From fd3833b7441ffc17c46a368b017e7d621e84e81f Mon Sep 17 00:00:00 2001
From: Your Name <your-email@example.com>
Date: Thu, 19 Feb 2026 11:24:27 -0800
Subject: [PATCH] fix: allow uppercase letters in Chess.com username regex

Fixes #2799

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---
 sherlock_project/resources/data.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sherlock_project/resources/data.json b/sherlock_project/resources/data.json
index 72b15e68..4585770b 100644
--- a/sherlock_project/resources/data.json
+++ b/sherlock_project/resources/data.json
@@ -447,7 +447,7 @@
   "Chess": {
     "errorMsg": "Username is valid",
     "errorType": "message",
-    "regexCheck": "^[a-z1-9]{3,25}$",
+    "regexCheck": "^[a-zA-Z0-9_]{3,25}$",
     "url": "https://www.chess.com/member/{}",
     "urlMain": "https://www.chess.com/",
     "urlProbe": "https://www.chess.com/callback/user/valid?username={}",