use IPC::Open2;
use Time::HiRes;
use JSON::XS;
+use URI::Escape;
require 'Position.pm';
require 'Engine.pm';
+require 'config.pm';
use strict;
use warnings;
-
-# Configuration
-my $server = "freechess.org";
-my $target = "GMCarlsen";
-my $engine_cmdline = "'./Deep Rybka 4 SSE42 x64'";
-my $engine2_cmdline = "./stockfish_13111119_x64_modern_sse42"; # undef for none
-my $uci_assume_full_compliance = 0; # dangerous :-)
-my $update_max_interval = 1.0;
-my @masters = (
- 'Sesse',
- 'Sessse',
- 'Sesssse',
- 'greatestguns',
- 'beuki'
-);
+no warnings qw(once);
# Program starts here
-$SIG{ALRM} = sub { output(); };
my $latest_update = undef;
+my $output_timer = undef;
my $http_timer = undef;
+my $stop_pgn_fetch = 0;
+my $tb_retry_timer = undef;
+my %tb_cache = ();
+my $tb_lookup_running = 0;
$| = 1;
print UCILOG "Log starting.\n";
select(UCILOG);
$| = 1;
+
+open(TBLOG, ">tblog.txt")
+ or die "tblog.txt: $!";
+print TBLOG "Log starting.\n";
+select(TBLOG);
+$| = 1;
+
select(STDOUT);
# open the chess engine
-my $engine = open_engine($engine_cmdline, 'E1', sub { handle_uci(@_, 1); });
-my $engine2 = open_engine($engine2_cmdline, 'E2', sub { handle_uci(@_, 0); });
+my $engine = open_engine($remoteglotconf::engine_cmdline, 'E1', sub { handle_uci(@_, 1); });
+my $engine2 = open_engine($remoteglotconf::engine2_cmdline, 'E2', sub { handle_uci(@_, 0); });
my $last_move;
my $last_text = '';
my ($pos_waiting, $pos_calculating, $pos_calculating_second_engine);
uciprint($engine, "setoption name UCI_AnalyseMode value true");
-# uciprint($engine, "setoption name NalimovPath value /srv/tablebase");
-uciprint($engine, "setoption name NalimovUsage value Rarely");
-uciprint($engine, "setoption name Hash value 1024");
-# uciprint($engine, "setoption name MultiPV value 2");
+while (my ($key, $value) = each %remoteglotconf::engine_config) {
+ uciprint($engine, "setoption name $key value $value");
+}
uciprint($engine, "ucinewgame");
if (defined($engine2)) {
uciprint($engine2, "setoption name UCI_AnalyseMode value true");
- # uciprint($engine2, "setoption name NalimovPath value /srv/tablebase");
- uciprint($engine2, "setoption name NalimovUsage value Rarely");
- uciprint($engine2, "setoption name Hash value 1024");
- uciprint($engine2, "setoption name Threads value 8");
+ while (my ($key, $value) = each %remoteglotconf::engine2_config) {
+ uciprint($engine2, "setoption name $key value $value");
+ }
uciprint($engine2, "setoption name MultiPV value 500");
uciprint($engine2, "ucinewgame");
}
# now talk to FICS
my $t = Net::Telnet->new(Timeout => 10, Prompt => '/fics% /');
$t->input_log(\*FICSLOG);
-$t->open($server);
-$t->print("SesseBOT");
+$t->open($remoteglotconf::server);
+$t->print($remoteglotconf::nick);
$t->waitfor('/Press return to enter the server/');
$t->cmd("");
$t->cmd("set shout 0");
$t->cmd("set seek 0");
$t->cmd("set style 12");
-$t->cmd("observe $target");
-print "FICS ready.\n";
my $ev1 = AnyEvent->io(
fh => fileno($t),
}
}
);
+if (defined($remoteglotconf::target)) {
+ if ($remoteglotconf::target =~ /^http:/) {
+ fetch_pgn($remoteglotconf::target);
+ } else {
+ $t->cmd("observe $remoteglotconf::target");
+ }
+}
+print "FICS ready.\n";
