use IPC::Open2;
use Time::HiRes;
use JSON::XS;
+require 'Position.pm';
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";
-my $telltarget = undef; # undef to be silent
-my @tell_intervals = (5, 20, 60, 120, 240, 480, 960); # after each move
+my $engine2_cmdline = "./stockfish_13111119_x64_modern_sse42"; # undef for none
my $uci_assume_full_compliance = 0; # dangerous :-)
-my $update_max_interval = 2.0;
-my $second_engine_start_depth = 8;
+my $update_max_interval = 1.0;
my @masters = (
'Sesse',
'Sessse',
# open the chess engine
my $engine = open_engine($engine_cmdline, 'E1');
my $engine2 = open_engine($engine2_cmdline, 'E2');
-my ($last_move, $last_tell);
+my $last_move;
my $last_text = '';
-my $last_told_text = '';
-my ($pos_waiting, $pos_calculating, $move_calculating_second_engine);
-my %refutation_moves = ();
+my ($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($engine, "ucinewgame");
-uciprint($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");
+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";
my $rin = '';
my $rout;
vec($rin, fileno($engine->{'read'}), 1) = 1;
- vec($rin, fileno($engine2->{'read'}), 1) = 1;
+ if (defined($engine2)) {
+ vec($rin, fileno($engine2->{'read'}), 1) = 1;
+ }
vec($rin, fileno($t), 1) = 1;
my ($nfound, $timeleft) = select($rout=$rin, undef, undef, 5.0);
chomp $line;
$line =~ tr/\r//d;
if ($line =~ /^<12> /) {
- my $pos = style12_to_pos($line);
+ my $pos = Position->new($line);
# if this is already in the queue, ignore it
- next if (defined($pos_waiting) && $pos->{'fen'} eq $pos_waiting->{'fen'});
+ next if (defined($pos_waiting) && $pos->fen() eq $pos_waiting->fen());
# if we're already chewing on this and there's nothing else in the queue,
# also ignore it
next if (!defined($pos_waiting) && defined($pos_calculating) &&
- $pos->{'fen'} eq $pos_calculating->{'fen'});
+ $pos->fen() eq $pos_calculating->fen());
# if we're already thinking on something, stop and wait for the engine
# to approve
if ($uci_assume_full_compliance) {
$pos_waiting = $pos;
} else {
- uciprint($engine, "position fen " . $pos->{'fen'});
+ uciprint($engine, "position fen " . $pos->fen());
uciprint($engine, "go infinite");
$pos_calculating = $pos;
}
# it's wrong just to give the FEN (the move history is useful,
# and per the UCI spec, we should really have sent "ucinewgame"),
# but it's easier
- uciprint($engine, "position fen " . $pos->{'fen'});
+ uciprint($engine, "position fen " . $pos->fen());
uciprint($engine, "go infinite");
$pos_calculating = $pos;
}
- %refutation_moves = calculate_refutation_moves($pos);
- if (defined($move_calculating_second_engine)) {
- uciprint($engine2, "stop");
- $move_calculating_second_engine = undef;
- } else {
- give_new_move_to_second_engine($pos);
+ 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'} = {};
- $engine2->{'info'} = {};
$last_move = time;
#
output();
}
- if ($nfound > 0 && vec($rout, fileno($engine2->{'read'}), 1) == 1) {
+ if (defined($engine2) && $nfound > 0 && vec($rout, fileno($engine2->{'read'}), 1) == 1) {
my @lines = read_lines($engine2);
for my $line (@lines) {
next if $line =~ /(upper|lower)bound/;
if ($primary) {
return if (!$uci_assume_full_compliance);
if (defined($pos_waiting)) {
- uciprint($engine, "position fen " . $pos_waiting->{'fen'});
+ uciprint($engine, "position fen " . $pos_waiting->fen());
uciprint($engine, "go infinite");
$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);
+ $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)$/) {
}
}
