use FileHandle;
use IPC::Open2;
use Time::HiRes;
+use JSON::XS;
use strict;
use warnings;
my $server = "freechess.org";
my $target = "GMCarlsen";
my $engine_cmdline = "'./Deep Rybka 4 SSE42 x64'";
+my $engine2_cmdline = "./stockfish_13111119_x64_modern_sse42"; # undef for none
my $telltarget = undef; # undef to be silent
my @tell_intervals = (5, 20, 60, 120, 240, 480, 960); # after each move
my $uci_assume_full_compliance = 0; # dangerous :-)
+my $update_max_interval = 1.0;
my @masters = (
'Sesse',
'Sessse',
);
# Program starts here
-$SIG{ALRM} = sub { output_screen(); };
+$SIG{ALRM} = sub { output(); };
+my $latest_update = undef;
$| = 1;
select(STDOUT);
# open the chess engine
-my $engine = open_engine($engine_cmdline);
-my %uciinfo = ();
-my %uciid = ();
+my $engine = open_engine($engine_cmdline, 'E1');
+my $engine2 = open_engine($engine2_cmdline, 'E2');
my ($last_move, $last_tell);
my $last_text = '';
my $last_told_text = '';
-my ($pos_waiting, $pos_calculating);
+my ($pos_waiting, $pos_calculating, $pos_calculating_second_engine);
uciprint($engine, "setoption name UCI_AnalyseMode value true");
# uciprint($engine, "setoption name NalimovPath value /srv/tablebase");
# uciprint($engine, "setoption name MultiPV value 2");
uciprint($engine, "ucinewgame");
+if (defined($engine2)) {
+ uciprint($engine2, "setoption name UCI_AnalyseMode value true");
+ # uciprint($engine2, "setoption name NalimovPath value /srv/tablebase");
+ uciprint($engine2, "setoption name NalimovUsage value Rarely");
+ uciprint($engine2, "setoption name Hash value 1024");
+ uciprint($engine2, "setoption name Threads value 8");
+ uciprint($engine2, "setoption name MultiPV value 500");
+ uciprint($engine2, "ucinewgame");
+}
+
print "Chess engine ready.\n";
# now talk to FICS
my $rin = '';
my $rout;
vec($rin, fileno($engine->{'read'}), 1) = 1;
+ if (defined($engine2)) {
+ vec($rin, fileno($engine2->{'read'}), 1) = 1;
+ }
vec($rin, fileno($t), 1) = 1;
my ($nfound, $timeleft) = select($rout=$rin, undef, undef, 5.0);
$pos_calculating = $pos;
}
- %uciinfo = ();
+ if (defined($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'} = {};
$last_move = time;
# any fun on the UCI channel?
if ($nfound > 0 && vec($rout, fileno($engine->{'read'}), 1) == 1) {
- my $line = read_line($engine->{'read'});
- handle_uci($engine, $line);
+ my @lines = read_lines($engine);
+ for my $line (@lines) {
+ next if $line =~ /(upper|lower)bound/;
+ handle_uci($engine, $line, 1);
+ }
$sleep = 0;
- # don't update too often
- Time::HiRes::alarm(0.2);
+ output();
+ }
+ if (defined($engine2) && $nfound > 0 && vec($rout, fileno($engine2->{'read'}), 1) == 1) {
+ my @lines = read_lines($engine2);
+ for my $line (@lines) {
+ next if $line =~ /(upper|lower)bound/;
+ handle_uci($engine2, $line, 0);
+ }
+ $sleep = 0;
+
+ output();
}
sleep $sleep;
}
sub handle_uci {
- my ($engine, $line) = @_;
+ my ($engine, $line, $primary) = @_;
chomp $line;
$line =~ tr/\r//d;
$line =~ s/ / /g; # Sometimes needed for Zappa Mexico
- print UCILOG localtime() . " <= $line\n";
+ print UCILOG localtime() . " $engine->{'tag'} <= $line\n";
if ($line =~ /^info/) {
my (@infos) = split / /, $line;
shift @infos;
parse_ids($engine, @ids);
}
- if ($line =~ /^bestmove/ && $uci_assume_full_compliance) {
- if (defined($pos_waiting)) {
- uciprint($engine, "position fen " . $pos_waiting->{'fen'});
- uciprint($engine, "go infinite");
+ if ($line =~ /^bestmove/) {
+ if ($primary) {
+ return if (!$uci_assume_full_compliance);
+ if (defined($pos_waiting)) {
+ uciprint($engine, "position fen " . $pos_waiting->{'fen'});
+ uciprint($engine, "go infinite");
- $pos_calculating = $pos_waiting;
- $pos_waiting = undef;
+ $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;
}
}
}
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] =~ 'multipv') {
+ $mpv = $x[$i + 1];
+ next;
+ }
+ }
+
while (scalar @x > 0) {
if ($x[0] =~ 'multipv') {
+ # Dealt with above
+ shift @x;
shift @x;
- $mpv = shift @x;
next;
}
if ($x[0] =~ /^(currmove|currmovenumber|cpuload)$/) {
$pos{'black_castle_q'} = $x[14];
$pos{'time_to_100move_rule'} = $x[15];
$pos{'move_num'} = $x[26];
+ if ($x[27] =~ /([a-h][1-8])-([a-h][1-8])/) {
+ $pos{'last_move_uci'} = $1 . $2;
+ } else {
+ $pos{'last_move_uci'} = undef;
+ }
$pos{'last_move'} = $x[29];
$pos{'fen'} = make_fen(\%pos);
return ($pretty, prettyprint_pv($nb, @pvs));
}
-sub output_screen {
+sub output {
#return;
-
+
return if (!defined($pos_calculating));
+ # Don't update too often.
