15 my ($chld_out, $chld_in);
16 my $pid = IPC::Open2::open2($chld_out, $chld_in, "../binlookup", "../open.mtbl", "40");
18 # Root position. Basically ignore everything except the opening (and later some root game stuff).
19 my $fen = $cgi->param('fen') // 'rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1';
20 my $pos = Position->from_fen($fen);
21 my $hex = unpack('H*', $pos->bitpacked_fen);
22 print $chld_in $hex, "\n";
23 chomp (my $line = <$chld_out>);
25 my ($white, $draw, $black, $opening_num, $white_avg_elo, $black_avg_elo, $num_elo, $timestamp, $pgn_file_number, $pgn_start_position, @moves) = split / /, $line;
31 white_avg_elo => $num_elo == 0 ? undef : $white_avg_elo * 1,
32 black_avg_elo => $num_elo == 0 ? undef : $black_avg_elo * 1,
33 num_elo => $num_elo * 1
36 my $opening = $openings{$opening_num} // 'A00: Start position';
40 die "Missing PGN position data." if (!defined($pgn_file_number) || !defined($pgn_start_position));
41 my $pgntext = read_root_pgn($pgn_file_number, $pgn_start_position);
42 my $pgn = Chess::PGN::Parse->new(undef, $pgntext);
43 $pgn->read_game() or die;
44 $pgn->parse_game() or die;
46 my $tags = $pgn->tags;
48 $root_game->{'white'} = $pgn->white;
49 $root_game->{'white_elo'} = $tags->{'WhiteElo'};
50 $root_game->{'black'} = $pgn->black;
51 $root_game->{'black_elo'} = $tags->{'BlackElo'};
52 $root_game->{'event'} = $pgn->event;
53 $root_game->{'date'} = $pgn->date;
54 $root_game->{'result'} = $pgn->result;
55 $root_game->{'eco'} = $pgn->eco;
56 $root_game->{'moves'} = int(((scalar @{$pgn->moves}) + 1) / 2);
59 # Explore one move out.
60 for my $move (@moves) {
61 my ($np, $uci_move) = $pos->make_pretty_move($move);
62 my $hex = unpack('H*', $np->bitpacked_fen);
63 print $chld_in $hex, "\n";
64 my $line = <$chld_out>;
65 my ($white, $draw, $black, $opening_num, $white_avg_elo, $black_avg_elo, $num_elo) = split / /, $line;
71 white_avg_elo => $num_elo == 0 ? undef : $white_avg_elo * 1,
72 black_avg_elo => $num_elo == 0 ? undef : $black_avg_elo * 1,
73 num_elo => $num_elo * 1
77 print $cgi->header(-type=>'application/json');
78 print JSON::XS::encode_json({ moves => \@json_moves, opening => $opening, root_game => $root_game });
81 open my $fh, "../openings.txt"
82 or die "../openings.txt: $!";
83 for my $line (<$fh>) {
85 my ($hash, $eco, $opening, $variation, $subvariation) = split /\t/, $line;
86 if ($variation eq '') {
87 $openings{$hash} = $eco . ": " . $opening;
89 $openings{$hash} = $eco . ": " . $opening . ": " . $variation;
97 open my $pgnnamesfh, "<", "../pgnnames.txt"
98 or die "../pgnnames.txt: $!";
99 while (<$pgnnamesfh>) {
105 if ($pgn_file_number > $#pgnnames) {
106 die "Unknown PGN file number $pgn_file_number";
110 open my $pgnfh, "<", "../" . $pgnnames[$pgn_file_number]
111 or die $pgnnames[$pgn_file_number] . ": $!";
112 sysseek($pgnfh, $pgn_start_position, 0)
113 or die "Could not seek to $pgn_start_position: $!";
114 sysread($pgnfh, $root_pgn, 32768)
115 or die "Could not read PGN from $pgn_start_position at $pgnnames[$pgn_file_number]: $!";
117 $root_pgn =~ s/^.*?(\[Event )/$1/s;
118 $root_pgn =~ s/^(.+?)\[Event .*/$1/s;