Problem Display
PID: 152026 (8/8/5K1Q/8/2p5/B1Nk4/4N3/8 w - - 0 1)

Williams, Philip Hamilton

Hampstead and Highgate Express, 1897

(First published on Sat Nov 27 1897)

8/8/5K1Q/8/2p5/B1Nk4/4N3/8

#2

5 + 2


14867 BCPS Library 2014
5454 Near Snap 2014

SOLUTION


  • SOUND
  • Tries
    • 1.Qe3+?
      • 1...Kc2
        • 2.Sd4#
      • 1...Kxe3!
  • Keys
    • 1.Sd4!
      • 1...Kxc3
        • 2.Qe3#
      • 1...Kxd4
        • 2.Qd2#

This anticipates 49504(1946-1947)

FEATURES


  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);S_FLIGHT::S(A)
      • Refutation
        • K(a);P-FLIGHT,XQ(E)
  • Actual
    • S(A);
    • Vars
      • K(a);P-FLIGHT,XS(C)::QAR2(E)
      • K(a);P-FLIGHT,XS(A)::QAR2(E)


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).