diff --git a/src/server/game/mod/charge/Charge.go b/src/server/game/mod/charge/Charge.go
index 0e3d5155..538f4030 100644
--- a/src/server/game/mod/charge/Charge.go
+++ b/src/server/game/mod/charge/Charge.go
@@ -331,7 +331,7 @@ func (c *ChargeMod) InitChessShop(Emit []int) {
 				ChessLv := mergeDataCfg.GetLvById(c)
 				DynamicLv := mergeDataCfg.GetAdjust(v, p, 0)
 				ChessLv += DynamicLv
-				Diamond := math.Round(math.Pow(2, float64(ChessLv)) / 18)
+				Diamond := math.Round(math.Pow(2, float64(ChessLv-1)) / 18)
 				RandList = append(RandList, &Rand{ChessId: c, Diamond: int(Diamond)})
 			}
 		}