license & uci

14 files changed, 1768 insertions, 40 deletions

diff --git a/.clangd b/.clangd
index 764bc55..a5e5c6b 100644
--- a/.clangd
+++ b/.clangd
@@ -1,3 +1,4 @@
 CompileFlags:
   Add: [-Wno-override-init]
+  Compiler: arm-none-eabi-gcc
 
diff --git a/.gitignore b/.gitignore
index b27909b..104c591 100755
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,4 @@
 build
 *.o
-stockfish
 generated
+opt
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..f288702
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
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+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
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+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
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+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.
diff --git a/build.c b/build.c
index 041bb57..8af54da 100644
--- a/build.c
+++ b/build.c
@@ -29,10 +29,11 @@ void print_cmd(char** args) {
   printf("\n");
 }
 
-int clean_mode();
-int test_mode();
-int server_mode();
-int engine_mode();
+int clean_mode(int run_mode);
+int test_mode(int run_mode);
+int server_mode(int run_mode);
+int engine_mode(int run_mode);
+int uci_mode(int run_mode);
 
 // https://github.com/tsoding/nob.h/blob/0a08926d8094fc4ae678155c5d73ae21d1f96f3f/nob.h#L2413
 int needs_rebuild(char* bin_file, char* source_file) {
@@ -54,6 +55,7 @@ int needs_rebuild(char* bin_file, char* source_file) {
 
 #define ENGINE_O "output/engine.o"
 #define SERVER_O "output/server.o"
+#define UCI_O "output/uci.o"
 #define LOG_O "output/log.o"
 
 #define LOGGER_C "src/logger/logger.c"
@@ -69,60 +71,83 @@ int main(int argc, char** argv) {
     execvp(argv[0], argv);
   }
 
-  RUN_CMD({"rm", "/dev/mqueue/logs", NULL});
   RUN_CMD({"mkdir", "-p", "output", NULL});
 
-  if (argc > 1) {
-    if (strcmp(argv[1], "test") == 0) {
-      return test_mode();
-    }
-    if (strcmp(argv[1], "server") == 0) {
-      RUN_CMD({CC, "src/log.c", "-o", LOG_O, NULL});
-      return server_mode();
-    }
-    if (strcmp(argv[1], "clean") == 0) {
-      RUN_CMD({CC, "src/log.c", "-o", LOG_O, NULL});
-      return clean_mode();
-    }
+  if (argc <= 1) return 1;
+  int run_mode = argc == 3;
+
+  if (strcmp(argv[1], "test") == 0) {
+    return test_mode(run_mode);
+  }
+  if (strcmp(argv[1], "clean") == 0) {
+    return clean_mode(run_mode);
+  }
+  if (strcmp(argv[1], "uci") == 0) {
+    return uci_mode(run_mode);
+  }
+  RUN_CMD({CC, "src/log.c", "-o", LOG_O, NULL});
+  if (strcmp(argv[1], "engine") == 0) {
+    return engine_mode(run_mode);
+  }
+  if (strcmp(argv[1], "server") == 0) {
+    return server_mode(run_mode);
   }
-  return engine_mode();
 }
 
-int clean_mode() {
+int clean_mode(int _) {
   char* args[] = {"rm", "-r", "output", NULL};
   print_cmd(args);
   execvp(args[0], args);
   return 0;
 }
 
-int test_mode() {
+int test_mode(int run_mode) {
+  if (run_mode) {
+    char* args[] = {"./output/test.o", NULL};
+    print_cmd(args);
+    execvp(args[0], args);
+  }
+
   RUN_CMD({CC, "generate/find_tests.c", LOGGER_C, "-o", "output/find_tests.o", NULL});
   RUN_CMD({"./output/find_tests.o", NULL});
   printf("\n");
   RUN_CMD({CC, "tests/main.c", LOGGER_C, "-o", "output/test.o", NULL});
-
-  char* args[] = {"./output/test.o", NULL};
-  print_cmd(args);
-  execvp(args[0], args);
-  return 0;
+  return status != 0;
 }
 
-int server_mode() {
-  RUN_CMD({"rm", "/dev/mqueue/server_to_engine", "/dev/mqueue/engine_to_server", NULL});
+int server_mode(int run_mode) {
+  if (run_mode) {
+    RUN_CMD({"rm", "/dev/mqueue/logs", NULL});
+    RUN_CMD({"rm", "/dev/mqueue/server_to_engine", "/dev/mqueue/engine_to_server", NULL});
+    char* args[] = {LOG_O, SERVER_O, ENGINE_O, NULL};
+    print_cmd(args);
+    execvp(args[0], args);
+  }
+
   RUN_CMD({CC, "src/server.c", LOGGER_C, "-lcrypto", "-o", SERVER_O, NULL});
   RUN_CMD({CC, "src/engine.c", LOGGER_C, "-o", ENGINE_O, NULL});
-
-  char* args[] = {LOG_O, SERVER_O, ENGINE_O, NULL};
-  print_cmd(args);
-  execvp(args[0], args);
-  return 0;
+  return status != 0;
 }
 
-int engine_mode() {
+int engine_mode(int run_mode) {
+  if (run_mode) {
+    RUN_CMD({"rm", "/dev/mqueue/logs", NULL});
+    char* args[] = {LOG_O, ENGINE_O, NULL};
+    print_cmd(args);
+    execvp(args[0], args);
+  }
+
   RUN_CMD({CC, "src/engine.c", LOGGER_C, "-o", ENGINE_O, NULL});
+  return status != 0;
+}
 
-  char* args[] = {LOG_O, ENGINE_O, NULL};
-  print_cmd(args);
-  execvp(args[0], args);
-  return 0;
+int uci_mode(int run_mode) {
+  if (run_mode) {
+    char* args[] = {UCI_O, NULL};
+    print_cmd(args);
+    execvp(args[0], args);
+  }
+
+  RUN_CMD({CC, "src/uci.c", "-o", UCI_O, NULL});
+  return status != 0;
 }
diff --git a/shell.nix b/shell.nix
index 9d0bdbb..092bd0e 100644
--- a/shell.nix
+++ b/shell.nix
@@ -1,10 +1,41 @@
 { pkgs ? import <nixpkgs> {} }:
-
+let
+  install_opt_deps = false;
+  libraries = with pkgs; [
+    webkitgtk_4_1
+    gtk3
+    cairo
+    gdk-pixbuf
+    glib
+    dbus
+    openssl
+    librsvg
+  ];
+in
 pkgs.mkShell {
   packages = with pkgs; [
     gcc
+    glib.dev
+    pango
     openssl
     pkg-config
