diff -r 29fc780ca130 -r fa7f7144f2bb cws/main_cw04.tex
--- a/cws/main_cw04.tex	Tue Dec 07 01:35:00 2021 +0000
+++ b/cws/main_cw04.tex	Tue Dec 07 23:17:51 2021 +0000
@@ -30,10 +30,6 @@
 This part is about searching and backtracking. You are asked to
 implement Scala programs that solve various versions of the
 \textit{Knight's Tour Problem} on a chessboard.
-% The preliminary part (4\%) is due on  \sout{\cwNINE{}}
-% \textcolor{red}{16 December} at 5pm; the core part (6\%)
-% is due on \cwNINEa{} at 5pm. Any 1\% you achieve in the
-% preliminary part counts as your ``weekly engagement''.
 \medskip 
 
 % Note the core, more advanced, part might include material you have not