hard mode now check all previous rounds for yellow placement

wordle

@@ -27,6 +27,7 @@ declare -gr INDENT=$'\e[1C'
 function main() {
   declare -g ANSWER
   declare -g POOL='QWERTYUIOPASDFGHJKLZXCVBNM'
+  declare -Ag YELLOWS
   ANSWER=$(select_random_word)
 
   set_options "$@"
@@ -172,6 +173,7 @@ function retrive_guess() {
   [[ ${valid_guess} == 3 ]] && GUESS=$(retrive_guess "GREEN Issue")
   [[ ${valid_guess} == 4 ]] && GUESS=$(retrive_guess "YELLOW Issue")
   [[ ${valid_guess} == 5 ]] && GUESS=$(retrive_guess "POOL Issue")
+  [[ ${valid_guess} == 6 ]] && GUESS=$(retrive_guess "NEW Issue")
 
   echo -n "${GUESS^^}"
 }
@@ -220,25 +222,21 @@ function hard_mode_check() {
     fi
     
     if [[ -n "${yellows[i]}" ]]; then
-      [[ "${yellows[i]}" == "${GUESS:i:1}" ]] && return 4
+      [[ ! "${GUESS}" == *"${yellows[i]}"* ]] && return 4
     fi
 
+    for (( r=row-1; r>=0; r-- )); do
+      CHAR="${GUESS:i:1}"
+      PREV_CHAR="${YELLOWS[$r,$i]}"
+      [[ "${CHAR}" == "${PREV_CHAR}" ]] && return 4
+    done
   done
 
+
+
   return 0
 }
 
-function color_check() {
-  declare -r CHAR=$1
-  declare -r c=$2
-  declare -r r=$(( row-1 ))
-
-  PREV_ROW="${BOARD[$r,$c]}"
-  PREV_CHAR="${PREV_ROW: -2:1}"
-
-  [[ "${CHAR}" == "${PREV_CHAR}" ]] && return 0 || return 1
-}
-
 function check_guess() {
   declare -r _guess=$1
   declare -r _row=$2
@@ -266,7 +264,8 @@ function check_guess() {
 
     if [[ "${chars}" == *${_char}* ]]; then
       chars="${chars/${_char}/}"
-      yellows[c]="${_char}"
+      yellows[c]="${_char}"         # volatile - stores previous row yellows
+      YELLOWS[$_row,$c]="${_char}"  # stores all yellow from all rounds
       BOARD[$_row,$c]="${BOLD}${LETTER}${YELLOW} ${_char} "
     else
       POOL="${POOL/${_char}/_}"