diff --git a/main.py b/main.py
new file mode 100644
index 0000000..95073f7
--- /dev/null
+++ b/main.py
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+"""Main module"""
+from typing import List, Union, Tuple, Iterator, Optional
+import enum
+from dataclasses import dataclass
+
+
+class SpecialCard(enum.Enum):
+    """Different types of special cards"""
+    Zhong = enum.auto()
+    Bai = enum.auto()
+    Fa = enum.auto()
+    Hua = enum.auto()
+
+
+@dataclass(frozen=True)
+class NumberCard:
+    """Different number cards"""
+    class Suit(enum.Enum):
+        """Different colors number cards can have"""
+        Red = enum.auto()
+        Green = enum.auto()
+        Black = enum.auto()
+    suit: Suit
+    number: int
+
+
+Card = Union[NumberCard, SpecialCard]
+
+
+class Position(enum.Enum):
+    """Possible Board positions"""
+    Field = enum.auto()
+    Bunker = enum.auto()
+    Goal = enum.auto()
+
+
+@dataclass
+class MoveAction:
+    """Moving a card from one stack to another"""
+    card: Card
+    source_position: Position
+    source_id: int
+    destination_position: Position
+    destination_id: int
+
+
+@dataclass
+class DragonKillAction:
+    """Removing four dragons from the top of the stacks to a bunker"""
+    dragon: SpecialCard
+    source_stacks: List[Tuple[Position, int]]
+    destination_bunker_id: int
+
+
+@dataclass
+class HuaKillAction:
+    """Remove the flower card"""
+    source_field_id: int
+
+
+Action = Union[MoveAction, DragonKillAction, HuaKillAction]
+
+
+class BunkerStatus(enum.Enum):
+    """States a bunker can be in, if it not holding a card"""
+    Empty = enum.auto()
+    Dragon = enum.auto()
+
+
+@dataclass
+class Board:
+    """Solitaire board"""
+    field: List[List[Card]] = []
+    bunker: Tuple[Union[BunkerStatus, Card],
+                  Union[BunkerStatus, Card],
+                  Union[BunkerStatus, Card]] = (BunkerStatus.Empty,
+                                                BunkerStatus.Empty, BunkerStatus.Empty,)
+    goal: List[Tuple[NumberCard.Suit, int]] = []
+    flowerGone: bool = False
+
+    def possible_huakill_action(self) -> Iterator[HuaKillAction]:
+        """Check if the flowercard can be eliminated"""
+        for index, stack in enumerate(self.field):
+            if stack[-1] == SpecialCard.Hua:
+                yield HuaKillAction(source_field_id=index)
+
+    def possible_dragonkill_actions(self) -> Iterator[DragonKillAction]:
+        """Enumerate all possible dragon kills"""
+        possible_dragons = [SpecialCard.Zhong, SpecialCard.Fa, SpecialCard.Bai]
+        if not any(x == BunkerStatus.Empty for x in self.bunker):
+            new_possible_dragons = []
+            for dragon in possible_dragons:
+                if any(x == dragon for x in self.bunker):
+                    new_possible_dragons.append(dragon)
+            possible_dragons = new_possible_dragons
+
+        for dragon in possible_dragons:
+            bunker_dragons = [i for i, d in enumerate(
+                self.bunker) if d == dragon]
+            field_dragons = [i for i, f in enumerate(
+                self.field) if f if f[-1] == dragon]
+            if len(bunker_dragons) + len(field_dragons) != 4:
+                continue
+            destination_bunker_id = 0
+            if bunker_dragons:
+                destination_bunker_id = bunker_dragons[0]
+            else:
+                destination_bunker_id = [
+                    i for i, x in enumerate(self.bunker) if x == BunkerStatus.Empty][0]
+
+            source_stacks = [(Position.Bunker, i) for i in bunker_dragons]
+            source_stacks.extend([(Position.Field, i) for i in field_dragons])
+
+            yield DragonKillAction(dragon=dragon, source_stacks=source_stacks,
+                                   destination_bunker_id=destination_bunker_id)
+
+    def possible_move_actions(self) -> Iterator[MoveAction]:
+        """Enumerate all possible move actions"""
+        for index, stack in enumerate(self.field):
+            if not stack:
+                continue
+            if not isinstance(stack[-1], NumberCard):
+                continue
+            for other_index, other_stack in enumerate(self.field):
+                if not stack:
+                    continue
+                if not isinstance(other_stack[-1], NumberCard):
+                    continue
+                if other_stack[-1].suit == stack[-1].suit:
+                    continue
+                if other_stack[-1].number != stack[-1].number + 1:
+                    continue
+                yield MoveAction(card=stack[-1],
+                                 source_position=Position.Field,
+                                 source_id=index,
+                                 destination_position=Position.Field,
+                                 destination_id=other_index)
+
+
+        open_bunker_list = [i for i, x in enumerate(self.bunker) if x == BunkerStatus.Empty]
+        if not open_bunker_list:
+            return
+        open_bunker = open_bunker_list[0]
+
+
+    def possible_actions(self) -> Iterator[Action]:
+        """Enumerate all possible actions on the current board"""
+        yield from self.possible_huakill_action()
+        yield from self.possible_dragonkill_actions()
+        yield from self.possible_move_actions()
+
+
+class SolitaireSolver:
+    """Solver for Shenzhen Solitaire"""
+    board: Board
+    stack: List[Tuple[Action, int]]