MESON Chess Problem Database

Problem Display
PID: 157048 (8/8/p2pp3/4P3/1P1kPQp1/1KNp4/5PN1/8 w - - 0 1)

Lukashev, Viktor Sergeevich

Best Problems, 2007

8/8/p2pp3/4P3/1P1kPQp1/1KNp4/5PN1/8

#2

8 + 6

4901 Best Problems 2009

SOLUTION

  • SOUND
  • Sets
    • 1...a5
      • 2.Sb5#
    • 1...dxe5
      • 2.Qe3#
    • 1...d5
      • 2.exd5#
  • Tries
    • 1.Sh4?
      • 1...dxe5
        • 2.Qe3#
      • 1...g3
        • 2.Sf3#
      • 1...a5
        • 2.Sb5#
      • 1...d5
        • 2.exd5#
      • 1...d2!
    • 1.Qf8?
      • threat
        • 2.Qxd6#
      • 1...Kxe5
        • 2.Qg7#
        • 2.Qh8#
      • 1...dxe5
        • 2.Qc5#
        • 2.Qd6#
        • 2.Qd8#
      • 1...d5!
    • 1.exd6?
      • threat
        • 2.e5#
      • 1...e5
        • 2.Qe3#
      • 1...d2!
  • Keys
    • 1.Se1!
      • 1...dxe5
        • 2.Qe3#
      • 1...d2
        • 2.Se2#
      • 1...g3
        • 2.Sf3#
      • 1...a5
        • 2.Sb5#
      • 1...d5
        • 2.exd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(d);N_GUARD::S(D)
    • P(e);SBLOCK,XP(H)::QAB1(G)
    • P(e);OGATE::QAR(G)+P(F),XP(e)
  • Tries
    • Try
      • S(B);
      • Vars
        • P(e);SBLOCK,XP(H)::QAB1(G)
        • P(c);N_GUARD::S(B)
        • P(d);N_GUARD::S(D)
        • P(e);OGATE::QAR(G)+P(F),XP(e)
      • Refutation
        • P(a);
    • Try
      • Q(G);
      • Threat
        • QAR2(G),XP(e)
      • Refutation
        • P(e);
    • Try
      • P(H);XP(e)
      • Threat
        • QAR(G)+P(F)
      • Vars
        • P(f);SBLOCK::QAB1(G)
      • Refutation
        • P(a);
  • Actual
    • S(B);
    • Vars
      • P(e);SBLOCK,XP(H)::QAB1(G)
      • P(a);N_GUARD::S(D)
      • P(c);N_GUARD::S(B)
      • P(d);N_GUARD::S(D)
      • P(e);OGATE::QAR(G)+P(F),XP(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).