+
# Engine events have already been set up by Engine.pm.
EV::run;
sub handle_uci {
my ($engine, $line, $primary) = @_;
+ return if $line =~ /(upper|lower)bound/;
+
$line =~ s/ / /g; # Sometimes needed for Zappa Mexico
print UCILOG localtime() . " $engine->{'tag'} <= $line\n";
if ($line =~ /^info/) {
}
if ($line =~ /^bestmove/) {
if ($primary) {
- return if (!$uci_assume_full_compliance);
+ return if (!$remoteglotconf::uci_assume_full_compliance);
if (defined($pos_waiting)) {
uciprint($engine, "position fen " . $pos_waiting->fen());
uciprint($engine, "go infinite");
output();
}
+my $getting_movelist = 0;
+my $pos_for_movelist = undef;
+my @uci_movelist = ();
+my @pretty_movelist = ();
+
sub handle_fics {
my $line = shift;
if ($line =~ /^<12> /) {
handle_position(Position->new($line));
+ $t->cmd("moves");
+ }
+ if ($line =~ /^Movelist for game /) {
+ my $pos = $pos_waiting // $pos_calculating;
+ if (defined($pos)) {
+ @uci_movelist = ();
+ @pretty_movelist = ();
+ $pos_for_movelist = Position->start_pos($pos->{'player_w'}, $pos->{'player_b'});
+ $getting_movelist = 1;
+ }
+ }
+ if ($getting_movelist &&
+ $line =~ /^\s* \d+\. \s+ # move number
+ (\S+) \s+ \( [\d:.]+ \) \s* # first move, then time
+ (?: (\S+) \s+ \( [\d:.]+ \) )? # second move, then time
+ /x) {
+ eval {
+ my $uci_move;
+ ($pos_for_movelist, $uci_move) = $pos_for_movelist->make_pretty_move($1);
+ push @uci_movelist, $uci_move;
+ push @pretty_movelist, $1;
+
+ if (defined($2)) {
+ ($pos_for_movelist, $uci_move) = $pos_for_movelist->make_pretty_move($2);
+ push @uci_movelist, $uci_move;
+ push @pretty_movelist, $2;
+ }
+ };
+ if ($@) {
+ warn "Error when getting FICS move history: $@";
+ $getting_movelist = 0;
+ }
+ }
+ if ($getting_movelist &&
+ $line =~ /^\s+ \{.*\} \s+ (?: \* | 1\/2-1\/2 | 0-1 | 1-0 )/x) {
+ # End of movelist.
+ for my $pos ($pos_waiting, $pos_calculating) {
+ next if (!defined($pos));
+ if ($pos->fen() eq $pos_for_movelist->fen()) {
+ $pos->{'pretty_history'} = \@pretty_movelist;
+ }
+ }
+ $getting_movelist = 0;
}
if ($line =~ /^([A-Za-z]+)(?:\([A-Z]+\))* tells you: (.*)$/) {
my ($who, $msg) = ($1, $2);
- next if (grep { $_ eq $who } (@masters) == 0);
+ next if (grep { $_ eq $who } (@remoteglotconf::masters) == 0);
if ($msg =~ /^fics (.*?)$/) {
$t->cmd("tell $who Executing '$1' on FICS.");
} elsif ($msg =~ /^pgn (.*?)$/) {
my $url = $1;
$t->cmd("tell $who Starting to poll '$url'.");
- AnyEvent::HTTP::http_get($url, sub {
- handle_pgn(@_, $url);
- });
+ fetch_pgn($url);
} elsif ($msg =~ /^stoppgn$/) {
$t->cmd("tell $who Stopping poll.");
+ $stop_pgn_fetch = 1;
$http_timer = undef;
} elsif ($msg =~ /^quit$/) {
$t->cmd("tell $who Bye bye.");
#print "FICS: [$line]\n";
}
+# Starts periodic fetching of PGNs from the given URL.
