diff --git a/engine/include/bitboard.h b/engine/include/bitboard.h
index acd9318..1a9aab1 100644
--- a/engine/include/bitboard.h
+++ b/engine/include/bitboard.h
@@ -114,4 +114,7 @@ void gen_white_pawn_captures(const struct Board *board, struct Move *moves, int
 void gen_black_pawn_captures(const struct Board *board, struct Move *moves, int *count);
 void gen_white_pawn_capture_promotions(const struct Board *board, struct Move *moves, int *count);
 void gen_black_pawn_capture_promotions(const struct Board *board, struct Move *moves, int *count);
-int gen_pseudo_moves(const struct Board *board, struct Move *out, bool captures_only);
\ No newline at end of file
+int gen_pseudo_moves(const struct Board *board, struct Move *out, bool captures_only);
+int get_legal_moves(struct Board *board, struct Move *out);
+bool in_check(const struct Board *board, enum Color side);
+bool apply_move_on_copy(struct Board *in, struct Board *out, struct Move m);
\ No newline at end of file
diff --git a/engine/src/ai/negamax.c b/engine/src/ai/negamax.c
index de45e25..87fbe99 100644
--- a/engine/src/ai/negamax.c
+++ b/engine/src/ai/negamax.c
@@ -112,12 +112,4 @@ int ai_find_best_move_with_window(struct Board *board, int depth, int window_cp,
     int pick = cand_idx[rand_uniform(cand_n)];
     *best_out = moves[pick];
     return 1;
-}
-
-int ai_play(struct Board *b, int depth) {
-    struct Move m;
-    struct Board after;
-    if (!apply_move_on_copy(b, &after, m)) return 0;
-    *b = after;
-    return 1;
 }
\ No newline at end of file