diff --git a/damastodon.py b/damastodon.py
index 08c000d..919b531 100755
--- a/damastodon.py
+++ b/damastodon.py
@@ -28,38 +28,48 @@ def check_message(notification):
 		content = content[len(botname):]
 		saves = os.listdir(save_position)
 		if content.lower() == "help":
-			mastodon.status_post("Hello @"+account+",\nchallenge an user by writing to me\nCHALL <USERNAME>\nEx. \"CHALL @someone@mastdn.inst.wxyz\"\nThe challenger takes WHITE and begins the match.\nFor movements and jumps, write the coords separated by spaces.\nEx. \"A4 B5\" (normal movement) or \"A4 C6 D8\" (double jump)\nQUIT ends the match.\nCommands are NOT case sensitive..",visibility="direct")
+			mastodon.status_post("Hello @"+account+" \nchallenge an user by writing to me\nCHALL <USERNAME>\nEx. \"CHALL @someone@mastdn.inst.wxyz\"\nThe challenger takes WHITE and begins the match.\nFor movements and jumps, write the coords separated by spaces.\nEx. \"A4 B5\" (normal movement) or \"A4 C6 D8\" (double jump)\nQUIT ends the match.\nCommands are NOT case sensitive..",visibility="direct")
 			return
 		if not os.path.exists(save_position+account):
-			if content[:5].lower() == "sfida":
+			try:
+				challenged = notification["status"]["mentions"][1]["acct"]
+			except:
+				mastodon.status_post("Hello @"+account+" \n your request is not valid")
+				return
+			if content[:5].lower() == "chall":
 				file_save_white = [sv for sv in saves if account in sv]
-				file_save_black = [sv for sv in saves if content[:6] in sv]
+				file_save_black = [sv for sv in saves if challenged in sv]
 				if len(file_save_white) > 0:
-					mastodon.status_post("Hello @"+account+",\n you're already playing a match")
+					mastodon.status_post("Hello @"+account+" \n you're already playing a match")
 					return
 				elif len(file_save_black):
-					mastodon.status_post("Hello @"+content[7:]+",\n is already playing a match")
+					mastodon.status_post("Hello @"+account+" \n the user you challenged is already playing a match")
 					return
 				else:
 					open(save_position+account,"w").close()
-					ident = mastodon.status_post("Hello @"+content[7:]+",\n@"+account+" challenged you to a match of draughts! Anzwer \n@"+account+" OK\n to accept the chellenge or \n@"+account+" NO\n to cancel.",visibility="direct")
+					ident = mastodon.status_post("Hello @"+challenged+" \n@"+account+" challenged you to a match of draughts! Answer \n@"+account+" OK\n to accept the chellenge or \n@"+account+" NO\n to cancel.",visibility="direct")
 					return
 			elif content.split(" ")[1].lower() == "ok":
-				os.symlink(content.split(" ")[0][1:],save_position+account)
+				try:
+					challenger = notification["status"]["mentions"][1]["acct"]
+				except:
+					mastodon.status_post("Hello @"+account+" \n your request is not valid")
+					return
+				os.symlink(save_position+challenger,save_position+account)
 				board = dama.init_board()
-				with open(account,"wb") as f:
+				with open(save_position+account,"wb") as f:
 					pickle.dump("@"+account,f)
-					pickle.dump(content.split(" ")[0],f)
+					pickle.dump("@"+challenger,f)
 					pickle.dump(False,f)
 					pickle.dump(board,f)
-				mastodon.status_post("◾: @"+account+" ◽: "+content.split(" ")[0]+" turn ◽\n"+dama.draw_checkerboard(board,space="🟥 ",white_norm="◽ ",white_knight="⚪ ",black_norm="◾ ",black_knight="⚫ ",empty="🟦 ",frstrow="0🇦 🇧 🇨 🇩 🇪 🇫 🇬 🇭 \n"),visibility="direct")
+				mastodon.status_post("◾: @"+account+" ◽: @"+challenger+" turn ◽\n"+dama.draw_checkerboard(board,space="🟥 ",white_norm="◽ ",white_knight="⚪ ",black_norm="◾ ",black_knight="⚫ ",empty="🟦 ",frstrow="0🇦 🇧 🇨 🇩 🇪 🇫 🇬 🇭 \n"),visibility="direct")
 				return
 			elif content.split(" ")[1].lower() == "no":
 				os.remove(save_position+content.split(" ")[0][1:])
 				mastodon.status_post(account+" you cancelled the challenge from "+content.split(" ")[0],visibility="direct")
 				return
 			else:
-				mastodon.status_post("Hello @"+account+" I can't understand your commend or you're not in a match.\nWrite HELP to see the list of available commands.",visibility="direct")
+				mastodon.status_post("Hello @"+account+" \nI can't understand your command or you're not in a match.\nWrite HELP to see the list of available commands.",visibility="direct")
 				return
 		else:
 			with open(save_position+account,"rb") as f:
@@ -75,7 +85,7 @@ def check_message(notification):
 			if (black == "@"+account and turn == 1) or (white == "@"+account and turn == 0):
 				board = dama.valid_move(content.lower(),turn,board)
 				if board == -1:
-					mastodon.status_post("@"+account+"\nInvalid move.",visibility="direct")
+					mastodon.status_post("@"+account+" \nInvalid move.",visibility="direct")
 					return
 				else:
 					with open(save_position+account,"wb") as f:
@@ -102,7 +112,7 @@ def check_message(notification):
 						mastodon.status_post("◾: "+black+" ◽: "+white+"\n"+winner_t+" WINS!\n"+dama.draw_checkerboard(board,space="🟥 ",white_norm="◽ ",white_knight="⚪ ",black_norm="◾ ",black_knight="⚫ ",empty="🟦 ",frstrow="0🇦 🇧 🇨 🇩 🇪 🇫 🇬 🇭 \n"),visibility="direct")
 						return
 			else:
-				mastodon.status_post("@"+account+"\nIt's not your turn.",visibility="direct")
+				mastodon.status_post("@"+account+" \nIt's not your turn.",visibility="direct")
 				return		
 
