Create basic, rule-based solver

main.c

@@ -16,6 +16,7 @@
  * <https://www.gnu.org/licenses/>.
  */
 
+#include "solve.h"
 #include "sud.h"
 
 #include <stdint.h>
@@ -45,7 +46,17 @@ int main(void)
 
 	struct sudoku sud;
 	gen(&sud);
+	puts("Start:");
 	print(&sud);
+	putchar('\n');
+
+	bool res = solve(&sud);
+	if (!res) {
+		puts("Solver encountered an error\n");
+	} else {
+		puts("End:");
+		print(&sud);
+	}
 
 	return 0;
 }