se3
      • 2.fxe3#
    • 1...Sa6
      • 2.Sc6#
    • 1...Sc6
      • 2.Sxc6#
    • 1...Sd7
      • 2.Sc6#
    • 1...exf3
      • 2.Qf4#
  • Tries
    • 1.Qe3+?
      • 1...Kc4
        • 2.Sa5#
        • 2.d6#
      • 1...Sxe3!
  • Keys
    • 1.d6!
      • threat
        • 2.Qc5#
      • 1...Bxd6
        • 2.exd6#
      • 1...exf3
        • 2.Qf4#
      • 1...d2
        • 2.Qxd2#
      • 1...Bc2
        • 2.Sxb5#
      • 1...Sc3
        • 2.Qe3#
      • 1...Sa6
        • 2.Sc6#
      • 1...Sd7
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • B(c);N_GUARD::S(I),XP(g)
    • B(i);N_GUARD::QAB1(A),XB(i)
    • B(i);OGATE::B(H)+P(F),XB(i)
    • B(i);N_GUARD::QAB1(A)
    • S(a);OGATE::P(C),XS(a)
    • S(h);N_GUARD::S(I)
    • S(h);N_GUARD::S(I),XS(h)
    • P(f);OGATEB,XP(D)::QAR2(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Refutation
        • S(a);XQ(A)
  • Actual
    • P(E);
    • Threat
      • QAB1(A)
    • Vars
      • B(i);OGATE,XP(E)::B(H)+P(F),XB(i)
      • P(f);OGATEB,XP(D)::QAR2(A)
      • P(b);OGATEB::QAR2(A),XP(b)
      • B(c);N_GUARD::S(I),XP(g)
      • S(a);N_GUARD::QAB1(A)
      • S(h);N_GUARD::S(I)
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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).