Problem Display
PID: 2390 (8/8/8/4Q3/8/5p1n/8/5Kbk w - - 0 1)

Harley, Brian

The Observer, 1931

(First published on Sun May 3 1931)

8/8/8/4Q3/8/5p1n/8/5Kbk

#2

2 + 4


3713 Snap 2007
15290 Harley Scrapbook 2014
15239 Valois Notebooks 2018

SOLUTION


  • SOUND
  • Keys
    • 1.Qg3!
      • 1...Bf2
        • 2.Qxh3#
      • 1...Bh2
        • 2.Qxf3#
      • 1...Be3
        • 2.Qxh3#
      • 1...Bd4
        • 2.Qxh3#
      • 1...Bc5
        • 2.Qxh3#
      • 1...Bb6
        • 2.Qxh3#
      • 1...Ba7
        • 2.Qxh3#
      • 1...Sf2
        • 2.Qxg1#
      • 1...Sf4
        • 2.Qxg1#
      • 1...Sg5
        • 2.Qxg1#
      • 1...f2
        • 2.Qg2#

This anticipates 23108(1996)

FEATURES


  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
  • Actual
    • Q(B);
    • Vars
      • B(a);N_GUARD::QAR2(B),XS(d)
      • B(a);SBLOCK::QAB(B),XP(c)
      • S(d);N_GUARD::QAR1(B),XB(a)
      • P(c);N_GUARD::QAB1(B)


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).