Stephenson, Brian D
The Problemist, 1990
#5
7 + 4
This is after
After C Callendar, Westminster Papers, 1874.
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).