String Theory: a Word Game’s Stacked mode builds on Classic mode. In Classic mode you could only drop a single letter in each space. Now in Stacked mode you have the ability to stack letters on top of other letters up to a maximum of three stacked letters on any space.
Once a space is full it will be shaded red, and you won’t be able to drop any more letters there, until you clear out the top letter by using it in a word. Stacking allows letters to be replaced, and adds another dimension to the game play.
Stacking a letter will decrease your score by the points associated with that letter. When you spell a word with the top letter in a stack, the top letter will be cleared allowing you to spell words with the next letter down.
Tip: Adding a letter over an already spelled word will “unspell” that word, and you won’t get those points when the words are scored.
Hint: Play Classic or Stacked modes 10 more times to unlock Clear the Board.
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