header revision:u player1_playing:b 
&CHESS_FILE_PLAYER name line:u col:u king_moved:b left_rook_moved:b right_rook_moved:b en_passant_line:u en_passant_col:u
players player1:U{CHESS_FILE_PLAYER} player2:U{CHESS_FILE_PLAYER}
&CHESS_FILE_PLAYER2 name line:u col:u king_moved:b left_rook_moved:b right_rook_moved:b en_passant_line:u en_passant_col:u lastmove_line:u lastmove_col:u
players2 player1:U{CHESS_FILE_PLAYER2} player2:U{CHESS_FILE_PLAYER2}
cells cells:uv
&CHESS_FILE_UNDO p1_playing:b line:u col:u cell:u type:e{CHESS_UNDO_TYPE}
undo undos:U{CHESS_FILE_UNDO}v
session session reverse:b
chat lines:v
&CHESS_CHAT time:u line
chat2 lines:U{CHESS_CHAT}v
gameinfo gamename timer
gameinfo2 gamename timer robotskill:u