#! /usr/bin/perl
#
-# remoteglot - Connects an abitrary UCI-speaking engine to ICS for easier post-game
-# analysis, or for live analysis of relayed games. (Do not use for
-# cheating! Cheating is bad for your karma, and your abuser flag.)
+# remoteglot - Connects an abitrary UCI-speaking engine to a (live) PGN,
+# for live analysis of relayed games.
#
-# Copyright 2007 Steinar H. Gunderson <sgunderson@bigfoot.com>
+# Copyright 2007 Steinar H. Gunderson <steinar+remoteglot@gunderson.no>
# Licensed under the GNU General Public License, version 2.
#
-use Net::Telnet;
-use FileHandle;
+use AnyEvent;
+use AnyEvent::Handle;
+use AnyEvent::HTTP;
+use Chess::PGN::Parse;
+use EV;
+use File::Slurp;
use IPC::Open2;
use Time::HiRes;
+use JSON::XS;
+use URI::Escape;
+use DBI;
+use DBD::Pg;
+require 'Position.pm';
+require 'Engine.pm';
+require 'config.pm';
use strict;
use warnings;
-
-$SIG{ALRM} = sub { output_screen(); };
+no warnings qw(once);
+
+# Program starts here
+my $latest_update = undef;
+my $output_timer = undef;
+my $http_timer = undef;
+my $stop_pgn_fetch = 0;
+my $tb_retry_timer = undef;
+my $tb_lookup_running = 0;
+my $last_written_json = undef;
+
+# Persisted so we can restart.
+# TODO: Figure out an appropriate way to deal with database restarts
+# and/or Postgres going away entirely.
+my $dbh = DBI->connect($remoteglotconf::dbistr, $remoteglotconf::dbiuser, $remoteglotconf::dbipass)
+ or die DBI->errstr;
+$dbh->{RaiseError} = 1;
$| = 1;
-my $server = "freechess.org";
-my $target = "Sesse";
-# my $engine = "/usr/games/toga2";
-my $engine = "wine Rybkav2.3.2a.mp.w32.exe";
-
-open(FICSLOG, ">ficslog.txt")
- or die "ficslog.txt: $!";
-print FICSLOG "Log starting.\n";
-select(FICSLOG);
-$| = 1;
-
open(UCILOG, ">ucilog.txt")
or die "ucilog.txt: $!";
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);
+umask 0022; # analysis.json should not be served to users.
# open the chess engine
-my $pid = IPC::Open2::open2(*UCIREAD, *UCIWRITE, $engine);
-my %uciinfo = ();
-my %ficsinfo = ();
+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_calculating, $pos_calculating_second_engine);
+
+# If not undef, we've started calculating this position but haven't ever given out
+# any analysis for it, so we're on a forced timer to do so.
+my $pos_calculating_started = undef;
+
+# If not undef, we've output this position, but without a main PV, so we're on
+# _another_ forced timer to do so.
+my $pos_pv_started = undef;
+my $last_output_had_pv = 0;
+
+setoptions($engine, \%remoteglotconf::engine_config);
+uciprint($engine, "ucinewgame");
+
+if (defined($engine2)) {
+ setoptions($engine2, \%remoteglotconf::engine2_config);
+ uciprint($engine2, "setoption name MultiPV value 500");
+ uciprint($engine2, "ucinewgame");
+}
-uciprint("uci");
+print "Chess engine ready.\n";
-# gobble the options
-while (<UCIREAD>) {
- /uciok/ && last;
+if (defined($remoteglotconf::target)) {
+ if ($remoteglotconf::target =~ /^(?:\/|https?:)/) {
+ my $target = $remoteglotconf::target;
+ # Convenience.
+ $target =~ s#https://lichess.org/broadcast/.*/([^/]+)?$#https://lichess.org/api/stream/broadcast/round/$1.pgn#;
+ fetch_pgn($target);
+ }
}
-uciprint("setoption name UCI_AnalyseMode value true");
-uciprint("setoption name NalimovPath value c:\\nalimov");
-uciprint("setoption name NalimovUsage value Rarely");
-uciprint("setoption name Hash value 1024");
-# uciprint("setoption name MultiPV value 3");
-# uciprint("setoption name Contempt value 1000");
-# uciprint("setoption name Outlook value Ultra Optimistic");
-uciprint("ucinewgame");
+# Engine events have already been set up by Engine.pm.
+EV::run;
-print "Chess engine ready.\n";
+sub handle_uci {
+ my ($engine, $line, $primary) = @_;
-# now talk to FICS
-my $t = Net::Telnet->new(Timeout => 10, Prompt => '/fics% /');
-$t->input_log(\*FICSLOG);
-$t->open($server);
-$t->print("guest");
-$t->waitfor('/Press return to enter the server/');
-$t->cmd("");
-
-# set some options
-$t->cmd("set shout 0");
-$t->cmd("set seek 0");
-$t->cmd("set style 12");
-$t->cmd("observe $target");
-
-# main loop
-print "FICS ready.\n";
-while (1) {
- my $rin = '';
- my $rout;
- vec($rin, fileno(UCIREAD), 1) = 1;
- vec($rin, fileno($t), 1) = 1;
-
- my ($nfound, $timeleft) = select($rout=$rin, undef, undef, 5.0);
- my $sleep = 1.0;
+ return if $line =~ /(upper|lower)bound/;
- while (1) {
- my $line = $t->getline(Timeout => 0, errmode => 'return');
- last if (!defined($line));
+ $line =~ s/ / /g; # Sometimes needed for Zappa Mexico
+ print UCILOG localtime() . " $engine->{'tag'} <= $line\n";
+
+ # If we've sent a stop command, gobble up lines until we see bestmove.
+ return if ($engine->{'stopping'} && $line !~ /^bestmove/);
+ $engine->{'stopping'} = 0;
+
+ if ($line =~ /^info/ && $line !~ / cluster /) {
+ my (@infos) = split / /, $line;
+ shift @infos;
+
+ parse_infos($engine, @infos);
+ }
+ if ($line =~ /^id/) {
+ my (@ids) = split / /, $line;
+ shift @ids;
+
+ parse_ids($engine, @ids);
+ }
+ output();
+}
+
+my $getting_movelist = 0;
+my $pos_for_movelist = undef;
+my @uci_movelist = ();
+my @pretty_movelist = ();
+
+# Starts periodic fetching of PGNs from the given URL.
+sub fetch_pgn {
+ my ($url) = @_;
+ if ($url =~ m#^/#) { # Local file.
+ eval {
+ local $/ = undef;
+ open my $fh, "<", $url
+ or die "$url: $!";
+ my $pgn = <$fh>;
+ close $fh;
+ handle_pgn($pgn, '', $url);
+ };
+ if ($@) {
+ warn "$url: $@";
+ $http_timer = AnyEvent->timer(after => $remoteglotconf::poll_frequency, cb => sub {
+ fetch_pgn($url);
+ });
+ }
+ } else {
+ my $buffer = '';
+ AnyEvent::HTTP::http_get($url,
+ on_body => sub {
+ handle_partial_pgn(@_, \$buffer, $url);
+ },
+ sub {
+ end_pgn(@_, \$buffer, $url);
+ });
+ }
+}
+
+my ($last_pgn_white, $last_pgn_black);
+my @last_pgn_uci_moves = ();
+my $pgn_hysteresis_counter = 0;
+
+sub handle_partial_pgn {
+ my ($body, $header, $buffer, $url) = @_;
+
+ if ($stop_pgn_fetch) {
+ $stop_pgn_fetch = 0;
+ $http_timer = undef;
+ return 0;
+ }
+ $$buffer .= $body;
+ while ($$buffer =~ s/^\s*(.*)\n\n\n//s) {
+ handle_pgn($1, $url);
+ }
+ return 1;
+}
+
+sub end_pgn {
+ my ($body, $header, $buffer, $url) = @_;
+ handle_pgn($$buffer, $url);
+ $$buffer = "";
+ $http_timer = AnyEvent->timer(after => $remoteglotconf::poll_frequency, cb => sub {
+ fetch_pgn($url);
+ });
+}
+
+sub handle_pgn {
+ my ($body, $url) = @_;
+
+ my $pgn = Chess::PGN::Parse->new(undef, $body);
+ if (!defined($pgn)) {
+ warn "Error in parsing PGN from $url [body='$body']\n";
+ } elsif (!$pgn->read_game()) {
+ warn "Error in reading PGN game from $url [body='$body']\n";
+ } elsif ($body !~ /^\[/) {
+ warn "Malformed PGN from $url [body='$body']\n";
+ } else {
+ eval {
+ # Skip to the right game.
