diff --git a/src/game/mouse/card_matching/game.js b/src/game/mouse/card_matching/game.js
index c12af47..a8fd262 100644
--- a/src/game/mouse/card_matching/game.js
+++ b/src/game/mouse/card_matching/game.js
@@ -327,46 +327,53 @@ var Game = {
 
 		var index = this.getCardIndex(col, row);
 
-		if(this.isCardSelectEdgeActivated() == false) {		// card select edge is not activated
+		if(this.isCardSelectEdgeActivated() == false		// card select edge is not activated
+		|| this.isSelectedBefore(col, row) == false) {		// not selected card
+
+			if(this.cards[index].isActivated == false)
+				return;
+
 			this.showSelectedCard(col, row);
-		} else {										// card select edge is activated
-			if(this.isSelectedBefore(col, row) == true) {
-				this.hideSelectedCard();
-
-				if(this.isFrontCard(col, row)) {
-					this.flipToBack(col, row);
-
-					if(this.isOpenedCard(col, row) == true) {
-						this.resetOpenCardInfo(col, row);
-					}
-				} else {
-					this.flipToFront(col, row);
-
-					if(this.isOpenedCard(col, row) == false) {
-						this.setOpenCardInfo(col, row);
-
-						if(this.isCardSelectEdgeAll() == true) {
-							if(this.isSameCharacterCard() == true) {
-								this.clearOpenedTwoCards();
-							} else {
-								this.resetOpenedTwoCards();
-							}
-						}
-					}
-				}
-			} else {
-				this.showSelectedCard(col, row);
-			}
-
+			this.setSelectedCard(col, row);
+			return;
 		}
 
-		// showOpenCardInfo();
+		this.hideSelectedCard();
 
+		// opened card -> flip to back
+		if(this.isFrontCard(col, row) == true) {
+			this.flipToBack(col, row);
+
+			if(this.isOpenedCard(col, row) == true)
+				this.resetOpenCardInfo(col, row);
+
+			this.setSelectedCard(col, row);
+			return;
+		}
+
+		// closed card -> flip to front
+		this.flipToFront(col, row);
+
+		if(this.isOpenedCard(col, row) == false) {
+			this.setOpenCardInfo(col, row);
+
+			if(this.isCardSelectEdgeAll() == true) {	// selected 2 cards
+				if(this.isSameCharacterCard() == true)		// selected same cards
+					this.clearOpenedTwoCards();
+				else										// selected different cards
+					this.resetOpenedTwoCards();
+			}
+		}
+
+		// this.showOpenCardInfo();
+		this.setSelectedCard(col, row);
+	},
+
+	setSelectedCard: function(col, row) {
 		this.selectedCardCol = col;
 		this.selectedCardRow = row;
 	},
 
-
 	isSelectedBefore: function(col, row) {
 		if(this.selectedCardCol == col && this.selectedCardRow == row)
 			return true;
@@ -417,7 +424,7 @@ var Game = {
 
 	showOpenCardInfo: function() {
 		console.log(
-			"card 1 (" + this.openCardInfoIndex[0] + ", : " + this.openCardInfoCharacter[0] + "), card 2 ("
+			"card 1 (" + this.openCardInfoIndex[0] + ", " + this.openCardInfoCharacter[0] + "), card 2 ("
 			 + this.openCardInfoIndex[1] + ", " + this.openCardInfoCharacter[1] + ")");
 	},
 
@@ -450,10 +457,12 @@ var Game = {
 		var card1 = this.cards[this.openCardInfoIndex[0]];
 		this.resetOpenCardInfo(card1.getColumnNo(), card1.getRowNo());
 		this.reservedHideCard[0] = card1;
+		card1.setActive(false);
 
 		var card2 = this.cards[this.openCardInfoIndex[1]];
 		this.resetOpenCardInfo(card2.getColumnNo(), card2.getRowNo());
 		this.reservedHideCard[1] = card2;
+		card2.setActive(false);
 
 		// to do : show card 2 (flip to front) and wait 1 sec
 		// to do : hide card 1, card 2