diff --git a/main.py b/main.py
new file mode 100644
index 0000000..9113f79
--- /dev/null
+++ b/main.py
@@ -0,0 +1,437 @@
+import sys
+import random
+import pygame
+from pygame.locals import *
+import pygame.gfxdraw
+from collections import namedtuple
+
+Chessman = namedtuple('Chessman', 'Name Value Color')
+Point = namedtuple('Point', 'X Y')
+
+BLACK_CHESSMAN = Chessman('黑子', 1, (45, 45, 45))
+WHITE_CHESSMAN = Chessman('白子', 2, (219, 219, 219))
+
+offset = [(1, 0), (0, 1), (1, 1), (1, -1)]
+
+
+class Checkerboard:
+  def __init__(self, line_points):
+      self._line_points = line_points
+      self._checkerboard = [[0] * line_points for _ in range(line_points)]
+
+  def _get_checkerboard(self):
+      return self._checkerboard
+
+  checkerboard = property(_get_checkerboard)
+
+  # 判断是否可落子
+  def can_drop(self, point):
+      return self._checkerboard[point.Y][point.X] == 0
+
+  def drop(self, chessman, point):
+      """
+      落子
+      :param chessman:
+      :param point:落子位置
+      :return:若该子落下之后即可获胜，则返回获胜方，否则返回 None
+      """
+      print(f'{chessman.Name} ({point.X}, {point.Y})')
+      self._checkerboard[point.Y][point.X] = chessman.Value
+
+      if self._win(point):
+          print(f'{chessman.Name}获胜')
+          return chessman
+
+  # 判断是否赢了
+  def _win(self, point):
+      cur_value = self._checkerboard[point.Y][point.X]
+      for os in offset:
+          if self._get_count_on_direction(point, cur_value, os[0], os[1]):
+              return True
+
+  def _get_count_on_direction(self, point, value, x_offset, y_offset):
+      count = 1
+      for step in range(1, 5):
+          x = point.X + step * x_offset
+          y = point.Y + step * y_offset
+          if 0 <= x < self._line_points and 0 <= y < self._line_points and self._checkerboard[y][x] == value:
+              count += 1
+          else:
+              break
+      for step in range(1, 5):
+          x = point.X - step * x_offset
+          y = point.Y - step * y_offset
+          if 0 <= x < self._line_points and 0 <= y < self._line_points and self._checkerboard[y][x] == value:
+              count += 1
+          else:
+              break
+
+      return count >= 5
+
+
+SIZE = 30  # 棋盘每个点时间的间隔
+Line_Points = 19  # 棋盘每行/每列点数
+Outer_Width = 20  # 棋盘外宽度
+Border_Width = 4  # 边框宽度
+Inside_Width = 4  # 边框跟实际的棋盘之间的间隔
+Border_Length = SIZE * (Line_Points - 1) + Inside_Width * 2 + Border_Width  # 边框线的长度
+Start_X = Start_Y = Outer_Width + int(Border_Width / 2) + Inside_Width  # 网格线起点（左上角）坐标
+SCREEN_HEIGHT = SIZE * (Line_Points - 1) + Outer_Width * 2 + Border_Width + Inside_Width * 2  # 游戏屏幕的高
+SCREEN_WIDTH = SCREEN_HEIGHT + 200  # 游戏屏幕的宽
+
+Stone_Radius = SIZE // 2 - 3  # 棋子半径
+Stone_Radius2 = SIZE // 2 + 3
+Checkerboard_Color = (0xE3, 0x92, 0x65)  # 棋盘颜色
+BLACK_COLOR = (0, 0, 0)
+WHITE_COLOR = (255, 255, 255)
+RED_COLOR = (200, 30, 30)
+BLUE_COLOR = (30, 30, 200)
+
+RIGHT_INFO_POS_X = SCREEN_HEIGHT + Stone_Radius2 * 2 + 10
+
+
+def print_text(screen, font, x, y, text, fcolor=(255, 255, 255)):
+  imgText = font.render(text, True, fcolor)
+  screen.blit(imgText, (x, y))
+
+
+def main():
+  pygame.init()
+  screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
+  pygame.display.set_caption('五子棋')
+
+  font1 = pygame.font.SysFont('SimHei', 32)
+  font2 = pygame.font.SysFont('SimHei', 72)
+  fwidth, fheight = font2.size('黑方获胜')
+
+  checkerboard = Checkerboard(Line_Points)
+  cur_runner = BLACK_CHESSMAN
+  winner = None
+  computer = AI(Line_Points, WHITE_CHESSMAN)
+
+  black_win_count = 0
+  white_win_count = 0
+
+  while True:
+      for event in pygame.event.get():
+          if event.type == QUIT:
+              sys.exit()
+          elif event.type == KEYDOWN:
+              if event.key == K_RETURN:
+                  if winner is not None:
+                      winner = None
+                      cur_runner = BLACK_CHESSMAN
+                      checkerboard = Checkerboard(Line_Points)
+                      computer = AI(Line_Points, WHITE_CHESSMAN)
