if (exists($tags->{'WhiteClock'}) && exists($tags->{'BlackClock'})) {
$pos->{'white_clock'} = $tags->{'WhiteClock'};
$pos->{'black_clock'} = $tags->{'BlackClock'};
if (exists($tags->{'WhiteClock'}) && exists($tags->{'BlackClock'})) {
$pos->{'white_clock'} = $tags->{'WhiteClock'};
$pos->{'black_clock'} = $tags->{'BlackClock'};