MESON Chess Problem Database

Problem Display
PID: 165011 (7B/4Q3/3p1Pp1/3pNkqp/4p1R1/6Pn/4P2K/5B2 w - - 0 1)

Labai, Zoltan

Best Problems, 2017

7B/4Q3/3p1Pp1/3pNkqp/4p1R1/6Pn/4P2K/5B2

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf6
      • 2.Qxf6#
    • 1...dxe5
      • 2.Qd7#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Qd7#
      • 1...Kxg4
        • 2.Bxh3#
      • 1...Qxf6
        • 2.Se3#
      • 1...dxc4
        • 2.Qxe4#
      • 1...Sf4
        • 2.Se3#
      • 1...Qxg4!
    • 1.f7?
      • threat
        • 2.Qd7#
      • 1...Qxg4
        • 2.Qf6#
        • 2.f8Q#
        • 2.f8R#
      • 1...Qf6
        • 2.Qxf6#
      • 1...Sf4
        • 2.Rxg5#
      • 1...Qxe7!
  • Keys
    • 1.Sf7!
      • threat
        • 2.Qd7#
      • 1...Kxg4
        • 2.Bxh3#
      • 1...Qxf6
        • 2.Sh6#
      • 1...Sf4
        • 2.Rxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(e);OGATE,XP(G)::QAR1(H),XQ(e)
    • P(g);SBLOCK,XS(F)::QAB(H)
  • Tries
    • Try
      • S(F);
      • Threat
        • QAB(H)
      • Vars
        • K(d);OGATEB,S_FLIGHT,XR(E)::B(A),XS(a)
        • Q(e);N_GUARD,XP(G)::S(F)
        • P(c);N_GUARD,XS(F)::QAB1(H),XP(b)
        • S(a);S_CUTQ(e)::S(F)
      • Refutation
        • Q(e);XR(E)
    • Try
      • P(G);
      • Threat
        • QAB(H)
      • Vars
        • Q(e);N_GUARD::QAR1(H),XQ(e)
        • S(a);N_GUARD::R1(E),XQ(e)
      • Refutation
        • Q(e);XQ(H)
  • Actual
    • S(F);
    • Threat
      • QAB(H)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XR(E)::B(A),XS(a)
      • Q(e);N_GUARD,XP(G)::S(F)
      • S(a);N_GUARD::R1(E),XQ(e)
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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).