+          elif event.type == MOUSEBUTTONDOWN:
+              if winner is None:
+                  pressed_array = pygame.mouse.get_pressed()
+                  if pressed_array[0]:
+                      mouse_pos = pygame.mouse.get_pos()
+                      click_point = _get_clickpoint(mouse_pos)
+                      if click_point is not None:
+                          if checkerboard.can_drop(click_point):
+                              winner = checkerboard.drop(cur_runner, click_point)
+                              if winner is None:
+                                  cur_runner = _get_next(cur_runner)
+                                  computer.get_opponent_drop(click_point)
+                                  AI_point = computer.AI_drop()
+                                  winner = checkerboard.drop(cur_runner, AI_point)
+                                  if winner is not None:
+                                      white_win_count += 1
+                                  cur_runner = _get_next(cur_runner)
+                              else:
+                                  black_win_count += 1
+                      else:
+                          print('超出棋盘区域')
+
+      # 画棋盘
+      _draw_checkerboard(screen)
+
+      # 画棋盘上已有的棋子
+      for i, row in enumerate(checkerboard.checkerboard):
+          for j, cell in enumerate(row):
+              if cell == BLACK_CHESSMAN.Value:
+                  _draw_chessman(screen, Point(j, i), BLACK_CHESSMAN.Color)
+              elif cell == WHITE_CHESSMAN.Value:
+                  _draw_chessman(screen, Point(j, i), WHITE_CHESSMAN.Color)
+
+      _draw_left_info(screen, font1, cur_runner, black_win_count, white_win_count)
+
+      if winner:
+          print_text(screen, font2, (SCREEN_WIDTH - fwidth)//2, (SCREEN_HEIGHT - fheight)//2, winner.Name + '获胜', RED_COLOR)
+
+      pygame.display.flip()
+
+
+def _get_next(cur_runner):
+  if cur_runner == BLACK_CHESSMAN:
+      return WHITE_CHESSMAN
+  else:
+      return BLACK_CHESSMAN
+
+
+# 画棋盘
+def _draw_checkerboard(screen):
+  # 填充棋盘背景色
+  screen.fill(Checkerboard_Color)
+  # 画棋盘网格线外的边框
+  pygame.draw.rect(screen, BLACK_COLOR, (Outer_Width, Outer_Width, Border_Length, Border_Length), Border_Width)
+  # 画网格线
+  for i in range(Line_Points):
+      pygame.draw.line(screen, BLACK_COLOR,
+                       (Start_Y, Start_Y + SIZE * i),
+                       (Start_Y + SIZE * (Line_Points - 1), Start_Y + SIZE * i),
+                       1)
+  for j in range(Line_Points):
+      pygame.draw.line(screen, BLACK_COLOR,
+                       (Start_X + SIZE * j, Start_X),
+                       (Start_X + SIZE * j, Start_X + SIZE * (Line_Points - 1)),
+                       1)
+  # 画星位和天元
+  for i in (3, 9, 15):
+      for j in (3, 9, 15):
+          if i == j == 9:
+              radius = 5
+          else:
+              radius = 3
+          # pygame.draw.circle(screen, BLACK, (Start_X + SIZE * i, Start_Y + SIZE * j), radius)
+          pygame.gfxdraw.aacircle(screen, Start_X + SIZE * i, Start_Y + SIZE * j, radius, BLACK_COLOR)
+          pygame.gfxdraw.filled_circle(screen, Start_X + SIZE * i, Start_Y + SIZE * j, radius, BLACK_COLOR)
+
+
+# 画棋子
+def _draw_chessman(screen, point, stone_color):
+  # pygame.draw.circle(screen, stone_color, (Start_X + SIZE * point.X, Start_Y + SIZE * point.Y), Stone_Radius)
+  pygame.gfxdraw.aacircle(screen, Start_X + SIZE * point.X, Start_Y + SIZE * point.Y, Stone_Radius, stone_color)
+  pygame.gfxdraw.filled_circle(screen, Start_X + SIZE * point.X, Start_Y + SIZE * point.Y, Stone_Radius, stone_color)
+
+
+# 画左侧信息显示
+def _draw_left_info(screen, font, cur_runner, black_win_count, white_win_count):
+  _draw_chessman_pos(screen, (SCREEN_HEIGHT + Stone_Radius2, Start_X + Stone_Radius2), BLACK_CHESSMAN.Color)
+  _draw_chessman_pos(screen, (SCREEN_HEIGHT + Stone_Radius2, Start_X + Stone_Radius2 * 4), WHITE_CHESSMAN.Color)
+
