BDS
L’Echiquier Belge, ????
#4
1.Qd6! [2.Qe7 (3.Sc6+ dxc6 4.Qe3#
3.Qg5 (4.Qe3#)
Qf4+ 4.Qxf4#)
Qf4+ 3.gxf4 & 4.Sxf3,Qc5#
Qf6 3.Sc6+ Qxc6 4.Qe3#
dxc6 4.Qe3#
3.Qxf6 & 4.Sxf3,Sc6,Qf4#]
1...Qf5 2.Bxf5 (3.Sxf3#)
c2 3.Qc7 & 4.Sxf3#
1...g6 2.Sxf3+ Qxf3 3.Qf6+ Qxf6 4.f4#
Composed for the WCSC in years past, so intentionally difficult, though I was happy to include the nice 2nd variation.
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).