-sub style12_to_pos {
- my $str = shift;
- my %pos = ();
- my (@x) = split / /, $str;
-
- $pos{'board'} = [ @x[1..8] ];
- $pos{'toplay'} = $x[9];
- $pos{'ep_file_num'} = $x[10];
- $pos{'white_castle_k'} = $x[11];
- $pos{'white_castle_q'} = $x[12];
- $pos{'black_castle_k'} = $x[13];
- $pos{'black_castle_q'} = $x[14];
- $pos{'time_to_100move_rule'} = $x[15];
- $pos{'move_num'} = $x[26];
- $pos{'last_move'} = $x[29];
- $pos{'fen'} = make_fen(\%pos);
-
- return \%pos;
-}
-
-sub make_fen {
- my $pos = shift;
-
- # the board itself
- my (@board) = @{$pos->{'board'}};
- for my $rank (0..7) {
- $board[$rank] =~ s/(-+)/length($1)/ge;
- }
- my $fen = join('/', @board);
-
- # white/black to move
- $fen .= " ";
- $fen .= lc($pos->{'toplay'});
-
- # castling
- my $castling = "";
- $castling .= "K" if ($pos->{'white_castle_k'} == 1);
- $castling .= "Q" if ($pos->{'white_castle_q'} == 1);
- $castling .= "k" if ($pos->{'black_castle_k'} == 1);
- $castling .= "q" if ($pos->{'black_castle_q'} == 1);
- $castling = "-" if ($castling eq "");
- # $castling = "-"; # chess960
- $fen .= " ";
- $fen .= $castling;
-
- # en passant
- my $ep = "-";
- if ($pos->{'ep_file_num'} != -1) {
- my $col = $pos->{'ep_file_num'};
- my $nep = (qw(a b c d e f g h))[$col];
-
- if ($pos->{'toplay'} eq 'B') {
- $nep .= "3";
- } else {
- $nep .= "6";
- }
-
- #
- # Showing the en passant square when actually no capture can be made
- # seems to confuse at least Rybka. Thus, check if there's actually
- # a pawn of the opposite side that can do the en passant move, and if
- # not, just lie -- it doesn't matter anyway. I'm unsure what's the
- # "right" thing as per the standard, though.
- #
- if ($pos->{'toplay'} eq 'B') {
- $ep = $nep if ($col > 0 && substr($pos->{'board'}[4], $col-1, 1) eq 'p');
- $ep = $nep if ($col < 7 && substr($pos->{'board'}[4], $col+1, 1) eq 'p');
- } else {
- $ep = $nep if ($col > 0 && substr($pos->{'board'}[3], $col-1, 1) eq 'P');
- $ep = $nep if ($col < 7 && substr($pos->{'board'}[3], $col+1, 1) eq 'P');
- }
- }
- $fen .= " ";
- $fen .= $ep;
-
- # half-move clock
- $fen .= " ";
- $fen .= $pos->{'time_to_100move_rule'};
-
- # full-move clock
- $fen .= " ";
- $fen .= $pos->{'move_num'};
-
- return $fen;
-}
-
-sub make_move {
- my ($board, $from_row, $from_col, $to_row, $to_col, $promo) = @_;
- my $move = move_to_uci_notation($from_row, $from_col, $to_row, $to_col, $promo);
- my $piece = substr($board->[$from_row], $from_col, 1);
- my @nb = @$board;
-
- if ($piece eq '-') {
- die "Invalid move $move";
- }
-
- # white short castling
- if ($move eq 'e1g1' && $piece eq 'K') {
- # king
- substr($nb[7], 4, 1, '-');
- substr($nb[7], 6, 1, $piece);
-
- # rook
- substr($nb[7], 7, 1, '-');
- substr($nb[7], 5, 1, 'R');
-
- return \@nb;
- }
-
- # white long castling
- if ($move eq 'e1c1' && $piece eq 'K') {
- # king
- substr($nb[7], 4, 1, '-');
- substr($nb[7], 2, 1, $piece);
-
- # rook
- substr($nb[7], 0, 1, '-');
- substr($nb[7], 3, 1, 'R');
-
- return \@nb;
- }
-
- # black short castling
- if ($move eq 'e8g8' && $piece eq 'k') {
- # king
- substr($nb[0], 4, 1, '-');
- substr($nb[0], 6, 1, $piece);
-
- # rook
- substr($nb[0], 7, 1, '-');
- substr($nb[0], 5, 1, 'r');
-
- return \@nb;
- }
-
- # black long castling
- if ($move eq 'e8c8' && $piece eq 'k') {
- # king
- substr($nb[0], 4, 1, '-');
- substr($nb[0], 2, 1, $piece);
-
- # rook
- substr($nb[0], 0, 1, '-');
- substr($nb[0], 3, 1, 'r');
-
- return \@nb;
- }
-
- # check if the from-piece is a pawn
- if (lc($piece) eq 'p') {
- # attack?
