MESON Chess Problem Database

Problem Display
PID: 152488 (6K1/7B/8/2Q5/p2p4/1k6/p2R4/b7 w - - 0 1)

Harley, Brian

The Observer, 1929

(First published on Sun Jan 6 1929)

6K1/7B/8/2Q5/p2p4/1k6/p2R4/b7

#2

4 + 5

15290 Harley Scrapbook 2014
15239 Valois Notebooks 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bb2
      • 2.Bc2#
  • Tries
    • 1.Rb2+?
      • 1...Bxb2
        • 2.Bc2#
      • 1...Kxb2!
    • 1.Qc4+?
      • 1...Ka3
        • 2.Rxa2#
      • 1...Kxc4!
    • 1.Qb5+?
      • 1...Kc3
        • 2.Rc2#
      • 1...Ka3!
  • Keys
    • 1.Bd3!
      • 1...a3
        • 2.Qc4#
      • 1...Bb2
        • 2.Bc2#
      • 1...Bc3
        • 2.Bc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(a);SBLOCK::B(C)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • B(a);SBLOCK,XR(A)::B(C)
      • Refutation
        • K(c);P-FLIGHT,XR(A)
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);P-FLIGHT::R1(A),XP(b)
      • Refutation
        • K(c);S_FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);P-FLIGHT::R1(A)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • B(C);
    • Vars
      • P(d);SBLOCK::QAB1(B)
      • B(a);SBLOCK::B(C)
HTML5 logo

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).