+ while (defined($remoteglotconf::pgn_filter) &&
+ !&$remoteglotconf::pgn_filter($pgn)) {
+ $pgn->read_game() or die "Out of games during filtering";
+ }
+
+ $pgn->parse_game({ save_comments => 'yes' });
+ my $white = $pgn->white;
+ my $black = $pgn->black;
+ $white =~ s/,.*//; # Remove first name.
+ $black =~ s/,.*//; # Remove first name.
+ my $tags = $pgn->tags();
+ my $pos;
+ if (exists($tags->{'FEN'})) {
+ $pos = Position->from_fen($tags->{'FEN'});
+ $pos->{'last_move'} = 'none';
+ $pos->{'player_w'} = $white;
+ $pos->{'player_b'} = $black;
+ $pos->{'start_fen'} = $tags->{'FEN'};
+ } else {
+ $pos = Position->start_pos($white, $black);
+ }
+ if (exists($tags->{'Variant'}) &&
+ $tags->{'Variant'} =~ /960|fischer/i) {
+ $pos->{'chess960'} = 1;
+ } else {
+ $pos->{'chess960'} = 0;
+ }
+ my $moves = $pgn->moves;
+ my @uci_moves = ();
+ my @repretty_moves = ();
+ for my $move (@$moves) {
+ my ($npos, $uci_move) = $pos->make_pretty_move($move);
+ push @uci_moves, $uci_move;
+
+ # Re-prettyprint the move.
+ my ($from_row, $from_col, $to_row, $to_col, $promo) = parse_uci_move($uci_move);
+ my ($pretty, undef) = $pos->{'board'}->prettyprint_move($from_row, $from_col, $to_row, $to_col, $promo);
+ push @repretty_moves, $pretty;
+ $pos = $npos;
+ }
+ if ($pgn->result eq '1-0' || $pgn->result eq '1/2-1/2' || $pgn->result eq '0-1') {
+ $pos->{'result'} = $pgn->result;
+ }
- chomp $line;
- $line =~ tr/\r//d;
- if ($line =~ /^<12> /) {
- my $fen = style12_to_fen($line);
- uciprint("stop");
- uciprint("position fen $fen");
- uciprint("go infinite");
+ my @extra_moves = ();
+ $pos = extend_from_manual_override($pos, \@repretty_moves, \@extra_moves);
+ extract_clock($pgn, $pos);
+ $pos->{'history'} = \@repretty_moves;
+ $pos->{'extra_moves'} = \@extra_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: $@\n";
}
- #print "FICS: [$line]\n";
- $sleep = 0;
}
- # any fun on the UCI channel?
- if ($nfound > 0 && vec($rout, fileno(UCIREAD), 1) == 1) {
- my $line = <UCIREAD>;
- chomp $line;
- $line =~ tr/\r//d;
- print UCILOG "<= $line\n";
- if ($line =~ /^info/) {
- my (@infos) = split / /, $line;
- shift @infos;
+ $http_timer = AnyEvent->timer(after => $remoteglotconf::poll_frequency, cb => sub {
+ fetch_pgn($url);
+ });
+}
- parse_infos(@infos);
+sub handle_position {
+ my ($pos) = @_;
+ find_clock_start($pos, $pos_calculating);
+
+ # If we're already chewing on this and there's nothing else in the queue,
+ # ignore it.
+ if (defined($pos_calculating) && $pos->fen() eq $pos_calculating->fen()) {
+ $pos_calculating->{'result'} = $pos->{'result'};
+ for my $key ('white_clock', 'black_clock', 'white_clock_target', 'black_clock_target') {
+ $pos_calculating->{$key} //= $pos->{$key};
}
- $sleep = 0;
+ $pos_calculating->{'extra_moves'} = $pos->{'extra_moves'};
+ return;
+ }
- # don't update too often
- Time::HiRes::alarm(0.2);
+ # If we're already thinking on something, stop and wait for the engine
+ # to approve.
+ if (defined($pos_calculating)) {
+ # Store the final data we have for this position in the history,
+ # with the precise clock information we just got from the new
+ # position. (Historic positions store the clock at the end of
+ # the position.)
+ #
+ # Do not output anything new to the main analysis; that's
+ # going to be obsolete really soon. (Exception: If we've never
+ # output anything for this move, ie., it didn't hit the 200ms
+ # limit, spit it out to the user anyway. It's probably a really
+ # fast blitz game or something, and it's good to show the moves
+ # as they come in even without great analysis.)
+ $pos_calculating->{'white_clock'} = $pos->{'white_clock'};
+ $pos_calculating->{'black_clock'} = $pos->{'black_clock'};
+ delete $pos_calculating->{'white_clock_target'};
+ delete $pos_calculating->{'black_clock_target'};
+
+ if (defined($pos_calculating_started)) {
+ output_json(0);
+ } else {
+ output_json(1);
+ }
+ $pos_calculating_started = [Time::HiRes::gettimeofday];
+ $pos_pv_started = undef;
+
+ # Ask the engine to stop; we will throw away its data until it
+ # sends us "bestmove", signaling the end of it.
+ $engine->{'stopping'} = 1;
+ uciprint($engine, "stop");
}
- sleep $sleep;
+ # It's wrong to just give the FEN (the move history is useful,
+ # and per the UCI spec, we should really have sent "ucinewgame"),
+ # but it's easier, and it works around a Stockfish repetition issue.
+ if ($engine->{'chess960'} != $pos->{'chess960'}) {
+ uciprint($engine, "setoption name UCI_Chess960 value " . ($pos->{'chess960'} ? 'true' : 'false'));
+ $engine->{'chess960'} = $pos->{'chess960'};
+ }
+ uciprint($engine, "position fen " . $pos->fen());
+ uciprint($engine, "go infinite");
+ $pos_calculating = $pos;
+ $pos_calculating_started = [Time::HiRes::gettimeofday];
+ $pos_pv_started = undef;
+
+ if (defined($engine2)) {
+ if (defined($pos_calculating_second_engine)) {
+ $engine2->{'stopping'} = 1;
+ uciprint($engine2, "stop");
+ }
+ if ($engine2->{'chess960'} != $pos->{'chess960'}) {
+ uciprint($engine2, "setoption name UCI_Chess960 value " . ($pos->{'chess960'} ? 'true' : 'false'));
+ $engine2->{'chess960'} = $pos->{'chess960'};
+ }
+ uciprint($engine2, "position fen " . $pos->fen());
+ uciprint($engine2, "go infinite");
+ $pos_calculating_second_engine = $pos;
+ $engine2->{'info'} = {};
+ }
+
+ $engine->{'info'} = {};
+ $last_move = time;
}
sub parse_infos {
- my (@x) = @_;
+ my ($engine, @x) = @_;
my $mpv = '';
+ my $info = $engine->{'info'};
+
+ # Search for "multipv" first of all, since e.g. Stockfish doesn't put it first.
