MESON Chess Problem Database

Problem Display
PID: 141368 (qb4N1/1nkPP3/4p2r/1Q6/p3n3/B2N3p/7K/8 w - - 0 1)

Pulcherio, Cauby

3rd Prize, Xeque Mate, 1926

qb4N1/1nkPP3/4p2r/1Q6/p3n3/B2N3p/7K/8

#2

7 + 9

14868 Pirnie Collection 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Sa5
      • 2.d8Q#
    • 1...Sc5
      • 2.d8Q#
    • 1...Sd6
      • 2.d8Q#
    • 1...Sd8
      • 2.e8S#
  • Tries
    • 1.Bd6+?
      • 1...Kxd6
        • 2.e8S#
      • 1...Sbxd6
        • 2.d8Q#
      • 1...Sexd6!
  • Keys
    • 1.Sb4!
      • threat
        • 2.Qc6#
      • 1...Kd6
        • 2.e8S#
      • 1...Ba7
        • 2.Sa6#
      • 1...Qa6
        • 2.Sxa6#
      • 1...Sa5
        • 2.d8Q#
      • 1...Sbc5
        • 2.d8Q#
      • 1...Sbd6
        • 2.d8Q#
      • 1...Sd8
        • 2.e8S#
      • 1...e5
        • 2.Sd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(f);N_GUARD::P=Q
    • S(f);SBLOCK::P=S
  • Tries
    • Try
      • B(B);CHECK
      • Vars
        • K(g);S_FLIGHT,XB(B)::P=S
        • S(f);XB(B)::P=Q
      • Refutation
        • S(c);XB(B)
  • Actual
    • S(C);
    • Threat
      • QAR1(D)
    • Vars
      • K(g);S_FLIGHT::P=S
      • B(i);S_CUTQ(h)::S(C)
      • Q(h);N_GUARD::S(C),XQ(h)
      • S(f);N_GUARD::P=Q
      • S(f);SBLOCK::P=S
      • P(d);N_GUARD::S(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).