Solving Wordle with Bash and friends: Your own AI

wordle_solver.sh

#!/bin/bash

# List first 10 words
head wordle.dictionary

# List only words that does not contain letters 's' and 'e'
head wordle.dictionary | grep -P "[^se]{5}"

# List only words with 'a' in the 3rd position
head wordle.dictionary | grep "..a.."

# List only words with 't' but not in the last position
head wordle.dictionary | grep t | grep '[^.][^.][^.][^.][^t]'

# Combination of all three filters on whole dictionary
grep '..a..' wordle.dictionary \
  | grep t |  grep '[^.][^.][^.][^.][^t]' \
  | grep -P "[^se]{5}" \
  | wc -l

# Build assicative array of letter weights
declare -A weights_letters
while read -r line; do
    weights_letters["$(awk '{print $2}' <<< "${line}")"]="$(awk '{print $1}' <<< "${line}")"
done <<< "$(grep -o . wordle.dictionary | sort | uniq -c | sort -n)"

# Build assocative array of word weights
declare -A weights_words
while read -r word; do
    weight=0
    for letter in $(grep -o . <<< "${word}" | sort | uniq); do
        weight=$(("${weight}" + "${weights_letters[${letter}]}"))
    done
    weights_words["${word}"]="${weight}"
done < wordle.dictionary

# Solver settings for words that 
# - does not contain any of 'rose' letters
# - does contain 'a' but not on 1st position
sort -n <<< "$(
    while read -r word; do
        echo "${weights_words["${word}"]} ${word}"
    done <<< "$(
        grep '.....' wordle.dictionary \
            | grep a \
            | grep '[^a][^.][^.][^.][^.]' \
            | grep -P "[^rose]{5}"
    )"
)" | tail

# + 't' in the 1st position
# + 'i' not in the 2nd position
# + 'a' not in the 4th position
sort -n <<< "$(
    while read -r word; do
        echo "${weights_words["${word}"]} ${word}"
    done <<< "$(
        grep 't....' wordle.dictionary \
            | grep a | grep i \
            | grep '[^a][^i][^.][^a][^.]' \
            | grep -P "[^rosedl]{5}"
    )"
)" | tail

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