Update app.py

just a copy from another one.

app.py

@@ -7,6 +7,32 @@ from tools.final_answer import FinalAnswerTool
 
 from Gradio_UI import GradioUI
 
+@tool
+def get_best_move_lichess(fen: str) -> str:
+    """A tool that guesses next best move on giving input in FEN(Forsyth–Edwards Notation) format
+    Args:
+    fen: A string representing a valid FEN chess format (e.g.,'r1bqkbnr/pppppppp/n7/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq - 2 2').
+    """
+    url = "https://lichess.org/api/cloud-eval"
+    params = {
+        "fen": fen,
+        "multiPv": 1,
+        "variant": "standard",
+    }
+    headers = {
+        "Accept": "application/json"
+    }
+
+    response = requests.get(url, params=params, headers=headers)
+    
+    if response.status_code != 200:
+        raise RuntimeError(f"Failed to query Lichess API: {response.status_code} - {response.text}")
+    
+    data = response.json()
+    best = data.get("pvs", [])[0]
+    return best.get("moves", "").split()[0]
+
+
 # Below is an example of a tool that does nothing. Amaze us with your creativity !
 @tool
 def my_custom_tool(arg1:str, arg2:int)-> str: #it's import to specify the return type