Barre chors (also known as bar chords, but more commonly spelled as "barre") are a type of guitar chord where one or more fingers are used to press down multiple strings across the guitar fingerboard (like a bar pressing down the strings). Barring the strings enables the guitarist to play a chord not restricted by the tones of the guitar's open strings. Barre chords are often referred to as "moveable" chords, as they can be moved up and down the neck as needed. They are commonly used in most popular and classical music and are frequently used in combination with "open" or standard guitar chords. Frequently referred to as "jazz" chords, they are typically used for more complex chord voicings and playing in keys not suitable for the more basic open chords of the first position of a standard-tuned guitar.