$pos->{'player_w'} = $white;
$pos->{'player_b'} = $black;
$pos->{'start_fen'} = $tags->{'FEN'};
$pos->{'player_w'} = $white;
$pos->{'player_b'} = $black;
$pos->{'start_fen'} = $tags->{'FEN'};
my $halfmove_num = 0;
for my $move (@{$pos_calculating->{'history'}}) {
my $id = id_for_pos($pos, $halfmove_num);
my $halfmove_num = 0;
for my $move (@{$pos_calculating->{'history'}}) {
my $id = id_for_pos($pos, $halfmove_num);