4 # remoteglot - Connects an abitrary UCI-speaking engine to ICS for easier post-game
5 # analysis, or for live analysis of relayed games. (Do not use for
6 # cheating! Cheating is bad for your karma, and your abuser flag.)
8 # Copyright 2007 Steinar H. Gunderson <sgunderson@bigfoot.com>
9 # Licensed under the GNU General Public License, version 2.
15 use Chess::PGN::Parse;
23 require 'Position.pm';
31 my $latest_update = undef;
32 my $output_timer = undef;
33 my $http_timer = undef;
34 my $stop_pgn_fetch = 0;
35 my $tb_retry_timer = undef;
37 my $tb_lookup_running = 0;
41 open(FICSLOG, ">ficslog.txt")
42 or die "ficslog.txt: $!";
43 print FICSLOG "Log starting.\n";
47 open(UCILOG, ">ucilog.txt")
48 or die "ucilog.txt: $!";
49 print UCILOG "Log starting.\n";
53 open(TBLOG, ">tblog.txt")
54 or die "tblog.txt: $!";
55 print TBLOG "Log starting.\n";
61 # open the chess engine
62 my $engine = open_engine($remoteglotconf::engine_cmdline, 'E1', sub { handle_uci(@_, 1); });
63 my $engine2 = open_engine($remoteglotconf::engine2_cmdline, 'E2', sub { handle_uci(@_, 0); });
66 my ($pos_waiting, $pos_calculating, $pos_calculating_second_engine);
68 uciprint($engine, "setoption name UCI_AnalyseMode value true");
69 while (my ($key, $value) = each %remoteglotconf::engine_config) {
70 uciprint($engine, "setoption name $key value $value");
72 uciprint($engine, "ucinewgame");
74 if (defined($engine2)) {
75 uciprint($engine2, "setoption name UCI_AnalyseMode value true");
76 while (my ($key, $value) = each %remoteglotconf::engine2_config) {
77 uciprint($engine2, "setoption name $key value $value");
79 uciprint($engine2, "setoption name MultiPV value 500");
80 uciprint($engine2, "ucinewgame");
83 print "Chess engine ready.\n";
86 my $t = Net::Telnet->new(Timeout => 10, Prompt => '/fics% /');
87 $t->input_log(\*FICSLOG);
88 $t->open($remoteglotconf::server);
89 $t->print($remoteglotconf::nick);
90 $t->waitfor('/Press return to enter the server/');
94 $t->cmd("set shout 0");
95 $t->cmd("set seek 0");
96 $t->cmd("set style 12");
98 my $ev1 = AnyEvent->io(
101 cb => sub { # what callback to execute
103 my $line = $t->getline(Timeout => 0, errmode => 'return');
104 return if (!defined($line));
112 if (defined($remoteglotconf::target)) {
113 if ($remoteglotconf::target =~ /^http:/) {
114 fetch_pgn($remoteglotconf::target);
116 $t->cmd("observe $remoteglotconf::target");
119 print "FICS ready.\n";
121 # Engine events have already been set up by Engine.pm.
