Problem Display
PID: 231863 (2N3nK/2PpPkP1/3p3p/3P3p/4B2P/8/8/8 w - - 0 1)

von Wardener, Friedrich Freiherr

Deutsche Schachzeitung, 1901

2N3nK/2PpPkP1/3p3p/3P3p/4B2P/8/8/8

#2

8 + 6


15148 Sadier Collection 2021

SOLUTION


  • SOUND
  • Sets
    • 1...Ke8
      • 2.Bg6#
  • Tries
    • 1.e8Q+?
      • 1...Kxe8
        • 2.Bg6#
      • 1...Kf6!
    • 1.e8B+?
      • 1...Kxe8
        • 2.Bg6#
      • 1...Kf6!
    • 1.e8R?
      • threat
        • 2.Rf8#
      • 1...Kxe8
        • 2.Bg6#
      • 1...Kf6!
  • Keys
    • 1.e8S!
      • 1...Kxe8
        • 2.Bg6#
      • 1...Sf6
        • 2.Sexd6#
      • 1...Se7
        • 2.Scxd6#

FEATURES


  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(e);S_FLIGHT::B(A)
  • Tries
    • Try
      • P(E);CHECK
      • Vars
        • K(e);S_FLIGHT,XQ(E)::B(A)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • P(E);CHECK
      • Vars
        • K(e);S_FLIGHT,XB(E)::B(A)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • P(E);
      • Threat
        • R1(E)
      • Vars
        • K(e);S_FLIGHT,XR(E)::B(A)
      • Refutation
        • K(e);P-FLIGHT
  • Actual
    • P(E);
    • Vars
      • K(e);S_FLIGHT,XS(E)::B(A)
      • S(f);SBLOCK::S(E),XP(b)
      • S(f);SBLOCK::S(G),XP(b)


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).