diff --git a/server/cardnet.cpp b/server/cardnet.cpp
index 47861b8..6fea1d3 100644
--- a/server/cardnet.cpp
+++ b/server/cardnet.cpp
@@ -1,11 +1,11 @@
 /*
-Compiler: MinGW g++ 6.3.0 
+Compiler: MinGW g++ 6.3.0 (Windows)
+          MinGW g++ 5.3.1 (Ubuntu 16.04)
 Flags: -std=c++11 -static-libgcc -static-libstdc++ -lws2_32
 Run ex: cardnet.exe -c1="G:\card0.txt" -c2="H:\card0.txt" -l1="G:\check.txt" -l2="H:\check.txt" -p="4500"
 
 TODO:
 Fix extra buffer character (maybe, it occurs in telnet)
-Fix validation for file checker file
 Change card0.txt file based on information given by client (p1/p2)
 */
 
@@ -20,7 +20,9 @@ Change card0.txt file based on information given by client (p1/p2)
 #pragma comment(lib,"ws2_32.lib") //Winsock Library
 
 void exampleMessage();
+void debugOutput(std::string);
 bool checkExist(std::string);
+bool overwriteCard(std::string, std::string);
 
 int main (int argc, char* argv[])
 {
@@ -70,11 +72,11 @@ int main (int argc, char* argv[])
     if(card_p1 == "" || check_p1 == "" || port < 1 || port > 65535) // failed validation
         exampleMessage();
 
-    std::cout << "Card P1:\t" << card_p1 << std::endl;
-    std::cout << "Card P2:\t" << card_p2 << std::endl;
-    std::cout << "Check P1:\t" << check_p1 << std::endl;
-    std::cout << "Check P2:\t" << check_p2 << std::endl;
-    std::cout << "Port:\t\t" << port << std::endl;
+    debugOutput("Card P1:\t" + card_p1 + "\n");
+    debugOutput("Card P2:\t" + card_p2 + "\n");
+    debugOutput("Check P1:\t" + check_p1 + "\n");
+    debugOutput("Check P2:\t" + check_p2 + "\n");
+    debugOutput("Port\t\t" + std::to_string(port) + "\n");
 
     // begin socket work - copy and pasted below (http://www.binarytides.com/code-tcp-socket-server-winsock/)
     WSADATA wsa;
@@ -83,7 +85,7 @@ int main (int argc, char* argv[])
     int max_clients = 30 , activity, addrlen, i, valread;
      
     //size of our receive buffer, this is string length.
-    int MAXRECV = 19;
+    int MAXRECV = 18;
     //set of socket descriptors
     fd_set readfds;
     //1 extra for null character, string termination
@@ -242,36 +244,51 @@ int main (int argc, char* argv[])
                     buffer[valread] = '\0';
                     
                     // the 'buffer' is the string to use to edit our card0.txt file
-                    std::regex cardRegex("[p,P][1,2]:[e,E]004[(0-9)(a-f)(A-F)]{12}"); // 16 digit hexadecimal starting with e004; ex: p1:e004abcdef123456
+                    std::regex cardRegex("[1,2]:[e,E]004[(0-9)(a-f)(A-F)]{12}"); // 16 digit hexadecimal starting with e004; ex: 1:e004abcdef123456
                     if(std::regex_match(buffer, cardRegex)) 
                     {
                         
                         printf("\nRecieved by: %s:%d contains: %s \n" , inet_ntoa(address.sin_addr) , ntohs(address.sin_port), buffer);
-                        std::cout << "Data recieved is a valid game card" << std::endl;
+                        debugOutput("Data recieved is a valid game card\n");
 
                         // validate if buffer string is for p1 or p2
+                        if(buffer[0] == '1') //p1
+                        {
+                            debugOutput("Looking for P1 check file in: " + check_p1 + "... ");
+                            if(checkExist(check_p1))
+                            {
+                                debugOutput("Found!\n");
+            
+                                overwriteCard(buffer, card_p1);
+                            }
+                            else
+                            {
+                                debugOutput("Not found!\nSkipping overwrite of card0\n");
+                            }
+                        }
+                        else //p2
+                        {
+                            debugOutput("Looking for P2 check file in: " + check_p2 + "... ");
+                            if(checkExist(check_p2))
+                            {
+                                debugOutput("Found!\n");
+
+                                overwriteCard(buffer, card_p2);
+                            }
+                            else
+                            {
+                                debugOutput("Not found!\nSkipping overwrite of card0\n");
+                            }
+                        }
 
                         // check for the checker file apporiately
-                        std::cout << "Looking for check file in: "<< check_p1 << "... "<< (checkExist(check_p1) ? "Found" : "Not found") << std::endl; //test
+                        //std::cout << "Looking for check file in: "<< check_p1 << "... "<< (checkExist(check_p1) ? "Found" : "Not found") << std::endl; //test
                     }
                     else // don't do anything if not valid
                     {
                         // this needs work, it may get an extra character in the buffer and goes in here
                         //std::cout << "Data recieved is not a valid game card" << std::endl;
                     }
-                    // check if the check file exists
-                    //if(std::ifstream(check))
-                    //{
-                        // check file exists, rewrite 
-                        // regex to validate buffer is a e004 hex number
-                        
-                        
-                    //}
-                    //else
-                    //{
-                        // no check file
-                    //    std::cout << "No check file! Will not re-write: " << file << std::endl;
-                    //}
                     //send( s , "recieved" , valread , 0 );
                 }
             }
@@ -297,8 +314,23 @@ void exampleMessage() // help menu
     exit(0);
 }
 
+void debugOutput(std::string text) // debugging text output
+{
+    std::cout << text;
+}
+
 bool checkExist (std::string fileName)
 {
     std::ifstream infile(fileName);
     return infile.good();
+}
+
+bool overwriteCard(std::string buffer, std::string location)
+{
+    // split card up from data
+    std::string card (buffer);
+    card = card.substr(2, 16); // remove player number and colon (1:) to produce card number only
+
+    // check if card exists
+    debugOutput("Card data: " + card + "\n");
 }
\ No newline at end of file
diff --git a/server/cardnet.exe b/server/cardnet.exe
index a044edc..769b506 100755
Binary files a/server/cardnet.exe and b/server/cardnet.exe differ