125 my ($engine, $line, $primary) = @_;
127 return if $line =~ /(upper|lower)bound/;
129 $line =~ s/ / /g; # Sometimes needed for Zappa Mexico
130 print UCILOG localtime() . " $engine->{'tag'} <= $line\n";
131 if ($line =~ /^info/) {
132 my (@infos) = split / /, $line;
135 parse_infos($engine, @infos);
137 if ($line =~ /^id/) {
138 my (@ids) = split / /, $line;
141 parse_ids($engine, @ids);
143 if ($line =~ /^bestmove/) {
145 return if (!$remoteglotconf::uci_assume_full_compliance);
146 if (defined($pos_waiting)) {
147 uciprint($engine, "position fen " . $pos_waiting->fen());
148 uciprint($engine, "go infinite");
150 $pos_calculating = $pos_waiting;
151 $pos_waiting = undef;
154 $engine2->{'info'} = {};
155 my $pos = $pos_waiting // $pos_calculating;
156 uciprint($engine2, "position fen " . $pos->fen());
157 uciprint($engine2, "go infinite");
158 $pos_calculating_second_engine = $pos;
164 my $getting_movelist = 0;
165 my $pos_for_movelist = undef;
166 my @uci_movelist = ();
167 my @pretty_movelist = ();
171 if ($line =~ /^<12> /) {
172 handle_position(Position->new($line));
175 if ($line =~ /^Movelist for game /) {
176 my $pos = $pos_waiting // $pos_calculating;
179 @pretty_movelist = ();
180 $pos_for_movelist = Position->start_pos($pos->{'player_w'}, $pos->{'player_b'});
181 $getting_movelist = 1;
184 if ($getting_movelist &&
185 $line =~ /^\s* \d+\. \s+ # move number
186 (\S+) \s+ \( [\d:.]+ \) \s* # first move, then time
187 (?: (\S+) \s+ \( [\d:.]+ \) )? # second move, then time
191 ($pos_for_movelist, $uci_move) = $pos_for_movelist->make_pretty_move($1);
192 push @uci_movelist, $uci_move;
193 push @pretty_movelist, $1;
196 ($pos_for_movelist, $uci_move) = $pos_for_movelist->make_pretty_move($2);
197 push @uci_movelist, $uci_move;
198 push @pretty_movelist, $2;
202 warn "Error when getting FICS move history: $@";
203 $getting_movelist = 0;
206 if ($getting_movelist &&
207 $line =~ /^\s+ \{.*\} \s+ (?: \* | 1\/2-1\/2 | 0-1 | 1-0 )/x) {
209 for my $pos ($pos_waiting, $pos_calculating) {
210 next if (!defined($pos));
211 if ($pos->fen() eq $pos_for_movelist->fen()) {
212 $pos->{'history'} = \@uci_movelist;
215 $getting_movelist = 0;
217 if ($line =~ /^([A-Za-z]+)(?:\([A-Z]+\))* tells you: (.*)$/) {
218 my ($who, $msg) = ($1, $2);
220 next if (grep { $_ eq $who } (@remoteglotconf::masters) == 0);
222 if ($msg =~ /^fics (.*?)$/) {
223 $t->cmd("tell $who Executing '$1' on FICS.");
225 } elsif ($msg =~ /^uci (.*?)$/) {
226 $t->cmd("tell $who Sending '$1' to the engine.");
227 print { $engine->{'write'} } "$1\n";
228 } elsif ($msg =~ /^pgn (.*?)$/) {
230 $t->cmd("tell $who Starting to poll '$url'.");
232 } elsif ($msg =~ /^stoppgn$/) {
233 $t->cmd("tell $who Stopping poll.");
236 } elsif ($msg =~ /^quit$/) {
237 $t->cmd("tell $who Bye bye.");
240 $t->cmd("tell $who Couldn't understand '$msg', sorry.");
243 #print "FICS: [$line]\n";
246 # Starts periodic fetching of PGNs from the given URL.
249 AnyEvent::HTTP::http_get($url, sub {
250 handle_pgn(@_, $url);
254 my ($last_pgn_white, $last_pgn_black);
255 my @last_pgn_uci_moves = ();
256 my $pgn_hysteresis_counter = 0;
259 my ($body, $header, $url) = @_;
261 if ($stop_pgn_fetch) {
267 my $pgn = Chess::PGN::Parse->new(undef, $body);
268 if (!defined($pgn) || !$pgn->read_game()) {
269 warn "Error in parsing PGN from $url\n";
272 $pgn->quick_parse_game;
273 my $pos = Position->start_pos($pgn->white, $pgn->black);
274 my $moves = $pgn->moves;
276 for my $move (@$moves) {
278 ($pos, $uci_move) = $pos->make_pretty_move($move);
279 push @uci_moves, $uci_move;
281 $pos->{'history'} = \@uci_moves;
283 # Sometimes, PGNs lose a move or two for a short while,
284 # or people push out new ones non-atomically.
285 # Thus, if we PGN doesn't change names but becomes
286 # shorter, we mistrust it for a few seconds.
