Cheese strat

python_skeleton/player.py

@@ -30,8 +30,9 @@ def __init__(self):
         self.hole_eval = helper.create_hole_table()
         self.auction_win_probs = (0,0) # with auction, without auction
         self.won = False
+        self.opp_fold_cnt = (0, 1) # Opponent opportunites to fold
         self.cheese = False
-
+        
     def handle_new_round(self, game_state, round_state, active):
         '''
         Called when a new round starts. Called NUM_ROUNDS times.
@@ -71,6 +72,16 @@ def handle_round_over(self, game_state, terminal_state, active):
         street = previous_state.street  # 0, 3, 4, or 5 representing when this round ended
         my_cards = previous_state.hands[active]  # your cards
         opp_cards = previous_state.hands[1-active]  # opponent's cards or [] if not revealed
+
+        # if the game ended preflop and the opponent didn't contribute anything, we count as fold
+        # TODO: Check logic/math here
+        if (street == 0
+                and ((previous_state.pips[1 - active] == 2 and not bool(active))
+                or (previous_state.pips[1 - active] == 1 and bool(active)))):
+            if my_delta == 2:
+                self.opp_fold_cnt = (self.opp_fold_cnt[0] + 1, self.opp_fold_cnt[1] + 1)
+            elif STARTING_STACK - previous_state.stacks[1-active] > 2:
+                self.opp_fold_cnt = (self.opp_fold_cnt[0], self.opp_fold_cnt[1] + 1)
         pass
 
     def get_action(self, game_state, round_state, active):
@@ -102,10 +113,27 @@ def get_action(self, game_state, round_state, active):
         opp_contribution = STARTING_STACK - opp_stack  # the number of chips your opponent has contributed to the pot
         pot = my_contribution + opp_contribution
 
+        # Expected value from not playing
+        current_opp_fold_pct = self.opp_fold_cnt[0] / self.opp_fold_cnt[1]
+        passive_EV = (1.5 * (current_opp_fold_pct) - 3 * (1 - current_opp_fold_pct)) * (1000 - game_state.round_num)
+
+        print("Opp fold rate", current_opp_fold_pct)
+        print("Expected passive EV", passive_EV)
+
         if self.won:
             if FoldAction in legal_actions:
                 return FoldAction()
             return CheckAction()
+        # Cheese strategy:
+        # If the expected value for never playing round based on the fold percentage of the opponent in the last 250 rounds
+        # of the game lands you in the positive, then cheese and guarantee the win. Margin of error is 20 as it is reevaluated at
+        # each step in the game
+        elif (game_state.round_num >= 750
+                and passive_EV + game_state.bankroll > 20):
+            print("Started Cheesin")
+            if FoldAction in legal_actions:
+                return FoldAction()
+            return CheckAction()
 
         # Pre-flop
         if street == 0:
@@ -129,20 +157,21 @@ def get_action(self, game_state, round_state, active):
             self.cheese = False
 
             max_preflop_bet = int((my_stack + my_pip) * .2 * hole_strength)
+            min_raise, max_raise = round_state.raise_bounds()
 
             if (hole_strength == 0 and continue_cost > 0 and FoldAction in legal_actions):
                 if not bool(active):
                     if RaiseAction in legal_actions:
                         self.cheese = True
-                        return RaiseAction(5)
+                        return RaiseAction(min_raise)
                 elif continue_cost <=5:
                     self.cheese = True
                     return CallAction()
                 return FoldAction()
             elif (hole_strength * 0.7 > continue_cost / (continue_cost + pot)
                     and RaiseAction in legal_actions 
                     and my_contribution < max_preflop_bet): # TODO: tweak 0.85
-                min_raise, max_raise = round_state.raise_bounds()
+
 
                 if hole_pair:
                     bet = min(int((min_raise + ((max_raise - min_raise) * .1) ** hole_strength)), max_preflop_bet) * 3
@@ -164,7 +193,7 @@ def get_action(self, game_state, round_state, active):
                     if not bool(active):
                         if RaiseAction in legal_actions:
                             self.cheese = True
-                            return RaiseAction(5)
+                            return RaiseAction(min_raise)
                     elif continue_cost <=5:
                         self.cheese = True
                         return CallAction()