+ my $age = Time::HiRes::tv_interval($latest_update);
+ if ($age < $update_max_interval) {
+ Time::HiRes::alarm($update_max_interval + 0.01 - $age);
+ return;
+ }
+
my $info = $engine->{'info'};
- my $id = $engine->{'id'};
-
+
+ #
+ # Some programs _always_ report MultiPV, even with only one PV.
+ # In this case, we simply use that data as if MultiPV was never
+ # specified.
+ #
+ if (exists($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'};
+ }
+ }
+ }
+
#
# 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
return;
}
+ output_screen();
+ output_json();
+ $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 ($pos_calculating->{'toplay'} eq 'W') {
return unless (exists($pos_calculating->{'board'}));
- #
- # 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->{$key . '1'}) && !exists($info->{$key})) {
- $info->{$key} = $info->{$key . '1'};
- }
- }
- }
-
if (exists($info->{'pv1'}) && exists($info->{'pv2'})) {
# multi-PV
my $mpv = 1;
$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 Nalimov hit";
$text .= sprintf ", %u Nalimov hits", $info->{'tbhits'};
}
}
- if (exists($info->{'seldepth'})) {
- $text .= sprintf " (%u selective)", $info->{'seldepth'};
- }
- $text .= "\n\n";
+ $text .= "\n\n";
}
#$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 {
+ my $pv = $info->{'pv' . $mpv};
+
+ my $pretty_move = join('', prettyprint_pv($pos_calculating_second_engine->{'board'}, $pv->[0]));
+ my @pretty_pv = prettyprint_pv($pos_calculating_second_engine->{'board'}, @$pv);
+ if (scalar @pretty_pv > 5) {
+ @pretty_pv = @pretty_pv[0..4];
+ push @pretty_pv, "...";
+ }
+ my $key = $pretty_move;
+ my $line = sprintf(" %-6s %6s %3s %s",
+ $pretty_move,
+ short_score($info, $pos_calculating_second_engine, $mpv, 0),
+ "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 "\e[H\e[2J"; # clear the screen
print $text;
}
}
+sub output_json {
+ my $info = $engine->{'info'};
+
+ my $json = {};
+ $json->{'position'} = $pos_calculating;
+ $json->{'id'} = $engine->{'id'};
+ $json->{'score'} = long_score($info, $pos_calculating, '');
+
+ $json->{'nodes'} = $info->{'nodes'};
+ $json->{'nps'} = $info->{'nps'};
+ $json->{'depth'} = $info->{'depth'};
+ $json->{'tbhits'} = $info->{'tbhits'};
+ $json->{'seldepth'} = $info->{'seldepth'};
+
+ # single-PV only for now
+ $json->{'pv_uci'} = $info->{'pv'};
+ $json->{'pv_pretty'} = [ prettyprint_pv($pos_calculating->{'board'}, @{$info->{'pv'}}) ];
+
+ my %refutation_lines = ();
+ my @refutation_lines = ();
+ if (defined($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 {
+ my $pv = $info->{'pv' . $mpv};
+ my $pretty_move = join('', prettyprint_pv($pos_calculating->{'board'}, $pv->[0]));
+ my @pretty_pv = prettyprint_pv($pos_calculating->{'board'}, @$pv);
+ $refutation_lines{$pv->[0]} = {
+ sort_key => $pretty_move,
+ depth => $info->{'depth' . $mpv},
+ score_sort_key => score_sort_key($info, $pos_calculating, $mpv, 0),
+ pretty_score => short_score($info, $pos_calculating, $mpv, 0),
