-extern int Bioskey();
-
-////
-//// Debug
-////
-extern long dbg_cnt0;
-extern long dbg_cnt1;
-
-inline void dbg_hit_on(bool b) { dbg_cnt0++; if (b) dbg_cnt1++; }
-inline void dbg_hit_on_c(bool c, bool b) { if (c) dbg_hit_on(b); }
-
-inline void dbg_before() { dbg_cnt0++; }
-inline void dbg_after() { dbg_cnt1++; }
-
-inline void dbg_mean_of(int v) { dbg_cnt0++; dbg_cnt1 += v; }
-
-extern void dbg_print_hit_rate();
-extern void dbg_print_mean();
-
-extern bool dbg_show_mean;
-extern bool dbg_show_hit_rate;
+extern void timed_wait(WaitCondition*, Lock*, int);
+extern void prefetch(char* addr);
+
+extern void dbg_hit_on(bool b);
+extern void dbg_hit_on_c(bool c, bool b);
+extern void dbg_mean_of(int v);
+extern void dbg_print();
+
+class Position;
+extern Move move_from_uci(const Position& pos, const std::string& str);
+extern const std::string move_to_uci(Move m, bool chess960);
+extern const std::string move_to_san(Position& pos, Move m);
+
+struct Log : public std::ofstream {
+ Log(const std::string& f = "log.txt") : std::ofstream(f.c_str(), std::ios::out | std::ios::app) {}
+ ~Log() { if (is_open()) close(); }
+};