From f3858a73fa79eafc773eb2e6c4b579134e5c0720 Mon Sep 17 00:00:00 2001
From: Apricot-S <mahjong_apricot@outlook.jp>
Date: Mon, 11 May 2026 00:15:03 +0900
Subject: [PATCH] fix: Create a new `HandConfig` instance when `config=None` in
 `HandCalculator.estimate_hand_value`

---
 mahjong/hand_calculating/hand.py | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/mahjong/hand_calculating/hand.py b/mahjong/hand_calculating/hand.py
index e7a9166..e5582b4 100644
--- a/mahjong/hand_calculating/hand.py
+++ b/mahjong/hand_calculating/hand.py
@@ -25,8 +25,6 @@ class _CalculatedHand(TypedDict):
 # suit bitmask: sou=1, pin=2, man=4
 _ALL_SUITS_MASK = 7
 
-_DEFAULT_CONFIG = HandConfig()
-
 
 class HandCalculator:
     """
@@ -190,7 +188,7 @@ def estimate_hand_value(
         if not ura_dora_indicators:
             ura_dora_indicators = []
 
-        config = config or _DEFAULT_CONFIG
+        config = config or HandConfig()
 
         hand_yaku = []
         scores_calculator = scores_calculator_factory()