diff --git a/ngochess/gtp/gtp.go b/ngochess/gtp/gtp.go
index 55000b9..4e9591a 100644
--- a/ngochess/gtp/gtp.go
+++ b/ngochess/gtp/gtp.go
@@ -327,12 +327,13 @@ func (e *GtpEngine) SetFreeHandicap(vexArr ...string) bool {
 // Sync 同步
 // handicaps: points of all handicaps
 // plays: [][2]string -> [["B","A1"]]
-func (e *GtpEngine) Sync(size int, komi float64, handicaps []string, plays [][]string) bool {
+func (e *GtpEngine) Sync(size int, komi float64, level int, handicaps []string, plays [][]string) bool {
 	// 1. komi
 	// 2. boardsize
-	// 3. clear_board
-	// 4. set_free_handicap pos1 pos2 ...
-	// 5~n. play X XX
+	// 3. set_level
+	// 4. clear_board
+	// 5. set_free_handicap pos1 pos2 ...
+	// 6~n. play X XX
 
 	playAllFn := func() bool {
 		return narr.Every(plays, func(_ int, v []string) bool {
@@ -346,6 +347,7 @@ func (e *GtpEngine) Sync(size int, komi float64, handicaps []string, plays [][]s
 
 	return e.Komi(komi) &&
 		e.BoardSize(size) &&
+		e.SetLevel(level) &&
 		e.ClearBoard() &&
 		e.SetFreeHandicap(handicaps...) &&
 		playAllFn()