288 if (defined($last_pgn_white) && defined($last_pgn_black) &&
289 $last_pgn_white eq $pgn->white &&
290 $last_pgn_black eq $pgn->black &&
291 scalar(@uci_moves) < scalar(@last_pgn_uci_moves)) {
292 if (++$pgn_hysteresis_counter < 3) {
297 $last_pgn_white = $pgn->white;
298 $last_pgn_black = $pgn->black;
299 @last_pgn_uci_moves = @uci_moves;
300 $pgn_hysteresis_counter = 0;
301 handle_position($pos);
305 warn "Error in parsing moves from $url\n";
309 $http_timer = AnyEvent->timer(after => 1.0, cb => sub {
314 sub handle_position {
317 # if this is already in the queue, ignore it
318 return if (defined($pos_waiting) && $pos->fen() eq $pos_waiting->fen());
320 # if we're already chewing on this and there's nothing else in the queue,
322 return if (!defined($pos_waiting) && defined($pos_calculating) &&
323 $pos->fen() eq $pos_calculating->fen());
325 # if we're already thinking on something, stop and wait for the engine
327 if (defined($pos_calculating)) {
328 if (!defined($pos_waiting)) {
329 uciprint($engine, "stop");
331 if ($remoteglotconf::uci_assume_full_compliance) {
334 uciprint($engine, "position fen " . $pos->fen());
335 uciprint($engine, "go infinite");
336 $pos_calculating = $pos;
339 # it's wrong just to give the FEN (the move history is useful,
340 # and per the UCI spec, we should really have sent "ucinewgame"),
342 uciprint($engine, "position fen " . $pos->fen());
343 uciprint($engine, "go infinite");
344 $pos_calculating = $pos;
347 if (defined($engine2)) {
348 if (defined($pos_calculating_second_engine)) {
349 uciprint($engine2, "stop");
351 uciprint($engine2, "position fen " . $pos->fen());
352 uciprint($engine2, "go infinite");
353 $pos_calculating_second_engine = $pos;
355 $engine2->{'info'} = {};
358 $engine->{'info'} = {};
361 schedule_tb_lookup();
364 # Output a command every move to note that we're
365 # still paying attention -- this is a good tradeoff,
366 # since if no move has happened in the last half
367 # hour, the analysis/relay has most likely stopped
368 # and we should stop hogging server resources.
374 my ($engine, @x) = @_;
377 my $info = $engine->{'info'};
379 # Search for "multipv" first of all, since e.g. Stockfish doesn't put it first.
380 for my $i (0..$#x - 1) {
381 if ($x[$i] eq 'multipv') {
387 while (scalar @x > 0) {
388 if ($x[0] eq 'multipv') {
394 if ($x[0] eq 'currmove' || $x[0] eq 'currmovenumber' || $x[0] eq 'cpuload') {
396 my $value = shift @x;
397 $info->{$key} = $value;
400 if ($x[0] eq 'depth' || $x[0] eq 'seldepth' || $x[0] eq 'hashfull' ||
401 $x[0] eq 'time' || $x[0] eq 'nodes' || $x[0] eq 'nps' ||
404 my $value = shift @x;
405 $info->{$key . $mpv} = $value;
408 if ($x[0] eq 'score') {
411 delete $info->{'score_cp' . $mpv};
412 delete $info->{'score_mate' . $mpv};
414 while ($x[0] eq 'cp' || $x[0] eq 'mate') {
417 $info->{'score_cp' . $mpv} = shift @x;
418 } elsif ($x[0] eq 'mate') {
420 $info->{'score_mate' . $mpv} = shift @x;
428 $info->{'pv' . $mpv} = [ @x[1..$#x] ];
431 if ($x[0] eq 'string' || $x[0] eq 'UCI_AnalyseMode' || $x[0] eq 'setting' || $x[0] eq 'contempt') {
435 #print "unknown info '$x[0]', trying to recover...\n";
437 die "Unknown info '" . join(',', @x) . "'";
443 my ($engine, @x) = @_;
445 while (scalar @x > 0) {
446 if ($x[0] =~ /^(name|author)$/) {
448 my $value = join(' ', @x);
449 $engine->{'id'}{$key} = $value;
458 sub prettyprint_pv_no_cache {
459 my ($board, @pvs) = @_;
461 if (scalar @pvs == 0 || !defined($pvs[0])) {
466 my ($from_col, $from_row, $to_col, $to_row, $promo) = parse_uci_move($pv);
467 my ($pretty, $nb) = $board->prettyprint_move($from_row, $from_col, $to_row, $to_col, $promo);
468 return ( $pretty, prettyprint_pv_no_cache($nb, @pvs) );
472 my ($pos, @pvs) = @_;
474 my $cachekey = join('', @pvs);
475 if (exists($pos->{'prettyprint_cache'}{$cachekey})) {
476 return @{$pos->{'prettyprint_cache'}{$cachekey}};
478 my @res = prettyprint_pv_no_cache($pos->{'board'}, @pvs);
479 $pos->{'prettyprint_cache'}{$cachekey} = \@res;
487 return if (!defined($pos_calculating));
489 # Don't update too often.