+ pretty_move => $pretty_move,
+ pv_pretty => \@pretty_pv,
+ };
+ $refutation_lines{$pv->[0]}->{'pv_uci'} = $pv;
+ };
+ }
+ }
+ $json->{'refutation_lines'} = \%refutation_lines;
+
+ open my $fh, ">/srv/analysis.sesse.net/www/analysis.json.tmp"
+ or return;
+ print $fh JSON::XS::encode_json($json);
+ close $fh;
+ rename("/srv/analysis.sesse.net/www/analysis.json.tmp", "/srv/analysis.sesse.net/www/analysis.json");
+}
+
sub find_kings {
my $board = shift;
my ($wkr, $wkc, $bkr, $bkc);
sub uciprint {
my ($engine, $msg) = @_;
print { $engine->{'write'} } "$msg\n";
- print UCILOG localtime() . " => $msg\n";
+ print UCILOG localtime() . " $engine->{'tag'} => $msg\n";
}
sub short_score {
- my ($info, $pos, $mpv) = @_;
+ my ($info, $pos, $mpv, $invert) = @_;
+
+ $invert //= 0;
+ if ($pos->{'toplay'} eq 'B') {
+ $invert = !$invert;
+ }
if (defined($info->{'score_mate' . $mpv})) {
- return sprintf "M%3d", $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' . $mpv} * 0.01;
- if ($pos->{'toplay'} eq 'B') {
+ if ($score == 0) {
+ return " 0.00";
+ }
+ if ($invert) {
$score = -$score;
}
return sprintf "%+5.2f", $score;
return undef;
}
+sub score_sort_key {
+ my ($info, $pos, $mpv, $invert) = @_;
+
+ if (defined($info->{'score_mate' . $mpv})) {
+ if ($invert) {
+ return 99999 - $info->{'score_mate' . $mpv};
+ } else {
+ return -(99999 - $info->{'score_mate' . $mpv});
+ }
+ } else {
+ if (exists($info->{'score_cp' . $mpv})) {
+ my $score = $info->{'score_cp' . $mpv};
+ if ($invert) {
+ $score = -$score;
+ }
+ return $score;
+ }
+ }
+
+ return undef;
+}
+
sub long_score {
my ($info, $pos, $mpv) = @_;
} else {
if (exists($info->{'score_cp' . $mpv})) {
my $score = $info->{'score_cp' . $mpv} * 0.01;
+ if ($score == 0) {
+ return "Score: 0.00";
+ }
if ($pos->{'toplay'} eq 'B') {
$score = -$score;
}
}
sub open_engine {
- my $cmdline = shift;
+ my ($cmdline, $tag) = @_;
+
+ return undef if (!defined($cmdline));
+
my ($uciread, $uciwrite);
my $pid = IPC::Open2::open2($uciread, $uciwrite, $cmdline);
my $engine = {
pid => $pid,
read => $uciread,
+ readbuf => '',
write => $uciwrite,
info => {},
- ids => {}
+ ids => {},
+ tag => $tag,
};
uciprint($engine, "uci");
return $engine;
}
-sub read_line {
- my $fh = shift;
+sub read_lines {
+ my $engine = shift;
#
# Read until we've got a full line -- if the engine sends part of
# a line and then stops we're pretty much hosed, but that should
# never happen.
#
- my $line = '';
- while ($line !~ /\n/) {
+ while ($engine->{'readbuf'} !~ /\n/) {
my $tmp;
- my $ret = sysread $fh, $tmp, 1;
+ my $ret = sysread $engine->{'read'}, $tmp, 4096;
if (!defined($ret)) {
next if ($!{EINTR});
die "EOF from UCI engine";
}
- $line .= $tmp;
+ $engine->{'readbuf'} .= $tmp;
}
- $line =~ tr/\r\n//d;
- return $line;
+ # Blah.
+ my @lines = ();
+ while ($engine->{'readbuf'} =~ s/^([^\n]*)\n//) {
+ my $line = $1;
+ $line =~ tr/\r\n//d;
+ push @lines, $line;
+ }
+ return @lines;
}
sub col_letter_to_num {
projects / remoteglot / blobdiff