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;
26 my $opening = $openings{$opening_num} // 'A00: Start position';
30 die "Missing PGN position data." if (!defined($pgn_file_number) || !defined($pgn_start_position));
31 my $pgntext = read_root_pgn($pgn_file_number, $pgn_start_position);
32 my $pgn = Chess::PGN::Parse->new(undef, $pgntext);
33 $pgn->read_game() or die;
34 $pgn->parse_game() or die;
36 my $tags = $pgn->tags;
38 $root_game->{'white'} = $pgn->white;
39 $root_game->{'white_elo'} = $tags->{'WhiteElo'};
40 $root_game->{'black'} = $pgn->black;
41 $root_game->{'black_elo'} = $tags->{'BlackElo'};
42 $root_game->{'event'} = $pgn->event;
43 $root_game->{'date'} = $pgn->date;
44 $root_game->{'result'} = $pgn->result;
45 $root_game->{'eco'} = $pgn->eco;
46 $root_game->{'moves'} = scalar @{$pgn->moves};
49 # Explore one move out.
51 for my $move (@moves) {
52 my ($np, $uci_move) = $pos->make_pretty_move($move);
53 my $hex = unpack('H*', $np->bitpacked_fen);
54 print $chld_in $hex, "\n";
55 my $line = <$chld_out>;
56 my ($white, $draw, $black, $opening_num, $white_avg_elo, $black_avg_elo, $num_elo) = split / /, $line;
62 white_avg_elo => $white_avg_elo * 1,
63 black_avg_elo => $black_avg_elo * 1,
64 num_elo => $num_elo * 1
68 print $cgi->header(-type=>'application/json');
69 print JSON::XS::encode_json({ moves => \@json_moves, opening => $opening, root_game => $root_game });
73 return $x->{'white'} + $x->{'draw'} + $x->{'black'};
77 open my $fh, "../openings.txt"
78 or die "../openings.txt: $!";
79 for my $line (<$fh>) {
81 my ($hash, $eco, $opening, $variation, $subvariation) = split /\t/, $line;
82 if ($variation eq '') {
83 $openings{$hash} = $eco . ": " . $opening;
85 $openings{$hash} = $eco . ": " . $opening . ": " . $variation;
93 open my $pgnnamesfh, "<", "../pgnnames.txt"
94 or die "../pgnnames.txt: $!";
95 while (<$pgnnamesfh>) {
101 if ($pgn_file_number > $#pgnnames) {
102 die "Unknown PGN file number $pgn_file_number";
106 open my $pgnfh, "<", "../" . $pgnnames[$pgn_file_number]
107 or die $pgnnames[$pgn_file_number] . ": $!";
108 sysseek($pgnfh, $pgn_start_position, 0)
109 or die "Could not seek to $pgn_start_position: $!";
110 sysread($pgnfh, $root_pgn, 32768)
111 or die "Could not read PGN from $pgn_start_position at $pgnnames[$pgn_file_number]: $!";
113 $root_pgn =~ s/^.*?(\[Event )/$1/s;
114 $root_pgn =~ s/^(.+?)\[Event .*/$1/s;