490 my $age = Time::HiRes::tv_interval($latest_update);
491 if ($age < $remoteglotconf::update_max_interval) {
492 my $wait = $remoteglotconf::update_max_interval + 0.01 - $age;
493 $output_timer = AnyEvent->timer(after => $wait, cb => \&output);
497 my $info = $engine->{'info'};
500 # If we have tablebase data from a previous lookup, replace the
501 # engine data with the data from the tablebase.
503 my $fen = $pos_calculating->fen();
504 if (exists($tb_cache{$fen})) {
505 for my $key (qw(pv score_cp score_mate nodes nps depth seldepth tbhits)) {
506 delete $info->{$key . '1'};
507 delete $info->{$key};
509 $info->{'nodes'} = 0;
511 $info->{'depth'} = 0;
512 $info->{'seldepth'} = 0;
513 $info->{'tbhits'} = 0;
515 my $t = $tb_cache{$fen};
517 my $matelen = int((1 + $t->{'score'}) / 2);
518 if ($t->{'result'} eq '1/2-1/2') {
519 $info->{'score_cp'} = 0;
520 } elsif ($t->{'result'} eq '1-0') {
521 if ($pos_calculating->{'toplay'} eq 'B') {
522 $info->{'score_mate'} = -$matelen;
524 $info->{'score_mate'} = $matelen;
527 if ($pos_calculating->{'toplay'} eq 'B') {
528 $info->{'score_mate'} = $matelen;
530 $info->{'score_mate'} = -$matelen;
534 $info->{'tablebase'} = 1;
536 $info->{'tablebase'} = 0;
540 # Some programs _always_ report MultiPV, even with only one PV.
541 # In this case, we simply use that data as if MultiPV was never
544 if (exists($info->{'pv1'}) && !exists($info->{'pv2'})) {
545 for my $key (qw(pv score_cp score_mate nodes nps depth seldepth tbhits)) {
546 if (exists($info->{$key . '1'})) {
547 $info->{$key} = $info->{$key . '1'};
553 # Check the PVs first. if they're invalid, just wait, as our data
554 # is most likely out of sync. This isn't a very good solution, as
555 # it can frequently miss stuff, but it's good enough for most users.
559 if (exists($info->{'pv'})) {
560 $dummy = prettyprint_pv($pos_calculating, @{$info->{'pv'}});
564 while (exists($info->{'pv' . $mpv})) {
565 $dummy = prettyprint_pv($pos_calculating, @{$info->{'pv' . $mpv}});
570 $engine->{'info'} = {};
576 $latest_update = [Time::HiRes::gettimeofday];
580 my $info = $engine->{'info'};
581 my $id = $engine->{'id'};
583 my $text = 'Analysis';
584 if ($pos_calculating->{'last_move'} ne 'none') {
585 if ($pos_calculating->{'toplay'} eq 'W') {
586 $text .= sprintf ' after %u. ... %s', ($pos_calculating->{'move_num'}-1), $pos_calculating->{'last_move'};
588 $text .= sprintf ' after %u. %s', $pos_calculating->{'move_num'}, $pos_calculating->{'last_move'};
590 if (exists($id->{'name'})) {
595 if (exists($id->{'name'})) {
596 $text .= " by $id->{'name'}:\n\n";
601 return unless (exists($pos_calculating->{'board'}));
603 if (exists($info->{'pv1'}) && exists($info->{'pv2'})) {
606 while (exists($info->{'pv' . $mpv})) {
607 $text .= sprintf " PV%2u", $mpv;
608 my $score = short_score($info, $pos_calculating, $mpv);
609 $text .= " ($score)" if (defined($score));
612 if (exists($info->{'tbhits' . $mpv}) && $info->{'tbhits' . $mpv} > 0) {
613 if ($info->{'tbhits' . $mpv} == 1) {
614 $tbhits = ", 1 tbhit";
616 $tbhits = sprintf ", %u tbhits", $info->{'tbhits' . $mpv};
620 if (exists($info->{'nodes' . $mpv}) && exists($info->{'nps' . $mpv}) && exists($info->{'depth' . $mpv})) {
621 $text .= sprintf " (%5u kn, %3u kn/s, %2u ply$tbhits)",
622 $info->{'nodes' . $mpv} / 1000, $info->{'nps' . $mpv} / 1000, $info->{'depth' . $mpv};
626 $text .= " " . join(', ', prettyprint_pv($pos_calculating, @{$info->{'pv' . $mpv}})) . "\n";
632 my $score = long_score($info, $pos_calculating, '');
633 $text .= " $score\n" if defined($score);
