MESON Chess Problem Database

Problem Display
PID: 169465 (4n3/2PpqpP1/3pkp2/3Nb3/4K3/4N3/8/8 w - - 0 1)

Salthouse, Thomas

Hampstead Express, 1915

(First published on Sat Apr 10 1915)

4n3/2PpqpP1/3pkp2/3Nb3/4K3/4N3/8/8

#2

5 + 8

14868 Pirnie Collection 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qd8
      • 2.cxd8S#
    • 1...Qf8
      • 2.gxf8S#
    • 1...Ba1
      • 2.Sf4#
    • 1...Bb2
      • 2.Sf4#
    • 1...Bc3
      • 2.Sf4#
    • 1...Bd4
      • 2.Sf4#
    • 1...Bf4
      • 2.Sxf4#
    • 1...Sxc7
      • 2.Sxc7#
  • Keys
    • 1.Sf5!
      • 1...Sxc7
        • 2.Sxc7#
      • 1...Sxg7
        • 2.Sxg7#
      • 1...Qd8
        • 2.cxd8S#
      • 1...Qf8
        • 2.gxf8S#
      • 1...Ba1
        • 2.Sf4#
      • 1...Bb2
        • 2.Sf4#
      • 1...Bh2
        • 2.Sd4#
      • 1...Bc3
        • 2.Sf4#
      • 1...Bg3
        • 2.Sd4#
      • 1...Bd4
        • 2.Sf4#
        • 2.Sxd4#
      • 1...Bf4
        • 2.Sxf4#
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(f);OGATE::PXQ(f)=S
    • B(a);N_GUARD::S(C)
    • B(a);N_GUARD::S(C),XB(a)
    • S(h);XP(D)::S(C),XS(h)
  • Actual
    • S(A);
    • Vars
      • S(h);XP(D)::S(C),XS(h)
      • S(h);XP(E)::S(A),XS(h)
      • Q(f);OGATE::PXQ(f)=S
      • B(a);N_GUARD::S(C)
      • B(a);N_GUARD::S(A)
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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).