MESON Chess Problem Database

Problem Display
PID: 152486 (Bb1rnQ2/1r1p1b2/8/8/2NR3p/4Nk1q/K3p3/4B1R1 w - - 0 1)

Harley, Brian

The Observer, 1928

(First published on Sun Dec 16 1928)

Bb1rnQ2/1r1p1b2/8/8/2NR3p/4Nk1q/K3p3/4B1R1

#2

8 + 10

15290 Harley Scrapbook 2014
15239 Valois Notebooks 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bd6
      • 2.Bxb7#
  • Keys
    • 1.Sg2!
      • threat
        • 2.Qa3#
      • 1...Bf4
        • 2.Rxf4#
      • 1...Qf5
        • 2.Sxh4#
      • 1...Qe6
        • 2.Sxh4#
      • 1...Bd6
        • 2.Bxb7#
      • 1...Sd6
        • 2.Rf4#
      • 1...d5
        • 2.Sd2#
      • 1...d6
        • 2.Rf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • B(h);S_CUTP(f)::B(G),XR(e)
  • Actual
    • S(D);
    • Threat
      • QAR(H)
    • Vars
      • B(h);N_GUARD,N_SPINB(g)::R1(F),XB(h)
      • Q(c);N_GUARD,N_SPINB(g)::S(D),XP(d)
      • Q(c);N_GUARD::S(D),XP(d)
      • B(h);S_CUTP(f)::B(G),XR(e)
      • S(j);S_CUTB(h)::R1(F)
      • P(f);N_PINS(E),N_SPINR(e)::S(E)
      • P(f);S_CUTB(h)::R1(F)
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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).