phase3.diff

--- bad
+++ good
@@ -1,9 +1,10 @@
 def guess(board)
   words = candidate_words
-  letters = (words.join('').split('') - @wrong_guesses - @guessed_hash.keys)
-  letters.group_by { |letter| letter }.max_by(&:size).first
+  letters = (words.join('').split('') - @wrong_guesses - @guessed_hash.keys - board)
+  letters.max_by &letters.method(:count)
 end

 def handle_response(letter, idxs)
-  idxs == [] ? @wrong_guesses << letter : @guessed_hash[letter] = idxs
+  @guessed_hash[letter] = idxs
+  @wrong_guesses << letter if idxs.empty?
 end