+sub fetch_pgn {
+ my ($url) = @_;
+ AnyEvent::HTTP::http_get($url, sub {
+ handle_pgn(@_, $url);
+ });
+}
+
+my ($last_pgn_white, $last_pgn_black);
+my @last_pgn_uci_moves = ();
+my $pgn_hysteresis_counter = 0;
+
sub handle_pgn {
my ($body, $header, $url) = @_;
+
+ if ($stop_pgn_fetch) {
+ $stop_pgn_fetch = 0;
+ $http_timer = undef;
+ return;
+ }
+
my $pgn = Chess::PGN::Parse->new(undef, $body);
if (!defined($pgn) || !$pgn->read_game()) {
warn "Error in parsing PGN from $url\n";
} else {
- $pgn->quick_parse_game;
- my $pos = Position->start_pos($pgn->white, $pgn->black);
- my $moves = $pgn->moves;
- for my $move (@$moves) {
- my ($from_row, $from_col, $to_row, $to_col, $promo) = $pos->parse_pretty_move($move);
- $pos = $pos->make_move($from_row, $from_col, $to_row, $to_col, $promo);
+ eval {
+ $pgn->quick_parse_game;
+ my $pos = Position->start_pos($pgn->white, $pgn->black);
+ my $moves = $pgn->moves;
+ my @uci_moves = ();
+ for my $move (@$moves) {
+ my $uci_move;
+ ($pos, $uci_move) = $pos->make_pretty_move($move);
+ push @uci_moves, $uci_move;
+ }
+ $pos->{'pretty_history'} = $moves;
+
+ # Sometimes, PGNs lose a move or two for a short while,
+ # or people push out new ones non-atomically.
+ # Thus, if we PGN doesn't change names but becomes
+ # shorter, we mistrust it for a few seconds.
+ my $trust_pgn = 1;
+ if (defined($last_pgn_white) && defined($last_pgn_black) &&
+ $last_pgn_white eq $pgn->white &&
+ $last_pgn_black eq $pgn->black &&
+ scalar(@uci_moves) < scalar(@last_pgn_uci_moves)) {
+ if (++$pgn_hysteresis_counter < 3) {
+ $trust_pgn = 0;
+ }
+ }
+ if ($trust_pgn) {
+ $last_pgn_white = $pgn->white;
+ $last_pgn_black = $pgn->black;
+ @last_pgn_uci_moves = @uci_moves;
+ $pgn_hysteresis_counter = 0;
+ handle_position($pos);
+ }
+ };
+ if ($@) {
+ warn "Error in parsing moves from $url\n";
}
- handle_position($pos);
}
$http_timer = AnyEvent->timer(after => 1.0, cb => sub {
- AnyEvent::HTTP::http_get($url, sub {
- handle_pgn(@_, $url);
- });
+ fetch_pgn($url);
});
}
if (!defined($pos_waiting)) {
uciprint($engine, "stop");
}
- if ($uci_assume_full_compliance) {
+ if ($remoteglotconf::uci_assume_full_compliance) {
$pos_waiting = $pos;
} else {
uciprint($engine, "position fen " . $pos->fen());
$engine->{'info'} = {};
$last_move = time;
+ schedule_tb_lookup();
