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 (Kelly Clarkson album) to support the album, which would begin in Hershey, Pennsylvania on July 11, 2015. "Heartbeat Song", the lead single from "Piece by Piece", was released on January 12, 2015. Receiving a positive response in its initial release, music critics described the track as a celebration of Clarkson's return to mainstream pop music. "Heartbeat Song" became a Top 40 hit on the "Billboard" Hot 100 chart, and attained Top 40 positions in almost every country singles chart it ranked in, including a top 10 position on the Official UK Singles Chart. Clarkson also announced intentions to commission dance remixes for "Take