+ for my $i (0..$#x - 1) {
+ 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;
- $mpv = shift @x;
next;
}
- if ($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;
- $uciinfo{$key} = $value;
+ $info->{$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;
- $uciinfo{$key . $mpv} = $value;
+ $info->{$key . $mpv} = $value;
next;
}
if ($x[0] eq 'score') {
shift @x;
- delete $uciinfo{'score_cp' . $mpv};
- delete $uciinfo{'score_mate' . $mpv};
+ delete $info->{'score_cp' . $mpv};
+ delete $info->{'score_mate' . $mpv};
+ delete $info->{'splicepos' . $mpv};
- while ($x[0] =~ /^(cp|mate|lowerbound|upperbound)$/) {
+ while ($x[0] eq 'cp' || $x[0] eq 'mate') {
if ($x[0] eq 'cp') {
shift @x;
- $uciinfo{'score_cp' . $mpv} = shift @x;
+ $info->{'score_cp' . $mpv} = shift @x;
} elsif ($x[0] eq 'mate') {
shift @x;
- $uciinfo{'score_mate' . $mpv} = shift @x;
+ $info->{'score_mate' . $mpv} = shift @x;
} else {
shift @x;
}
next;
}
if ($x[0] eq 'pv') {
- $uciinfo{'pv' . $mpv} = [ @x[1..$#x] ];
+ $info->{'pv' . $mpv} = [ @x[1..$#x] ];
last;
}
if ($x[0] eq 'string' || $x[0] eq 'UCI_AnalyseMode' || $x[0] eq 'setting' || $x[0] eq 'contempt') {
}
}
-sub style12_to_fen {
- my $str = shift;
- my (@x) = split / /, $str;
-
- $ficsinfo{'board'} = [ @x[1..8] ];
- $ficsinfo{'toplay'} = $x[9];
-
- # the board itself
- my (@board) = @x[1..8];
- for my $rank (0..7) {
- $board[$rank] =~ s/(-+)/length($1)/ge;
- }
- my $fen = join('/', @board);
-
- # white/black to move
- $fen .= " ";
- $fen .= lc($x[9]);
-
- # 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);
- $castling = "-" if ($castling eq "");
- $fen .= " ";
- $fen .= $castling;
-
- # en passant
- my $ep = "-";
- if ($x[10] != -1) {
- my $col = $x[10];
- my $nep = (qw(a b c d e f g h))[$col];
-
- if ($x[9] eq 'B') {
- $nep .= "3";
- } else {
- $nep .= "6";
- }
-
- #
- # Showing the en passant square when actually no capture can be made
- # seems to confuse at least Rybka. Thus, check if there's actually
- # a pawn of the opposite side that can do the en passant move, and if
- # not, just lie -- it doesn't matter anyway. I'm unsure what's the
- # "right" thing as per the standard, though.
- #
- if ($x[9] eq 'B') {
- $ep = $nep if ($col > 0 && substr($board[4], $col-1, 1) eq 'p');
- $ep = $nep if ($col < 7 && substr($board[4], $col+1, 1) eq 'p');
- } else {
- $ep = $nep if ($col > 0 && substr($board[3], $col-1, 1) eq 'P');
- $ep = $nep if ($col < 7 && substr($board[3], $col+1, 1) eq 'P');
- }
- }
- $fen .= " ";
- $fen .= $ep;
-
- # half-move clock
- $fen .= " ";
- $fen .= $x[15];
+sub parse_ids {
+ my ($engine, @x) = @_;
- # full-move clock
- $fen .= " ";
- $fen .= $x[26];
+ while (scalar @x > 0) {
+ if ($x[0] eq 'name') {
+ my $value = join(' ', @x);
+ $engine->{'id'}{'author'} = $value;
+ last;
+ }
- return $fen;
+ # unknown
+ shift @x;
+ }
}
-sub prettyprint_pv {
+sub prettyprint_pv_no_cache {
my ($board, @pvs) = @_;
-
+
if (scalar @pvs == 0 || !defined($pvs[0])) {
return ();
}
- my $pv = shift @pvs;
- my $from_col = ord(substr($pv, 0, 1)) - ord('a');
- my $from_row = 7 - (ord(substr($pv, 1, 1)) - ord('1'));
- my $to_col = ord(substr($pv, 2, 1)) - ord('a');
- my $to_row = 7 - (ord(substr($pv, 3, 1)) - ord('1'));
-
- my $pretty;
- my $piece = substr($board->[$from_row], $from_col, 1);
-
- # white short castling
- if ($pv eq 'e1g1' && $piece eq 'K') {
- my @nb = @$board;
-
- # king
- substr($nb[7], 4, 1, '-');
- substr($nb[7], 6, 1, $piece);
-
- # rook
- substr($nb[7], 7, 1, '-');
- substr($nb[7], 5, 1, 'R');
-
- return ('0-0', prettyprint_pv(\@nb, @pvs));
+ my @ret = ();
+ for my $pv (@pvs) {
+ my ($from_row, $from_col, $to_row, $to_col, $promo) = parse_uci_move($pv);
+ my ($pretty, $nb) = $board->prettyprint_move($from_row, $from_col, $to_row, $to_col, $promo);
+ push @ret, $pretty;
+ $board = $nb;
}
+ return @ret;
+}
- # white long castling
- if ($pv eq 'e1c1' && $piece eq 'K') {
- my @nb = @$board;
+sub prettyprint_pv {
+ my ($pos, @pvs) = @_;
- # king
- substr($nb[7], 4, 1, '-');
- substr($nb[7], 2, 1, $piece);
-
- # rook
- substr($nb[7], 0, 1, '-');
- substr($nb[7], 3, 1, 'R');
-
- return ('0-0-0', prettyprint_pv(\@nb, @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;
}
+}
- # black short castling
- if ($pv eq 'e8g8' && $piece eq 'k') {
- my @nb = @$board;
+my %tbprobe_cache = ();
- # king
- substr($nb[0], 4, 1, '-');
- substr($nb[0], 6, 1, $piece);
-
- # rook
- substr($nb[0], 7, 1, '-');
- substr($nb[0], 5, 1, 'r');
-
- return ('0-0', prettyprint_pv(\@nb, @pvs));
- }
+sub complete_using_tbprobe {
+ my ($pos, $info, $mpv) = @_;
- # black long castling
- if ($pv eq 'e8c8' && $piece eq 'k') {
- my @nb = @$board;
+ # We need Fathom installed to do standalone TB probes.
+ return if (!defined($remoteglotconf::fathom_cmdline));
- # king
- substr($nb[0], 4, 1, '-');
- substr($nb[0], 2, 1, $piece);
-
- # rook
- substr($nb[0], 0, 1, '-');
- substr($nb[0], 3, 1, 'r');
-
- return ('0-0-0', prettyprint_pv(\@nb, @pvs));
- }
-
- # check if the from-piece is a pawn
- if (lc($piece) eq 'p') {
- # attack?
- if (substr($board->[$to_row], $to_col, 1) ne '-') {
- $pretty = substr($pv, 0, 1) . 'x' . substr($pv, 2, 2);
- } else {
- $pretty = substr($pv, 2, 2);
+ # If we already have a mate, don't bother; in some cases, it would even be
+ # better than a tablebase score.
+ return if defined($info->{'score_mate' . $mpv});
- if (length($pv) == 5) {
- # promotion
- $pretty .= "=";
- $pretty .= uc(substr($pv, 4, 1));
+ # If we have a draw or near-draw score, there's also not much interesting
+ # we could add from a tablebase. We only really want mates.
+ return if ($info->{'score_cp' . $mpv} >= -12250 && $info->{'score_cp' . $mpv} <= 12250);
- if ($piece eq 'p') {
- $piece = substr($pv, 4, 1);
- } else {
- $piece = uc(substr($pv, 4, 1));
- }
- }
- }
+ # Run through the PV until we are at a 6-man position.
+ # TODO: We could in theory only have 5-man data.
+ my @pv = @{$info->{'pv' . $mpv}};
+ my $key = $pos->fen() . " " . join('', @pv);
+ my @moves = ();
+ my $splicepos;
+ if (exists($tbprobe_cache{$key})) {
+ my $c = $tbprobe_cache{$key};
+ @moves = @{$c->{'moves'}};
+ $splicepos = $c->{'splicepos'};
} else {
- $pretty = uc($piece);
-
- # see how many of these pieces could go here, in all
- my $num_total = 0;
- for my $col (0..7) {
- for my $row (0..7) {
- next unless (substr($board->[$row], $col, 1) eq $piece);
- ++$num_total if (can_reach($board, $piece, $row, $col, $to_row, $to_col));
- }
+ if ($mpv ne '') {
+ # Force doing at least one move of the PV.
