chomp $line;
$line =~ tr/\r//d;
if ($line =~ /^<12> /) {
- my $pos = style12_to_fen($line);
+ my $pos = style12_to_pos($line);
# if this is already in the queue, ignore it
next if (defined($pos_waiting) && $pos->{'fen'} eq $pos_waiting->{'fen'});
}
}
-sub style12_to_fen {
+sub style12_to_pos {
my $str = shift;
my %pos = ();
my (@x) = split / /, $str;
$pos{'board'} = [ @x[1..8] ];
$pos{'toplay'} = $x[9];
-
+ $pos{'ep_file_num'} = $x[10];
+ $pos{'white_castle_k'} = $x[11];
+ $pos{'white_castle_q'} = $x[12];
+ $pos{'black_castle_k'} = $x[13];
+ $pos{'black_castle_q'} = $x[14];
+ $pos{'time_to_100move_rule'} = $x[15];
+ $pos{'move_num'} = $x[26];
+ $pos{'last_move'} = $x[29];
+ $pos{'fen'} = make_fen(\%pos);
+
+ return \%pos;
+}
+
+sub make_fen {
+ my $pos = shift;
+
# the board itself
- my (@board) = @x[1..8];
+ my (@board) = @{$pos->{'board'}};
for my $rank (0..7) {
$board[$rank] =~ s/(-+)/length($1)/ge;
}
# white/black to move
$fen .= " ";
- $fen .= lc($x[9]);
+ $fen .= lc($pos->{'toplay'});
# castling
my $castling = "";
- $castling .= "K" if ($x[11] == 1);
- $castling .= "Q" if ($x[12] == 1);
- $castling .= "k" if ($x[13] == 1);
- $castling .= "q" if ($x[14] == 1);
+ $castling .= "K" if ($pos->{'white_castle_k'} == 1);
+ $castling .= "Q" if ($pos->{'white_castle_q'} == 1);
+ $castling .= "k" if ($pos->{'black_castle_k'} == 1);
+ $castling .= "q" if ($pos->{'black_castle_q'} == 1);
$castling = "-" if ($castling eq "");
# $castling = "-"; # chess960
$fen .= " ";
# en passant
my $ep = "-";
- if ($x[10] != -1) {
- my $col = $x[10];
+ if ($pos->{'ep_file_num'} != -1) {
+ my $col = $pos->{'ep_file_num'};
my $nep = (qw(a b c d e f g h))[$col];
- if ($x[9] eq 'B') {
+ if ($pos->{'toplay'} eq 'B') {
$nep .= "3";
} else {
$nep .= "6";
# not, just lie -- it doesn't matter anyway. I'm unsure what's the
# "right" thing as per the standard, though.
#
- if ($x[9] eq 'B') {
- $ep = $nep if ($col > 0 && substr($pos{'board'}[4], $col-1, 1) eq 'p');
- $ep = $nep if ($col < 7 && substr($pos{'board'}[4], $col+1, 1) eq 'p');
+ if ($pos->{'toplay'} eq 'B') {
+ $ep = $nep if ($col > 0 && substr($pos->{'board'}[4], $col-1, 1) eq 'p');
+ $ep = $nep if ($col < 7 && substr($pos->{'board'}[4], $col+1, 1) eq 'p');
} else {
- $ep = $nep if ($col > 0 && substr($pos{'board'}[3], $col-1, 1) eq 'P');
- $ep = $nep if ($col < 7 && substr($pos{'board'}[3], $col+1, 1) eq 'P');
+ $ep = $nep if ($col > 0 && substr($pos->{'board'}[3], $col-1, 1) eq 'P');
+ $ep = $nep if ($col < 7 && substr($pos->{'board'}[3], $col+1, 1) eq 'P');
}
}
$fen .= " ";
# half-move clock
$fen .= " ";
- $fen .= $x[15];
+ $fen .= $pos->{'time_to_100move_rule'};
# full-move clock
$fen .= " ";
- $fen .= $x[26];
+ $fen .= $pos->{'move_num'};
- $pos{'fen'} = $fen;
- $pos{'move_num'} = $x[26];
- $pos{'last_move'} = $x[29];
+ return $fen;
+}
- return \%pos;
}
sub prettyprint_pv {