MESON Chess Problem Database

Problem Display
PID: 200766 (8/3K4/B1N5/rq1Q4/p7/4N2p/1n1Bk3/3b1R2 w - - 0 1)

Bonavia-Hunt, Rev Noel Aubrey

The Observer, 1948

(First published on Sun Sep 26 1948)

8/3K4/B1N5/rq1Q4/p7/4N2p/1n1Bk3/3b1R2

#2

7 + 7

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Bxb5+?
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sc4
        • 2.Bxc4#
      • 1...Rxb5!
  • Keys
    • 1.Bc1!
      • threat
        • 2.Qd2#
      • 1...Qd3
        • 2.Sd4#
      • 1...Sd3
        • 2.Qf3#
      • 1...Sc4
        • 2.Qxd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(E);CHECK,N_SPINS(F),XQ(g)
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB1(D),XS(b)
        • S(b);N_GUARD,P_SPINS(b)::B(E),XS(b)
      • Refutation
        • R(f);XB(E)
  • Actual
    • B(B);
    • Threat
      • QAR1(D)
    • Vars
      • Q(g);N_PINS(F),P_PINQ(D)::S(F)
      • S(b);N_SPINQ(g),SBLOCK::QAB1(D)
      • S(b);N_GUARD,N_SPINQ(g)::QAB1(D),XB(a)
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).