+ my $move = shift @pv;
+ push @moves, $move;
+ $pos = $pos->make_move(parse_uci_move($move));
}
- # see how many of these pieces from the given row could go here
- my $num_row = 0;
- for my $col (0..7) {
- next unless (substr($board->[$from_row], $col, 1) eq $piece);
- ++$num_row if (can_reach($board, $piece, $from_row, $col, $to_row, $to_col));
+ while ($pos->num_pieces() > 7 && $#pv > -1) {
+ my $move = shift @pv;
+ push @moves, $move;
+ $pos = $pos->make_move(parse_uci_move($move));
}
-
- # and same for columns
- my $num_col = 0;
- for my $row (0..7) {
- next unless (substr($board->[$row], $from_col, 1) eq $piece);
- ++$num_col if (can_reach($board, $piece, $row, $from_col, $to_row, $to_col));
+
+ return if ($pos->num_pieces() > 7);
+
+ my $fen = $pos->fen();
+ my $pgn_text = `$remoteglotconf::fathom_cmdline "$fen"`;
+ my $pgn = Chess::PGN::Parse->new(undef, $pgn_text);
+ return if (!defined($pgn) || !$pgn->read_game() || ($pgn->result ne '0-1' && $pgn->result ne '1-0'));
+ $pgn->quick_parse_game;
+
+ # Splice the PV from the tablebase onto what we have so far.
+ $splicepos = scalar @moves;
+ for my $move (@{$pgn->moves}) {
+ last if $move eq '#';
+ last if $move eq '1-0';
+ last if $move eq '0-1';
+ last if $move eq '1/2-1/2';
+ my $uci_move;
+ ($pos, $uci_move) = $pos->make_pretty_move($move);
+ push @moves, $uci_move;
}
-
- # see if we need to disambiguate
- if ($num_total > 1) {
- if ($num_col == 1) {
- $pretty .= substr($pv, 0, 1);
- } elsif ($num_row == 1) {
- $pretty .= substr($pv, 1, 1);
+
+ $tbprobe_cache{$key} = {
+ moves => \@moves,
+ splicepos => $splicepos
+ };
+ }
+
+ $info->{'pv' . $mpv} = \@moves;
+
+ my $matelen = int((1 + scalar @moves) / 2);
+ if ((scalar @moves) % 2 == 0) {
+ $info->{'score_mate' . $mpv} = -$matelen;
+ } else {
+ $info->{'score_mate' . $mpv} = $matelen;
+ }
+ $info->{'splicepos' . $mpv} = $splicepos;
+}
+
+sub output {
+ #return;
+
+ return if (!defined($pos_calculating));
+
+ my $info = $engine->{'info'};
+
+ # Don't update too often.
+ my $wait = $remoteglotconf::update_max_interval - Time::HiRes::tv_interval($latest_update);
+ if (defined($pos_calculating_started)) {
+ my $new_pos_wait = $remoteglotconf::update_force_after_move - Time::HiRes::tv_interval($pos_calculating_started);
+ $wait = $new_pos_wait if ($new_pos_wait < $wait);
+ }
+ if (!$last_output_had_pv && has_pv($info)) {
+ if (!defined($pos_pv_started)) {
+ $pos_pv_started = [Time::HiRes::gettimeofday];
+ }
+ # We just got initial PV, and we're in a hurry since we gave out a blank one earlier,
+ # so give us just 200ms more to increase the quality and then force a display.
+ my $new_pos_wait = $remoteglotconf::update_force_after_move - Time::HiRes::tv_interval($pos_pv_started);
+ $wait = $new_pos_wait if ($new_pos_wait < $wait);
+ }
+ if ($wait > 0.0) {
+ $output_timer = AnyEvent->timer(after => $wait + 0.01, cb => \&output);
+ return;
+ }
+ $pos_pv_started = undef;
+
+ # We're outputting something for this position now, so the special handling
+ # for new positions is off.
+ undef $pos_calculating_started;
+
+ #
+ # Some programs _always_ report MultiPV, even with only one PV.
+ # In this case, we simply use that data as if MultiPV was never
+ # specified.
+ #
+ if (exists($info->{'pv1'}) && !exists($info->{'pv2'})) {
+ for my $key (qw(pv score_cp score_mate nodes nps depth seldepth tbhits splicepos)) {
+ if (exists($info->{$key . '1'})) {
+ $info->{$key} = $info->{$key . '1'};
} else {
- $pretty .= substr($pv, 0, 2);
+ delete $info->{$key};
}
}
-
- # attack?
- if (substr($board->[$to_row], $to_col, 1) ne '-') {
- $pretty .= 'x';
+ }
+
+ #
+ # Check the PVs first. if they're invalid, just wait, as our data
+ # is most likely out of sync. This isn't a very good solution, as
+ # it can frequently miss stuff, but it's good enough for most users.
+ #
+ eval {
+ my $dummy;
+ if (exists($info->{'pv'})) {
+ $dummy = prettyprint_pv($pos_calculating, @{$info->{'pv'}});
}
-
- $pretty .= substr($pv, 2, 2);
+
+ my $mpv = 1;
+ while (exists($info->{'pv' . $mpv})) {
+ $dummy = prettyprint_pv($pos_calculating, @{$info->{'pv' . $mpv}});
+ ++$mpv;
+ }
+ };
+ if ($@) {
+ $engine->{'info'} = {};
+ return;
}
- # update the board
- my @nb = @$board;
- substr($nb[$from_row], $from_col, 1, '-');
- substr($nb[$to_row], $to_col, 1, $piece);
+ # Now do our own Syzygy tablebase probes to convert scores like +123.45 to mate.
+ if (exists($info->{'pv'})) {
+ complete_using_tbprobe($pos_calculating, $info, '');
+ }
- if (in_mate(\@nb)) {
- $pretty .= '#';
- } elsif (in_check(\@nb) ne 'none') {
- $pretty .= '+';
+ my $mpv = 1;
+ while (exists($info->{'pv' . $mpv})) {
+ complete_using_tbprobe($pos_calculating, $info, $mpv);
+ ++$mpv;
}
- return ($pretty, prettyprint_pv(\@nb, @pvs));
+ output_screen();
+ output_json(0);
+ $latest_update = [Time::HiRes::gettimeofday];
+ $last_output_had_pv = has_pv($info);
+}
+
+sub has_pv {
+ my $info = shift;
+ return 1 if (exists($info->{'pv'}) && (scalar(@{$info->{'pv'}}) > 0));
+ return 1 if (exists($info->{'pv1'}) && (scalar(@{$info->{'pv1'}}) > 0));
+ return 0;
}
sub output_screen {
- #return;
+ my $info = $engine->{'info'};
+ my $id = $engine->{'id'};
+
+ my $text = 'Analysis';
+ if ($pos_calculating->{'last_move'} ne 'none') {
+ if ($pos_calculating->{'toplay'} eq 'W') {
+ $text .= sprintf ' after %u. ... %s', ($pos_calculating->{'move_num'}-1), $pos_calculating->{'last_move'};
+ } else {
+ $text .= sprintf ' after %u. %s', $pos_calculating->{'move_num'}, $pos_calculating->{'last_move'};
+ }
+ if (exists($id->{'name'})) {
+ $text .= ',';
+ }
+ }
- print "\ecAnalysis:\n";
+ if (exists($id->{'name'})) {
+ $text .= " by $id->{'name'}:\n\n";
+ } else {
+ $text .= ":\n\n";
+ }
- return unless (exists($ficsinfo{'board'}));
+ return unless (exists($pos_calculating->{'board'}));
- if (exists($uciinfo{'pv1'})) {
+ my $extra_moves = $pos_calculating->{'extra_moves'};
+ if (defined($extra_moves) && scalar @$extra_moves > 0) {
+ $text .= " Manual move extensions: " . join(' ', @$extra_moves) . "\n";
+ }
+
+ if (exists($info->{'pv1'}) && exists($info->{'pv2'})) {
