question: private static boolean addBookLine ( String line , List < Byte > binBook ) throws ChessParseError { Position pos = TextIO . readFEN ( TextIO . startPosFEN ) ; UndoInfo ui = new UndoInfo ( ) ; String [ ] strMoves = line . split ( " " ) ; for ( String strMove : strMoves ) { int bad = 0 ; if ( strMove . endsWith ( "?" ) ) { strMove = strMove . substring ( 0 , strMove . length ( ) - 1 ) ; bad = 1 ; } Move m = TextIO . stringToMove ( pos , strMove ) ; if ( m == null ) { return false ; } int prom = pieceToProm ( m . promoteTo ) ; int val = m . from + ( m . to << 6 ) + ( prom << 12 ) + ( bad << 15 ) ; binBook . add ( ( byte ) ( val > > 8 ) ) ; binBook . add ( ( byte ) ( val & 255 ) ) ; pos . makeMove ( m , ui ) ; } binBook . add ( ( byte ) 0 ) ; binBook . add ( ( byte ) 0 ) ; return true ; }
target:  Add a sequence of moves, starting from the initial position, to the binary opening book. 