+    clang-tools
     gnumake
-  ];
+  ] ++ (if install_opt_deps then [
+    dbus
+    gtk3
+    libsoup_3
+    webkitgtk_4_1
+    librsvg
+    nodejs_22
+    pnpm
+    cargo
+    rustc
+    rustup
+  ] else []);
+  RUST_SRC_PATH = if install_opt_deps then "${pkgs.rust.packages.stable.rustPlatform.rustLibSrc}" else "";
+  shellHook = if install_opt_deps then ''
+    export LD_LIBRARY_PATH=${pkgs.lib.makeLibraryPath libraries}:$LD_LIBRARY_PATH
+    export XDG_DATA_DIRS=${pkgs.gsettings-desktop-schemas}/share/gsettings-schemas/${pkgs.gsettings-desktop-schemas.name}:${pkgs.gtk3}/share/gsettings-schemas/${pkgs.gtk3.name}:$XDG_DATA_DIRS
+  '' else '';
 }
diff --git a/src/uci.c b/src/uci.c
new file mode 100644
index 0000000..3c45765
--- /dev/null
+++ b/src/uci.c
@@ -0,0 +1,55 @@
+#include <stdio.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+#include "uci/command.h"
+#include "uci/response.h"
+
+void load_from_message(ucicmd* cmd, const char* message) {
+  char token[MAX_TOKEN_SIZE];
+  int i = 0, k = 0;
+
+  while (
+    message[i] != 0 &&
+    message[i] != '\n' &&
+    message[i] != '\r'
+  ) {
+    if (message[i] != ' ') { 
+      token[k++] = message[i++];
+      continue;
+    }
+    if (k == 0) {
+      i++;
+      continue;
+    }
+    i++;
+    token[k] = 0;
+    ucicmd_add(cmd, token);
+    k = 0;
+  }
+  token[k] = 0;
+  ucicmd_add(cmd, token);
+}
+
+int main() {
+  // https://stackoverflow.com/a/41559081
+  fcntl(STDIN_FILENO, F_SETFL, O_NONBLOCK);
+
+  ucicmd cmd = ucicmd_init();
+  size_t n;
+  char buf[1024];
+  while (true) {
+    cmd.empty = true;
+    cmd.args_count = 0;
+    ssize_t n = read(STDIN_FILENO, buf, sizeof(buf));
+    if (n > 0) {
+      load_from_message(&cmd, buf);
+    }
+    handle_uci(cmd);
+  }
+}
+
+#include "uci/command.c"
+#include "uci/response.c"
diff --git a/src/uci/UCI-Protocol-Specification.txt b/src/uci/UCI-Protocol-Specification.txt
new file mode 100644
index 0000000..f28b730
--- /dev/null
+++ b/src/uci/UCI-Protocol-Specification.txt
@@ -0,0 +1,544 @@
+// Dowloaded from: http://download.shredderchess.com/div/uci.zip
+
+Description of the universal chess interface (UCI)    April  2006
+=================================================================
+
+* The specification is independent of the operating system. For Windows,
+  the engine is a normal exe file, either a console or "real" windows application.
+
+* all communication is done via standard input and output with text commands,
+
+* The engine should boot and wait for input from the GUI,
+  the engine should wait for the "isready" or "setoption" command to set up its internal parameters
+  as the boot process should be as quick as possible.
+
+* the engine must always be able to process input from stdin, even while thinking.
+
+* all command strings the engine receives will end with '\n',
+  also all commands the GUI receives should end with '\n',
+  Note: '\n' can be 0x0d or 0x0a0d or any combination depending on your OS.
+  If you use Engine and GUI in the same OS this should be no problem if you communicate in text mode,
+  but be aware of this when for example running a Linux engine in a Windows GUI.
+
+* arbitrary white space between tokens is allowed
+  Example: "debug on\n" and  "   debug     on  \n" and "\t  debug \t  \t\ton\t  \n"
+  all set the debug mode of the engine on.
+
+* The engine will always be in forced mode which means it should never start calculating
+  or pondering without receiving a "go" command first.
+
+* Before the engine is asked to search on a position, there will always be a position command
+  to tell the engine about the current position.
+
+* by default all the opening book handling is done by the GUI,
+  but there is an option for the engine to use its own book ("OwnBook" option, see below)
+
+* if the engine or the GUI receives an unknown command or token it should just ignore it and try to
+  parse the rest of the string in this line.
+  Examples: "joho debug on\n" should switch the debug mode on given that joho is not defined,
+            "debug joho on\n" will be undefined however.
+
+* if the engine receives a command which is not supposed to come, for example "stop" when the engine is
+  not calculating, it should also just ignore it.
+  
+
+Move format:
+------------
+
+The move format is in long algebraic notation.
+A nullmove from the Engine to the GUI should be sent as 0000.
+Examples:  e2e4, e7e5, e1g1 (white short castling), e7e8q (for promotion)
+
+
+
+GUI to engine:
+--------------
+
+These are all the command the engine gets from the interface.
+
+* uci
+	tell engine to use the uci (universal chess interface),
+	this will be sent once as a first command after program boot
+	to tell the engine to switch to uci mode.
+	After receiving the uci command the engine must identify itself with the "id" command
+	and send the "option" commands to tell the GUI which engine settings the engine supports if any.
+	After that the engine should send "uciok" to acknowledge the uci mode.
+	If no uciok is sent within a certain time period, the engine task will be killed by the GUI.
+
+* debug [ on | off ]
+	switch the debug mode of the engine on and off.
