implement limit and fix evaluation

chesspp/engine.py

@@ -94,7 +94,7 @@ class BayesMctsEngine(Engine):
     def play(self, board: chess.Board, limit: Limit) -> chess.engine.PlayResult:
         if len(board.move_stack) != 0:  # apply previous move to mcts --> reuse previous simulation results
             self.mcts.apply_move(board.peek())
-        self.mcts.sample()
+        limit.run(lambda: self.mcts.sample(1))
         # limit.run(lambda: mcts_root.build_tree())
         best_move = max(self.mcts.get_moves().items(), key=lambda x: x[1])[0] if board.turn == chess.WHITE else (
             min(self.mcts.get_moves().items(), key=lambda x: x[1])[0])

chesspp/simulation.py

@@ -24,9 +24,6 @@ class EvaluationResult:
 def simulate_game(white: Engine, black: Engine, limit: Limit, board: chess.Board) -> chess.pgn.Game:
     is_white_playing = True
     while not board.is_game_over():
-        print("simulation board:\n", board)
-        print()
-        print("mcts board:\n", white.mcts.board)
         play_result = white.play(board, limit) if is_white_playing else black.play(board, limit)
         board.push(play_result.move)
         is_white_playing = not is_white_playing
@@ -38,26 +35,31 @@ def simulate_game(white: Engine, black: Engine, limit: Limit, board: chess.Board
 
 
 class Evaluation:
-    def __init__(self, engine_a: Engine.__class__, engine_b: Engine.__class__, limit: Limit):
+    def __init__(self, engine_a: Engine.__class__, strategy_a, engine_b: Engine.__class__, strategy_b, limit: Limit):
         self.engine_a = engine_a
+        self.strategy_a = strategy_a
         self.engine_b = engine_b
+        self.strategy_b = strategy_b
         self.limit = limit
 
     def run(self, n_games=100) -> List[EvaluationResult]:
         with mp.Pool(mp.cpu_count()) as pool:
-            args = [(self.engine_a, self.engine_b, self.limit) for i in range(n_games)]
+            args = [(self.engine_a, self.strategy_a, self.engine_b, self.strategy_b, self.limit) for i in range(n_games)]
             return pool.map(Evaluation._test_simulate, args)
 
     @staticmethod
     def _test_simulate(arg: Tuple[Engine.__class__, Engine.__class__, Limit]) -> EvaluationResult:
-        engine_a, engine_b, limit = arg
+        engine_a, strategy_a, engine_b, strategy_b, limit = arg
         flip_engines = bool(random.getrandbits(1))
-        if flip_engines:
-            black, white = engine_a(chess.BLACK), engine_b(chess.WHITE)
-        else:
-            white, black = engine_a(chess.WHITE), engine_b(chess.BLACK)
 
-        game = simulate_game(white, black, limit)
+        board = chess.Board()
+
+        if flip_engines:
+            black, white = engine_a(board.copy(), chess.BLACK, strategy_a), engine_b(board.copy(), chess.WHITE, strategy_b)
+        else:
+            white, black = engine_a(board.copy(), chess.WHITE, strategy_a), engine_b(board.copy(), chess.BLACK, strategy_b)
+
+        game = simulate_game(white, black, limit, board)
         winner = game.end().board().outcome().winner
 
         result = Winner.Draw

chesspp/stockfish_strategy.py

@@ -1,14 +1,25 @@
+import os
 import chess
 from chesspp.i_strategy import IStrategy
 import chess.engine
 
+_DIR = os.path.abspath(os.path.dirname(__file__))
 
 class StockFishStrategy(IStrategy):
-    stockfish: chess.engine.SimpleEngine
 
     def __init__(self):
-        self.stockfish = chess.engine.SimpleEngine.popen_uci(
-            "/home/luke/projects/pp-project/chess-engine-pp/stockfish/stockfish-ubuntu-x86-64-avx2")
+        self._stockfish = None
+
+    @property
+    def stockfish(self) -> chess.engine.SimpleEngine:
+        if self._stockfish is None:
+            self._stockfish = self.stockfish = chess.engine.SimpleEngine.popen_uci(
+                os.path.join(_DIR, "../stockfish/stockfish-ubuntu-x86-64-avx2"))
+        return self._stockfish
+
+    @stockfish.setter
+    def stockfish(self, stockfish):
+        self._stockfish = stockfish
 
     def pick_next_move(self, board: chess.Board) -> chess.Move | None:
         move = self.stockfish.play(board, chess.engine.Limit(depth=4)).move

chesspp/web.py

@@ -75,8 +75,8 @@ class WebInterface:
 
         async def turns():
             """ Simulates the game and sends the response to the client """
-            runner = Simulate(self.white(chess.Board(), chess.WHITE, RandomStrategy(random.Random())), self.black(
-                chess.Board(), chess.BLACK, RandomStrategy(random.Random()))).run(limit)
+            runner = Simulate(self.white(chess.Board(), chess.WHITE, StockFishStrategy()), self.black(
+                chess.Board(), chess.BLACK, StockFishStrategy())).run(self.limit)
             def sim():
                 return next(runner, None)
 
@@ -103,6 +103,6 @@ class WebInterface:
         ])
         web.run_app(app)
 
-if __name__ == '__main__':
+def run_sample():
     limit = engine.Limit(time=0.5)
     WebInterface(engine.BayesMctsEngine, engine.ClassicMctsEngine, limit).run_app()