X-Git-Url: https://git.sesse.net/?p=remoteglot;a=blobdiff_plain;f=Board.pm;h=8565c845c279860abf9e029b2abbc50b5b597398;hp=783aef09df46c2ef2674c390eca3d861ead36e85;hb=b4059a786029132eb27769a42ca52eca6d8b44cc;hpb=3ba7d7aa2f94b7be3cc1d4b6b19f11cb390ae77f

diff --git a/Board.pm b/Board.pm
index 783aef0..8565c84 100644
--- a/Board.pm
+++ b/Board.pm
@@ -43,57 +43,55 @@ sub make_move {
 	}
 
 	if ($piece eq 'K') {
+		# Convert to Chess960 king-takes-rook.
+		$to_col = 7 if ($move eq 'e1g1');
+		$to_col = 0 if ($move eq 'e1c1');
+
 		my $dst_piece = $board->[$to_row][$to_col];
 
-		# White short castling (regular or Chess960 king-takes-rook)
-		if ($move eq 'e1g1' || $dst_piece eq 'R') {
+		# White short castling.
+		if ($dst_piece eq 'R' && $to_col > $from_col) {
 			# king
 			$nb->[7][$from_col] = '-';
-			$nb->[7][6] = $piece;
-
-			# rook
 			$nb->[7][$to_col] = '-';
+			$nb->[7][6] = 'K';
 			$nb->[7][5] = 'R';
 
 			return $nb;
 		}
 
-		# White long castling (regular or Chess960 king-takes-rook)
-		if ($move eq 'e1c1' || $dst_piece eq 'R') {
-			# king
+		# Black short castling.
+		if ($dst_piece eq 'R' && $to_col < $from_col) {
 			$nb->[7][$from_col] = '-';
-			$nb->[7][2] = $piece;
-
-			# rook
 			$nb->[7][$to_col] = '-';
+			$nb->[7][2] = 'K';
 			$nb->[7][3] = 'R';
 
 			return $nb;
 		}
 	} elsif ($piece eq 'k') {
-		my $dst_piece = $board->[$to_row][$to_col];
+		# Convert to Chess960 king-takes-rook.
+		$to_col = 7 if ($move eq 'e8g8');
+		$to_col = 0 if ($move eq 'e8c8');
 
-		# Black short castling (regular or Chess960 king-takes-rook)
-		if ($move eq 'e8g8' || $dst_piece eq 'r') {
-			# king
-			$nb->[0][$from_col] = '-';
-			$nb->[0][6] = $piece;
+		my $dst_piece = $board->[$to_row][$to_col];
 
-			# rook
+		# Black short castling.
+		if ($dst_piece eq 'r' && $to_col > $from_col) {
 			$nb->[0][$from_col] = '-';
+			$nb->[0][$to_col] = '-';
+			$nb->[0][6] = 'k';
 			$nb->[0][5] = 'r';
 
 			return $nb;
 		}
 
-		# black long castling
-		if ($move eq 'e8c8' || $dst_piece eq 'r') {
+		# Black long castling.
+		if ($dst_piece eq 'r' && $to_col < $from_col) {
 			# king
 			$nb->[0][$from_col] = '-';
-			$nb->[0][2] = $piece;
-
-			# rook
 			$nb->[0][$to_col] = '-';
+			$nb->[0][2] = 'k';
 			$nb->[0][3] = 'r';
 
 			return $nb;