+	In debug mode the engine should send additional infos to the GUI, e.g. with the "info string" command,
+	to help debugging, e.g. the commands that the engine has received etc.
+	This mode should be switched off by default and this command can be sent
+	any time, also when the engine is thinking.
+
+* isready
+	this is used to synchronize the engine with the GUI. When the GUI has sent a command or
+	multiple commands that can take some time to complete,
+	this command can be used to wait for the engine to be ready again or
+	to ping the engine to find out if it is still alive.
+	E.g. this should be sent after setting the path to the tablebases as this can take some time.
+	This command is also required once before the engine is asked to do any search
+	to wait for the engine to finish initializing.
+	This command must always be answered with "readyok" and can be sent also when the engine is calculating
+	in which case the engine should also immediately answer with "readyok" without stopping the search.
+
+* setoption name <id> [value <x>]
+	this is sent to the engine when the user wants to change the internal parameters
+	of the engine. For the "button" type no value is needed.
+	One string will be sent for each parameter and this will only be sent when the engine is waiting.
+	The name and value of the option in <id> should not be case sensitive and can inlude spaces.
+	The substrings "value" and "name" should be avoided in <id> and <x> to allow unambiguous parsing,
+	for example do not use <name> = "draw value".
+	Here are some strings for the example below:
+	   "setoption name Nullmove value true\n"
+      "setoption name Selectivity value 3\n"
+	   "setoption name Style value Risky\n"
+	   "setoption name Clear Hash\n"
+	   "setoption name NalimovPath value c:\chess\tb\4;c:\chess\tb\5\n"
+
+* register
+	this is the command to try to register an engine or to tell the engine that registration
+	will be done later. This command should always be sent if the engine	has sent "registration error"
+	at program startup.
+	The following tokens are allowed:
+	* later
+	   the user doesn't want to register the engine now.
+	* name <x>
+	   the engine should be registered with the name <x>
+	* code <y>
+	   the engine should be registered with the code <y>
+	Example:
+	   "register later"
+	   "register name Stefan MK code 4359874324"
+
+* ucinewgame
+   this is sent to the engine when the next search (started with "position" and "go") will be from
+   a different game. This can be a new game the engine should play or a new game it should analyse but
+   also the next position from a testsuite with positions only.
+   If the GUI hasn't sent a "ucinewgame" before the first "position" command, the engine shouldn't
+   expect any further ucinewgame commands as the GUI is probably not supporting the ucinewgame command.
+   So the engine should not rely on this command even though all new GUIs should support it.
+   As the engine's reaction to "ucinewgame" can take some time the GUI should always send "isready"
+   after "ucinewgame" to wait for the engine to finish its operation.
+   
+* position [fen <fenstring> | startpos ]  moves <move1> .... <movei>
+	set up the position described in fenstring on the internal board and
+	play the moves on the internal chess board.
+	if the game was played  from the start position the string "startpos" will be sent
+	Note: no "new" command is needed. However, if this position is from a different game than
+	the last position sent to the engine, the GUI should have sent a "ucinewgame" inbetween.
+
+* go
+	start calculating on the current position set up with the "position" command.
+	There are a number of commands that can follow this command, all will be sent in the same string.
+	If one command is not sent its value should be interpreted as it would not influence the search.
+	* searchmoves <move1> .... <movei>
+		restrict search to this moves only
+		Example: After "position startpos" and "go infinite searchmoves e2e4 d2d4"
+		the engine should only search the two moves e2e4 and d2d4 in the initial position.
+	* ponder
+		start searching in pondering mode.
+		Do not exit the search in ponder mode, even if it's mate!
+		This means that the last move sent in in the position string is the ponder move.
+		The engine can do what it wants to do, but after a "ponderhit" command
+		it should execute the suggested move to ponder on. This means that the ponder move sent by
+		the GUI can be interpreted as a recommendation about which move to ponder. However, if the
+		engine decides to ponder on a different move, it should not display any mainlines as they are
+		likely to be misinterpreted by the GUI because the GUI expects the engine to ponder
+	   on the suggested move.
+	* wtime <x>
+		white has x msec left on the clock
+	* btime <x>
+		black has x msec left on the clock
+	* winc <x>
+		white increment per move in mseconds if x > 0
+	* binc <x>
+		black increment per move in mseconds if x > 0
+	* movestogo <x>
+      there are x moves to the next time control,
+		this will only be sent if x > 0,
+		if you don't get this and get the wtime and btime it's sudden death
+	* depth <x>
+		search x plies only.
+	* nodes <x>
+	   search x nodes only,
+	* mate <x>
+		search for a mate in x moves
+	* movetime <x>
+		search exactly x mseconds
+	* infinite
+		search until the "stop" command. Do not exit the search without being told so in this mode!
+    
+* stop
+	stop calculating as soon as possible,
+	don't forget the "bestmove" and possibly the "ponder" token when finishing the search
+
+* ponderhit
+	the user has played the expected move. This will be sent if the engine was told to ponder on the same move
+	the user has played. The engine should continue searching but switch from pondering to normal search.
+
+* quit
+	quit the program as soon as possible
+
+
+Engine to GUI:
+--------------
+
+* id
+	* name <x>
+		this must be sent after receiving the "uci" command to identify the engine,
+		e.g. "id name Shredder X.Y\n"
+	* author <x>
+		this must be sent after receiving the "uci" command to identify the engine,
+		e.g. "id author Stefan MK\n"
+
+* uciok
+	Must be sent after the id and optional options to tell the GUI that the engine
+	has sent all infos and is ready in uci mode.
+
+* readyok
+	This must be sent when the engine has received an "isready" command and has
+	processed all input and is ready to accept new commands now.
+	It is usually sent after a command that can take some time to be able to wait for the engine,
+	but it can be used anytime, even when the engine is searching,
+	and must always be answered with "isready".
+
+* bestmove <move1> [ ponder <move2> ]
+	the engine has stopped searching and found the move <move> best in this position.
+	the engine can send the move it likes to ponder on. The engine must not start pondering automatically.