- if ($from_col != $to_col) {
- # en passant?
- if (substr($board->[$to_row], $to_col, 1) eq '-') {
- if ($piece eq 'p') {
- substr($nb[$to_row + 1], $to_col, 1, '-');
- } else {
- substr($nb[$to_row - 1], $to_col, 1, '-');
- }
- }
- } else {
- if ($promo ne '') {
- if ($piece eq 'p') {
- $piece = $promo;
- } else {
- $piece = uc($promo);
- }
- }
- }
- }
-
- # update the board
- substr($nb[$from_row], $from_col, 1, '-');
- substr($nb[$to_row], $to_col, 1, $piece);
-
- return \@nb;
-}
-
sub prettyprint_pv {
my ($board, @pvs) = @_;
my $to_row = row_letter_to_num(substr($pv, 3, 1));
my $promo = substr($pv, 4, 1);
- my $nb = make_move($board, $from_row, $from_col, $to_row, $to_col, $promo);
- my $piece = substr($board->[$from_row], $from_col, 1);
+ my $nb = $board->make_move($from_row, $from_col, $to_row, $to_col, $promo);
+ my $piece = $board->[$from_row][$from_col];
if ($piece eq '-') {
die "Invalid move $pv";
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, $to_col));
+ next unless ($board->[$row][$col] eq $piece);
+ ++$num_total if ($board->can_reach($piece, $row, $col, $to_row, $to_col));
}
}
# 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, $to_col));
+ next unless ($board->[$from_row][$col] eq $piece);
+ ++$num_row if ($board->can_reach($piece, $from_row, $col, $to_row, $to_col));
}
# 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, $to_col));
+ next unless ($board->[$row][$from_col] eq $piece);
+ ++$num_col if ($board->can_reach($piece, $row, $from_col, $to_row, $to_col));
}
# see if we need to disambiguate
}
# attack?
- if (substr($board->[$to_row], $to_col, 1) ne '-') {
+ if ($board->[$to_row][$to_col] ne '-') {
$pretty .= 'x';
}
$pretty .= substr($pv, 2, 2);
}
- if (in_mate($nb)) {
+ if ($nb->in_mate()) {
$pretty .= '#';
- } elsif (in_check($nb) ne 'none') {
+ } elsif ($nb->in_check() ne 'none') {
$pretty .= '+';
}
return ($pretty, prettyprint_pv($nb, @pvs));
}
if (exists($info->{'tbhits'}) && $info->{'tbhits'} > 0) {
if ($info->{'tbhits'} == 1) {
- $text .= ", one Nalimov hit";
+ $text .= ", one Syzygy hit";
} else {
- $text .= sprintf ", %u Nalimov hits", $info->{'tbhits'};
+ $text .= sprintf ", %u Syzygy hits", $info->{'tbhits'};
}
}
$text .= "\n\n";
}
- #$text .= book_info($pos_calculating->{'fen'}, $pos_calculating->{'board'}, $pos_calculating->{'toplay'});
+ #$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, $line ];
- };
+ if (defined($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) {
print $text;
$last_text = $text;
}
-
- # Now construct the tell text, if any
- return if (!defined($telltarget));
-
- my $tell_text = '';
-
- if (exists($id->{'name'})) {
- $tell_text .= "Analysis by $id->{'name'} -- see http://analysis.sesse.net/ for more information\n";
- } else {
- $tell_text .= "Computer analysis -- http://analysis.sesse.net/ for more information\n";
- }
-
- if (exists($info->{'pv1'}) && exists($info->{'pv2'})) {
- # multi-PV
- my $mpv = 1;
- while (exists($info->{'pv' . $mpv})) {
- $tell_text .= sprintf " PV%2u", $mpv;
- my $score = short_score($info, $pos_calculating, $mpv);
- $tell_text .= " ($score)" if (defined($score));
-
- if (exists($info->{'depth' . $mpv})) {
- $tell_text .= sprintf " (%2u ply)", $info->{'depth' . $mpv};
- }
-
- $tell_text .= ": ";
- $tell_text .= join(', ', prettyprint_pv($pos_calculating->{'board'}, @{$info->{'pv' . $mpv}}));