634 $text .= " PV: " . join(', ', prettyprint_pv($pos_calculating, @{$info->{'pv'}}));
637 if (exists($info->{'nodes'}) && exists($info->{'nps'}) && exists($info->{'depth'})) {
638 $text .= sprintf " %u nodes, %7u nodes/sec, depth %u ply",
639 $info->{'nodes'}, $info->{'nps'}, $info->{'depth'};
641 if (exists($info->{'seldepth'})) {
642 $text .= sprintf " (%u selective)", $info->{'seldepth'};
644 if (exists($info->{'tbhits'}) && $info->{'tbhits'} > 0) {
645 if ($info->{'tbhits'} == 1) {
646 $text .= ", one Syzygy hit";
648 $text .= sprintf ", %u Syzygy hits", $info->{'tbhits'};
654 #$text .= book_info($pos_calculating->fen(), $pos_calculating->{'board'}, $pos_calculating->{'toplay'});
656 my @refutation_lines = ();
657 if (defined($engine2)) {
658 for (my $mpv = 1; $mpv < 500; ++$mpv) {
659 my $info = $engine2->{'info'};
660 last if (!exists($info->{'pv' . $mpv}));
662 my $pv = $info->{'pv' . $mpv};
664 my $pretty_move = join('', prettyprint_pv($pos_calculating_second_engine, $pv->[0]));
665 my @pretty_pv = prettyprint_pv($pos_calculating_second_engine, @$pv);
666 if (scalar @pretty_pv > 5) {
667 @pretty_pv = @pretty_pv[0..4];
668 push @pretty_pv, "...";
670 my $key = $pretty_move;
671 my $line = sprintf(" %-6s %6s %3s %s",
673 short_score($info, $pos_calculating_second_engine, $mpv),
674 "d" . $info->{'depth' . $mpv},
675 join(', ', @pretty_pv));
676 push @refutation_lines, [ $key, $line ];
681 if ($#refutation_lines >= 0) {
682 $text .= "Shallow search of all legal moves:\n\n";
683 for my $line (sort { $a->[0] cmp $b->[0] } @refutation_lines) {
684 $text .= $line->[1] . "\n";
689 if ($last_text ne $text) {
690 print "
\e[H
\e[2J"; # clear the screen
697 my $info = $engine->{'info'};
700 $json->{'position'} = $pos_calculating->to_json_hash();
701 $json->{'id'} = $engine->{'id'};
702 $json->{'score'} = long_score($info, $pos_calculating, '');
703 $json->{'short_score'} = short_score($info, $pos_calculating, '');
705 $json->{'nodes'} = $info->{'nodes'};
706 $json->{'nps'} = $info->{'nps'};
707 $json->{'depth'} = $info->{'depth'};
708 $json->{'tbhits'} = $info->{'tbhits'};
709 $json->{'seldepth'} = $info->{'seldepth'};
710 $json->{'tablebase'} = $info->{'tablebase'};
712 # single-PV only for now
713 $json->{'pv_uci'} = $info->{'pv'};
715 my %refutation_lines = ();
716 my @refutation_lines = ();
717 if (defined($engine2)) {
718 for (my $mpv = 1; $mpv < 500; ++$mpv) {
719 my $info = $engine2->{'info'};
720 my $pretty_move = "";
722 last if (!exists($info->{'pv' . $mpv}));
725 my $pv = $info->{'pv' . $mpv};
726 my $pretty_move = join('', prettyprint_pv($pos_calculating, $pv->[0]));
727 my @pretty_pv = prettyprint_pv($pos_calculating, @$pv);
728 $refutation_lines{$pv->[0]} = {
729 sort_key => $pretty_move,
730 depth => $info->{'depth' . $mpv},
731 score_sort_key => score_sort_key($info, $pos_calculating, $mpv, 0),
732 pretty_score => short_score($info, $pos_calculating, $mpv),
733 pretty_move => $pretty_move,
735 $refutation_lines{$pv->[0]}->{'pv_uci'} = $pv;
739 $json->{'refutation_lines'} = \%refutation_lines;
741 my $encoded = JSON::XS::encode_json($json);
742 atomic_set_contents($remoteglotconf::json_output, $encoded);
744 if (exists($pos_calculating->{'history'}) &&
745 defined($remoteglotconf::json_history_dir)) {
746 my $halfmove_num = scalar @{$pos_calculating->{'history'}};
747 (my $fen = $pos_calculating->fen()) =~ tr,/ ,-_,;
748 my $filename = $remoteglotconf::json_history_dir . "/move$halfmove_num-$fen.json";
750 # Overwrite old analysis (assuming it exists at all) if we're
751 # using a different engine, or if we've calculated deeper.