+	this command must always be sent if the engine stops searching, also in pondering mode if there is a
+	"stop" command, so for every "go" command a "bestmove" command is needed!
+	Directly before that the engine should send a final "info" command with the final search information,
+	the the GUI has the complete statistics about the last search.
+
+* copyprotection
+	this is needed for copyprotected engines. After the uciok command the engine can tell the GUI,
+	that it will check the copy protection now. This is done by "copyprotection checking".
+	If the check is ok the engine should send "copyprotection ok", otherwise "copyprotection error".
+	If there is an error the engine should not function properly but should not quit alone.
+	If the engine reports "copyprotection error" the GUI should not use this engine
+	and display an error message instead!
+	The code in the engine can look like this
+      TellGUI("copyprotection checking\n");
+	   // ... check the copy protection here ...
+	   if(ok)
+	      TellGUI("copyprotection ok\n");
+      else
+         TellGUI("copyprotection error\n");
+         
+* registration
+	this is needed for engines that need a username and/or a code to function with all features.
+	Analog to the "copyprotection" command the engine can send "registration checking"
+	after the uciok command followed by either "registration ok" or "registration error".
+	Also after every attempt to register the engine it should answer with "registration checking"
+	and then either "registration ok" or "registration error".
+	In contrast to the "copyprotection" command, the GUI can use the engine after the engine has
+	reported an error, but should inform the user that the engine is not properly registered
+	and might not use all its features.
+	In addition the GUI should offer to open a dialog to
+	enable registration of the engine. To try to register an engine the GUI can send
+	the "register" command.
+	The GUI has to always answer with the "register" command	if the engine sends "registration error"
+	at engine startup (this can also be done with "register later")
+	and tell the user somehow that the engine is not registered.
+	This way the engine knows that the GUI can deal with the registration procedure and the user
+	will be informed that the engine is not properly registered.
+	      
+* info
+	the engine wants to send information to the GUI. This should be done whenever one of the info has changed.
+	The engine can send only selected infos or multiple infos with one info command,
+	e.g. "info currmove e2e4 currmovenumber 1" or
+	     "info depth 12 nodes 123456 nps 100000".
+	Also all infos belonging to the pv should be sent together
+	e.g. "info depth 2 score cp 214 time 1242 nodes 2124 nps 34928 pv e2e4 e7e5 g1f3"
+	I suggest to start sending "currmove", "currmovenumber", "currline" and "refutation" only after one second
+	to avoid too much traffic.
+	Additional info:
+	* depth <x>
+		search depth in plies
+	* seldepth <x>
+		selective search depth in plies,
+		if the engine sends seldepth there must also be a "depth" present in the same string.
+	* time <x>
+		the time searched in ms, this should be sent together with the pv.
+	* nodes <x>
+		x nodes searched, the engine should send this info regularly
+	* pv <move1> ... <movei>
+		the best line found
+	* multipv <num>
+		this for the multi pv mode.
+		for the best move/pv add "multipv 1" in the string when you send the pv.
+		in k-best mode always send all k variants in k strings together.
+	* score
+		* cp <x>
+			the score from the engine's point of view in centipawns.
+		* mate <y>
+			mate in y moves, not plies.
+			If the engine is getting mated use negative values for y.
+		* lowerbound
+	      the score is just a lower bound.
+		* upperbound
+		   the score is just an upper bound.
+	* currmove <move>
+		currently searching this move
+	* currmovenumber <x>
+		currently searching move number x, for the first move x should be 1 not 0.
+	* hashfull <x>
+		the hash is x permill full, the engine should send this info regularly
+	* nps <x>
+		x nodes per second searched, the engine should send this info regularly
+	* tbhits <x>
+		x positions where found in the endgame table bases
+	* sbhits <x>
+		x positions where found in the shredder endgame databases
+	* cpuload <x>
+		the cpu usage of the engine is x permill.
+	* string <str>
+		any string str which will be displayed be the engine,
+		if there is a string command the rest of the line will be interpreted as <str>.
+	* refutation <move1> <move2> ... <movei>
+	   move <move1> is refuted by the line <move2> ... <movei>, i can be any number >= 1.
+	   Example: after move d1h5 is searched, the engine can send
+	   "info refutation d1h5 g6h5"
+	   if g6h5 is the best answer after d1h5 or if g6h5 refutes the move d1h5.
+	   if there is no refutation for d1h5 found, the engine should just send
+	   "info refutation d1h5"
+		The engine should only send this if the option "UCI_ShowRefutations" is set to true.
+	* currline <cpunr> <move1> ... <movei>
+	   this is the current line the engine is calculating. <cpunr> is the number of the cpu if
+	   the engine is running on more than one cpu. <cpunr> = 1,2,3....
+	   if the engine is just using one cpu, <cpunr> can be omitted.
+	   If <cpunr> is greater than 1, always send all k lines in k strings together.
+		The engine should only send this if the option "UCI_ShowCurrLine" is set to true.
+	
+
+* option
+	This command tells the GUI which parameters can be changed in the engine.
+	This should be sent once at engine startup after the "uci" and the "id" commands
+	if any parameter can be changed in the engine.
+	The GUI should parse this and build a dialog for the user to change the settings.
+	Note that not every option needs to appear in this dialog as some options like
+	"Ponder", "UCI_AnalyseMode", etc. are better handled elsewhere or are set automatically.
+	If the user wants to change some settings, the GUI will send a "setoption" command to the engine.
+	Note that the GUI need not send the setoption command when starting the engine for every option if
+	it doesn't want to change the default value.
+	For all allowed combinations see the examples below,
+	as some combinations of this tokens don't make sense.
+	One string will be sent for each parameter.
+	* name <id>
+		The option has the name id.
+		Certain options have a fixed value for <id>, which means that the semantics of this option is fixed.
+		Usually those options should not be displayed in the normal engine options window of the GUI but
+		get a special treatment. "Pondering" for example should be set automatically when pondering is
+		enabled or disabled in the GUI options. The same for "UCI_AnalyseMode" which should also be set
+		automatically by the GUI. All those certain options have the prefix "UCI_" except for the
+		first 6 options below. If the GUI gets an unknown Option with the prefix "UCI_", it should just
+		ignore it and not display it in the engine's options dialog.
