Problem Display
PID: 79396 (6K1/8/4N3/3k4/2N5/8/P3Q3/8 w - - 0 1)

Davey, David Murray

The Tablet, 1965

(First published on Sat Mar 6 1965)

6K1/8/4N3/3k4/2N5/8/P3Q3/8

#2

5 + 1


15239 Valois Notebooks 2017
5454 Near Snap 2019

SOLUTION


  • SOUND
  • Tries
    • 1.Qe3?
      • 1...Kxc4
        • 2.Qb3#
      • 1...Kc6!
  • Keys
    • 1.Qf3+!
      • 1...Kxc4
        • 2.Qb3#
      • 1...Kxe6
        • 2.Qf7#

Anticipated by 195090(1918)

FEATURES


  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);
      • Vars
        • K(a);OGATEB,S_FLIGHT,XS(C)::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(B);CHECK
    • Vars
      • K(a);OGATEB,S_FLIGHT,XS(C)::QAB1(B)
      • K(a);OGATEB,S_FLIGHT,XS(D)::QAB1(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).