Problem Display
PID: 59149 (B7/8/2PpP3/2Bkp2Q/2pPp3/8/8/K7 w - - 0 1)

Baird, Edith Elina Helen (Mrs WJ)

Hereford Times, 1899

B7/8/2PpP3/2Bkp2Q/2pPp3/8/8/K7

#2

7 + 5


3262 700 Chess Problems 1902

SOLUTION


  • SOUND
  • Sets
    • 1...dxc5
      • 2.Qxe5#
  • Tries
    • 1.Qf5?
      • threat
        • 2.c7#
      • 1...dxc5
        • 2.Qxe5#
      • 1...c3!
  • Keys
    • 1.Qf7!
      • threat
        • 2.c7#
        • 2.e7#
      • 1...exd4
        • 2.Qf5#
      • 1...dxc5
        • 2.Qd7#
      • 1...c3
        • 2.e7#
      • 1...e3
        • 2.c7#

FEATURES


  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(e);N_GUARD,XB(C)::QAR1(D),XP(d)
  • Tries
    • Try
      • Q(D);
      • Threat
        • B(G)+P(E)
      • Vars
        • P(e);N_GUARD,XB(C)::QAR1(D),XP(d)
      • Refutation
        • P(a);
  • Actual
    • Q(D);N_PINP(d)
    • Threat
      • DUALS(2)
    • Vars
      • P(d);OGATEB,XP(B)::QAR2(D)
      • P(e);OGATEB,XB(C)::QAR2(D)
      • P(a);::QAB(D)+P(F)
      • P(b);::B(G)+P(E)


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).