+		* <id> = Hash, type is spin
+			the value in MB for memory for hash tables can be changed,
+			this should be answered with the first "setoptions" command at program boot
+			if the engine has sent the appropriate "option name Hash" command,
+			which should be supported by all engines!
+			So the engine should use a very small hash first as default.
+		* <id> = NalimovPath, type string
+			this is the path on the hard disk to the Nalimov compressed format.
+			Multiple directories can be concatenated with ";"
+		* <id> = NalimovCache, type spin
+			this is the size in MB for the cache for the nalimov table bases
+			These last two options should also be present in the initial options exchange dialog
+			when the engine is booted if the engine supports it
+		* <id> = Ponder, type check
+			this means that the engine is able to ponder.
+			The GUI will send this whenever pondering is possible or not.
+			Note: The engine should not start pondering on its own if this is enabled, this option is only
+			needed because the engine might change its time management algorithm when pondering is allowed.
+		* <id> = OwnBook, type check
+			this means that the engine has its own book which is accessed by the engine itself.
+			if this is set, the engine takes care of the opening book and the GUI will never
+			execute a move out of its book for the engine. If this is set to false by the GUI,
+			the engine should not access its own book.
+		* <id> = MultiPV, type spin
+			the engine supports multi best line or k-best mode. the default value is 1
+		* <id> = UCI_ShowCurrLine, type check, should be false by default,
+			the engine can show the current line it is calculating. see "info currline" above.
+		* <id> = UCI_ShowRefutations, type check, should be false by default,
+			the engine can show a move and its refutation in a line. see "info refutations" above.
+		* <id> = UCI_LimitStrength, type check, should be false by default,
+			The engine is able to limit its strength to a specific Elo number,
+		   This should always be implemented together with "UCI_Elo".
+		* <id> = UCI_Elo, type spin
+			The engine can limit its strength in Elo within this interval.
+			If UCI_LimitStrength is set to false, this value should be ignored.
+			If UCI_LimitStrength is set to true, the engine should play with this specific strength.
+		   This should always be implemented together with "UCI_LimitStrength".
+		* <id> = UCI_AnalyseMode, type check
+		   The engine wants to behave differently when analysing or playing a game.
+		   For example when playing it can use some kind of learning.
+		   This is set to false if the engine is playing a game, otherwise it is true.
+		 * <id> = UCI_Opponent, type string
+		   With this command the GUI can send the name, title, elo and if the engine is playing a human
+		   or computer to the engine.
+		   The format of the string has to be [GM|IM|FM|WGM|WIM|none] [<elo>|none] [computer|human] <name>
+		   Examples:
+		   "setoption name UCI_Opponent value GM 2800 human Gary Kasparov"
+		   "setoption name UCI_Opponent value none none computer Shredder"
+		 * <id> = UCI_EngineAbout, type string
+		   With this command, the engine tells the GUI information about itself, for example a license text,
+		   usually it doesn't make sense that the GUI changes this text with the setoption command.
+		   Example:
+			"option name UCI_EngineAbout type string default Shredder by Stefan Meyer-Kahlen, see www.shredderchess.com"
+		* <id> = UCI_ShredderbasesPath, type string
+			this is either the path to the folder on the hard disk containing the Shredder endgame databases or
+			the path and filename of one Shredder endgame datbase.
+	   * <id> = UCI_SetPositionValue, type string
+	      the GUI can send this to the engine to tell the engine to use a certain value in centipawns from white's
+	      point of view if evaluating this specifix position. 
+	      The string can have the formats:
+	      <value> + <fen> | clear + <fen> | clearall
+	   		
+	* type <t>
+		The option has type t.
+		There are 5 different types of options the engine can send
+		* check
+			a checkbox that can either be true or false
+		* spin
+			a spin wheel that can be an integer in a certain range
+		* combo
+			a combo box that can have different predefined strings as a value
+		* button
+			a button that can be pressed to send a command to the engine
+		* string
+			a text field that has a string as a value,
+			an empty string has the value "<empty>"
+	* default <x>
+		the default value of this parameter is x
+	* min <x>
+		the minimum value of this parameter is x
+	* max <x>
+		the maximum value of this parameter is x
+	* var <x>
+		a predefined value of this parameter is x
+	Examples:
+    Here are 5 strings for each of the 5 possible types of options
+	   "option name Nullmove type check default true\n"
+      "option name Selectivity type spin default 2 min 0 max 4\n"
+	   "option name Style type combo default Normal var Solid var Normal var Risky\n"
+	   "option name NalimovPath type string default c:\\n"
+	   "option name Clear Hash type button\n"
+
+
+
+Examples:
+---------
+
+This is how the communication when the engine boots can look like:
+
+GUI     engine
+
+// tell the engine to switch to UCI mode
+uci
+
+// engine identify  
+      id name Shredder
+		id author Stefan MK
+
+// engine sends the options it can change
+// the engine can change the hash size from 1 to 128 MB
+		option name Hash type spin default 1 min 1 max 128
+
+// the engine supports Nalimov endgame tablebases
+		option name NalimovPath type string default <empty>
+		option name NalimovCache type spin default 1 min 1 max 32
+
+// the engine can switch off Nullmove and set the playing style
+	   option name Nullmove type check default true
+  		option name Style type combo default Normal var Solid var Normal var Risky
+
+// the engine has sent all parameters and is ready
+		uciok
+
+// Note: here the GUI can already send a "quit" command if it just wants to find out
+//       details about the engine, so the engine should not initialize its internal
+//       parameters before here.
+// now the GUI sets some values in the engine
+// set hash to 32 MB
+setoption name Hash value 32
+
+// init tbs
+setoption name NalimovCache value 1
+setoption name NalimovPath value d:\tb;c\tb
+
+// waiting for the engine to finish initializing
+// this command and the answer is required here!
