Glenn
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Not really. On every other instrument (well, not the other strings) there is usually only one place to play something. On some there are two or three places to play a few notes, but on the guitar you can play the fourth space in treble clef (E5) in six different places. That's as extreme as it gets, but on the piano that note only exists in one place. Most notes on the guitar can be played in at least three places, so picking which one is best for a given situation can be difficult at times, especially when all of the available fingerings are difficult.