752 # nodes is used as a tiebreaker. Don't bother about Multi-PV
753 # data; it's not that important.
754 my ($old_engine, $old_depth, $old_nodes) = get_json_analysis_stats($filename);
755 my $new_depth = $json->{'depth'} // 0;
756 my $new_nodes = $json->{'nodes'} // 0;
757 if (!defined($old_engine) ||
758 $old_engine ne $json->{'id'}{'name'} ||
759 $new_depth > $old_depth ||
760 ($new_depth == $old_depth && $new_nodes >= $old_nodes)) {
761 atomic_set_contents($filename, $encoded);
766 sub atomic_set_contents {
767 my ($filename, $contents) = @_;
769 open my $fh, ">", $filename . ".tmp"
773 rename($filename . ".tmp", $filename);
776 sub get_json_analysis_stats {
777 my $filename = shift;
779 my ($engine, $depth, $nodes);
781 open my $fh, "<", $filename
785 my $json = JSON::XS::decode_json(<$fh>);
786 $engine = $json->{'id'}{'name'} // die;
787 $depth = $json->{'depth'} // 0;
788 $nodes = $json->{'nodes'} // 0;
792 warn "Error in decoding $filename: $@";
795 return ($engine, $depth, $nodes);
799 my ($engine, $msg) = @_;
800 $engine->print($msg);
801 print UCILOG localtime() . " $engine->{'tag'} => $msg\n";
805 my ($info, $pos, $mpv) = @_;
807 my $invert = ($pos->{'toplay'} eq 'B');
808 if (defined($info->{'score_mate' . $mpv})) {
810 return sprintf "M%3d", -$info->{'score_mate' . $mpv};
812 return sprintf "M%3d", $info->{'score_mate' . $mpv};
815 if (exists($info->{'score_cp' . $mpv})) {
816 my $score = $info->{'score_cp' . $mpv} * 0.01;
818 if ($info->{'tablebase'}) {
827 return sprintf "%+5.2f", $score;
835 my ($info, $pos, $mpv, $invert) = @_;
837 if (defined($info->{'score_mate' . $mpv})) {
838 my $mate = $info->{'score_mate' . $mpv};
842 $score = 99999 - $mate;
844 # Side to move is getting mated (note the double negative for $mate)
845 $score = -99999 - $mate;
852 if (exists($info->{'score_cp' . $mpv})) {
853 my $score = $info->{'score_cp' . $mpv};
865 my ($info, $pos, $mpv) = @_;
867 if (defined($info->{'score_mate' . $mpv})) {
868 my $mate = $info->{'score_mate' . $mpv};
869 if ($pos->{'toplay'} eq 'B') {
873 return sprintf "White mates in %u", $mate;
875 return sprintf "Black mates in %u", -$mate;
878 if (exists($info->{'score_cp' . $mpv})) {
879 my $score = $info->{'score_cp' . $mpv} * 0.01;
881 if ($info->{'tablebase'}) {
882 return "Theoretical draw";
884 return "Score: 0.00";
887 if ($pos->{'toplay'} eq 'B') {
890 return sprintf "Score: %+5.2f", $score;
899 my ($fen, $board, $toplay) = @_;
901 if (exists($book_cache{$fen})) {
902 return $book_cache{$fen};
905 my $ret = `./booklook $fen`;
906 return "" if ($ret =~ /Not found/ || $ret eq '');
910 for my $m (split /\n/, $ret) {
911 my ($move, $annotation, $win, $draw, $lose, $rating, $rating_div) = split /,/, $m;
915 $pmove = '(current)';
917 ($pmove) = prettyprint_pv_no_cache($board, $move);
918 $pmove .= $annotation;
922 if ($toplay eq 'W') {
923 $score = 1.0 * $win + 0.5 * $draw + 0.0 * $lose;
925 $score = 0.0 * $win + 0.5 * $draw + 1.0 * $lose;
927 my $n = $win + $draw + $lose;
933 $percent = sprintf "%4u%%", int(100.0 * $score / $n + 0.5);
936 push @moves, [ $pmove, $n, $percent, $rating ];
939 @moves[1..$#moves] = sort { $b->[2] cmp $a->[2] } @moves[1..$#moves];
941 my $text = "Book moves:\n\n Perf. N Rating\n\n";
943 $text .= sprintf " %-10s %s %6u %4s\n", $m->[0], $m->[2], $m->[1], $m->[3]
949 sub schedule_tb_lookup {
950 return if (!defined($remoteglotconf::tb_serial_key));
951 my $pos = $pos_waiting // $pos_calculating;
952 return if (exists($tb_cache{$pos->fen()}));
954 # If there's more than seven pieces, there's not going to be an answer,
956 return if ($pos->num_pieces() > 7);
958 # Max one at a time. If it's still relevant when it returns,
959 # schedule_tb_lookup() will be called again.