# multi-PV
my $mpv = 1;
- while (exists($uciinfo{'pv' . $mpv})) {
- printf " PV%2u", $mpv;
-
- if (defined($uciinfo{'score_mate' . $mpv})) {
- printf " (M%3d)", $uciinfo{'score_mate' . $mpv};
- } else {
- if (exists($uciinfo{'score_cp' . $mpv})) {
- my $score = $uciinfo{'score_cp' . $mpv} * 0.01;
- if ($ficsinfo{'toplay'} eq 'B') {
- $score = -$score;
- }
- printf " (%+5.2f)", $score;
+ while (exists($info->{'pv' . $mpv})) {
+ $text .= sprintf " PV%2u", $mpv;
+ my $score = short_score($info, $pos_calculating, $mpv);
+ $text .= " ($score)" if (defined($score));
+
+ my $tbhits = '';
+ if (exists($info->{'tbhits' . $mpv}) && $info->{'tbhits' . $mpv} > 0) {
+ if ($info->{'tbhits' . $mpv} == 1) {
+ $tbhits = ", 1 tbhit";
+ } else {
+ $tbhits = sprintf ", %u tbhits", $info->{'tbhits' . $mpv};
}
}
-
- if (exists($uciinfo{'nodes' . $mpv}) && exists($uciinfo{'nps' . $mpv}) && exists($uciinfo{'depth' . $mpv})) {
- printf " (%5u kn, %3u kn/s, %2u ply)",
- $uciinfo{'nodes' . $mpv} / 1000, $uciinfo{'nps' . $mpv} / 1000, $uciinfo{'depth' . $mpv};
+
+ if (exists($info->{'nodes' . $mpv}) && exists($info->{'nps' . $mpv}) && exists($info->{'depth' . $mpv})) {
+ $text .= sprintf " (%5u kn, %3u kn/s, %2u ply$tbhits)",
+ $info->{'nodes' . $mpv} / 1000, $info->{'nps' . $mpv} / 1000, $info->{'depth' . $mpv};
}
- print ":\n";
- print " ", join(', ', prettyprint_pv($ficsinfo{'board'}, @{$uciinfo{'pv' . $mpv}})), "\n";
- print "\n";
+ $text .= ":\n";
+ $text .= " " . join(', ', prettyprint_pv($pos_calculating, @{$info->{'pv' . $mpv}})) . "\n";
+ $text .= "\n";
++$mpv;
}
} else {
# single-PV
- if (defined($uciinfo{'score_mate'})) {
- my $mate = $uciinfo{'score_mate'};
- if ($ficsinfo{'toplay'} eq 'B') {
- $mate = -$mate;
- }
- if ($mate > 0) {
- printf " White mates in %u\n", $mate;
+ my $score = long_score($info, $pos_calculating, '');
+ $text .= " $score\n" if defined($score);
+ $text .= " PV: " . join(', ', prettyprint_pv($pos_calculating, @{$info->{'pv'}}));
+ $text .= "\n";
+
+ if (exists($info->{'nodes'}) && exists($info->{'nps'}) && exists($info->{'depth'})) {
+ $text .= sprintf " %u nodes, %7u nodes/sec, depth %u ply",
+ $info->{'nodes'}, $info->{'nps'}, $info->{'depth'};
+ }
+ if (exists($info->{'seldepth'})) {
+ $text .= sprintf " (%u selective)", $info->{'seldepth'};
+ }
+ if (exists($info->{'tbhits'}) && $info->{'tbhits'} > 0) {
+ if ($info->{'tbhits'} == 1) {
+ $text .= ", one Syzygy hit";
} else {
- printf " Black mates in %u\n", -$mate;
+ $text .= sprintf ", %u Syzygy hits", $info->{'tbhits'};
}
- } else {
- if (exists($uciinfo{'score_cp'})) {
- my $score = $uciinfo{'score_cp'} * 0.01;
- if ($ficsinfo{'toplay'} eq 'B') {
- $score = -$score;
+ }
+ $text .= "\n\n";
+ }
+
+ my @refutation_lines = ();
+ if (defined($engine2)) {
+ for (my $mpv = 1; $mpv < 500; ++$mpv) {
+ my $info = $engine2->{'info'};
+ last if (!exists($info->{'pv' . $mpv}));
+ eval {
+ complete_using_tbprobe($pos_calculating_second_engine, $info, $mpv);
+ my $pv = $info->{'pv' . $mpv};
+ 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, "...";
}
- printf " Score: %+5.2f\n", $score;
- }
+ my $key = $pretty_move;
+ my $line = sprintf(" %-6s %6s %3s %s",
+ $pretty_move,
+ short_score($info, $pos_calculating_second_engine, $mpv),
+ "d" . $info->{'depth' . $mpv},
+ join(', ', @pretty_pv));
+ push @refutation_lines, [ $key, $line ];
+ };
}
+ }
- print " PV: ", join(', ', prettyprint_pv($ficsinfo{'board'}, @{$uciinfo{'pv'}}));
- print "\n";
+ if ($#refutation_lines >= 0) {
+ $text .= "Shallow search of all legal moves:\n\n";
+ for my $line (sort { $a->[0] cmp $b->[0] } @refutation_lines) {
+ $text .= $line->[1] . "\n";
+ }
+ $text .= "\n\n";
+ }
- if (exists($uciinfo{'nodes'}) && exists($uciinfo{'nps'}) && exists($uciinfo{'depth'})) {
- printf " %u nodes, %7u nodes/sec, depth %u ply",
- $uciinfo{'nodes'}, $uciinfo{'nps'}, $uciinfo{'depth'};
+ if ($last_text ne $text) {
+ print "\e[H\e[2J"; # clear the screen
+ print $text;
+ $last_text = $text;
+ }
+}
+
+sub output_json {
+ my $historic_json_only = shift;
+ my $info = $engine->{'info'};
+
+ my $json = {};
+ $json->{'position'} = $pos_calculating->to_json_hash();
+ $json->{'engine'} = $engine->{'id'};
+ if (defined($remoteglotconf::engine_url)) {
+ $json->{'engine'}{'url'} = $remoteglotconf::engine_url;
+ }
+ if (defined($remoteglotconf::engine_details)) {
+ $json->{'engine'}{'details'} = $remoteglotconf::engine_details;
+ }
+ my @grpc_backends = ();
+ if (defined($remoteglotconf::engine_grpc_backend)) {
+ push @grpc_backends, $remoteglotconf::engine_grpc_backend;
+ }
+ if (defined($remoteglotconf::engine2_grpc_backend)) {
+ push @grpc_backends, $remoteglotconf::engine2_grpc_backend;
+ }
+ $json->{'internal'}{'grpc_backends'} = \@grpc_backends;
+ if (defined($remoteglotconf::move_source)) {
+ $json->{'move_source'} = $remoteglotconf::move_source;
+ }
+ if (defined($remoteglotconf::move_source_url)) {
+ $json->{'move_source_url'} = $remoteglotconf::move_source_url;
+ }
+ $json->{'score'} = score_digest($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'};
+ $json->{'pv'} = [ prettyprint_pv($pos_calculating, @{$info->{'pv'}}) ];
+
+ my %refutation_lines = ();
+ my @refutation_lines = ();
+ if (defined($engine2)) {
+ for (my $mpv = 1; $mpv < 500; ++$mpv) {
+ my $info = $engine2->{'info'};
+ my $pretty_move = "";
+ my @pretty_pv = ();
+ last if (!exists($info->{'pv' . $mpv}));
+
+ eval {
+ complete_using_tbprobe($pos_calculating, $info, $mpv);
+ my $pv = $info->{'pv' . $mpv};
+ my $pretty_move = join('', prettyprint_pv($pos_calculating, $pv->[0]));
+ my @pretty_pv = prettyprint_pv($pos_calculating, @$pv);
+ $refutation_lines{$pretty_move} = {
+ depth => $info->{'depth' . $mpv},
+ score => score_digest($info, $pos_calculating, $mpv),
+ move => $pretty_move,
+ pv => \@pretty_pv,
+ };
+ if (exists($info->{'splicepos' . $mpv})) {
+ $refutation_lines{$pretty_move}->{'splicepos'} = $info->{'splicepos' . $mpv};
+ }
+ };
+ }
+ }
+ $json->{'refutation_lines'} = \%refutation_lines;
+
+ # Piece together historic score information, to the degree we have it.
