diff --git a/Source/header/solve.h b/Source/header/solve.h
index 347119b..47ade58 100755
--- a/Source/header/solve.h
+++ b/Source/header/solve.h
@@ -42,6 +42,7 @@ public:
 
     Puzzle(unsigned int newcols,unsigned int newrows):rows(newrows),cols(newcols)
     {
+        a1.PreProcessing({rows,cols}, nullptr);
         a1.InitialiseConstraintMatrixSize(newcols+2, newrows+2);
         a1.setEdgeZero();
     }
@@ -49,7 +50,7 @@ public:
     coor getSizeAsCoor()
     {return {cols,rows};}
 
-    DestructionPower dp;
+    DestructionPower* dp;
     AbstractionLayer_1 a1;
 
     void removeConstrains(coor removeCoordinates);