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remoteglot.pl
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#! /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.)
#
# Copyright 2007 Steinar H. Gunderson <steinar+remoteglot@gunderson.no>
# Licensed under the GNU General Public License, version 2.
#
use AnyEvent;
use AnyEvent::Handle;
use AnyEvent::HTTP;
use Chess::PGN::Parse;
use EV;
use Net::Telnet;
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;
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_cache = ();
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;
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;
# open the chess engine
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");
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");
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");
}
print "Chess engine ready.\n";
# now talk to FICS
my $t = Net::Telnet->new(Timeout => 10, Prompt => '/fics% /');
$t->input_log(\*FICSLOG);
$t->open($remoteglotconf::server);
$t->print($remoteglotconf::nick);
$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");
my $ev1 = AnyEvent->io(
fh => fileno($t),
poll => 'r',
cb => sub { # what callback to execute
while (1) {
my $line = $t->getline(Timeout => 0, errmode => 'return');
return if (!defined($line));
chomp $line;
$line =~ tr/\r//d;
handle_fics($line);
}
}
);
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/) {
my (@infos) = split / /, $line;
shift @infos;
parse_infos($engine, @infos);
}
if ($line =~ /^id/) {
my (@ids) = split / /, $line;
shift @ids;
parse_ids($engine, @ids);
}
if ($line =~ /^bestmove/) {
if ($primary) {
return if (!$remoteglotconf::uci_assume_full_compliance);
if (defined($pos_waiting)) {
uciprint($engine, "position fen " . $pos_waiting->fen());
uciprint($engine, "go infinite");
$pos_calculating = $pos_waiting;
$pos_waiting = undef;
}
} else {
$engine2->{'info'} = {};
my $pos = $pos_waiting // $pos_calculating;
uciprint($engine2, "position fen " . $pos->fen());
uciprint($engine2, "go infinite");
$pos_calculating_second_engine = $pos;
}
}
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->{'history'} = \@pretty_movelist;
}
}
$getting_movelist = 0;
}
if ($line =~ /^([A-Za-z]+)(?:\([A-Z]+\))* tells you: (.*)$/) {
my ($who, $msg) = ($1, $2);
next if (grep { $_ eq $who } (@remoteglotconf::masters) == 0);
if ($msg =~ /^fics (.*?)$/) {
$t->cmd("tell $who Executing '$1' on FICS.");
$t->cmd($1);
} elsif ($msg =~ /^uci (.*?)$/) {
$t->cmd("tell $who Sending '$1' to the engine.");
print { $engine->{'write'} } "$1\n";
} elsif ($msg =~ /^pgn (.*?)$/) {
my $url = $1;
$t->cmd("tell $who Starting to poll '$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.");
exit;
} else {
$t->cmd("tell $who Couldn't understand '$msg', sorry.");
}
}
#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)) {
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 $pos = Position->start_pos($white, $black);
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;
}
$pos->{'history'} = \@repretty_moves;
extract_clock($pgn, $pos);
# 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";
}
}
$http_timer = AnyEvent->timer(after => 1.0, cb => sub {
fetch_pgn($url);
});
}
sub handle_position {
my ($pos) = @_;
find_clock_start($pos, $pos_calculating);
# if this is already in the queue, ignore it (just update the result)
if (defined($pos_waiting) && $pos->fen() eq $pos_waiting->fen()) {
$pos_waiting->{'result'} = $pos->{'result'};
return;
}
# if we're already chewing on this and there's nothing else in the queue,
# also ignore it
if (!defined($pos_waiting) && defined($pos_calculating) &&
$pos->fen() eq $pos_calculating->fen()) {
$pos_calculating->{'result'} = $pos->{'result'};
return;
}
# if we're already thinking on something, stop and wait for the engine
# to approve
if (defined($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.
