diff --git a/cutechess.py b/cutechess.py
index b048c44..cb98af8 100644
--- a/cutechess.py
+++ b/cutechess.py
@@ -12,53 +12,69 @@ class MatchResult:
 
 class CutechessMan:
 
-    def __init__(self, engine: str, book: str, games: int = 120, tc: float = 5.0, hash_size: int = 8, threads: int = 1):
+    def __init__(
+        self,
+        engine: str,
+        book: str,
+        games: int = 120,
+        tc: float = 5.0,
+        hash: int = 8,
+        threads: int = 1
+    ):
         self.engine = engine
         self.book = book
         self.games = games
         self.tc = tc
         self.inc = tc / 100
-        self.hash_size = hash_size
+        self.hash_size = hash
         self.threads = threads
 
-    def get_cutechess_cmd(self, params_a: list[str], params_b: list[str]) -> str:
-        return f"./tuner/cutechess-cli \
-                -engine cmd=./tuner/{self.engine} name={self.engine} proto=uci option.Hash={self.hash_size} {' '.join(params_a)} \
-                -engine cmd=./tuner/{self.engine} name={self.engine} proto=uci option.Hash={self.hash_size} {' '.join(params_b)} \
-                -resign movecount=3 score=400 \
-                -draw movenumber=40 movecount=8 score=10 \
-                -repeat \
-                -recover \
-                -concurrency {self.threads} \
-                -each tc={self.tc}+{self.inc} \
-                -openings file=tuner/{self.book} format={self.book.split('.')[-1]} order=random plies=16 \
-                -games {self.games} \
-                -pgnout tuner/games.pgn"
+    def get_cutechess_cmd(
+        self,
+        params_a: list[str],
+        params_b: list[str]
+    ) -> str:
+        return (
+            "./tuner/cutechess-cli "
+            f"-engine cmd=./tuner/{self.engine} name={self.engine} proto=uci "
+            f"option.Hash={self.hash_size} {' '.join(params_a)} "
+            f"-engine cmd=./tuner/{self.engine} name={self.engine} proto=uci "
+            f"option.Hash={self.hash_size} {' '.join(params_b)} "
+            "-resign movecount=3 score=400 "
+            "-draw movenumber=40 movecount=8 score=10 "
+            "-repeat "
+            "-recover "
+            f"-concurrency {self.threads} "
+            f"-each tc={self.tc}+{self.inc} "
+            f"-openings file=tuner/{self.book} "
+            f"format={self.book.split('.')[-1]} order=random plies=16 "
+            f"-games {self.games} "
+            "-pgnout tuner/games.pgn"
+        )
 
     def run(self, params_a: list[str], params_b: list[str]) -> MatchResult:
         cmd = self.get_cutechess_cmd(params_a, params_b)
         cutechess = Popen(cmd.split(), stdout=PIPE)
 
         score = [0, 0, 0]
-        elo_diff = 0
+        elo_diff = 0.0
 
         while True:
 
             # Read each line of output until the pipe closes
             line = cutechess.stdout.readline().strip().decode('ascii')
-            if line != '':
+            if line:
                 print(line)
             else:
                 cutechess.wait()
-                return MatchResult(score[0], score[1], score[2], elo_diff)
+                return MatchResult(*score, elo_diff)
             # Parse WLD score
             if line.startswith("Score of"):
                 start_index = line.find(":") + 1
                 end_index = line.find("[")
                 split = line[start_index:end_index].split(" - ")
 
-                for i in range(3):
-                    score[i] = int(split[i])
+                score = [int(i) for i in split]
 
             # Parse Elo Difference
             if line.startswith("Elo difference"):
diff --git a/graph.py b/graph.py
index eea4c0b..460232f 100644
--- a/graph.py
+++ b/graph.py
@@ -1,23 +1,21 @@
-import copy
 from spsa import Param
-from matplotlib import pyplot as plt
+import matplotlib.pyplot as plt
 
 
 class Graph:
     def __init__(self):
-        self.history = []
+        self.history: list[list[Param]] = []
 
     def update(self, params: list[Param]):
         self.history.append(params)
 
     def save(self, file_name: str):
-        iters = list(range(len(self.history)))
-        param_values = {}
+        param_values: dict[str, list[float]] = {}
         for params in self.history:
             for param in params:
                 if param.name not in param_values:
                     param_values[param.name] = []
                 param_values[param.name].append(param.value)
-        for param in param_values:
-            plt.plot(iters, param_values[param], label=param)
+        for name, value in param_values.items():
+            plt.plot(range(len(self.history)), value, label=name)
         plt.savefig(f"tuner/{file_name}")
diff --git a/main.py b/main.py
index bb0404c..872d127 100644
--- a/main.py
+++ b/main.py
@@ -6,37 +6,22 @@
 import copy
 