 if __name__ == "__main__":
diff --git a/draughts_engine.py b/draughts_engine.py
index 37a8006..fcc4212 100755
--- a/draughts_engine.py
+++ b/draughts_engine.py
@@ -1,5 +1,7 @@
 #!/usr/bin/python3
 
+import re
+
 def draw_checkerboard(status,space="▒",white_norm="h",white_knight="H",black_norm="b",black_knight="B",empty=" ",frstrow=" abcdefgh\n"):
 	bstr = ""
 	bstr += frstrow
@@ -46,10 +48,13 @@ def row_column_translation(row,col):
 		return row,cols.index(ord(col))
 
 def valid_move(pos_toParse,turn,board):
-	pos = pos_toParse.split(" ") #tricky part, pos[0] is the starting cell, pos[1] to pos[n] the destination point(s), for every coord, [x][0] is the column (the letter) and [x][1] the row (the number)
-	for rowcol in pos:
-		if (rowcol[0] not in ("a","b","c","d","e","f","g","h")) or (rowcol[1] not in ("1","2","3","4","5","6","7","8")): #check if the positions are valid
-			return -1
+	#pos = pos_toParse.split(" ") #tricky part, pos[0] is the starting cell, pos[1] to pos[n] the destination point(s), for every coord, [x][0] is the column (the letter) and [x][1] the row (the number)
+	pos = re.findall("\\b[abcdefgh][12345678]\\b",pos_toParse)
+	#for rowcol in pos:
+	#	if (rowcol[0] not in ("a","b","c","d","e","f","g","h")) or (rowcol[1] not in ("1","2","3","4","5","6","7","8")): #check if the positions are valid
+	#		return -1
+	if len(pos) < 2:
+		return -1
 	row_start,col_start = row_column_translation(pos[0][1],pos[0][0])
 	if(row_start == -1):
 		return -1