+ if (!$historic_json_only && exists($pos_calculating->{'history'})) {
+ my %score_history = ();
+
+ local $dbh->{AutoCommit} = 0;
+ my $q = $dbh->prepare('SELECT * FROM scores WHERE id=?');
+ my $pos;
+ if (exists($pos_calculating->{'start_fen'})) {
+ $pos = Position->from_fen($pos_calculating->{'start_fen'});
+ } else {
+ $pos = Position->start_pos('white', 'black');
}
- if (exists($uciinfo{'tbhits'})) {
- printf ", %u Nalimov hits", $uciinfo{'tbhits'};
+ $pos->{'chess960'} = $pos_calculating->{'chess960'};
+ my $halfmove_num = 0;
+ for my $move (@{$pos_calculating->{'history'}}) {
+ my $id = id_for_pos($pos, $halfmove_num);
+ my $ref = $dbh->selectrow_hashref($q, undef, $id);
+ if (defined($ref)) {
+ $score_history{$halfmove_num} = [
+ $ref->{'score_type'},
+ $ref->{'score_value'}
+ ];
+ }
+ ++$halfmove_num;
+ ($pos) = $pos->make_pretty_move($move);
}
- if (exists($uciinfo{'seldepth'})) {
- printf " (%u selective)", $uciinfo{'seldepth'};
+ $q->finish;
+ $dbh->commit;
+
+ # If at any point we are missing 10 consecutive moves,
+ # truncate the history there. This is so we don't get into
+ # a situation where we e.g. start analyzing at move 45,
+ # but we have analysis for 1. e4 from some completely different game
+ # and thus show a huge hole.
+ my $consecutive_missing = 0;
+ my $truncate_until = 0;
+ for (my $i = $halfmove_num; $i --> 0; ) {
+ if ($consecutive_missing >= 10) {
+ delete $score_history{$i};
+ next;
+ }
+ if (exists($score_history{$i})) {
+ $consecutive_missing = 0;
+ } else {
+ ++$consecutive_missing;
+ }
}
- print "\n\n";
+
+ $json->{'score_history'} = \%score_history;
}
-}
-sub find_kings {
- my $board = shift;
- my ($wkr, $wkc, $bkr, $bkc);
+ # Give out a list of other games going on. (Empty is fine.)
+ # TODO: Don't bother reading our own file, the data will be stale anyway.
+ if (!$historic_json_only) {
+ my @games = ();
+
+ my $q = $dbh->prepare('SELECT * FROM current_games ORDER BY priority DESC, id');
+ $q->execute;
+ while (my $ref = $q->fetchrow_hashref) {
+ eval {
+ my $other_game_contents = File::Slurp::read_file($ref->{'json_path'});
+ my $other_game_json = JSON::XS::decode_json($other_game_contents);
+
+ die "Missing position" if (!exists($other_game_json->{'position'}));
+ my $white = $other_game_json->{'position'}{'player_w'} // die 'Missing white';
+ my $black = $other_game_json->{'position'}{'player_b'} // die 'Missing black';
+
+ my $game = {
+ id => $ref->{'id'},
+ name => "$white–$black",
+ url => $ref->{'url'},
+ hashurl => $ref->{'hash_url'},
+ };
+ if (defined($other_game_json->{'position'}{'result'})) {
+ $game->{'result'} = $other_game_json->{'position'}{'result'};
+ } else {
+ $game->{'score'} = $other_game_json->{'score'};
+ }
+ push @games, $game;
+ };
+ if ($@) {
+ warn "Could not add external game " . $ref->{'json_path'} . ": $@";
+ }
+ }
+
+ if (scalar @games > 0) {
+ $json->{'games'} = \@games;
+ }
+ }
- for my $row (0..7) {
- for my $col (0..7) {
- my $piece = substr($board->[$row], $col, 1);
- if ($piece eq 'K') {
- ($wkr, $wkc) = ($row, $col);
- } elsif ($piece eq 'k') {
- ($bkr, $bkc) = ($row, $col);
+ my $json_enc = JSON::XS->new;
+ $json_enc->canonical(1);
+ my $encoded = $json_enc->encode($json);
+ unless ($historic_json_only || !defined($remoteglotconf::json_output) ||
+ (defined($last_written_json) && $last_written_json eq $encoded)) {
+ atomic_set_contents($remoteglotconf::json_output, $encoded);
+ $last_written_json = $encoded;
+ }
+
+ if (exists($pos_calculating->{'history'}) &&
+ defined($remoteglotconf::json_history_dir) && defined($json->{'engine'}{name})) {
+ my $id = id_for_pos($pos_calculating);
+ my $filename = $remoteglotconf::json_history_dir . "/" . $id . ".json";
+
+ # Overwrite old analysis (assuming it exists at all) if we're
+ # using a different engine, or if we've calculated deeper.
+ # nodes is used as a tiebreaker. Don't bother about Multi-PV
+ # data; it's not that important.
+ my ($old_engine, $old_depth, $old_nodes) = get_json_analysis_stats($id);
+ my $new_depth = $json->{'depth'} // 0;
+ my $new_nodes = $json->{'nodes'} // 0;
+ if (!defined($old_engine) ||
+ $old_engine ne $json->{'engine'}{'name'} ||
+ $new_depth > $old_depth ||
+ ($new_depth == $old_depth && $new_nodes >= $old_nodes)) {
+ atomic_set_contents($filename, $encoded);
+ if (defined($json->{'score'})) {
+ $dbh->do('INSERT INTO scores (id, score_type, score_value, engine, depth, nodes) VALUES (?,?,?,?,?,?) ' .
+ ' ON CONFLICT (id) DO UPDATE SET ' .
+ ' score_type=EXCLUDED.score_type, ' .
+ ' score_value=EXCLUDED.score_value, ' .
+ ' engine=EXCLUDED.engine, ' .
+ ' depth=EXCLUDED.depth, ' .
+ ' nodes=EXCLUDED.nodes',
+ undef,
+ $id, $json->{'score'}[0], $json->{'score'}[1],
+ $json->{'engine'}{'name'}, $new_depth, $new_nodes);
}
}
}
+}
+
+sub atomic_set_contents {
+ my ($filename, $contents) = @_;
- return ($wkr, $wkc, $bkr, $bkc);
+ open my $fh, ">", $filename . ".tmp"
+ or return;
+ print $fh $contents;
+ close $fh;
+ rename($filename . ".tmp", $filename);
}
-sub in_mate {
- my $board = shift;
- my $check = in_check($board);
- return 0 if ($check eq 'none');
+sub id_for_pos {
+ my ($pos, $halfmove_num) = @_;
- # try all possible moves for the side in check
- for my $row (0..7) {
- for my $col (0..7) {
- my $piece = substr($board->[$row], $col, 1);
- next if ($piece eq '-');
+ $halfmove_num //= scalar @{$pos->{'history'}};
+ (my $fen = $pos->fen()) =~ tr,/ ,-_,;
+ return "move$halfmove_num-$fen";
+}
- if ($check eq 'white') {
- next if ($piece eq lc($piece));
- } else {
- next if ($piece eq uc($piece));
- }
+sub get_json_analysis_stats {
+ my $id = shift;
+ my $ref = $dbh->selectrow_hashref('SELECT * FROM scores WHERE id=?', undef, $id);
+ if (defined($ref)) {
+ return ($ref->{'engine'}, $ref->{'depth'}, $ref->{'nodes'});
+ } else {
+ return ('', 0, 0);
+ }
+}
- for my $dest_row (0..7) {
- for my $dest_col (0..7) {
- next if ($row == $dest_row && $col == $dest_col);
- next unless (can_reach($board, $piece, $row, $col, $dest_row, $dest_col));
+sub uciprint {
+ my ($engine, $msg) = @_;
+ $engine->print($msg);
+ print UCILOG localtime() . " $engine->{'tag'} => $msg\n";
+}
- my @nb = @$board;
- substr($nb[$row], $col, 1, '-');
- substr($nb[$dest_row], $dest_col, 1, $piece);
+sub short_score {
+ my ($info, $pos, $mpv) = @_;
- my $new_check = in_check(\@nb);
- return 0 if ($new_check ne $check && $new_check ne 'both');
+ my $invert = ($pos->{'toplay'} eq 'B');
+ if (defined($info->{'score_mate' . $mpv})) {
+ if ($invert) {
+ return sprintf "M%3d", -$info->{'score_mate' . $mpv};
+ } else {
+ return sprintf "M%3d", $info->{'score_mate' . $mpv};
+ }
+ } else {
+ if (exists($info->{'score_cp' . $mpv})) {
+ my $score = $info->{'score_cp' . $mpv} * 0.01;
+ if ($score == 0) {
+ if ($info->{'tablebase'}) {
+ return "TB draw";
+ } else {
+ return " 0.00";
}
}
+ if ($invert) {
+ $score = -$score;
+ }
+ return sprintf "%+5.2f", $score;
}
}
- # nothing to do; mate
- return 1;
+ return undef;
}
-sub in_check {
- my $board = shift;
- my ($black_check, $white_check) = (0, 0);
+# Sufficient for computing long_score, short_score, plot_score and
+# (with side-to-play information) score_sort_key.
