HB HB At least, that one is an easy enough derivation to visualize from the original diamond, with the depth of the fullback inverted with respect to the halves. However, some formations have placed the heavy back even more starkly forward, to function as a blocker for the running backs. In the diagram below of the V formation used by Dartmouth College in the 1950s, the respective position names have been rationalized as "BB" (a not-very-popular designation, "blocking back") and RB: E T G C G T E QB BB RB RB (The running and blocking backs can be seen to form a letter V.) However, in its time the running backs were known as halfbacks and the blocking back as fullback. Another such example is the I formation, shown below in a with-wingback version: WR T G C G T TE WB QB FB TB The diagram shows the more geometrically rational designation of tailback behind the fullback. However, some would label the deepest back in this form of deuce backfield "HB", considering one halfback to have moved behind the fullback, who is in both the role of blocking back and the heavy up-the-middle runner. Those who would emphasize the blocking role of the FB (the "up back") might even label the deepest back, "RB", with a BB instead of FB. Few, however, would use the straightforwardly geometric labels of QB, HB, and FB in that order from front to back. The wingback is on the wing of a tackle rather than an end. This is accepted nomenclature where an end is split ("WR" above). The wingback is just behind and outside of the "interior lineman" (line player other than end). However, it is not uncommon for a wingback to be outside the tight end in an I or other formation where the opposite end is split. In the power I formation, instead of the wingback shown above, there is another deep back in the traditional halfback position. That position in the power I is probably called "halfback" more than any other name. In the triple I, where all the backs are in one line perpendicular to the lines of scrimmage, one could hope for the backs to be called quarter-, half-, full-, and tailback in order of depth, but various names are probably used. The diagram below of an "ace" formation deliberately mixes terms/symbols for wide receivers: E