MESON Chess Problem Database

Problem Display
PID: 168424 (1qn1R2b/1Q1p3K/5N2/1bRNnk2/8/1B2B2P/4P3/8 w - - 0 1)

Petite, Efren

Problemas, 2015

1qn1R2b/1Q1p3K/5N2/1bRNnk2/8/1B2B2P/4P3/8

#2

10 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sc4
      • 2.Bc2#
    • 1...Sg4
      • 2.hxg4#
    • 1...Sc6
      • 2.Qxd7#
  • Tries
    • 1.Se7+?
      • 1...Sxe7
        • 2.Qf3#
      • 1...Kxf6!
  • Keys
    • 1.Sh5!
      • threat
        • 2.Sg3#
      • 1...Ke4
        • 2.Sg3#
      • 1...Se7
        • 2.Sxe7#
      • 1...Sd3
        • 2.Se7#
      • 1...Sf3
        • 2.Se7#
      • 1...Sc4
        • 2.Bc2#
      • 1...Sg4
        • 2.Se7#
      • 1...Sc6
        • 2.Qxd7#
      • 1...Sg6
        • 2.Se7#
      • 1...Sf7
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD,S_CUTB(a)::B(B)
    • S(b);OGATE::P(D),XS(b)
    • S(b);N_GUARD,S_CUTB(a)::QAB(H),XP(d)
  • Tries
    • Try
      • S(F);CHECK,P_PINS(b)
      • Vars
        • S(f);XS(F)::QAR2(H)
      • Refutation
        • K(c);N_SPINS(b),P-FLIGHT,XS(G)
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • K(c);P_SPINS(b),S_FLIGHT::S(G)
      • S(f);N_GUARD::S(F),XS(f)
      • S(b);::R(E)+S(F),DCHECK
      • S(b);N_GUARD,S_CUTB(a)::B(B)
      • S(b);N_GUARD,S_CUTB(a)::QAB(H),XP(d)
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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).