$pos_calculating->{'white_clock'} = $pos->{'white_clock'};
$pos_calculating->{'black_clock'} = $pos->{'black_clock'};
delete $pos_calculating->{'white_clock_target'};
delete $pos_calculating->{'black_clock_target'};
output_json(1);
if (!defined($pos_waiting)) {
uciprint($engine, "stop");
}
if ($remoteglotconf::uci_assume_full_compliance) {
$pos_waiting = $pos;
} else {
uciprint($engine, "position fen " . $pos->fen());
uciprint($engine, "go infinite");
$pos_calculating = $pos;
}
} else {
# it's wrong just to give the FEN (the move history is useful,
# and per the UCI spec, we should really have sent "ucinewgame"),
# but it's easier
uciprint($engine, "position fen " . $pos->fen());
uciprint($engine, "go infinite");
$pos_calculating = $pos;
}
if (defined($engine2)) {
if (defined($pos_calculating_second_engine)) {
uciprint($engine2, "stop");
} else {
uciprint($engine2, "position fen " . $pos->fen());
uciprint($engine2, "go infinite");
$pos_calculating_second_engine = $pos;
}
$engine2->{'info'} = {};
}
$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,
# since if no move has happened in the last half
# hour, the analysis/relay has most likely stopped
# and we should stop hogging server resources.
#
$t->cmd("date");
}
sub parse_infos {
my ($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 ($x[0] eq 'multipv') {
# Dealt with above
shift @x;
shift @x;
next;
}
if ($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] 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} = $value;
next;
}
if ($x[0] eq 'score') {
shift @x;
delete $info->{'score_cp' . $mpv};
delete $info->{'score_mate' . $mpv};
while ($x[0] eq 'cp' || $x[0] eq 'mate') {
if ($x[0] eq 'cp') {
shift @x;
$info->{'score_cp' . $mpv} = shift @x;
} elsif ($x[0] eq 'mate') {
shift @x;
$info->{'score_mate' . $mpv} = shift @x;
} else {
shift @x;
}
}
next;
}
if ($x[0] eq 'pv') {
$info->{'pv' . $mpv} = [ @x[1..$#x] ];
last;
}
if ($x[0] eq 'string' || $x[0] eq 'UCI_AnalyseMode' || $x[0] eq 'setting' || $x[0] eq 'contempt') {
last;
}
#print "unknown info '$x[0]', trying to recover...\n";
#shift @x;
die "Unknown info '" . join(',', @x) . "'";
}
}
sub parse_ids {
my ($engine, @x) = @_;
while (scalar @x > 0) {
if ($x[0] eq 'name') {
my $value = join(' ', @x);
$engine->{'id'}{'author'} = $value;
last;
}
# unknown
shift @x;
}
}
sub prettyprint_pv_no_cache {
my ($board, @pvs) = @_;
if (scalar @pvs == 0 || !defined($pvs[0])) {
return ();
}
my $pv = shift @pvs;
my ($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);
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;
}
}
my %tbprobe_cache = ();
sub complete_using_tbprobe {
my ($pos, $info, $mpv) = @_;
# We need Fathom installed to do standalone TB probes.
return if (!defined($remoteglotconf::fathom_cmdline));
# 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' . $mpv});
# If we have a draw or near-draw score, there's also not much interesting
# we could add from a tablebase. We only really want mates.
return if ($info->{'score_cp' . $mpv} >= -12250 && $info->{'score_cp' . $mpv} <= 12250);
