Problem Display
PID: 77020 (1n6/Rp1p4/3p4/pk6/N1R5/1K6/8/8 w - - 0 1)

Butwillo, Brother

The Tablet, 1948

(First published on Sat Jul 10 1948)

1n6/Rp1p4/3p4/pk6/N1R5/1K6/8/8

#2

4 + 6


15239 Valois Notebooks 2016

SOLUTION


  • SOUND
  • Sets
    • 1...Sa6
      • 2.Rxb7#
    • 1...d5
      • 2.Rc5#
    • 1...b6
      • 2.Sc3#
  • Tries
    • 1.Rc8?
      • 1...Sa6
        • 2.Rxb7#
      • 1...d5
        • 2.Rc5#
      • 1...b6
        • 2.Sc3#
      • 1...Sc6!
  • Keys
    • 1.Rc7!
      • 1...Sa6
        • 2.Raxb7#
      • 1...Sc6
        • 2.Rcxb7#
      • 1...d5
        • 2.Rc5#
      • 1...b6
        • 2.Sc3#

FEATURES


  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(f);SBLOCK::R(D),XP(d)
    • P(c);N_GUARD::R1(C)
    • P(d);SBLOCK::S(B)
  • Tries
    • Try
      • R(C);
      • Vars
        • S(f);SBLOCK::R(D),XP(d)
        • P(c);N_GUARD::R1(C)
        • P(d);SBLOCK::S(B)
      • Refutation
        • S(f);
  • Actual
    • R(C);
    • Vars
      • S(f);SBLOCK::R(D),XP(d)
      • S(f);SBLOCK::R(C),XP(d)
      • P(c);N_GUARD::R1(C)
      • P(d);SBLOCK::S(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).