+
#
# Output a command every move to note that we're
# still paying attention -- this is a good tradeoff,
# Search for "multipv" first of all, since e.g. Stockfish doesn't put it first.
for my $i (0..$#x - 1) {
- if ($x[$i] =~ 'multipv') {
+ if ($x[$i] eq 'multipv') {
$mpv = $x[$i + 1];
next;
}
}
while (scalar @x > 0) {
- if ($x[0] =~ 'multipv') {
+ if ($x[0] eq 'multipv') {
# Dealt with above
shift @x;
shift @x;
next;
}
- if ($x[0] =~ /^(currmove|currmovenumber|cpuload)$/) {
+ if ($x[0] eq 'currmove' || $x[0] eq 'currmovenumber' || $x[0] eq 'cpuload') {
my $key = shift @x;
my $value = shift @x;
$info->{$key} = $value;
next;
}
- if ($x[0] =~ /^(depth|seldepth|hashfull|time|nodes|nps|tbhits)$/) {
+ if ($x[0] eq 'depth' || $x[0] eq 'seldepth' || $x[0] eq 'hashfull' ||
+ $x[0] eq 'time' || $x[0] eq 'nodes' || $x[0] eq 'nps' ||
+ $x[0] eq 'tbhits') {
my $key = shift @x;
my $value = shift @x;
$info->{$key . $mpv} = $value;
delete $info->{'score_cp' . $mpv};
delete $info->{'score_mate' . $mpv};
- while ($x[0] =~ /^(cp|mate|lowerbound|upperbound)$/) {
+ while ($x[0] eq 'cp' || $x[0] eq 'mate') {
if ($x[0] eq 'cp') {
shift @x;
$info->{'score_cp' . $mpv} = shift @x;
}
}
-sub prettyprint_pv {
+sub prettyprint_pv_no_cache {
my ($board, @pvs) = @_;
if (scalar @pvs == 0 || !defined($pvs[0])) {
my $pv = shift @pvs;
my ($from_col, $from_row, $to_col, $to_row, $promo) = parse_uci_move($pv);
my ($pretty, $nb) = $board->prettyprint_move($from_row, $from_col, $to_row, $to_col, $promo);
- return ($pretty, prettyprint_pv($nb, @pvs));
+ return ( $pretty, prettyprint_pv_no_cache($nb, @pvs) );
+}
+
+sub prettyprint_pv {
+ my ($pos, @pvs) = @_;
+
+ my $cachekey = join('', @pvs);
+ if (exists($pos->{'prettyprint_cache'}{$cachekey})) {
+ return @{$pos->{'prettyprint_cache'}{$cachekey}};
+ } else {
+ my @res = prettyprint_pv_no_cache($pos->{'board'}, @pvs);
+ $pos->{'prettyprint_cache'}{$cachekey} = \@res;
+ return @res;
+ }
}
sub output {
# Don't update too often.
my $age = Time::HiRes::tv_interval($latest_update);
- if ($age < $update_max_interval) {
- Time::HiRes::alarm($update_max_interval + 0.01 - $age);
+ if ($age < $remoteglotconf::update_max_interval) {
+ my $wait = $remoteglotconf::update_max_interval + 0.01 - $age;
+ $output_timer = AnyEvent->timer(after => $wait, cb => \&output);
return;
}
my $info = $engine->{'info'};
+
+ #
+ # If we have tablebase data from a previous lookup, replace the
+ # engine data with the data from the tablebase.
+ #
+ my $fen = $pos_calculating->fen();
+ if (exists($tb_cache{$fen})) {
+ for my $key (qw(pv score_cp score_mate nodes nps depth seldepth tbhits)) {
+ delete $info->{$key . '1'};
+ delete $info->{$key};
+ }
+ $info->{'nodes'} = 0;
+ $info->{'nps'} = 0;
+ $info->{'depth'} = 0;
+ $info->{'seldepth'} = 0;
+ $info->{'tbhits'} = 0;
+
+ my $t = $tb_cache{$fen};
+ my $pv = $t->{'pv'};
+ my $matelen = int((1 + $t->{'score'}) / 2);
+ if ($t->{'result'} eq '1/2-1/2') {
+ $info->{'score_cp'} = 0;
+ } elsif ($t->{'result'} eq '1-0') {
+ if ($pos_calculating->{'toplay'} eq 'B') {
+ $info->{'score_mate'} = -$matelen;
+ } else {
+ $info->{'score_mate'} = $matelen;
+ }
+ } else {
+ if ($pos_calculating->{'toplay'} eq 'B') {
+ $info->{'score_mate'} = $matelen;
+ } else {
+ $info->{'score_mate'} = -$matelen;
+ }
+ }
+ $info->{'pv'} = $pv;
+ $info->{'tablebase'} = 1;
+ } else {
+ $info->{'tablebase'} = 0;