+  print_text(screen, font, RIGHT_INFO_POS_X, Start_X + 3, '玩家', BLUE_COLOR)
+  print_text(screen, font, RIGHT_INFO_POS_X, Start_X + Stone_Radius2 * 3 + 3, '电脑', BLUE_COLOR)
+
+  print_text(screen, font, SCREEN_HEIGHT, SCREEN_HEIGHT - Stone_Radius2 * 8, '战况：', BLUE_COLOR)
+  _draw_chessman_pos(screen, (SCREEN_HEIGHT + Stone_Radius2, SCREEN_HEIGHT - int(Stone_Radius2 * 4.5)), BLACK_CHESSMAN.Color)
+  _draw_chessman_pos(screen, (SCREEN_HEIGHT + Stone_Radius2, SCREEN_HEIGHT - Stone_Radius2 * 2), WHITE_CHESSMAN.Color)
+  print_text(screen, font, RIGHT_INFO_POS_X, SCREEN_HEIGHT - int(Stone_Radius2 * 5.5) + 3, f'{black_win_count} 胜', BLUE_COLOR)
+  print_text(screen, font, RIGHT_INFO_POS_X, SCREEN_HEIGHT - Stone_Radius2 * 3 + 3, f'{white_win_count} 胜', BLUE_COLOR)
+
+
+def _draw_chessman_pos(screen, pos, stone_color):
+  pygame.gfxdraw.aacircle(screen, pos[0], pos[1], Stone_Radius2, stone_color)
+  pygame.gfxdraw.filled_circle(screen, pos[0], pos[1], Stone_Radius2, stone_color)
+
+
+# 根据鼠标点击位置，返回游戏区坐标
+def _get_clickpoint(click_pos):
+  pos_x = click_pos[0] - Start_X
+  pos_y = click_pos[1] - Start_Y
+  if pos_x < -Inside_Width or pos_y < -Inside_Width:
+      return None
+  x = pos_x // SIZE
+  y = pos_y // SIZE
+  if pos_x % SIZE > Stone_Radius:
+      x += 1
+  if pos_y % SIZE > Stone_Radius:
+      y += 1
+  if x >= Line_Points or y >= Line_Points:
+      return None
+
+  return Point(x, y)
+
+
+class AI:
+  def __init__(self, line_points, chessman):
+      self._line_points = line_points
+      self._my = chessman
+      self._opponent = BLACK_CHESSMAN if chessman == WHITE_CHESSMAN else WHITE_CHESSMAN
+      self._checkerboard = [[0] * line_points for _ in range(line_points)]
+
+  def get_opponent_drop(self, point):
+      self._checkerboard[point.Y][point.X] = self._opponent.Value
+
+  def AI_drop(self):
+      point = None
+      score = 0
+      for i in range(self._line_points):
+          for j in range(self._line_points):
+              if self._checkerboard[j][i] == 0:
+                  _score = self._get_point_score(Point(i, j))
+                  if _score > score:
+                      score = _score
+                      point = Point(i, j)
+                  elif _score == score and _score > 0:
+                      r = random.randint(0, 100)
+                      if r % 2 == 0:
+                          point = Point(i, j)
+      self._checkerboard[point.Y][point.X] = self._my.Value
+      return point
+
+  def _get_point_score(self, point):
+      score = 0
+      for os in offset:
+          score += self._get_direction_score(point, os[0], os[1])
+      return score
+
+  def _get_direction_score(self, point, x_offset, y_offset):
+      count = 0   # 落子处我方连续子数
+      _count = 0  # 落子处对方连续子数
+      space = None   # 我方连续子中有无空格
+      _space = None  # 对方连续子中有无空格
+      both = 0    # 我方连续子两端有无阻挡
+      _both = 0   # 对方连续子两端有无阻挡
+
+      # 如果是 1 表示是边上是我方子，2 表示敌方子
+      flag = self._get_stone_color(point, x_offset, y_offset, True)
+      if flag != 0:
+          for step in range(1, 6):
+              x = point.X + step * x_offset
+              y = point.Y + step * y_offset
+              if 0 <= x < self._line_points and 0 <= y < self._line_points:
+                  if flag == 1:
+                      if self._checkerboard[y][x] == self._my.Value:
+                          count += 1
+                          if space is False:
+                              space = True
+                      elif self._checkerboard[y][x] == self._opponent.Value:
+                          _both += 1
+                          break
+                      else:
+                          if space is None:
+                              space = False
+                          else:
+                              break   # 遇到第二个空格退出
+                  elif flag == 2:
+                      if self._checkerboard[y][x] == self._my.Value:
+                          _both += 1
+                          break
