diff --git a/2020/Makefile b/2020/Makefile
index b2efaf9d0..d39b84917 100644
--- a/2020/Makefile
+++ b/2020/Makefile
@@ -1,61 +1,52 @@
 #!/usr/bin/env make
 #
-# 2020 makefile
+# 2020 Makefile
+
+################################################################################
 #
-# This work by Landon Curt Noll, Simon Cooper, and Leonid A. Broukhis
-# is licensed under:
+# Regarding individual entries:
+#
+# IOCCC winning entry code may not work on your system.  Even with standards,
+# conditions and build environments change, especially when it comes to more
+# extreme code such you might find in an IOCCC winner.  Moreover, what was
+# allowed and liked in one IOCCC contest may no longer be liked/allowed in
+# later IOCCC years.
+#
+# Corrections on winning author and fixing typos in remarks are VERY WELCOME.
+#
+# GitHub pull requests are welcome:
+#
+# If you have a patch that might make running an entry work in modern Unix-like
+# environments, please create a GitHub pull request for the IOCCC judges to
+# consider.
+#
+# Suggestions and corrections regarding Makefiles, winning author information,
+# fixing typos in remarks, and code patches are welcome via opening a GitHub
+# issue or better yet, by creating a GitHub pull request for the IOCCC judges
+# to consider.  To form a GitHub issue or GitHub pull, please visit:
+#
+# https://github.com/ioccc-src/winner
+#
+################################################################################
+
+# This work by Landon Curt Noll and Leonid A. Broukhis is licensed under:
 #
 #	Creative Commons Attribution-ShareAlike 3.0 Unported License.
 #
 # See: http://creativecommons.org/licenses/by-sa/3.0/
 
 
-################
-# tool locations
-################
+#############################
+# shell used by this Makefile
+#############################
 #
-SHELL= /bin/bash
-#
-BUNZIP2= bunzip2
-BZIP2= bzip2
-CP= cp
-CPP= cpp
-CURL= curl
-DD= dd
-ECHO= echo
-GREP= grep
-GUNZIP= gunzip
-GZIP_PROG= gzip
-LD= ld
-MAKE= make
-MKDIR= mkdir
-MV= mv
-RM= rm
-SED= sed
-SORT= sort
-STRIP= strip
-TAR= tar
-TR= tr
-TRUE= true
-UNIQ= uniq
+SHELL= bash
 
-# Set X11_LIBDIR to the directory where the X11 library resides
+#######################
+# common tool locations
+#######################
 #
-#X11_LIBDIR= /usr/X11R6/lib
-#X11_LIBDIR= /usr/X11/lib
-X11_LIBDIR= /opt/X11/lib
-
-# Set X11_INCLUDEDIR to the directory where the X11 include files reside
-#
-#X11_INCDIR= /usr/X11R6/include
-#X11_INCDIR= /usr/X11/include
-X11_INCDIR= /opt/X11/include
-
-# ANSI compiler
-#
-# Set CC to the name of your ANSI compiler.
-#
-CC= cc
+include ../var.mk
 
 
 ###############
@@ -65,55 +56,122 @@ CC= cc
 WINNERS= burton carlini endoh1 endoh2 endoh3 ferguson1 ferguson2 giles \
 	 kurdyukov1 kurdyukov2 kurdyukov3 kurdyukov4 otterness tsoj yang
 
+YEAR= 2020
 
 ###################
 # build all entries
 ###################
 #
 all:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
 	@for i in ${WINNERS} ; do \
-	    echo "(cd $$i && $(MAKE) X11_LIBDIR=${X11_LIBDIR} X11_INCDIR=${X11_INCDIR} $@)"; \
-	    (cd $$i && $(MAKE) "X11_LIBDIR=${X11_LIBDIR}" "X11_INCDIR=${X11_INCDIR}" $@); \
+	    echo "=-= start ${YEAR}/$$i =-="; \
+	    echo "(cd $$i && $(MAKE) $@)"; \
+	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
 	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
+
+.PHONY: all alt data everything clean clobber install \
+        love haste waste maker easter_egg sandwich \
+        supernova deep_magic magic charon pluto
 
 # alternative executable
 #
 alt:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
 	@for i in ${WINNERS} ; do \
-	    echo "(cd $$i && $(MAKE) X11_LIBDIR=${X11_LIBDIR} X11_INCDIR=${X11_INCDIR} $@)"; \
-	    (cd $$i && $(MAKE) "X11_LIBDIR=${X11_LIBDIR}" "X11_INCDIR=${X11_INCDIR}" $@); \
+	    echo "=-= start ${YEAR}/$$i =-="; \
+	    echo "(cd $$i && $(MAKE) $@)"; \
+	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
 	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
+
+# data files
+#
+data:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
+	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
+	    echo "(cd $$i && $(MAKE) $@)"; \
+	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
+	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
+
+# both all and alt
+#
+everything:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
+	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
+	    echo "(cd $$i && $(MAKE) $@)"; \
+	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
+	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
 
 
 ###############
 # utility rules
 ###############
 #
-everything: all alt
-
 clean:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
 	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
 	    echo "(cd $$i && $(MAKE) $@)"; \
 	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
 	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
 
 clobber:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
 	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
 	    echo "(cd $$i && $(MAKE) $@)"; \
 	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
 	done
-
-nuke: clobber
-	@for i in ${WINNERS} ; do \
-	    echo "(cd $$i && $(MAKE) $@)"; \
-	    (cd $$i && $(MAKE) $@); \
-	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
 
 install:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
 	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
 	    echo "(cd $$i && $(MAKE) $@)"; \
 	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
 	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
+
+indent.c:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
+	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
+	    echo "(cd $$i && $(MAKE) $@)"; \
+	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
+	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
 
 
 ##################
@@ -121,58 +179,136 @@ install:
 ##################
 #
 love:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
 	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
 	    echo "(cd $$i && $(MAKE) $@)"; \
 	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
 	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
 
 haste:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
 	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
 	    echo "(cd $$i && $(MAKE) $@)"; \
 	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
 	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
 
 waste:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
 	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
 	    echo "(cd $$i && $(MAKE) $@)"; \
 	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
 	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
 
-make:
+maker:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
 	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
 	    echo "(cd $$i && $(MAKE) $@)"; \
 	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
 	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
 
 easter_egg:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
 	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
 	    echo "(cd $$i && $(MAKE) $@)"; \
 	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
 	done
-
-fabricate fashion form frame manufacture produce:
-	@for i in ${WINNERS} ; do \
-	    echo "(cd $$i && $(MAKE) $@)"; \
-	    (cd $$i && $(MAKE) $@); \
-	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
 
 sandwich:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
 	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
 	    echo "(cd $$i && $(MAKE) $@)"; \
 	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
 	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
 
 
 # The IOCCC resident astronomer states
 #
-charon: supernova
+supernova:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
 	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
 	    echo "(cd $$i && $(MAKE) $@)"; \
 	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
 	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
 
-pluto: supernova
+deep_magic:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
 	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
 	    echo "(cd $$i && $(MAKE) $@)"; \
 	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
 	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
+
+magic:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
+	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
+	    echo "(cd $$i && $(MAKE) $@)"; \
+	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
+	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
+
+charon:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
+	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
+	    echo "(cd $$i && $(MAKE) $@)"; \
+	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
+	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
+
+pluto:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
+	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
+	    echo "(cd $$i && $(MAKE) $@)"; \
+	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
+	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='