 
-def cutechess_from_config(config: str) -> CutechessMan:
-    with open(config, "r") as config:
-        config = json.load(config)
-        return CutechessMan(config["engine"],
-                            config["book"],
-                            config["games"],
-                            config["tc"],
-                            config["hash"],
-                            config["threads"])
-
-
-def params_from_config(config: str):
-    with open(config, "r") as config:
-        params = []
-        config = json.load(config)
-        for name in config:
-            param = config[name]
-            params.append(Param(
-                name,
-                param["value"],
-                param["min_value"],
-                param["max_value"],
-                param["elo_per_val"]
-            ))
-        return params
-
-
-def spsa_from_config(config: str):
-    with open(config, "r") as config:
-        config = json.load(config)
-        return SpsaParams(config["a"], config["c"], config["A"], config["alpha"], config["gamma"], config["elo"])
+def cutechess_from_config(config_path: str) -> CutechessMan:
+    with open(config_path) as config_file:
+        config = json.load(config_file)
+    return CutechessMan(**config)
+
+
+def params_from_config(config_path: str) -> list[Param]:
+    with open(config_path) as config_file:
+        config = json.load(config_file)
+    return [Param(name, **cfg) for name, cfg in config.items()]
+
+
+def spsa_from_config(config_path: str):
+    with open(config_path) as config_file:
+        config = json.load(config_file)
+    return SpsaParams(**config)
 
 
 def main():
@@ -48,10 +33,10 @@ def main():
 
     while True:
         spsa.step()
-        graph.update(copy.deepcopy(spsa.params()))
+        graph.update(copy.deepcopy(spsa.params))
         graph.save("graph.png")
-        for param in spsa.params():
-            print(param.pretty())
+        for param in spsa.params:
+            print(param)
 
 
 if __name__ == "__main__":
diff --git a/requirements.txt b/requirements.txt
index 4b43f7e..1573235 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1 @@
-matplotlib
\ No newline at end of file
+matplotlib==3.5.1
\ No newline at end of file
diff --git a/spsa.json b/spsa.json
index 17ecbb2..346e621 100644
--- a/spsa.json
+++ b/spsa.json
@@ -4,5 +4,5 @@
     "A": 100,
     "alpha": 0.6,
     "gamma": 0.1,
-    "elo": 2
+    "target_elo": 2
 }
\ No newline at end of file
diff --git a/spsa.py b/spsa.py
index 178e5ec..b36cf6d 100644
--- a/spsa.py
+++ b/spsa.py
@@ -1,33 +1,36 @@
-
-
+from cutechess import CutechessMan
 from dataclasses import dataclass
-import random
+from random import randint
 import copy
 
-from cutechess import CutechessMan, MatchResult
-
 
+@dataclass
 class Param:
-    def __init__(self, name: str, value: int, min_value: int, max_value: int, elo_per_val: float):
-        assert elo_per_val > 0
-        self.name = name
-        self.value = value
-        self.min_value = min_value
-        self.max_value = max_value
-        self.elo_per_val = elo_per_val
+    name: str
+    value: float
+    min_value: int
+    max_value: int
+    elo_per_val: float
+
+    def __post_init__(self):
+        assert self.elo_per_val > 0
 
     def get(self) -> int:
         return round(self.value)
 
     def update(self, amt: float):
-        self.value += amt
-        self.value = min(max(self.value, self.min_value), self.max_value)
+        self.value = min(max(self.value + amt, self.min_value), self.max_value)
 
+    @property
     def as_uci(self) -> str:
         return f"option.{self.name}={self.get()}"
 
-    def pretty(self) -> str:
-        return f"{self.name} = {self.get()} in [{self.min_value}, {self.max_value}] with Elo diff {self.elo_per_val}"
+    def __str__(self) -> str:
+        return (
+            f"{self.name} = {self.get()} in "
+            f"[{self.min_value}, {self.max_value}] "
+            f"with Elo diff {self.elo_per_val}"
+        )
 
 
 @dataclass
@@ -42,7 +45,12 @@ class SpsaParams:
 
 class SpsaTuner:
 
-    def __init__(self, spsa_params: SpsaParams, uci_params: list[Param], cutechess: CutechessMan):
+    def __init__(
+        self,
+        spsa_params: SpsaParams,
+        uci_params: list[Param],
+        cutechess: CutechessMan
+    ):
         self.uci_params = uci_params
         self.spsa = spsa_params
         self.cutechess = cutechess
@@ -50,16 +58,15 @@ def __init__(self, spsa_params: SpsaParams, uci_params: list[Param], cutechess:
         self.t = 0
 
     def step(self):
-        a_t = self.spsa.a / (self.t + 1 + self.spsa.A) ** self.spsa.alpha
-        c_t = self.spsa.c / (self.t + 1) ** self.spsa.gamma
         self.t += 1
+        a_t = self.spsa.a / (self.t + self.spsa.A) ** self.spsa.alpha
+        c_t = self.spsa.c / self.t ** self.spsa.gamma
 
-        for i in range(len(self.delta)):
-            self.delta[i] = random.randint(0, 1) * 2 - 1
+        self.delta = [randint(0, 1) * 2 - 1 for _ in range(len(self.delta))]
 
         uci_params_a = []
         uci_params_b = []
-        for (param, delta) in zip(self.uci_params, self.delta):
+        for param, delta in zip(self.uci_params, self.delta):
             curr_delta = self.spsa.target_elo / param.elo_per_val
 
             step = delta * curr_delta * c_t
@@ -75,15 +82,16 @@ def step(self):
 
         gradient = self.gradient(uci_params_a, uci_params_b)
 
-        for (param, delta) in zip(self.uci_params, self.delta):
+        for param, delta in zip(self.uci_params, self.delta):
             param_grad = gradient / (delta * c_t)
             param.update(-param_grad * a_t)
 
+    @property
     def params(self) -> list[Param]:
         return self.uci_params
 
     def gradient(self, params_a: list[Param], params_b: list[Param]) -> float:
-        params_a = [p.as_uci() for p in params_a]
-        params_b = [p.as_uci() for p in params_b]
-        game_result: MatchResult = self.cutechess.run(params_a, params_b)
+        str_params_a = [p.as_uci for p in params_a]
+        str_params_b = [p.as_uci for p in params_b]
+        game_result = self.cutechess.run(str_params_a, str_params_b)
         return -game_result.elo_diff