+ }
#
# Some programs _always_ report MultiPV, even with only one PV.
eval {
my $dummy;
if (exists($info->{'pv'})) {
- $dummy = prettyprint_pv($pos_calculating->{'board'}, @{$info->{'pv'}});
+ $dummy = prettyprint_pv($pos_calculating, @{$info->{'pv'}});
}
my $mpv = 1;
while (exists($info->{'pv' . $mpv})) {
- $dummy = prettyprint_pv($pos_calculating->{'board'}, @{$info->{'pv' . $mpv}});
+ $dummy = prettyprint_pv($pos_calculating, @{$info->{'pv' . $mpv}});
++$mpv;
}
};
}
$text .= ":\n";
- $text .= " " . join(', ', prettyprint_pv($pos_calculating->{'board'}, @{$info->{'pv' . $mpv}})) . "\n";
+ $text .= " " . join(', ', prettyprint_pv($pos_calculating, @{$info->{'pv' . $mpv}})) . "\n";
$text .= "\n";
++$mpv;
}
# single-PV
my $score = long_score($info, $pos_calculating, '');
$text .= " $score\n" if defined($score);
- $text .= " PV: " . join(', ', prettyprint_pv($pos_calculating->{'board'}, @{$info->{'pv'}}));
+ $text .= " PV: " . join(', ', prettyprint_pv($pos_calculating, @{$info->{'pv'}}));
$text .= "\n";
if (exists($info->{'nodes'}) && exists($info->{'nps'}) && exists($info->{'depth'})) {
eval {
my $pv = $info->{'pv' . $mpv};
- my $pretty_move = join('', prettyprint_pv($pos_calculating_second_engine->{'board'}, $pv->[0]));
- my @pretty_pv = prettyprint_pv($pos_calculating_second_engine->{'board'}, @$pv);
+ my $pretty_move = join('', prettyprint_pv($pos_calculating_second_engine, $pv->[0]));
+ my @pretty_pv = prettyprint_pv($pos_calculating_second_engine, @$pv);
if (scalar @pretty_pv > 5) {
@pretty_pv = @pretty_pv[0..4];
push @pretty_pv, "...";
my $key = $pretty_move;
my $line = sprintf(" %-6s %6s %3s %s",
$pretty_move,
- short_score($info, $pos_calculating_second_engine, $mpv, 0),
+ short_score($info, $pos_calculating_second_engine, $mpv),
"d" . $info->{'depth' . $mpv},
join(', ', @pretty_pv));
push @refutation_lines, [ $key, $line ];
$json->{'position'} = $pos_calculating->to_json_hash();
$json->{'id'} = $engine->{'id'};
$json->{'score'} = long_score($info, $pos_calculating, '');
+ $json->{'short_score'} = short_score($info, $pos_calculating, '');
$json->{'nodes'} = $info->{'nodes'};
$json->{'nps'} = $info->{'nps'};
$json->{'depth'} = $info->{'depth'};
$json->{'tbhits'} = $info->{'tbhits'};
$json->{'seldepth'} = $info->{'seldepth'};
+ $json->{'tablebase'} = $info->{'tablebase'};
- # single-PV only for now
- $json->{'pv_uci'} = $info->{'pv'};
- $json->{'pv_pretty'} = [ prettyprint_pv($pos_calculating->{'board'}, @{$info->{'pv'}}) ];
+ $json->{'pv_uci'} = $info->{'pv'}; # Still needs to be there for the JS to calculate arrows; only for the primary PV, though!
