my $server = "freechess.org";
my $target = "GMCarlsen";
my $engine_cmdline = "'./Deep Rybka 4 SSE42 x64'";
+my $engine2_cmdline = "./stockfish_13111119_x64_modern_sse42";
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 = 2.0;
+my $second_engine_start_depth = 8;
my @masters = (
'Sesse',
'Sessse',
# Program starts here
$SIG{ALRM} = sub { output_screen(); };
+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, $move_calculating_second_engine);
+my %refutation_moves = ();
uciprint($engine, "setoption name UCI_AnalyseMode value true");
# uciprint($engine, "setoption name NalimovPath value /srv/tablebase");
# uciprint($engine, "setoption name MultiPV value 2");
uciprint($engine, "ucinewgame");
+uciprint($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($engine2, "setoption name MultiPV value 2");
+uciprint($engine2, "ucinewgame");
+
print "Chess engine ready.\n";
# now talk to FICS
my $rin = '';
my $rout;
vec($rin, fileno($engine->{'read'}), 1) = 1;
+ vec($rin, fileno($engine2->{'read'}), 1) = 1;
vec($rin, fileno($t), 1) = 1;
my ($nfound, $timeleft) = select($rout=$rin, undef, undef, 5.0);
$pos_calculating = $pos;
}
- %uciinfo = ();
+ %refutation_moves = calculate_refutation_moves($pos);
+ if (defined($move_calculating_second_engine)) {
+ uciprint($engine2, "stop");
+ $move_calculating_second_engine = undef;
+ } else {
+ give_new_move_to_second_engine($pos);
+ }
+
$engine->{'info'} = {};
+ $engine2->{'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);
+ }
$sleep = 0;
- # don't update too often
- Time::HiRes::alarm(0.2);
+ output_screen();
+ }
+ if ($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_screen();
}
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;
+ $pos_waiting = undef;
+ }
+ } else {
+ if (defined($move_calculating_second_engine)) {
+ my $move = $refutation_moves{$move_calculating_second_engine};
+ $move->{'pv'} = $engine->{'info'}{'pv'} // $engine->{'info'}{'pv1'};
+ $move->{'score_cp'} = $engine->{'info'}{'score_cp'} // $engine->{'info'}{'score_cp1'} // 0;
+ $move->{'score_mate'} = $engine->{'info'}{'score_mate'} // $engine->{'info'}{'score_mate1'};
+ $move->{'toplay'} = $pos_calculating->{'toplay'};
+ }
+ give_new_move_to_second_engine($pos_waiting // $pos_calculating);
}
}
}
sub output_screen {
#return;
-
+
return if (!defined($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;
+ }
+ $latest_update = [Time::HiRes::gettimeofday];
+
my $info = $engine->{'info'};
my $id = $engine->{'id'};
#
if (exists($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->{$key})) {
+ if (exists($info->{$key . '1'})) {
$info->{$key} = $info->{$key . '1'};
}
}
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 = ();
+ for my $move (keys %refutation_moves) {
+ eval {
+ my $m = $refutation_moves{$move};
+ die if ($m->{'depth'} < $second_engine_start_depth);
+ my $pretty_move = join('', prettyprint_pv($pos_calculating->{'board'}, $move));
+ my @pretty_pv = prettyprint_pv($pos_calculating->{'board'}, $move, @{$m->{'pv'}});
+ if (scalar @pretty_pv > 5) {
+ @pretty_pv = @pretty_pv[0..4];
+ push @pretty_pv, "...";
+ }
+ #my $key = score_sort_key($refutation_moves{$move}, $pos_calculating, '', 1);
+ my $key = $pretty_move;
+ my $line = sprintf(" %-6s %6s %3s %s",
+ $pretty_move,
+ short_score($refutation_moves{$move}, $pos_calculating, '', 1),
+ "d" . $m->{'depth'},
+ 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 $text;
sub uciprint {
my ($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) = @_;
+
+ $invert //= 0;
+ if ($pos->{'toplay'} eq 'B') {
+ $invert = !$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' . $mpv};
+ if ($score == 0) {
+ return " 0.00";
+ }
+ if ($invert) {
+ $score = -$score;
+ }
+ return $score;
+ }
+ }
+
+ return undef;
+}
+
sub long_score {
my ($info, $pos, $mpv) = @_;
}
sub open_engine {
- my $cmdline = shift;
+ my ($cmdline, $tag) = @_;
my ($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'} .= $tmp;
+ }
+
+ # Blah.
+ my @lines = ();
+ while ($engine->{'readbuf'} =~ s/^([^\n]*)\n//) {
+ my $line = $1;
+ $line =~ tr/\r\n//d;
+ push @lines, $line;
+ }
+ return @lines;
+}
+
+# Find all possible legal moves.
+sub calculate_refutation_moves {
+ my $pos = shift;
+ my $board = $pos->{'board'};
+ my %refutation_moves = ();
+ for my $col (0..7) {
+ for my $row (0..7) {
+ my $piece = substr($board->[$row], $col, 1);
+
+ # Check that there's a piece of the right color on this square.
+ next if ($piece eq '-');
+ if ($pos->{'toplay'} eq 'W') {
+ next if ($piece ne uc($piece));
+ } else {
+ next if ($piece ne lc($piece));
+ }
+
+ for my $to_col (0..7) {
+ for my $to_row (0..7) {
+ next if ($col == $to_col && $row == $to_row);
+ next unless (can_reach($board, $piece, $row, $col, $to_row, $to_col));
+
+ my $promo = ""; # FIXME
+ my $nb = make_move($board, $row, $col, $to_row, $to_col, $promo);
+ my $check = in_check($nb);
+ next if ($check eq 'both');
+ if ($pos->{'toplay'} eq 'W') {
+ next if ($check eq 'white');
+ } else {
+ next if ($check eq 'black');
+ }
+ my $move = move_to_uci_notation($row, $col, $to_row, $to_col, $promo);
+ $refutation_moves{$move} = { depth => $second_engine_start_depth - 1, score_cp => 0, pv => '' };
+ }
+ }
+ }
+ }
+ return %refutation_moves;
+}
+
+sub give_new_move_to_second_engine {
+ my $pos = shift;
+
+ # Find the move that's been analyzed the shortest but is most promising.
+ # Tie-break on UCI move representation.
+ my $best_move = undef;
+ for my $move (sort keys %refutation_moves) {
+ if (!defined($best_move)) {
+ $best_move = $move;
+ next;
+ }
+ my $best = $refutation_moves{$best_move};
+ my $this = $refutation_moves{$move};
+
+ if ($this->{'depth'} < $best->{'depth'} ||
+ ($this->{'depth'} == $best->{'depth'} && $this->{'score_cp'} < $best->{'score_cp'})) {
+ $best_move = $move;
+ next;
+ }
}
- $line =~ tr/\r\n//d;
- return $line;
+ my $m = $refutation_moves{$best_move};
+ ++$m->{'depth'};
+ uciprint($engine2, "position fen " . $pos->{'fen'} . " moves " . $best_move);
+ uciprint($engine2, "go depth " . $m->{'depth'});
+ $move_calculating_second_engine = $best_move;
}
sub col_letter_to_num {
projects / remoteglot / blobdiff