+isready
+
+// engine has finished setting up the internal values
+		readyok
+
+// now we are ready to go
+
+// if the GUI is supporting it, tell the engine that is is
+// searching on a game that it hasn't searched on before
+ucinewgame
+
+// if the engine supports the "UCI_AnalyseMode" option and the next search is supposed to
+// be an analysis, the GUI should set "UCI_AnalyseMode" to true if it is currently
+// set to false with this engine
+setoption name UCI_AnalyseMode value true
+
+// tell the engine to search infinite from the start position after 1.e4 e5
+position startpos moves e2e4 e7e5
+go infinite
+
+// the engine starts sending infos about the search to the GUI
+// (only some examples are given)
+
+
+		info depth 1 seldepth 0
+		info score cp 13  depth 1 nodes 13 time 15 pv f1b5 
+		info depth 2 seldepth 2
+		info nps 15937
+		info score cp 14  depth 2 nodes 255 time 15 pv f1c4 f8c5 
+		info depth 2 seldepth 7 nodes 255
+		info depth 3 seldepth 7
+		info nps 26437
+		info score cp 20  depth 3 nodes 423 time 15 pv f1c4 g8f6 b1c3 
+		info nps 41562
+		....
+
+
+// here the user has seen enough and asks to stop the searching
+stop
+
+// the engine has finished searching and is sending the bestmove command
+// which is needed for every "go" command sent to tell the GUI
+// that the engine is ready again
+		bestmove g1f3 ponder d8f6
+
+
+
+Chess960
+========
+
+UCI could easily be extended to support Chess960 (also known as Fischer Random Chess).
+
+The engine has to tell the GUI that it is capable of playing Chess960 and the GUI has to tell
+the engine that is should play according to the Chess960 rules.
+This is done by the special engine option UCI_Chess960. If the engine knows about Chess960
+it should send the command 'option name UCI_Chess960 type check default false'
+to the GUI at program startup.
+Whenever a Chess960 game is played, the GUI should set this engine option to 'true'.
+
+Castling is different in Chess960 and the white king move when castling short is not always e1g1.
+A king move could both be the castling king move or just a normal king move.
+This is why castling moves are sent in the form king "takes" his own rook.
+Example: e1h1 for the white short castle move in the normal chess start position.
+
+In EPD and FEN position strings specifying the castle rights with w and q is not enough as
+there could be more than one rook on the right or left side of the king.
+This is why the castle rights are specified with the letter of the castle rook's line.
+Upper case letters for white's and lower case letters for black's castling rights.
+Example: The normal chess position would be:
+rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w AHah -
+
diff --git a/src/uci/command.c b/src/uci/command.c
new file mode 100644
index 0000000..d82c50c
--- /dev/null
+++ b/src/uci/command.c
@@ -0,0 +1,125 @@
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+#include "command.h"
+
+ucicmd ucicmd_init() {
+  ucicmd output = {0};
+
+  output.empty = true;
+  output.args_capacity = 32;
+  output.args = calloc(sizeof(char) * MAX_TOKEN_SIZE, output.args_capacity);
+
+  return output;
+}
+
+bool is_valid_cmd(const char *token) {
+  return
+    (strcmp(token, "uci") == 0) ||
+    (strcmp(token, "debug") == 0) ||
+    (strcmp(token, "isready") == 0) ||
+    (strcmp(token, "setoption") == 0) ||
+    (strcmp(token, "register") == 0) ||
+    (strcmp(token, "ucinewgame") == 0) ||
+    (strcmp(token, "position") == 0) ||
+    (strcmp(token, "go") == 0) ||
+    (strcmp(token, "stop") == 0) ||
+    (strcmp(token, "ponderhit") == 0) ||
+    (strcmp(token, "quit") == 0) ||
+
+    (strcmp(token, "id") == 0) ||
+    (strcmp(token, "uciok") == 0) ||
+    (strcmp(token, "readyok") == 0) ||
+    (strcmp(token, "bestmove") == 0) ||
+    (strcmp(token, "copyprotection") == 0) ||
+    (strcmp(token, "registration") == 0) ||
+    (strcmp(token, "info") == 0) ||
+    (strcmp(token, "option") == 0);
+}
+
+void ucicmd_add(ucicmd* cmd, const char* token) {
+  if (!cmd->empty) {
+    ucicmd_append_arg(cmd, token);
+    return;
+  }
+  if (is_valid_cmd(token) == 0) return;
+  ucicmd_set_root(cmd, token);
+}
+
+void ucicmd_set_root(ucicmd* cmd, const char* token) {
+  cmd->empty = false;
+  int i = 0;
+  for (; token[i] != 0; i++) {
+    assert(i < MAX_TOKEN_SIZE);
+    cmd->root[i] = token[i];
+  }
+  if (i < MAX_TOKEN_SIZE) cmd->root[i] = 0;
+}
+
+void ucicmd_append_arg(ucicmd* cmd, const char* token) {
+  if (cmd->args_count + 1 > cmd->args_capacity) {
+    cmd->args_capacity += 32;
+    // does realloc set all zeros, like calloc???
