diff --git a/src/Board.cc b/src/Board.cc
index 4395a5c..11c4f31 100644
--- gmchess-0.29.6-r3/src/Board.cc
+++ gmchess-0.29.6-r3/src/Board.cc
@@ -297,12 +297,13 @@ void Board::on_map()
 
 bool Board::on_configure_event(GdkEventConfigure* ev)
 {
-	//if(ui_pixmap)
-	//	return true;
 	ui_pixmap = Gdk::Pixmap::create(this->get_window(),get_width(),get_height());
 
-	redraw();
-
+	if(ui_pixmap) {
+		redraw();
+		return true;
+	}
+	return false;
 }
 bool Board::on_expose_event(GdkEventExpose* ev)
 {
@@ -1146,7 +1147,7 @@ bool Board::robot_log(const Glib::IOCondition& condition)
 
 	if (buf_len > 0) {
 		*p = 0;
-		printf(buf);
+		printf("%s",buf);
 		std::string str_buf(buf);
 		parent.show_textview_engine_log(str_buf);
 
diff --git a/src/ConfWindow.cc b/src/ConfWindow.cc
index 1ff03c8..4aa61f2 100644
--- gmchess-0.29.6-r3/src/ConfWindow.cc
+++ gmchess-0.29.6-r3/src/ConfWindow.cc
@@ -117,7 +117,7 @@ void ConfWindow::on_button_color_set()
 bool ConfWindow::on_delete_event(GdkEventAny*)
 {
 	on_button_cancel();
-
+	return(true);
 }
 void ConfWindow::write_to_GMConf()
 {
diff --git a/src/Engine.cc b/src/Engine.cc
index d316c0e..050b01c 100644
--- gmchess-0.29.6-r3/src/Engine.cc
+++ gmchess-0.29.6-r3/src/Engine.cc
@@ -509,7 +509,7 @@ bool Engine::mate()
 				case RED_KNIGHT:
 				case BLACK_KNIGHT:
 					for(int k=0;k<8;k++){
-						dst=src+ KingMoveTab[k];
+						dst=src+ KnightMoveTab[k];
 						if(in_board(dst)){
 							int mv = get_move(src,dst);
 							if(make_move(mv)){
@@ -2098,7 +2098,7 @@ uint32_t Engine::hanzi_to_iccs(uint32_t f_hanzi)
 							n++;
 						}
 					}
-					DLOG(" n=%d\n");
+					DLOG(" n=%d\n", n);
 					/** 为纵线上的棋子排序*/
 					for(int k=start;k<n-1;k++)
 						for(int j=n-2;j>=k;j--){
diff --git a/src/MainWindow.cc b/src/MainWindow.cc
index 528680e..cbd5ff1 100644
--- gmchess-0.29.6-r3/src/MainWindow.cc
+++ gmchess-0.29.6-r3/src/MainWindow.cc
@@ -1176,6 +1176,7 @@ bool MainWindow::on_end_game(OVERSTATUS _over)
 			auto_save_chess_file();
 		board->free_game(false);
 		set_status();
+	return(true);
 }
 
 void MainWindow::set_red_war_time(const Glib::ustring& f_time,const Glib::ustring& c_time)
diff --git a/src/Sound.cc b/src/Sound.cc
index 517d126..5efd736 100644
--- gmchess-0.29.6-r3/src/Sound.cc
+++ gmchess-0.29.6-r3/src/Sound.cc
@@ -78,7 +78,7 @@ void CSound::play_file(const char* filename)
 {
 	gchar* argv[3];
 #ifdef __linux__
-	argv[0] = "aplay";
+	argv[0] = (gchar *)"aplay";
 #elif __APPLE__
 	argv[0] = "afplay";
 #endif
--- gmchess-0.29.6/src/engine/cchess.cpp
+++ gmchess-0.29.6/src/engine/cchess.cpp
@@ -690,7 +690,7 @@
     }
     lpSrc ++;
   };
-  while(lpSrc != '\0' && lpDst < lpDstLimit) {
+  while(lpSrc != NULL && lpDst < lpDstLimit) {
     *lpDst = *lpSrc;
     lpSrc ++;
     lpDst ++;