960 return if ($tb_lookup_running);
962 $tb_lookup_running = 1;
963 my $url = 'http://158.250.18.203:6904/tasks/addtask?auth.login=' .
964 $remoteglotconf::tb_serial_key .
965 '&auth.password=aquarium&type=0&fen=' .
966 URI::Escape::uri_escape($pos->fen());
967 print TBLOG "Downloading $url...\n";
968 AnyEvent::HTTP::http_get($url, sub {
969 handle_tb_lookup_return(@_, $pos, $pos->fen());
973 sub handle_tb_lookup_return {
974 my ($body, $header, $pos, $fen) = @_;
975 print TBLOG "Response for [$fen]:\n";
976 print TBLOG $header . "\n\n";
977 print TBLOG $body . "\n\n";
979 my $response = JSON::XS::decode_json($body);
980 if ($response->{'ErrorCode'} != 0) {
981 die "Unknown tablebase server error: " . $response->{'ErrorDesc'};
983 my $state = $response->{'Response'}{'StateString'};
984 if ($state eq 'COMPLETE') {
985 my $pgn = Chess::PGN::Parse->new(undef, $response->{'Response'}{'Moves'});
986 if (!defined($pgn) || !$pgn->read_game()) {
987 warn "Error in parsing PGN\n";
989 $pgn->quick_parse_game;
991 my $moves = $pgn->moves;
993 for my $move (@$moves) {
995 ($pvpos, $uci_move) = $pvpos->make_pretty_move($move);
996 push @uci_moves, $uci_move;
999 result => $pgn->result,
1001 score => $response->{'Response'}{'Score'},
1005 } elsif ($state =~ /QUEUED/ || $state =~ /PROCESSING/) {
1006 # Try again in a second. Note that if we have changed
1007 # position in the meantime, we might query a completely
1008 # different position! But that's fine.
1010 die "Unknown response state " . $state;
1013 # Wait a second before we schedule another one.
1014 $tb_retry_timer = AnyEvent->timer(after => 1.0, cb => sub {
1015 $tb_lookup_running = 0;
1016 schedule_tb_lookup();
1020 warn "Error in tablebase lookup: $@";
1022 # Don't try this one again, but don't block new lookups either.
1023 $tb_lookup_running = 0;
1028 my ($cmdline, $tag, $cb) = @_;
1029 return undef if (!defined($cmdline));
1030 return Engine->open($cmdline, $tag, $cb);
1033 sub col_letter_to_num {
1034 return ord(shift) - ord('a');
1037 sub row_letter_to_num {
1038 return 7 - (ord(shift) - ord('1'));
1041 sub parse_uci_move {
1043 my $from_col = col_letter_to_num(substr($move, 0, 1));
1044 my $from_row = row_letter_to_num(substr($move, 1, 1));
1045 my $to_col = col_letter_to_num(substr($move, 2, 1));
1046 my $to_row = row_letter_to_num(substr($move, 3, 1));
1047 my $promo = substr($move, 4, 1);
1048 return ($from_col, $from_row, $to_col, $to_row, $promo);