+    // NO: https://stackoverflow.com/questions/61237721/does-a-realloc-after-a-calloc-zero-out-bytes
+    cmd->args = realloc(
+      cmd->args,
+      sizeof(char) * MAX_TOKEN_SIZE * cmd->args_capacity
+    );
+    memset(
+      ucicmd_get_arg(*cmd, cmd->args_capacity - 32),
+      0,
+      32 * MAX_TOKEN_SIZE
+    );
+  }
+
+  int shift = cmd->args_count++ * sizeof(char) * MAX_TOKEN_SIZE;
+  int i = 0;
+  for (; token[i] != 0; i++) {
+    assert(i < MAX_TOKEN_SIZE);
+    cmd->args[shift + i] = token[i];
+  }
+  if (i < MAX_TOKEN_SIZE) cmd->args[shift + i] = 0;
+}
+
+char* ucicmd_get_arg(ucicmd cmd, int i) {
+  return cmd.args + i * MAX_TOKEN_SIZE;
+}
+
+void ucicmd_deinit(ucicmd cmd) {
+  free(cmd.args);
+}
+
+
+#ifdef TEST_MOD
+#include <stdbool.h>
+#include <string.h>
+
+bool test_ucicmd() {
+  ucicmd cmd = ucicmd_init();
+  ucicmd_set_root(&cmd, "root");
+  ucicmd_append_arg(&cmd, "arg1");
+  ucicmd_append_arg(&cmd, "arg2");
+  ucicmd_append_arg(&cmd, "arg3");
+
+  if (strncmp(cmd.root, "root", MAX_TOKEN_SIZE) != 0) return false;
+  if (strncmp(ucicmd_get_arg(cmd, 0), "arg1", MAX_TOKEN_SIZE) != 0)
+    return false;
+  if (strncmp(ucicmd_get_arg(cmd, 1), "arg2", MAX_TOKEN_SIZE) != 0)
+    return false;
+  if (strncmp(ucicmd_get_arg(cmd, 2), "arg3", MAX_TOKEN_SIZE) != 0)
+    return false;
+  return true;
+}
+
+bool test_invalid_cmd_ucicmd() {
+  ucicmd cmd = ucicmd_init();
+  ucicmd_add(&cmd, "john");
+  ucicmd_add(&cmd, "debug");
+  ucicmd_add(&cmd, "on");
+
+  if (strncmp(cmd.root, "debug", MAX_TOKEN_SIZE) != 0) return false;
+  if (strncmp(ucicmd_get_arg(cmd, 0), "on", MAX_TOKEN_SIZE) != 0)
+    return false;
+  return true;
+}
+#endif
diff --git a/src/uci/command.h b/src/uci/command.h
new file mode 100644
index 0000000..ba9c51d
--- /dev/null
+++ b/src/uci/command.h
@@ -0,0 +1,21 @@
+#ifndef UCI_COMMAND_H
+#define UCI_COMMAND_H
+
+#define MAX_TOKEN_SIZE 32
+
+typedef struct {
+  char root[MAX_TOKEN_SIZE];
+  int args_count;
+  int args_capacity;
+  char* args;
+  bool empty;
+} ucicmd;
+
+ucicmd ucicmd_init();
+void ucicmd_add(ucicmd* cmd, const char* token);
+void ucicmd_set_root(ucicmd* cmd, const char* token);
+void ucicmd_append_arg(ucicmd* cmd, const char* token);
+char* ucicmd_get_arg(ucicmd cmd, int i);
+void ucicmd_deinit(ucicmd cmd);
+
+#endif // UCI_COMMAND_H
diff --git a/src/uci/draft-1.pdf b/src/uci/draft-1.pdf
new file mode 100644
index 0000000..9c68adb
--- /dev/null
+++ b/src/uci/draft-1.pdf
diff --git a/src/uci/draft-2.pdf b/src/uci/draft-2.pdf
new file mode 100644
index 0000000..d0d4707
--- /dev/null
+++ b/src/uci/draft-2.pdf
diff --git a/src/uci/response.c b/src/uci/response.c
new file mode 100644
index 0000000..b27bf76
--- /dev/null
+++ b/src/uci/response.c
@@ -0,0 +1,103 @@
+#include <string.h>
+#include <assert.h>
+#include "response.h"
+
+enum {
+  STATE_INITIAL,
+  STATE_IDLE,
+  STATE_SYNC,
+  STATE_PING,
+  STATE_ACTIVE,
+  STATE_HALT,
+};
+int current_state = STATE_INITIAL;
+int debug = false;
+
+void todo() {
+  assert(0);
+}
+
+void handle_uci(ucicmd cmd) {
+  if (current_state == STATE_INITIAL) {
+    return handle_initial(cmd);
+  }
+  if (current_state == STATE_IDLE) {
+    return handle_idle(cmd);
+  }
+  if (current_state == STATE_SYNC) {
+    return handle_sync(cmd);
+  }
+  if (current_state == STATE_PING) {
+    return handle_ping(cmd);
+  }
+  if (current_state == STATE_ACTIVE) {
+    return handle_active(cmd);
+  }
+  return handle_halt(cmd);
+}
+
+void handle_initial(ucicmd cmd) {
+  if (cmd.empty || strcmp(cmd.root, "uci") != 0) return;
+  printf("uciok\n");
+  current_state = STATE_IDLE;
+}
+
+void handle_idle(ucicmd cmd) {
+  if (cmd.empty) return;
+  if (strcmp(cmd.root, "debug") == 0) {
+    debug = strcmp(ucicmd_get_arg(cmd, 0), "on") == 0;
+  } else if (strcmp(cmd.root, "setoption") == 0) {
+  } else if (strcmp(cmd.root, "ucinewgame") == 0) {
+  } else if (strcmp(cmd.root, "position") == 0) {
+  } else if (strcmp(cmd.root, "stop") == 0) {
+  } else if (strcmp(cmd.root, "quit") == 0) {
+    free(cmd.args);
+    exit(0);
+  } else if (strcmp(cmd.root, "isready") == 0) {
+    current_state = STATE_SYNC;
+  } else if (strcmp(cmd.root, "go") == 0) {
+    current_state = STATE_ACTIVE;
+  } else {
+    printf("Invalid command: %s\n", cmd.root);
+  }
+}
+
+void handle_sync(ucicmd cmd) {
+  // when i come up with some info to give: 
+  // printf("info\n");
+  printf("readyok\n");
+  current_state = STATE_IDLE;
+}
+
+void handle_ping(ucicmd cmd) {
+  // when i come up with some info to give: 
+  // printf("info\n");
+  //
+  // if (TODO) {
+  //   printf("bestmove\n");
+  //   current_state = STATE_IDLE;
+  // }
+  printf("readyok\n");
+  current_state = STATE_ACTIVE;
+}
+
+void handle_active(ucicmd cmd) {
+  if (cmd.empty) {
+    return;
+  }
+  // TODO: this section will call the engine to analysis
+  if (strcmp(cmd.root, "isready") == 0) {
+    current_state = STATE_PING;
+  } else if (strcmp(cmd.root, "stop") == 0) {
+    current_state = STATE_HALT;
+  } else {
+    printf("Invalid command: %s\n", cmd.root);
+  }
+}
+
+void handle_halt(ucicmd cmd) {
+  // when i come up with some info to give: 
+  // printf("info\n");
+  printf("bestmove 0000\n"); // TODO: idk get it rn
+  current_state = STATE_IDLE;
+}
diff --git a/src/uci/response.h b/src/uci/response.h
new file mode 100644
index 0000000..09a0124
--- /dev/null
+++ b/src/uci/response.h
@@ -0,0 +1,9 @@
+#include "command.h"
+
+void handle_uci(ucicmd cmd);
+void handle_initial(ucicmd cmd);
+void handle_idle(ucicmd cmd);
+void handle_sync(ucicmd cmd);
+void handle_ping(ucicmd cmd);
+void handle_active(ucicmd cmd);
+void handle_halt(ucicmd cmd);
diff --git a/src/uci/uci_min.txt b/src/uci/uci_min.txt
new file mode 100644
index 0000000..58a85b6
--- /dev/null
+++ b/src/uci/uci_min.txt
@@ -0,0 +1,140 @@
+GUI to engine:
+* uci
+* debug [ on | off ]
+* isready
+* setoption name <id> [value <x>]
+	Here are some strings for the example below:
+	   "setoption name Nullmove value true\n"
+     "setoption name Selectivity value 3\n"
+	   "setoption name Style value Risky\n"
+	   "setoption name Clear Hash\n"
+	   "setoption name NalimovPath value c:\chess\tb\4;c:\chess\tb\5\n"
+
+* register
+	The following tokens are allowed:
+	* later
+	   the user doesn't want to register the engine now.
