X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=Board.pm;h=d6a0f5524869360b4f171f226aa17086fb34c8da;hb=aab426550a1da4daea35eb0b0691fe8bd7907348;hp=1838f7dd492846c858cdc10f5c66707311c89f09;hpb=11d3528406bfcbb3f97780d4b2af571c0b3f6299;p=remoteglot

diff --git a/Board.pm b/Board.pm
index 1838f7d..d6a0f55 100644
--- a/Board.pm
+++ b/Board.pm
@@ -103,20 +103,19 @@ sub make_move {
 			# en passant?
 			if ($board->[$to_row][$to_col] eq '-') {
 				if ($piece eq 'p') {
-					$nb->[$to_row + 1][$to_col] = '-';
-				} else {
 					$nb->[$to_row - 1][$to_col] = '-';
-				}
-			}
-		} else {
-			if (defined($promo) && $promo ne '') {
-				if ($piece eq 'p') {
-					$piece = $promo;
 				} else {
-					$piece = uc($promo);
+					$nb->[$to_row + 1][$to_col] = '-';
 				}
 			}
 		}
+		if (defined($promo) && $promo ne '') {
+			if ($piece eq 'p') {
+				$piece = lc($promo);
+			} else {
+				$piece = uc($promo);
+			}
+		}
 	}
 
 	# update the board
@@ -298,7 +297,6 @@ sub can_reach {
 		        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 == $from_row + 1) {
@@ -309,7 +307,12 @@ sub can_reach {
 			return ($dest_piece eq '-' && $middle_piece eq '-');
 		}
 		if (abs($to_col - $from_col) == 1 && $to_row == $from_row + 1) {
-			return ($dest_piece ne '-');
+			if ($dest_piece eq '-') {
+				# En passant. TODO: check that the last move was indeed an EP move
+				return ($to_row == 5 && $board->[4][$to_col] eq 'P');
+			} else {
+				return 1;
+			}
 		}
 		return 0;
 	}
@@ -323,7 +326,12 @@ sub can_reach {
 			return ($dest_piece eq '-' && $middle_piece eq '-');
 		}
 		if (abs($to_col - $from_col) == 1 && $to_row == $from_row - 1) {
-			return ($dest_piece ne '-');
+			if ($dest_piece eq '-') {
+				# En passant. TODO: check that the last move was indeed an EP move
+				return ($to_row == 2 && $board->[3][$to_col] eq 'p');
+			} else {
+				return 1;
+			}
 		}
 		return 0;
 	}