- $tell_text .= "\n";
- ++$mpv;
- }
- } else {
- # single-PV
- my $score = long_score($info, $pos_calculating, '');
- $tell_text .= " $score\n" if defined($score);
- $tell_text .= " PV: " . join(', ', prettyprint_pv($pos_calculating->{'board'}, @{$info->{'pv'}}));
- if (exists($info->{'depth'})) {
- $tell_text .= sprintf " (depth %u ply)", $info->{'depth'};
- }
- $tell_text .= "\n";
- }
-
- # see if a new tell is called for -- it is if the delay has expired _and_
- # this is not simply a repetition of the last one
- if ($last_told_text ne $tell_text) {
- my $now = time;
- for my $iv (@tell_intervals) {
- last if ($now - $last_move < $iv);
- next if ($last_tell - $last_move >= $iv);
-
- for my $line (split /\n/, $tell_text) {
- $t->print("tell $telltarget [$target] $line");
- }
-
- $last_told_text = $text;
- $last_tell = $now;
-
- last;
- }
- }
}
sub output_json {
my $info = $engine->{'info'};
my $json = {};
- $json->{'position'} = $pos_calculating;
+ $json->{'position'} = $pos_calculating->to_json_hash();
$json->{'id'} = $engine->{'id'};
$json->{'score'} = long_score($info, $pos_calculating, '');
$json->{'pv_pretty'} = [ prettyprint_pv($pos_calculating->{'board'}, @{$info->{'pv'}}) ];
my %refutation_lines = ();
- for my $move (keys %refutation_moves) {
- my $m = $refutation_moves{$move};
- my $pretty_move = "";
- my @pretty_pv = ();
- eval {
- $pretty_move = join('', prettyprint_pv($pos_calculating->{'board'}, $move));
- @pretty_pv = prettyprint_pv($pos_calculating->{'board'}, $move, @{$m->{'pv'}});
- };
- $refutation_lines{$move} = {
- sort_key => $pretty_move,
- depth => $m->{'depth'},
- score_sort_key => score_sort_key($refutation_moves{$move}, $pos_calculating, '', 1),
- pretty_score => short_score($refutation_moves{$move}, $pos_calculating, '', 1),
- pretty_move => $pretty_move,
- pv_pretty => \@pretty_pv,
- };
- eval {
- $refutation_lines{$move}->{'pv_uci'} = [ $move, @{$m->{'pv'}} ];
- };
+ 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, ">analysis.json.tmp"
+ open my $fh, ">/srv/analysis.sesse.net/www/analysis.json.tmp"
or return;
print $fh JSON::XS::encode_json($json);
close $fh;
- rename("analysis.json.tmp", "analysis.json");
-}
-
-sub find_kings {
- my $board = shift;
- my ($wkr, $wkc, $bkr, $bkc);
-
- 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, $col);
- }
- }
- }
-
- return ($wkr, $wkc, $bkr, $bkc);
-}
-
-sub in_mate {
- my $board = shift;
- my $check = in_check($board);
- return 0 if ($check eq 'none');
-
- # 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 '-');
-
- if ($check eq 'white') {
- next if ($piece eq lc($piece));
- } else {
- next if ($piece eq uc($piece));
- }
-
- 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, $dest_col));
-
- my @nb = @$board;
- substr($nb[$row], $col, 1, '-');
- substr($nb[$dest_row], $dest_col, 1, $piece);
-
- my $new_check = in_check(\@nb);
- return 0 if ($new_check ne $check && $new_check ne 'both');
- }
- }
- }
- }
-
- # nothing to do; mate
- return 1;
-}
-
-sub in_check {
- my $board = shift;
- my ($black_check, $white_check) = (0, 0);
-
- my ($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 '-');
-
- if (uc($piece) eq $piece) {
- # white piece
- $black_check = 1 if (can_reach($board, $piece, $row, $col, $bkr, $bkc));
- } else {
- # black piece
- $white_check = 1 if (can_reach($board, $piece, $row, $col, $wkr, $wkc));
