MESON Chess Problem Database

Problem Display
PID: 165699 (8/1K4p1/1B1N2pq/1R5p/5k2/7P/2BpP1R1/3r1n2 w - - 0 1)

Shire, David J

Die Schwalbe, 2016

8/1K4p1/1B1N2pq/1R5p/5k2/7P/2BpP1R1/3r1n2

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sg3
      • 2.Rf2#
    • 1...h4
      • 2.Rg4#
    • 1...g5
      • 2.Rf5#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Bc7#
      • 1...g5
        • 2.Rf5#
      • 1...Qg5!
    • 1.Sf7?
      • threat
        • 2.Rb4#
      • 1...Se3
        • 2.Bc7#
      • 1...Sg3
        • 2.Rf2#
      • 1...Rb1!
    • 1.e3+?
      • 1...Kf3
        • 2.Be4#
      • 1...Sxe3!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Bc7#
      • 1...gxf5
        • 2.Rxf5#
      • 1...Sg3
        • 2.Be3#
      • 1...g5
        • 2.Rf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • S(b);SBLOCK::R(C)
    • P(e);N_GUARD::R1(C)
    • P(f);N_GUARD::R1(E)
  • Tries
    • Try
      • S(G);
      • Threat
        • B(F)
      • Vars
        • P(f);N_GUARD::R1(E)
      • Refutation
        • Q(g);
    • Try
      • S(G);
      • Threat
        • R(E)
      • Vars
        • S(b);SBLOCK::B(F)
        • S(b);SBLOCK::R(C)
      • Refutation
        • R(a);
    • Try
      • P(B);CHECK
      • Vars
        • K(d);P-FLIGHT::B(A)
      • Refutation
        • S(b);XP(B)
  • Actual
    • S(G);
    • Threat
      • B(F)
    • Vars
      • P(f);OGATE,XS(G)::R1(E),XP(f)
      • S(b);N_GUARD::B(F)
      • P(f);SBLOCK::R(C)
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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).