MESON Chess Problem Database

Problem Display
PID: 239878 (6n1/2R1B3/3p2N1/pp1k1PKb/5Pp1/1P1Pb3/4N3/Q2n4 w - - 0 1)

Han, Israel

Variantim, 2009

6n1/2R1B3/3p2N1/pp1k1PKb/5Pp1/1P1Pb3/4N3/Q2n4

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bc1
      • 2.Qd4#
    • 1...Bd2
      • 2.Qd4#
    • 1...Bd4
      • 2.Qxd4#
    • 1...Bxf4+
      • 2.Sexf4#
      • 2.Sgxf4#
    • 1...Sb2
      • 2.Qh1#
    • 1...Sxe7
      • 2.Sxe7#
  • Tries
    • 1.Qf6?
      • threat
        • 2.Qxd6#
        • 2.Qe6#
        • 2.Qf7#
      • 1...Bxf4+
        • 2.Sexf4#
        • 2.Sgxf4#
      • 1...Bxg6
        • 2.Qxd6#
        • 2.Qe6#
      • 1...Sxe7
        • 2.Sxe7#
        • 2.Qe6#
        • 2.Qf7#
      • 1...Bc5
        • 2.Qe6#
        • 2.Qf7#
      • 1...Sh6
        • 2.Qxd6#
        • 2.Qe6#
      • 1...Sxf6!
    • 1.b4?
      • threat
        • 2.Qa2#
      • 1...Bxf4+
        • 2.Sexf4#
        • 2.Sgxf4#
      • 1...axb4
        • 2.Qa8#
      • 1...Sb2
        • 2.Qh1#
      • 1...Sc3!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Qxg8#
      • 1...Bxf4+
        • 2.Sexf4#
        • 2.Sgxf4#
      • 1...Bxg6
        • 2.Qh1#
      • 1...Sxe7
        • 2.Sxe7#
      • 1...Sf6
        • 2.Qa8#
      • 1...Sh6
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • B(b);N_GUARD::QAR1(A)
    • B(b);N_GUARD,N_PINP(E)::QAR1(A),XB(b)
    • S(a);OGATE::QAB(A)
    • S(i);XB(J)::S(H),XS(i)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Refutation
        • S(i);XQ(A)
    • Try
      • P(C);
      • Threat
        • QAB(A)
      • Vars
        • P(d);OGATE,XP(C)::QAB(A)
        • S(a);OGATE::QAB(A)
      • Refutation
        • S(a);
  • Actual
    • Q(A);
    • Threat
      • QAB(A),XS(i)
    • Vars
      • B(g);OGATE,XS(H)::QAB(A)
      • S(i);XB(J)::S(H),XS(i)
      • S(i);OGATE::QAB(A)
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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).