MESON Chess Problem Database

Problem Display
PID: 201689 (6bk/4Np2/7P/6N1/8/8/8/K7 w - - 0 1)

Erlin, Konrad (AKA Erlinger, Konrad)

Svenska Dagbladet, 1922

6bk/4Np2/7P/6N1/8/8/8/K7

#2

4 + 3

3713 Snap 2020
6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bh7
      • 2.Sxf7#
    • 1...f5
      • 2.Sg6#
    • 1...f6
      • 2.Sg6#
  • Tries
    • 1.Kb1?
      • 1...f5
        • 2.Sg6#
      • 1...f6
        • 2.Sg6#
      • 1...Bh7+!
  • Keys
    • 1.Kb2!
      • 1...Bh7
        • 2.Sxf7#
      • 1...f5
        • 2.Sg6#
      • 1...f6
        • 2.Sg6#

This anticipates 202241(1923)

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • B(b);N_GUARD,SBLOCK::S(B),XP(a)
    • P(a);N_GUARD::S(D)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • P(a);N_GUARD::S(D)
      • Refutation
        • B(b);CHECK
  • Actual
    • K(A);S_FLIGHT
    • Vars
      • B(b);N_GUARD,SBLOCK::S(B),XP(a)
      • P(a);N_GUARD::S(D)
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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).