Made it work, working sequence in main

board_actions.py

@@ -90,12 +90,14 @@ class MoveAction:
             assert action_board.field[source][stack_offset] == card
 
         if action_board.field[dest]:
-            dest_card = action_board.field[dest]
+            dest_card = action_board.field[dest][-1]
             if not isinstance(dest_card, board.NumberCard):
                 raise AssertionError()
-            if dest_card.suit != self.cards[0].suit:
+            if not all(isinstance(x, board.NumberCard) for x in self.cards):
                 raise AssertionError()
-            if dest_card.number + 1 == self.cards[0].number:
+            if dest_card.suit == self.cards[0].suit:
+                raise AssertionError()
+            if dest_card.number != self.cards[0].number + 1:
                 raise AssertionError()
 
         action_board.field[source] = action_board.field[source][: -len(self.cards)]
@@ -160,7 +162,7 @@ class HuaKillAction:
     def apply(self, action_board: board.Board) -> None:
         """Do action"""
         assert not action_board.flowerGone
-        assert action_board.field[self.source_field_id] == board.SpecialCard.Hua
+        assert action_board.field[self.source_field_id][-1] == board.SpecialCard.Hua
         action_board.field[self.source_field_id].pop()
         action_board.flowerGone = True
 

board_possibilities.py

@@ -1,5 +1,5 @@
 """Contains function to iterate different kinds of possible actions"""
-from typing import Iterator
+from typing import Iterator, List, Tuple
 import board
 import board_actions
 
@@ -9,7 +9,7 @@ def possible_huakill_action(
 ) -> Iterator[board_actions.HuaKillAction]:
     """Check if the flowercard can be eliminated"""
     for index, stack in enumerate(search_board.field):
-        if stack[-1] == board.SpecialCard.Hua:
+        if stack and stack[-1] == board.SpecialCard.Hua:
             yield board_actions.HuaKillAction(source_field_id=index)
 
 
@@ -120,29 +120,54 @@ def possible_goal_move_actions(
             yield board_actions.GoalAction(
                 card=stack, source_id=index, source_position=source
             )
-        break
+            break
+
+
+def _can_stack(bottom: board.Card, top: board.Card) -> bool:
+    if not isinstance(bottom, board.NumberCard):
+        return False
+    if not isinstance(top, board.NumberCard):
+        return False
+    if bottom.suit == top.suit:
+        return False
+    if bottom.number != top.number + 1:
+        return False
+    return True
+
+
+def _get_cardstacks(search_board: board.Board) -> List[List[board.Card]]:
+    """Returns all cards on one stack that can be moved at once"""
+    result: List[List[board.Card]] = []
+    for stack in search_board.field:
+        result.append([])
+        if not stack:
+            continue
+        result[-1].append(stack[-1])
+        for card in stack[-2::-1]:
+            if not _can_stack(card, result[-1][0]):
+                break
+            if not isinstance(card, board.NumberCard):
+                break
+            result[-1].insert(0, card)
+    return result
 
 
 def possible_field_move_actions(
     search_board: board.Board
 ) -> Iterator[board_actions.MoveAction]:
     """Enumerate all possible move actions from one field stack to another field stack"""
-    for index, stack in enumerate(search_board.field):
+    for index, stack in enumerate(_get_cardstacks(search_board)):
         if not stack:
             continue
-        if not isinstance(stack[-1], board.NumberCard):
+        # TODO: sort all substacks by length
-            continue
+        for substack in (stack[i:] for i in range(len(stack))):
-        for other_index, other_stack in enumerate(search_board.field):
+            for other_index, other_stack in enumerate(search_board.field):
-            if other_stack:
+                if other_stack:
-                if not isinstance(other_stack[-1], board.NumberCard):
+                    if not _can_stack(other_stack[-1], substack[0]):
-                    continue
+                        continue
-                if other_stack[-1].suit == stack[-1].suit:
+                yield board_actions.MoveAction(
-                    continue
+                    cards=substack, source_id=index, destination_id=other_index
-                if other_stack[-1].number != stack[-1].number + 1:
+                )
-                    continue
-            yield board_actions.MoveAction(
-                cards=[stack[-1]], source_id=index, destination_id=other_index
-            )
 
 
 def possible_actions(search_board: board.Board) -> Iterator[board_actions.Action]:

main.py

@@ -39,8 +39,8 @@ def main() -> None:
     ]
 
     t.field[3] = [
-        SpecialCard.Zhong,
         SpecialCard.Bai,
+        SpecialCard.Zhong,
         NumberCard(NumberCard.Suit.Red, 3),
         NumberCard(NumberCard.Suit.Red, 7),
         NumberCard(NumberCard.Suit.Green, 6),
@@ -79,7 +79,19 @@ def main() -> None:
     ]
 
     print(t.check_correct())
-    print(*list(board_possibilities.possible_actions(t)), sep='\n')
+    step = list(board_possibilities.possible_actions(t))
+    print(*step, sep="\n")
+    sequence = [
+        0, 4, 0, 1, 0, 0, 8, 0, 1, 3, 0, 9, 0, 2, 0, 1, 1, 1, 2, 0, 2, 1, 6,
+        12, 0, 0, 1, 0, 0, 17, 11, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+    ]
+    for x in sequence:
+        print("Executing " + str(step[x]))
+        step[x].apply(t)
+        print(t.goal)
+        step = list(board_possibilities.possible_actions(t))
+        print(*enumerate(step), sep="\n")
+        print()
 
 
 if __name__ == "__main__":