////
//// Prototypes
////
+class Position;
extern void init_search();
extern void init_threads();
extern void exit_threads();
-extern int perft(Position& pos, Depth depth);
+extern int64_t perft(Position& pos, Depth depth);
extern bool think(Position& pos, bool infinite, bool ponder, int time[], int increment[],
int movesToGo, int maxDepth, int maxNodes, int maxTime, Move searchMoves[]);