Problem Display
PID: 214516 (8/6B1/4Np1p/2PPp2B/2KPk3/3Np3/4P3/8 w - - 0 1)

Jentz, Otto Frederick

Brownson's Chess Journal, 1877

8/6B1/4Np1p/2PPp2B/2KPk3/3Np3/4P3/8

#2

9 + 5


6490 yacpdb 2020

SOLUTION


  • SOUND
  • Sets
    • 1...f5
      • 2.Bf3#
  • Tries
    • 1.dxe5?
      • 1...fxe5
        • 2.Bg6#
      • 1...f5
        • 2.Bf3#
      • 1...Kf5!
  • Keys
    • 1.Sxe5!
      • 1...Kf5
        • 2.Bg6#
      • 1...fxe5
        • 2.Bg6#
      • 1...f5
        • 2.Bf3#

FEATURES


  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(d);SBLOCK::B(G)
  • Tries
    • Try
      • P(D);XP(c)
      • Vars
        • P(d);N_GUARD,XP(D)::B(G)
        • P(d);SBLOCK::B(G)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(B);XP(c)
    • Vars
      • K(b);S_FLIGHT::B(G)
      • P(d);N_GUARD,XS(B)::B(G)
      • P(d);SBLOCK::B(G)


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).