+sub score_digest {
+ my ($info, $pos, $mpv) = @_;
- my ($wkr, $wkc, $bkr, $bkc) = find_kings($board);
-
- # check all pieces for the possibility of threatening the two kings
- for my $row (0..7) {
- for my $col (0..7) {
- my $piece = substr($board->[$row], $col, 1);
- next if ($piece eq '-' || lc($piece) eq 'k');
-
- if (uc($piece) eq $piece) {
- # white piece
- $black_check = 1 if (can_reach($board, $piece, $row, $col, $bkr, $bkc));
+ if (defined($info->{'score_mate' . $mpv})) {
+ my $mate = $info->{'score_mate' . $mpv};
+ if ($pos->{'toplay'} eq 'B') {
+ $mate = -$mate;
+ }
+ if (exists($info->{'splicepos' . $mpv})) {
+ my $sp = $info->{'splicepos' . $mpv};
+ if ($mate > 0) {
+ return ['T', $sp];
} else {
- # black piece
- $white_check = 1 if (can_reach($board, $piece, $row, $col, $wkr, $wkc));
+ return ['t', $sp];
+ }
+ } else {
+ if ($mate > 0) {
+ return ['M', $mate];
+ } elsif ($mate < 0) {
+ return ['m', -$mate];
+ } elsif ($pos->{'toplay'} eq 'B') {
+ return ['M', 0];
+ } else {
+ return ['m', 0];
}
}
- }
-
- if ($black_check && $white_check) {
- return 'both';
- } elsif ($black_check) {
- return 'black';
- } elsif ($white_check) {
- return 'white';
} else {
- return 'none';
+ if (exists($info->{'score_cp' . $mpv})) {
+ my $score = $info->{'score_cp' . $mpv};
+ if ($pos->{'toplay'} eq 'B') {
+ $score = -$score;
+ }
+ if ($score == 0 && $info->{'tablebase'}) {
+ return ['d', undef];
+ } else {
+ return ['cp', int($score)];
+ }
+ }
}
+
+ return undef;
}
-sub can_reach {
- my ($board, $piece, $from_row, $from_col, $to_row, $to_col) = @_;
-
- # can't eat your own piece
- my $dest_piece = substr($board->[$to_row], $to_col, 1);
- if ($dest_piece ne '-') {
- return 0 if (($piece eq lc($piece)) == ($dest_piece eq lc($dest_piece)));
- }
+sub long_score {
+ my ($info, $pos, $mpv) = @_;
- if (lc($piece) eq 'k') {
- return (abs($from_row - $to_row) <= 1 && abs($from_col - $to_col) <= 1);
+ if (defined($info->{'score_mate' . $mpv})) {
+ my $mate = $info->{'score_mate' . $mpv};
+ if ($pos->{'toplay'} eq 'B') {
+ $mate = -$mate;
+ }
+ if (exists($info->{'splicepos' . $mpv})) {
+ my $sp = $info->{'splicepos' . $mpv};
+ if ($mate > 0) {
+ return sprintf "White wins in %u", int(($sp + 1) * 0.5);
+ } else {
+ return sprintf "Black wins in %u", int(($sp + 1) * 0.5);
+ }
+ } else {
+ if ($mate > 0) {
+ return sprintf "White mates in %u", $mate;
+ } else {
+ return sprintf "Black mates in %u", -$mate;
+ }
+ }
+ } else {
+ if (exists($info->{'score_cp' . $mpv})) {
+ my $score = $info->{'score_cp' . $mpv} * 0.01;
+ if ($score == 0) {
+ if ($info->{'tablebase'}) {
+ return "Theoretical draw";
+ } else {
+ return "Score: 0.00";
+ }
+ }
+ if ($pos->{'toplay'} eq 'B') {
+ $score = -$score;
+ }
+ return sprintf "Score: %+5.2f", $score;
+ }
}
- if (lc($piece) eq 'r') {
- return 0 unless ($from_row == $to_row || $from_col == $to_col);
- # check that there's a clear passage
- if ($from_row == $to_row) {
- if ($from_col > $to_col) {
- ($to_col, $from_col) = ($from_col, $to_col);
- }
+ return undef;
+}
- for my $c (($from_col+1)..($to_col-1)) {
- my $middle_piece = substr($board->[$to_row], $c, 1);
- return 0 if ($middle_piece ne '-');
- }
+# For graphs; a single number in centipawns, capped at +/- 500.
+sub plot_score {
+ my ($info, $pos, $mpv) = @_;
- return 1;
+ my $invert = ($pos->{'toplay'} eq 'B');
+ if (defined($info->{'score_mate' . $mpv})) {
+ my $mate = $info->{'score_mate' . $mpv};
+ if ($invert) {
+ $mate = -$mate;
+ }
+ if ($mate > 0) {
+ return 500;
} else {
- if ($from_row > $to_row) {
- ($to_row, $from_row) = ($from_row, $to_row);
- }
-
- for my $r (($from_row+1)..($to_row-1)) {
- my $middle_piece = substr($board->[$r], $to_col, 1);
- return 0 if ($middle_piece ne '-');
+ return -500;
+ }
+ } else {
+ if (exists($info->{'score_cp' . $mpv})) {
+ my $score = $info->{'score_cp' . $mpv};
+ if ($invert) {
+ $score = -$score;
}
-
- return 1;
+ $score = 500 if ($score > 500);
+ $score = -500 if ($score < -500);
+ return int($score);
}
}
- if (lc($piece) eq 'b') {
- return 0 unless (abs($from_row - $to_row) == abs($from_col - $to_col));
- my $dr = ($to_row - $from_row) / abs($to_row - $from_row);
- my $dc = ($to_col - $from_col) / abs($to_col - $from_col);
+ return undef;
+}
- my $r = $from_row + $dr;
- my $c = $from_col + $dc;
+sub extend_from_manual_override {
+ my ($pos, $moves, $extra_moves) = @_;
- while ($r != $to_row) {
- my $middle_piece = substr($board->[$r], $c, 1);
- return 0 if ($middle_piece ne '-');
-
- $r += $dr;
- $c += $dc;
+ my $q = $dbh->prepare('SELECT next_move FROM game_extensions WHERE fen=? AND history=? AND player_w=? AND player_b=? AND (CURRENT_TIMESTAMP - ts) < INTERVAL \'1 hour\'');
+ while (1) {
+ my $player_w = $pos->{'player_w'};
+ my $player_b = $pos->{'player_b'};
+ if ($player_w =~ /^base64:(.*)$/) {
+ $player_w = MIME::Base64::decode_base64($1);
+ }
+ if ($player_b =~ /^base64:(.*)$/) {
+ $player_b = MIME::Base64::decode_base64($1);
+ }
+ #use Data::Dumper; print Dumper([$pos->fen(), JSON::XS::encode_json($moves), $player_w, $player_b]);
+ $q->execute($pos->fen(), JSON::XS::encode_json($moves), $player_w, $player_b);
+ my $ref = $q->fetchrow_hashref;
+ if (defined($ref)) {
+ my $move = $ref->{'next_move'};
+ ($pos) = $pos->make_pretty_move($move);
+ push @$moves, $move;
+ push @$extra_moves, $move;
+ } else {
+ last;
}
-
- return 1;
}
- if (lc($piece) eq 'n') {
- my $diff_r = abs($from_row - $to_row);
- my $diff_c = abs($from_col - $to_col);
- return 1 if ($diff_r == 2 && $diff_c == 1);
- return 1 if ($diff_r == 1 && $diff_c == 2);
- return 0;
+ return $pos;
+}
+
+sub extract_clock {
+ my ($pgn, $pos) = @_;
+
+ # Look for extended PGN clock tags.
