diff --git a/src/algorithms/profile.py b/src/algorithms/profile.py
index 457edac..0a71a64 100644
--- a/src/algorithms/profile.py
+++ b/src/algorithms/profile.py
@@ -7,7 +7,7 @@ from src.net import NetGame
 
 
 def test_run(i: int) -> float:
-    game = NetGame(5, 5, i)
+    game = NetGame(11, 11, i)
     solver = WFCSolver(game)
     a = time.perf_counter()
     for _ in solver.solve():
diff --git a/src/algorithms/wfc.py b/src/algorithms/wfc.py
index a4d7508..6da1a82 100644
--- a/src/algorithms/wfc.py
+++ b/src/algorithms/wfc.py
@@ -1,9 +1,21 @@
 from collections.abc import Generator
+from copy import deepcopy
 from dataclasses import dataclass
 from enum import Enum, auto
 from src.netTypes import Direction, PieceType
 from src.net import NetGame
 
+type RollbackType = list[
+    tuple[
+        list[tuple[int, int]],
+        list[list[Direction]],
+        set[Direction],
+        int,
+        int,
+        list[list[PieceConnectionState]],
+    ]
+]
+
 
 class ConnectionState(Enum):
     DISCONNECTED = auto()
@@ -73,9 +85,16 @@ class WFCSolver:
 
     def get_possible_corner_directions(self, x: int, y: int) -> set[Direction]:
         cstates = self.connection_states[x][y]
-        connected = cstates.connected_or_unknown()
-        possible = connected.copy()
-        possible.update(map(lambda d: Direction((d - 1) % 4), connected))
+        connected = cstates.directions_with_state(ConnectionState.CONNECTED)
+        if connected:
+            possible = {Direction.UP, Direction.DOWN, Direction.LEFT, Direction.RIGHT}
+            for direction in connected:
+                possible.intersection_update(
+                    {direction, Direction((direction - 1) % 4)}
+                )
+        else:
+            possible = cstates.directions_with_state(ConnectionState.UNKNOWN)
+            possible.update(map(lambda d: Direction((d - 1) % 4), possible.copy()))
         disconnected = cstates.directions_with_state(ConnectionState.DISCONNECTED)
         possible.difference_update(disconnected)
         possible.difference_update(map(lambda d: Direction((d - 1) % 4), disconnected))
@@ -117,20 +136,44 @@ class WFCSolver:
                     )
                 return possible
 
+    def get_field_rotations(self) -> list[list[Direction]]:
+        return [[p.direction for p in col] for col in self.game.get_field()]
+
+    def set_field_rotations(self, rotations: list[list[Direction]]):
+        for x, col in enumerate(rotations):
+            for y, d in enumerate(col):
+                self.game.set_direction(x, y, d)
+
     def solve(self) -> Generator[None]:
         unfixed = list(
             ((i, j) for i in range(self.game.width) for j in range(self.game.height))
         )
+        rollback: RollbackType = []
         while not self.game.solved():
             yield
-            (x, y) = min(unfixed, key=lambda t: len(self.get_possible_directions(*t)))
-            if len(self.get_possible_directions(x, y)) == 0:
-                raise NotImplementedError(
-                    "Irgendwo eine falsche Richtung gewählt, muss diese Logik noch schreiben"
+            if len(unfixed) == 0:
+                unfixed, rotations, dirs, x, y, self.connection_states = rollback.pop()
+                self.set_field_rotations(rotations)
+            else:
+                (x, y) = min(
+                    unfixed, key=lambda t: len(self.get_possible_directions(*t))
+                )
+                dirs = self.get_possible_directions(x, y)
+            if len(dirs) == 0:
+                unfixed, rotations, dirs, x, y, self.connection_states = rollback.pop()
+                self.set_field_rotations(rotations)
+            direction = dirs.pop()
+            if len(dirs) > 0:
+                rollback.append(
+                    (
+                        unfixed.copy(),
+                        self.get_field_rotations(),
+                        dirs,
+                        x,
+                        y,
+                        deepcopy(self.connection_states),
+                    )
                 )
-            if len(self.get_possible_directions(x, y)) > 1:
-                print("AAAAAAAA")
-            direction = self.get_possible_directions(x, y).pop()
             self.game.set_direction(x, y, direction)
             self.game.lock(x, y)
             unfixed.remove((x, y))
diff --git a/src/net.py b/src/net.py
index 1795991..fec28e8 100644
--- a/src/net.py
+++ b/src/net.py
@@ -20,10 +20,11 @@ class Grid:
             raise ValueError("Feldgrösse nicht erlaubt")
         with open(f"descriptions/{width}x{height}.txt") as f:
             lines = f.readlines()
-            if specific:
+            if specific is not None:
                 selected = lines[specific].strip()
             else:
                 selected = choice(lines).strip()
+                print(f"Seed: {lines.index(selected + "\n")}")
         self.pieces = parse_description(selected)
 
     def neighbors(self, x: int, y: int) -> list[Coordinate]: