diff --git a/main.c b/main.c
new file mode 100644
index 0000000..7f4a1a3
--- /dev/null
+++ b/main.c
@@ -0,0 +1,36 @@
+#include <stdio.h>
+#include <string.h>
+
+#define BUFF_SIZE 4096
+
+int main() {
+  setbuf(stdin, NULL);
+  setbuf(stdout, NULL);
+
+  char line[BUFF_SIZE];
+  char *lineRest, *token;
+  char ltz[] = "abcdefgh";
+  int cnt = 0;
+  while (1) {
+    (void)fgets(line, sizeof(line), stdin);
+    size_t len = strlen(line);
+    if (len - 1)
+      line[len - 1] = '\0';
+    token = strtok_r(line, " ", &lineRest);
+    if (!strcmp("uci", token)) {
+      printf("id name RatChess 0.0\n");
+      printf("id author rat<3\n\n");
+      printf("uciok\n");
+    } else if (!strcmp("quit", token)) {
+      return 0;
+    } else if (!strcmp("setoption", token)) {
+    } else if (!strcmp("position", token)) {
+    } else if (!strcmp("ucinewgame", token)) {
+    } else if (!strcmp("isready", token)) {
+      printf("readyok\n");
+    } else if (!strcmp("go", token)) {
+      printf("bestmove %c2%c4\n", ltz[cnt], ltz[cnt]);
+      cnt++;
+    }
+  }
+}
diff --git a/shell.nix b/shell.nix
new file mode 100644
index 0000000..b961719
--- /dev/null
+++ b/shell.nix
@@ -0,0 +1,13 @@
+{pkgs ? import <nixpkgs> {}}:
+with pkgs;
+  mkShell rec {
+    packages = [gdb clang-tools];
+    nativeBuildInputs = [
+      pkg-config
+      gcc
+      gnumake
+    ];
+    buildInputs = [
+    ];
+    LD_LIBRARY_PATH = lib.makeLibraryPath buildInputs;
+  }