/* delete header to get the moves */
var ms = pgn.replace(header_string, '').replace(new RegExp(mask(newline_char), 'g'), ' ');
/* delete comments */
ms = ms.replace(/(\{[^}]+\})+?/g, '');
/* delete header to get the moves */
var ms = pgn.replace(header_string, '').replace(new RegExp(mask(newline_char), 'g'), ' ');
/* delete comments */
ms = ms.replace(/(\{[^}]+\})+?/g, '');