Betza's funny notation ones. The notation is based on dividing moves that can be made on a board of squares into groups of symmetry-equivalent moves, the moves within a group differing only in the direction in which the step is taken. Each such group (referred to as "atom") is indicated by a capital, such as N for the 8 moves of the knight. The letter that represents the atom is usually the first letter of the simplest piece from current or historic chess variants that has this move, such as A and F for the alfil and ferz of shatranj (ancient Arabic/Persian chess).
Piece by Piece (film) The first segment of "Piece by Piece" lays out the fundamentals of San Francisco graffiti by documenting topics that laid the groundwork for artists today. Items covered are “Cholo” writing, the impact of PBS's "Style Wars" (1983), and the development of San Francisco's defined style. This segment includes not only San Francisco's graffiti originals, but also commentary from noted New York City writers such as Seen, Cope2 and Case2. It also covers the life and death of Dream One, a San Francisco graffiti pioneer and a vocal figurehead in Bay Area urban welfare activism. The second segment elaborates on what