+ $json->{'pv_pretty'} = [ prettyprint_pv($pos_calculating, @{$info->{'pv'}}) ];
my %refutation_lines = ();
my @refutation_lines = ();
eval {
my $pv = $info->{'pv' . $mpv};
- my $pretty_move = join('', prettyprint_pv($pos_calculating->{'board'}, $pv->[0]));
- my @pretty_pv = prettyprint_pv($pos_calculating->{'board'}, @$pv);
+ my $pretty_move = join('', prettyprint_pv($pos_calculating, $pv->[0]));
+ my @pretty_pv = prettyprint_pv($pos_calculating, @$pv);
$refutation_lines{$pv->[0]} = {
sort_key => $pretty_move,
depth => $info->{'depth' . $mpv},
score_sort_key => score_sort_key($info, $pos_calculating, $mpv, 0),
- pretty_score => short_score($info, $pos_calculating, $mpv, 0),
+ pretty_score => short_score($info, $pos_calculating, $mpv),
pretty_move => $pretty_move,
pv_pretty => \@pretty_pv,
};
- $refutation_lines{$pv->[0]}->{'pv_uci'} = $pv;
};
}
}
$json->{'refutation_lines'} = \%refutation_lines;
- open my $fh, ">/srv/analysis.sesse.net/www/analysis.json.tmp"
+ my $encoded = JSON::XS::encode_json($json);
+ atomic_set_contents($remoteglotconf::json_output, $encoded);
+
+ if (exists($pos_calculating->{'pretty_history'}) &&
+ defined($remoteglotconf::json_history_dir)) {
+ my $halfmove_num = scalar @{$pos_calculating->{'pretty_history'}};
+ (my $fen = $pos_calculating->fen()) =~ tr,/ ,-_,;
+ my $filename = $remoteglotconf::json_history_dir . "/move$halfmove_num-$fen.json";
+
+ # Overwrite old analysis (assuming it exists at all) if we're
+ # using a different engine, or if we've calculated deeper.
+ # nodes is used as a tiebreaker. Don't bother about Multi-PV
+ # data; it's not that important.
+ my ($old_engine, $old_depth, $old_nodes) = get_json_analysis_stats($filename);
+ my $new_depth = $json->{'depth'} // 0;
+ my $new_nodes = $json->{'nodes'} // 0;
+ if (!defined($old_engine) ||
+ $old_engine ne $json->{'id'}{'name'} ||
+ $new_depth > $old_depth ||
+ ($new_depth == $old_depth && $new_nodes >= $old_nodes)) {
+ atomic_set_contents($filename, $encoded);
+ }
+ }
+}
+
+sub atomic_set_contents {
+ my ($filename, $contents) = @_;
+
+ open my $fh, ">", $filename . ".tmp"
or return;
- print $fh JSON::XS::encode_json($json);
+ print $fh $contents;
+ close $fh;
+ rename($filename . ".tmp", $filename);
+}
+
+sub get_json_analysis_stats {
+ my $filename = shift;
+
+ my ($engine, $depth, $nodes);
+
+ open my $fh, "<", $filename
+ or return undef;
+ local $/ = undef;
+ eval {
+ my $json = JSON::XS::decode_json(<$fh>);
+ $engine = $json->{'id'}{'name'} // die;
+ $depth = $json->{'depth'} // 0;
+ $nodes = $json->{'nodes'} // 0;
+ };
close $fh;
- rename("/srv/analysis.sesse.net/www/analysis.json.tmp", "/srv/analysis.sesse.net/www/analysis.json");
+ if ($@) {
+ warn "Error in decoding $filename: $@";
+ return undef;
+ }
+ return ($engine, $depth, $nodes);
}
sub uciprint {
}
sub short_score {
- my ($info, $pos, $mpv, $invert) = @_;
-
- $invert //= 0;
- if ($pos->{'toplay'} eq 'B') {
- $invert = !$invert;
- }
+ my ($info, $pos, $mpv) = @_;
+ my $invert = ($pos->{'toplay'} eq 'B');
if (defined($info->{'score_mate' . $mpv})) {
if ($invert) {
return sprintf "M%3d", -$info->{'score_mate' . $mpv};
if (exists($info->{'score_cp' . $mpv})) {
my $score = $info->{'score_cp' . $mpv} * 0.01;
if ($score == 0) {
- return " 0.00";
+ if ($info->{'tablebase'}) {
+ return "TB draw";
+ } else {
+ return " 0.00";
+ }
}
if ($invert) {
$score = -$score;
my ($info, $pos, $mpv, $invert) = @_;
if (defined($info->{'score_mate' . $mpv})) {
- if ($invert) {
- return 99999 - $info->{'score_mate' . $mpv};
+ my $mate = $info->{'score_mate' . $mpv};
+ my $score;
+ if ($mate > 0) {
+ # Side to move mates
+ $score = 99999 - $mate;
} else {
- return -(99999 - $info->{'score_mate' . $mpv});
+ # Side to move is getting mated (note the double negative for $mate)
+ $score = -99999 - $mate;
}
+ if ($invert) {
+ $score = -$score;
+ }
+ return $score;
} else {
if (exists($info->{'score_cp' . $mpv})) {
my $score = $info->{'score_cp' . $mpv};
if (exists($info->{'score_cp' . $mpv})) {
my $score = $info->{'score_cp' . $mpv} * 0.01;
if ($score == 0) {
- return "Score: 0.00";
+ if ($info->{'tablebase'}) {
+ return "Theoretical draw";
+ } else {
+ return "Score: 0.00";
+ }
}
if ($pos->{'toplay'} eq 'B') {
$score = -$score;
if ($move eq '') {
$pmove = '(current)';
} else {
- ($pmove) = prettyprint_pv($board, $move);
+ ($pmove) = prettyprint_pv_no_cache($board, $move);
$pmove .= $annotation;
}
return $text;
}
+sub schedule_tb_lookup {
+ return if (!defined($remoteglotconf::tb_serial_key));
+ my $pos = $pos_waiting // $pos_calculating;
+ return if (exists($tb_cache{$pos->fen()}));
+
+ # If there's more than seven pieces, there's not going to be an answer,
+ # so don't bother.
