Problem Display
PID: 129779 (8/2b2N2/8/8/4kpP1/4Nb2/3Q4/1K6 w - - 0 1)

Leopold, Dr Rudolf L

Deutsche Schachzeitung, 1931

8/2b2N2/8/8/4kpP1/4Nb2/3Q4/1K6

#2

5 + 4


6490 yacpdb 2009

SOLUTION


  • SOUND
  • Sets
    • 1...Be5
      • 2.Sg5#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Sg5#
      • 1...Bd8
        • 2.Scd6#
        • 2.Sfd6#
      • 1...Bxg4!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Sg5#
      • 1...fxe3
        • 2.Qc4#
      • 1...Bd8
        • 2.Sd6#

FEATURES


  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(d);SBLOCK::S(E)
  • Tries
    • Try
      • S(C);
      • Threat
        • S(E)
      • Refutation
        • B(a);XP(D)
  • Actual
    • Q(B);
    • Threat
      • S(E)
    • Vars
      • P(c);SBLOCK,XS(C)::QAR2(B)
      • B(d);N_GUARD::S(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).