+                      elif self._checkerboard[y][x] == self._opponent.Value:
+                          _count += 1
+                          if _space is False:
+                              _space = True
+                      else:
+                          if _space is None:
+                              _space = False
+                          else:
+                              break
+              else:
+                  # 遇到边也就是阻挡
+                  if flag == 1:
+                      both += 1
+                  elif flag == 2:
+                      _both += 1
+
+      if space is False:
+          space = None
+      if _space is False:
+          _space = None
+
+      _flag = self._get_stone_color(point, -x_offset, -y_offset, True)
+      if _flag != 0:
+          for step in range(1, 6):
+              x = point.X - step * x_offset
+              y = point.Y - step * y_offset
+              if 0 <= x < self._line_points and 0 <= y < self._line_points:
+                  if _flag == 1:
+                      if self._checkerboard[y][x] == self._my.Value:
+                          count += 1
+                          if space is False:
+                              space = True
+                      elif self._checkerboard[y][x] == self._opponent.Value:
+                          _both += 1
+                          break
+                      else:
+                          if space is None:
+                              space = False
+                          else:
+                              break   # 遇到第二个空格退出
+                  elif _flag == 2:
+                      if self._checkerboard[y][x] == self._my.Value:
+                          _both += 1
+                          break
+                      elif self._checkerboard[y][x] == self._opponent.Value:
+                          _count += 1
+                          if _space is False:
+                              _space = True
+                      else:
+                          if _space is None:
+                              _space = False
+                          else:
+                              break
+              else:
+                  # 遇到边也就是阻挡
+                  if _flag == 1:
+                      both += 1
+                  elif _flag == 2:
+                      _both += 1
+
+      score = 0
+      if count == 4:
+          score = 10000
+      elif _count == 4:
+          score = 9000
+      elif count == 3:
+          if both == 0:
+              score = 1000
+          elif both == 1:
+              score = 100
+          else:
+              score = 0
+      elif _count == 3:
+          if _both == 0:
+              score = 900
+          elif _both == 1:
+              score = 90
+          else:
+              score = 0
+      elif count == 2:
+          if both == 0:
+              score = 100
+          elif both == 1:
+              score = 10
+          else:
+              score = 0
+      elif _count == 2:
+          if _both == 0:
+              score = 90
+          elif _both == 1:
+              score = 9
+          else:
+              score = 0
+      elif count == 1:
+          score = 10
+      elif _count == 1:
+          score = 9
+      else:
+          score = 0
+
+      if space or _space:
+          score /= 2
+
+      return score
+
+  # 判断指定位置处在指定方向上是我方子、对方子、空
+  def _get_stone_color(self, point, x_offset, y_offset, next):
+      x = point.X + x_offset
+      y = point.Y + y_offset
+      if 0 <= x < self._line_points and 0 <= y < self._line_points:
+          if self._checkerboard[y][x] == self._my.Value:
+              return 1
+          elif self._checkerboard[y][x] == self._opponent.Value:
+              return 2
+          else:
+              if next:
+                  return self._get_stone_color(Point(x, y), x_offset, y_offset, False)
+              else:
+                  return 0
+      else:
+          return 0
+
+
+if __name__ == '__main__':
+  main()
\ No newline at end of file