BDS
The Problemist, 1998
#3
PAOs c4, c7; b6
VAOs a5; c1, h6
1.VAc3! (2.Sf3+ Ke4 3.VAd4#) 1...e5 2.VAa1 & 3.Kb2# 1...Rf8 2.PAa4 & 3.Kb4#
Black’s first move errors are check prevention, allowing the white king to participate in royal anti-battery mates after quiet withdrawals of Chinese pieces.
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).