MESON Chess Problem Database

Problem Display
PID: 531 (2B1RNK1/5p2/5k2/2B3p1/5n2/1b6/1b6/5Q2 w - - 0 1)

Peake, JL

The Observer, 1959

(First published on Sun Mar 22 1959)

2B1RNK1/5p2/5k2/2B3p1/5n2/1b6/1b6/5Q2

#2

6 + 6

17397 Ling Notebooks 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Ba1
      • 2.Qxa1#
    • 1...Bc1
      • 2.Bd4#
    • 1...Ba3
      • 2.Bd4#
    • 1...Bd4
      • 2.Bxd4#
    • 1...Be5
      • 2.Be7#
    • 1...g4
      • 2.Qxf4#
  • Tries
    • 1.Bb6?
      • threat
        • 2.Bd8#
      • 1...Ba3
        • 2.Bd4#
      • 1...Be6!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Be7#
      • 1...Ba3
        • 2.Bd4#
      • 1...Bd5
        • 2.Qxb2#
      • 1...Sd5
        • 2.Qc6#
      • 1...Sg6
        • 2.Sh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • B(a);OGATEB::QAB(A),XB(a)
    • B(a);N_GUARD::B(B)
    • B(a);N_GUARD::B(B),XB(a)
    • B(a);SBLOCK::B(B)
    • P(d);N_GUARD::QAR2(A),XS(c)
  • Tries
    • Try
      • B(B);
      • Threat
        • B(B)
      • Vars
        • B(a);N_GUARD::B(B)
      • Refutation
        • B(b);
  • Actual
    • Q(A);N_PINS(c)
    • Threat
      • B(B)
    • Vars
      • B(a);N_GUARD::B(B)
      • B(b);OGATE::QAB(A),XB(a)
      • S(c);N_GUARD,S_CUTB(b)::QAR(A)
      • S(c);SBLOCK::S(E)
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).