+ return if ($pos->num_pieces() > 7);
+
+ # Max one at a time. If it's still relevant when it returns,
+ # schedule_tb_lookup() will be called again.
+ return if ($tb_lookup_running);
+
+ $tb_lookup_running = 1;
+ my $url = 'http://158.250.18.203:6904/tasks/addtask?auth.login=' .
+ $remoteglotconf::tb_serial_key .
+ '&auth.password=aquarium&type=0&fen=' .
+ URI::Escape::uri_escape($pos->fen());
+ print TBLOG "Downloading $url...\n";
+ AnyEvent::HTTP::http_get($url, sub {
+ handle_tb_lookup_return(@_, $pos, $pos->fen());
+ });
+}
+
+sub handle_tb_lookup_return {
+ my ($body, $header, $pos, $fen) = @_;
+ print TBLOG "Response for [$fen]:\n";
+ print TBLOG $header . "\n\n";
+ print TBLOG $body . "\n\n";
+ eval {
+ my $response = JSON::XS::decode_json($body);
+ if ($response->{'ErrorCode'} != 0) {
+ die "Unknown tablebase server error: " . $response->{'ErrorDesc'};
+ }
+ my $state = $response->{'Response'}{'StateString'};
+ if ($state eq 'COMPLETE') {
+ my $pgn = Chess::PGN::Parse->new(undef, $response->{'Response'}{'Moves'});
+ if (!defined($pgn) || !$pgn->read_game()) {
+ warn "Error in parsing PGN\n";
+ } else {
+ $pgn->quick_parse_game;
+ my $pvpos = $pos;
+ my $moves = $pgn->moves;
+ my @uci_moves = ();
+ for my $move (@$moves) {
+ my $uci_move;
+ ($pvpos, $uci_move) = $pvpos->make_pretty_move($move);
+ push @uci_moves, $uci_move;
+ }
+ $tb_cache{$fen} = {
+ result => $pgn->result,
+ pv => \@uci_moves,
+ score => $response->{'Response'}{'Score'},
+ };
+ output();
+ }
+ } elsif ($state =~ /QUEUED/ || $state =~ /PROCESSING/) {
+ # Try again in a second. Note that if we have changed
+ # position in the meantime, we might query a completely
+ # different position! But that's fine.
+ } else {
+ die "Unknown response state " . $state;
+ }
+
+ # Wait a second before we schedule another one.
+ $tb_retry_timer = AnyEvent->timer(after => 1.0, cb => sub {
+ $tb_lookup_running = 0;
+ schedule_tb_lookup();
+ });
+ };
+ if ($@) {
+ warn "Error in tablebase lookup: $@";
+
+ # Don't try this one again, but don't block new lookups either.
+ $tb_lookup_running = 0;
+ }
+}
+
sub open_engine {
my ($cmdline, $tag, $cb) = @_;
return undef if (!defined($cmdline));