- }
- }
- }
-
- if ($black_check && $white_check) {
- return 'both';
- } elsif ($black_check) {
- return 'black';
- } elsif ($white_check) {
- return 'white';
- } else {
- return 'none';
- }
-}
-
-sub can_reach {
- my ($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)));
- }
-
- if (lc($piece) eq 'k') {
- return (abs($from_row - $to_row) <= 1 && abs($from_col - $to_col) <= 1);
- }
- if (lc($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);
- }
-
- for my $c (($from_col+1)..($to_col-1)) {
- my $middle_piece = substr($board->[$to_row], $c, 1);
- return 0 if ($middle_piece ne '-');
- }
-
- return 1;
- } 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 1;
- }
- }
- 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);
-
- my $r = $from_row + $dr;
- my $c = $from_col + $dc;
-
- while ($r != $to_row) {
- my $middle_piece = substr($board->[$r], $c, 1);
- return 0 if ($middle_piece ne '-');
-
- $r += $dr;
- $c += $dc;
- }
-
- return 1;
- }
- if (lc($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 && $diff_c == 2);
- return 0;
- }
- if ($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, $to_col));
- }
- if ($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, $to_col));
- }
-
- # TODO: en passant
- if ($piece eq 'p') {
- # black pawn
- if ($to_col == $from_col && $to_row == $from_row + 1) {
- return ($dest_piece eq '-');
- }
- if ($to_col == $from_col && $from_row == 1 && $to_row == 3) {
- my $middle_piece = substr($board->[2], $to_col, 1);
- return ($dest_piece eq '-' && $middle_piece eq '-');
- }
- if (abs($to_col - $from_col) == 1 && $to_row == $from_row + 1) {
- return ($dest_piece ne '-');
- }
- return 0;
- }
- if ($piece eq 'P') {
- # white pawn
- if ($to_col == $from_col && $to_row == $from_row - 1) {
- return ($dest_piece eq '-');
- }
- if ($to_col == $from_col && $from_row == 6 && $to_row == 4) {
- my $middle_piece = substr($board->[5], $to_col, 1);
- return ($dest_piece eq '-' && $middle_piece eq '-');
- }
- if (abs($to_col - $from_col) == 1 && $to_row == $from_row - 1) {
- return ($dest_piece ne '-');
- }
- return 0;
- }
-
- # unknown piece
- return 0;
+ rename("/srv/analysis.sesse.net/www/analysis.json.tmp", "/srv/analysis.sesse.net/www/analysis.json");
}
sub uciprint {
if (defined($info->{'score_mate' . $mpv})) {
if ($invert) {
- return -(99999 - $info->{'score_mate' . $mpv});
- } else {
return 99999 - $info->{'score_mate' . $mpv};
+ } else {
+ return -(99999 - $info->{'score_mate' . $mpv});
}
} else {
if (exists($info->{'score_cp' . $mpv})) {
} else {
if (exists($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, $tag) = @_;
+
+ return undef if (!defined($cmdline));
+
my ($uciread, $uciwrite);
my $pid = IPC::Open2::open2($uciread, $uciwrite, $cmdline);
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'} == $best->{'depth'} && score_sort_key($this, $pos, '', 1) > score_sort_key($best, $pos, '', 1))) {
- $best_move = $move;
- next;
- }
- }
-
- 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 = $best_move;
-}
-
sub col_letter_to_num {
return ord(shift) - ord('a');
}
return 7 - (ord(shift) - ord('1'));
}
-sub move_to_uci_notation {
- my ($from_row, $from_col, $to_row, $to_col, $promo) = @_;
- $promo //= "";
- return sprintf("%c%d%c%d%s", ord('a') + $from_col, 8 - $from_row, ord('a') + $to_col, 8 - $to_row, $promo);
-}
projects / remoteglot / blobdiff