MESON Chess Problem Database

Problem Display
PID: 184903 (8/8/1KN5/3pP3/2kp2Q1/PNP1bP1p/Bp2r2q/4n3 w - - 0 1)

Andrade, Barry Jack da Costa

The Observer, 1929

(First published on Sun Feb 3 1929)

8/8/1KN5/3pP3/2kp2Q1/PNP1bP1p/Bp2r2q/4n3

#2

9 + 9

15239 Valois Notebooks 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bc1
      • 2.Qxd4#
    • 1...Bd2
      • 2.Qxd4#
    • 1...Bg5
      • 2.Qxd4#
    • 1...Bh6
      • 2.Qxd4#
  • Keys
    • 1.Qc8!
      • threat
        • 2.Sb4#
      • 1...dxc3+
        • 2.Sc5#
      • 1...d3+
        • 2.Scd4#
      • 1...Kxc3
        • 2.Sb4#
      • 1...Kd3
        • 2.Sb4#
      • 1...Qxe5
        • 2.Sxe5#
      • 1...Sd3
        • 2.Sca5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 4
  • Sets
    • B(e);N_GUARD::QAR1(F),XP(h)
  • Actual
    • Q(F);N_PINP(h)
    • Threat
      • QAR(F)+S(I)
    • Vars
      • P(h);CHECK,SBLOCK,XP(D)::B(A)+S(C)
      • P(h);CHECK,SBLOCK::QAR(F)+S(I)
      • K(g);P-FLIGHT,XP(D)::QAR(F)+S(I)
      • K(g);S_FLIGHT::S(I)
      • Q(d);XP(G)::QAR(F)+S(I),DCHECK,XQ(d)
      • S(a);SBLOCK::QAR(F)+S(I),DCHECK
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).