Commiting wrongly on this branch to cherry-pick

src/player/malte/Pattern.java

@@ -52,6 +52,9 @@ public class Pattern {
             maxUp = 0,
             maxDown = 0;
         for (Item i: parts) {
+            if (i.hasID(-1)) {
+                continue;
+            }
             if (maxLeft < -i.getPosX()) {
                 maxLeft = -i.getPosX();
             }
@@ -72,7 +75,10 @@ public class Pattern {
                 for (Item k: parts) {
                     int posX = i + k.getPosX();
                     int posY = j + k.getPosY();
-                    if (!k.hasID(board[posX][posY])) {
+                    if ((!isOnBoard(new Position(posX, posY)) &&
+                         !k.hasID(-1)) ||
+                        (isOnBoard(new Position(posX, posY)) &&
+                         !k.hasID(board[posX][posY]))) {
                         continue inner;
                     }
                 }
@@ -82,6 +88,22 @@ public class Pattern {
         return set;
     }
 
+    /**
+     * Is the given position on the Board.
+     *
+     * @param pos The position to check.
+     * @return Whether the position is on the board.
+     */
+    private boolean isOnBoard(Position pos) {
+        if (pos.getPosX() < 0 ||
+            pos.getPosX() > Game.GAME_COLUMNS - 1 ||
+            pos.getPosY() < 0 ||
+            pos.getPosY() > Game.GAME_ROWS - 1) {
+            return false;
+        }
+        return true;
+    }
+
     /**
      * Replaces a part of the Pattern.
      *

src/player/malte/PatternGenerator.java

@@ -68,7 +68,7 @@ public class PatternGenerator {
             // Replace one item with the new 0-one.
             newP.replaceItem(x, newI);
             // Add the support.
-            newP.addItem(new Item(x.getPosX(), x.getPosY() + 1, new int[]{1, 2}));
+            newP.addItem(new Item(x.getPosX(), x.getPosY() + 1, new int[]{-1, 1, 2}));
             // Add the pattern to the set.
             ret.add(newP);
         }