# Run through the PV until we are at a 6-man position.
# TODO: We could in theory only have 5-man data.
my @pv = @{$info->{'pv' . $mpv}};
my $key = $pos->fen() . " " . join('', @pv);
my @moves = ();
if (exists($tbprobe_cache{$key})) {
@moves = @{$tbprobe_cache{$key}};
} else {
if ($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));
}
while ($pos->num_pieces() > 6 && $#pv > -1) {
my $move = shift @pv;
push @moves, $move;
$pos = $pos->make_move(parse_uci_move($move));
}
return if ($pos->num_pieces() > 6);
my $fen = $pos->fen();
my $pgn_text = `fathom --path=/srv/syzygy "$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;
$info->{'pv' . $mpv} = \@moves;
# Splice the PV from the tablebase onto what we have so far.
for my $move (@{$pgn->moves}) {
my $uci_move;
($pos, $uci_move) = $pos->make_pretty_move($move);
push @moves, $uci_move;
}
$tbprobe_cache{$key} = \@moves;
}
$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} = $matelen;
}
}
sub output {
#return;
return if (!defined($pos_calculating));
# Don't update too often.
my $age = Time::HiRes::tv_interval($latest_update);
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 {
$info->{'tablebase'} = 0;
}
#
# Some programs _always_ report MultiPV, even with only one PV.
# In this case, we simply use that data as if MultiPV was never
# specified.
#
if (exists($info->{'pv1'}) && !exists($info->{'pv2'})) {
for my $key (qw(pv score_cp score_mate nodes nps depth seldepth tbhits)) {
if (exists($info->{$key . '1'})) {
$info->{$key} = $info->{$key . '1'};
} else {
delete $info->{$key};
}
}
}
#
# 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'}});
}
my $mpv = 1;
while (exists($info->{'pv' . $mpv})) {
$dummy = prettyprint_pv($pos_calculating, @{$info->{'pv' . $mpv}});
++$mpv;
}
};
if ($@) {
$engine->{'info'} = {};
return;
}
# Now do our own Syzygy tablebase probes to convert scores like +123.45 to mate.
if (exists($info->{'pv'})) {
complete_using_tbprobe($pos_calculating, $info, '');
}
my $mpv = 1;
while (exists($info->{'pv' . $mpv})) {
complete_using_tbprobe($pos_calculating, $info, $mpv);
++$mpv;
}
output_screen();
output_json(0);
$latest_update = [Time::HiRes::gettimeofday];
}
sub output_screen {
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'})) {
$text .= ',';
}
}
if (exists($id->{'name'})) {
$text .= " by $id->{'name'}:\n\n";
} else {
$text .= ":\n\n";
}
return unless (exists($pos_calculating->{'board'}));
if (exists($info->{'pv1'}) && exists($info->{'pv2'})) {
# multi-PV
my $mpv = 1;
while (exists($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' . $mpv};
}
}
if (exists($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};
}
$text .= ":\n";
$text .= " " . join(', ', prettyprint_pv($pos_calculating, @{$info->{'pv' . $mpv}})) . "\n";
$text .= "\n";
++$mpv;
}
} else {
# single-PV
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 {
$text .= sprintf ", %u Syzygy hits", $info->{'tbhits'};
}
}
$text .= "\n\n";
}
#$text .= book_info($pos_calculating->fen(), $pos_calculating->{'board'}, $pos_calculating->{'toplay'});
my @refutation_lines = ();
if (defined($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, "...";
}
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, $line ];
};
}
}
if ($#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";
}
$text .= "\n\n";
}
if ($last_text ne $text) {
print "[H[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'} = $remoteglotconf::engine_details;
}
if (defined($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, '');
$json->{'using_lomonosov'} = defined($remoteglotconf::tb_serial_key);
$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,
};
};
}
}
$json->{'refutation_lines'} = \%refutation_lines;
# Piece together historic score information, to the degree we have it.
if (!$historic_json_only && exists($pos_calculating->{'history'})) {
my %score_history = ();
my $q = $dbh->prepare('SELECT * FROM scores WHERE id=?');
my $pos = Position->start_pos('white', 'black');
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);
}
$q->finish;
# 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;
}
}
$json->{'score_history'} = \%score_history;
}
# Give out a list of other games going on. (Empty is fine.)
# TODO: Don't bother reading our own file, the data will be stale anyway.
if (!$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;
}
}
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)) {
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',