diff --git a/day17/ex1-v1.bash b/day17/ex1-v1.bash
index e1a9576..afab4c6 100755
--- a/day17/ex1-v1.bash
+++ b/day17/ex1-v1.bash
@@ -9,28 +9,6 @@ declare -A life=()
 declare -i x=-1 y=-1 z=-1 res=0
 declare -i maxx maxy maxz
 
-function print_life() {
-	local -i x=0 y=0 z=0 foundx foundy
-	for ((z=0; z<maxz; ++z)); do
-		foundy=1
-		for ((y=0; y<maxy; ++y)); do
-			foundx=1
-			for ((x=0; x<maxx; ++x)); do
-				if [[ -v life[$x-$y-$z] ]]; then
-					#printf "%d-%d-%d:" $x $y $z
-					printf "%c" ${life["$x-$y-$z"]}
-					foundx=1
-				else
-					printf "%c" "."
-				fi
-			done
-			((foundx==1)) && foundy=1 && printf "\n"
-		done
-		((foundy==1)) && printf "z=%d\n\n" "$z"
-	done
-
-}
-
 function count_neighbors () {
 	local -i x=$1 y=$2 z=$3 x1 y1 z1 count=0
 	local str=""
@@ -49,7 +27,6 @@ function count_neighbors () {
 			done
 		done
 	done
-	#((count)) && printf "neighbours (%d, %d, %d)=%s\n" "$x" "$y" "$z" "$str" >&2
 	echo "$count"
 }
 
diff --git a/day17/ex1.bash b/day17/ex1.bash
index d5f3a8f..bf67211 100755
--- a/day17/ex1.bash
+++ b/day17/ex1.bash
@@ -7,34 +7,8 @@ CMD=${0##*/}
 
 declare -A life=()
 declare -i x=-1 y=-1 z=-1 res=0
-declare -i max
 declare -i loops=6
 
-function print_life() {
-	local -i x=0 y=0 z=0 foundx foundy
-	for ((z=0; z<max; ++z)); do
-		foundy=1
-		for ((y=0; y<max; ++y)); do
-			foundx=1
-			for ((x=0; x<max; ++x)); do
-				if [[ -v life["$x-$y-$z"] ]]; then
-					#printf "%d-%d-%d:" $x $y $z
-					if [[ ${life[$x-$y-$z]} != "#" ]]; then
-					   printf "error"
-					fi
-					printf "%c" "${life[$x-$y-$z]}"
-					foundx=1
-				else
-					printf "%c" "."
-				fi
-			done
-			((foundx==1)) && foundy=1 && printf "\n"
-		done
-		((foundy==1)) && printf "z=%d\n\n" "$z"
-	done
-
-}
-
 function run_cycle () {
 	local -i x y z count=0 x1 y1 z1 v
 	local -A lifetmp=()
@@ -42,6 +16,7 @@ function run_cycle () {
 
 
 	for k in "${!life[@]}"; do
+		# shellcheck disable=SC2206
 		values=(${k//-/ })
 		x=${values[0]}
 		y=${values[1]}
@@ -75,24 +50,8 @@ function run_cycle () {
 	done
 }
 
-function count_active () {
-	local k
-	local -i count=0
-
-	for k in "${!life[@]}"; do
-		if [[ ${life[$k]} == "#" ]]; then
-			((count++))
-		fi
-	done
-	echo "$count"
-}
-
 x=$loops; y=$loops; z=$loops
-
 while read -r line; do
-	if ((y==loops)); then						  # 1st line
-		((max=loops+${#line}+loops+1))
-	fi
 	for ((j=0; j<${#line}; ++j)); do
 		((curx=x+j))
 		c=${line:j:1}
@@ -105,7 +64,6 @@ done
 for ((i=0; i<6; ++i)); do
 	run_cycle
 done
-#echo "================================="
 res=${#life[@]}
 
 printf "%s : res=%d\n" "$CMD" "$res"
diff --git a/day17/ex2.bash b/day17/ex2.bash
index f3b5897..a15a397 100755
--- a/day17/ex2.bash
+++ b/day17/ex2.bash
@@ -1,6 +1,6 @@
 #!/bin/bash
 #
-# ex1.bash: Advent2020 game, day 17/game 1.
+# ex1.bash: Advent2020 game, day 17/game 2.
 
 CMD=${0##*/}
 #shopt -s extglob