MESON Chess Problem Database

Problem Display
PID: 180916 (1n6/1K3p2/3Bpn1q/b2kP3/B1pN4/1P2PP2/6N1/8 w - - 0 1)

Howard, David M

Problem Observer, 2013

1n6/1K3p2/3Bpn1q/b2kP3/B1pN4/1P2PP2/6N1/8

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qf4
      • 2.Sxf4#
    • 1...Qg7
      • 2.Sf4#
    • 1...Qf8
      • 2.Sf4#
    • 1...Qh1
      • 2.Sf4#
    • 1...Qh3
      • 2.Sf4#
    • 1...Qh5
      • 2.Sf4#
    • 1...Qg6
      • 2.Sf4#
    • 1...Qh7
      • 2.Sf4#
    • 1...Qh8
      • 2.Sf4#
    • 1...Sa6
      • 2.Bc6#
    • 1...Sc6
      • 2.Bxc6#
    • 1...Sd7
      • 2.Bc6#
    • 1...cxb3
      • 2.Bxb3#
  • Keys
    • 1.Sc6!
      • threat
        • 2.Se7#
      • 1...Qxe3
        • 2.Sxe3#
      • 1...Sxc6
        • 2.Bxc6#
      • 1...cxb3
        • 2.Bxb3#
      • 1...Qf8
        • 2.Sf4#
      • 1...Bd8
        • 2.Sb4#
      • 1...Sg8
        • 2.e4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 10
  • Sets
    • Q(f);N_GUARD::S(A),XQ(f)
    • Q(f);N_GUARD::S(A)
    • S(h);N_GUARD::B(E)
    • S(h);N_GUARD::B(E),XS(h)
    • P(a);OGATE,XP(B)::B(E),XP(a)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • Q(f);XP(C)::S(A),XQ(f)
      • S(h);OGATE,XS(F)::B(E),XS(h)
      • P(a);OGATE,XP(B)::B(E),XP(a)
      • Q(f);N_GUARD::S(A)
      • B(b);N_GUARD::S(F)
      • S(e);N_GUARD::P(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).