+ my $tags = $pgn->tags;
+ if (exists($tags->{'WhiteClock'}) && exists($tags->{'BlackClock'})) {
+ $pos->{'white_clock'} = hms_to_sec($tags->{'WhiteClock'});
+ $pos->{'black_clock'} = hms_to_sec($tags->{'BlackClock'});
+ return;
}
- if ($piece eq 'q') {
- return (can_reach($board, 'r', $from_row, $from_col, $to_row, $to_col) ||
- can_reach($board, 'b', $from_row, $from_col, $to_row, $to_col));
+
+ # Look for TCEC-style time comments.
+ my $moves = $pgn->moves;
+ my $comments = $pgn->comments;
+ my $last_black_move = int((scalar @$moves) / 2);
+ my $last_white_move = int((1 + scalar @$moves) / 2);
+
+ my $black_key = $last_black_move . "b";
+ my $white_key = $last_white_move . "w";
+
+ if (exists($comments->{$white_key}) &&
+ exists($comments->{$black_key}) &&
+ $comments->{$white_key} =~ /(?:tl=|clk )(\d+:\d+:\d+)/ &&
+ $comments->{$black_key} =~ /(?:tl=|clk )(\d+:\d+:\d+)/) {
+ $comments->{$white_key} =~ /(?:tl=|clk )(\d+:\d+:\d+)/;
+ $pos->{'white_clock'} = hms_to_sec($1);
+ $comments->{$black_key} =~ /(?:tl=|clk )(\d+:\d+:\d+)/;
+ $pos->{'black_clock'} = hms_to_sec($1);
+ return;
}
- if ($piece eq 'Q') {
- return (can_reach($board, 'R', $from_row, $from_col, $to_row, $to_col) ||
- can_reach($board, 'B', $from_row, $from_col, $to_row, $to_col));
+
+ delete $pos->{'white_clock'};
+ delete $pos->{'black_clock'};
+}
+
+sub hms_to_sec {
+ my $hms = shift;
+ return undef if (!defined($hms));
+ $hms =~ /(\d+):(\d+):(\d+)/;
+ return $1 * 3600 + $2 * 60 + $3;
+}
+
+sub find_clock_start {
+ my ($pos, $prev_pos) = @_;
+
+ # If the game is over, the clock is stopped.
+ if (exists($pos->{'result'}) &&
+ ($pos->{'result'} eq '1-0' ||
+ $pos->{'result'} eq '1/2-1/2' ||
+ $pos->{'result'} eq '0-1')) {
+ return;
}
- if ($piece eq 'p') {
- # black pawn
- if ($to_col == $from_col && $to_row == $from_row + 1) {
- return ($dest_piece eq '-');
+
+ # When we don't have any moves, we assume the clock hasn't started yet.
+ if ($pos->{'move_num'} == 1 && $pos->{'toplay'} eq 'W') {
+ if (defined($remoteglotconf::adjust_clocks_before_move)) {
+ &$remoteglotconf::adjust_clocks_before_move(\$pos->{'white_clock'}, \$pos->{'black_clock'}, 1, 'W');
}
- if (abs($to_col - $from_col) == 1 && $to_row == $from_row + 1) {
- return ($dest_piece ne '-');
+ return;
+ }
+
+ # The history is needed for id_for_pos.
+ if (!exists($pos->{'history'})) {
+ return;
+ }
+
+ my $id = id_for_pos($pos);
+ my $clock_info = $dbh->selectrow_hashref('SELECT * FROM clock_info WHERE id=? AND COALESCE(white_clock_target, black_clock_target) >= EXTRACT(EPOCH FROM (CURRENT_TIMESTAMP - INTERVAL \'1 day\'));', undef, $id);
+ if (defined($clock_info)) {
+ $pos->{'white_clock'} //= $clock_info->{'white_clock'};
+ $pos->{'black_clock'} //= $clock_info->{'black_clock'};
+ if ($pos->{'toplay'} eq 'W') {
+ $pos->{'white_clock_target'} = $clock_info->{'white_clock_target'};
+ } else {
+ $pos->{'black_clock_target'} = $clock_info->{'black_clock_target'};
}
- return 0;
+ return;
}
- if ($piece eq 'P') {
- # white pawn
- if ($to_col == $from_col && $to_row == $from_row - 1) {
- return ($dest_piece eq '-');
+
+ # OK, we haven't seen this position before, so we assume the move
+ # happened right now.
+
+ # See if we should do our own clock management (ie., clock information
+ # is spurious or non-existent).
+ if (defined($remoteglotconf::adjust_clocks_before_move)) {
+ my $wc = $pos->{'white_clock'} // $prev_pos->{'white_clock'};
+ my $bc = $pos->{'black_clock'} // $prev_pos->{'black_clock'};
+ if (defined($prev_pos->{'white_clock_target'})) {
+ $wc = $prev_pos->{'white_clock_target'} - time;
}
- if (abs($to_col - $from_col) == 1 && $to_row == $from_row - 1) {
- return ($dest_piece ne '-');
+ if (defined($prev_pos->{'black_clock_target'})) {
+ $bc = $prev_pos->{'black_clock_target'} - time;
}
- return 0;
+ &$remoteglotconf::adjust_clocks_before_move(\$wc, \$bc, $pos->{'move_num'}, $pos->{'toplay'});
+ $pos->{'white_clock'} = $wc;
+ $pos->{'black_clock'} = $bc;
}
-
- # unknown piece
- return 0;
+
+ my $key = ($pos->{'toplay'} eq 'W') ? 'white_clock' : 'black_clock';
+ if (!exists($pos->{$key})) {
+ # No clock information.
+ return;
+ }
+ my $time_left = $pos->{$key};
+ my ($white_clock_target, $black_clock_target);
+ if ($pos->{'toplay'} eq 'W') {
+ $white_clock_target = $pos->{'white_clock_target'} = time + $time_left;
+ } else {
+ $black_clock_target = $pos->{'black_clock_target'} = time + $time_left;
+ }
+ local $dbh->{AutoCommit} = 0;
+ $dbh->do('DELETE FROM clock_info WHERE id=?', undef, $id);
+ $dbh->do('INSERT INTO clock_info (id, white_clock, black_clock, white_clock_target, black_clock_target) VALUES (?, ?, ?, ?, ?)', undef,
+ $id, $pos->{'white_clock'}, $pos->{'black_clock'}, $white_clock_target, $black_clock_target);
+ $dbh->commit;
}
-sub uciprint {
- my $msg = shift;
- print UCIWRITE "$msg\n";
- print UCILOG "=> $msg\n";
+sub open_engine {
+ my ($cmdline, $tag, $cb) = @_;
+ return undef if (!defined($cmdline));
+ return Engine->open($cmdline, $tag, $cb);
+}
+
+sub col_letter_to_num {
+ return ord(shift) - ord('a');
+}
+
+sub row_letter_to_num {
+ return 7 - (ord(shift) - ord('1'));
+}
+
+sub parse_uci_move {
+ my $move = shift;
+ my $from_col = col_letter_to_num(substr($move, 0, 1));
+ my $from_row = row_letter_to_num(substr($move, 1, 1));
+ my $to_col = col_letter_to_num(substr($move, 2, 1));
+ my $to_row = row_letter_to_num(substr($move, 3, 1));
+ my $promo = substr($move, 4, 1);
+ return ($from_row, $from_col, $to_row, $to_col, $promo);
+}
+
+sub setoptions {
+ my ($engine, $config) = @_;
+ uciprint($engine, "setoption name UCI_AnalyseMode value true");
+ uciprint($engine, "setoption name Analysis Contempt value Off");
+ if (exists($config->{'Threads'})) { # Threads first, because clearing hash can be multithreaded then.
+ uciprint($engine, "setoption name Threads value " . $config->{'Threads'});
+ }
+ while (my ($key, $value) = each %$config) {
+ next if $key eq 'Threads';
+ uciprint($engine, "setoption name $key value $value");
+ }
}