+	* name <x>
+	   the engine should be registered with the name <x>
+	* code <y>
+	   the engine should be registered with the code <y>
+	Example:
+	   "register later"
+	   "register name Stefan MK code 4359874324"
+
+* ucinewgame
+* position [fen <fenstring> | startpos ]  moves <move1> .... <movei>
+* go
+	* searchmoves <move1> .... <movei>
+		Example: After "position startpos" and "go infinite searchmoves e2e4 d2d4"
+		the engine should only search the two moves e2e4 and d2d4 in the initial position.
+	* ponder
+	* wtime <x>
+	* btime <x>
+	* winc <x>
+	* binc <x>
+	* movestogo <x>
+	* depth <x>
+	* nodes <x>
+	* mate <x>
+	* movetime <x>
+	* infinite
+* stop
+* ponderhit
+* quit
+
+
+Engine to GUI:
+* id
+	* name <x>
+		e.g. "id name Shredder X.Y\n"
+	* author <x>
+		e.g. "id author Stefan MK\n"
+* uciok
+* readyok
+* bestmove <move1> [ ponder <move2> ]
+* copyprotection
+* registration
+* info
+	e.g. "info currmove e2e4 currmovenumber 1" or
+	     "info depth 12 nodes 123456 nps 100000".
+	e.g. "info depth 2 score cp 214 time 1242 nodes 2124 nps 34928 pv e2e4 e7e5 g1f3"
+	Additional info:
+	* depth <x>
+	* seldepth <x>
+	* time <x>
+	* nodes <x>
+	* pv <move1> ... <movei>
+	* multipv <num>
+	* score
+		* cp <x>
+		* mate <y>
+		* lowerbound
+		* upperbound
+	* currmove <move>
+	* currmovenumber <x>
+	* hashfull <x>
+	* nps <x>
+	* tbhits <x>
+	* sbhits <x>
+	* cpuload <x>
+	* string <str>
+	* refutation <move1> <move2> ... <movei>
+	   Example: after move d1h5 is searched, the engine can send
+	   "info refutation d1h5 g6h5"
+	   if g6h5 is the best answer after d1h5 or if g6h5 refutes the move d1h5.
+	   if there is no refutation for d1h5 found, the engine should just send
+	   "info refutation d1h5"
+	* currline <cpunr> <move1> ... <movei>
+	
+
+* option
+	* name <id>
+		* <id> = Hash, type is spin
+		* <id> = NalimovPath, type string
+		* <id> = NalimovCache, type spin
+		* <id> = Ponder, type check
+		* <id> = OwnBook, type check
+		* <id> = MultiPV, type spin
+		* <id> = UCI_ShowCurrLine, type check, should be false by default,
+		* <id> = UCI_ShowRefutations, type check, should be false by default,
+		* <id> = UCI_LimitStrength, type check, should be false by default,
+		* <id> = UCI_Elo, type spin
+		* <id> = UCI_AnalyseMode, type check
+		 * <id> = UCI_Opponent, type string
+		   Examples:
+		   "setoption name UCI_Opponent value GM 2800 human Gary Kasparov"
+		   "setoption name UCI_Opponent value none none computer Shredder"
+		 * <id> = UCI_EngineAbout, type string
+		   Example:
+			"option name UCI_EngineAbout type string default Shredder by Stefan Meyer-Kahlen, see www.shredderchess.com"
+		* <id> = UCI_ShredderbasesPath, type string
+	   * <id> = UCI_SetPositionValue, type string
+	   		
+	* type <t>
+		* check
+			a checkbox that can either be true or false
+		* spin
+			a spin wheel that can be an integer in a certain range
+		* combo
+			a combo box that can have different predefined strings as a value
+		* button
+			a button that can be pressed to send a command to the engine
+		* string
+			a text field that has a string as a value,
+			an empty string has the value "<empty>"
+	* default <x>
+		the default value of this parameter is x
+	* min <x>
+		the minimum value of this parameter is x
+	* max <x>
+		the maximum value of this parameter is x
+	* var <x>
+		a predefined value of this parameter is x
+	Examples:
+    Here are 5 strings for each of the 5 possible types of options
+	   "option name Nullmove type check default true\n"
+      "option name Selectivity type spin default 2 min 0 max 4\n"
+	   "option name Style type combo default Normal var Solid var Normal var Risky\n"
+	   "option name NalimovPath type string default c:\\n"
+	   "option name Clear Hash type button\n"