diff --git a/src/entity/hand.go b/src/entity/hand.go
index c59e759..a54adad 100644
--- a/src/entity/hand.go
+++ b/src/entity/hand.go
@@ -5,8 +5,10 @@ import (
 )
 
 type Hand struct {
-	Public  []Card
-	Private []Card
+	Public         []Card
+	Private        []Card
+	ReversePublic  []Card
+	ReversePrivate []Card
 }
 
 func (hand *Hand) Push(card Card) {
@@ -17,12 +19,12 @@ func (hand *Hand) Push(card Card) {
 }
 
 func (hand Hand) Len() int {
-	return len(hand.Public) + len(hand.Private)
+	return len(hand.Public) + len(hand.Private) + len(hand.ReversePublic) + len(hand.ReversePrivate)
 }
 
 func (hand Hand) AllCards() []Card {
-	allcards := make([]Card, 0, len(hand.Public)+len(hand.Private))
-	for _, cards := range [][]Card{hand.Public, hand.Private} {
+	allcards := make([]Card, 0, hand.Len())
+	for _, cards := range [][]Card{hand.Public, hand.Private, hand.ReversePublic, hand.ReversePrivate} {
 		allcards = append(allcards, cards...)
 	}
 	return allcards
diff --git a/src/game/rule/operation/cards.go b/src/game/rule/operation/cards.go
index fad4bf1..f0c818f 100644
--- a/src/game/rule/operation/cards.go
+++ b/src/game/rule/operation/cards.go
@@ -1,17 +1,23 @@
 package operation
 
-import "local/sandbox/cards/src/entity"
+import (
+	"local/sandbox/cards/src/entity"
+)
 
 type Cards struct {
 	AceLow       bool
+	Jokers       int
 	WithoutValue []Value
 	WithoutSuit  []Suit
 }
 
 func (cards Cards) NewDeck() entity.Deck {
-	deck := new54DeckAceHigh()
+	deck := new52DeckAceHigh()
 	if cards.AceLow {
-		deck = new54DeckAceLow()
+		deck = new52DeckAceLow()
+	}
+	for i := 0; i < cards.Jokers; i++ {
+		deck.Deck = append(deck.Deck, entity.Card{Value: int(Joker)})
 	}
 	for i := len(deck.Deck) - 1; i >= 0; i-- {
 		card := deck.Deck[i]
@@ -26,11 +32,12 @@ func (cards Cards) NewDeck() entity.Deck {
 			deck.Deck = append(deck.Deck[:i], deck.Deck[i+1:]...)
 		}
 	}
+	deck.Shuffle()
 	return deck
 }
 
-func new54DeckAceHigh() entity.Deck {
-	cards := make([]entity.Card, 0, 54)
+func new52DeckAceHigh() entity.Deck {
+	cards := make([]entity.Card, 0, 52)
 	for _, suit := range suitStrings {
 		for _, value := range valueStrings {
 			if value != AceLow && value != Joker {
@@ -38,15 +45,13 @@ func new54DeckAceHigh() entity.Deck {
 			}
 		}
 	}
-	cards = append(cards, entity.Card{Value: int(Joker)})
-	cards = append(cards, entity.Card{Value: int(Joker)})
 	deck := entity.Deck{Deck: cards}
 	deck.Shuffle()
 	return deck
 }
 
-func new54DeckAceLow() entity.Deck {
-	deck := new54DeckAceHigh()
+func new52DeckAceLow() entity.Deck {
+	deck := new52DeckAceHigh()
 	for i, card := range deck.Deck {
 		if card.Value == int(AceHigh) {
 			deck.Deck[i].Value = int(AceLow)
diff --git a/src/game/rule/operation/cards_test.go b/src/game/rule/operation/cards_test.go
index 7c75cef..266210c 100644
--- a/src/game/rule/operation/cards_test.go
+++ b/src/game/rule/operation/cards_test.go
@@ -1,10 +1,13 @@
 package operation
 
-import "testing"
+import (
+	"local/sandbox/cards/src/entity"
+	"testing"
+)
 
-func TestNewDeck54(t *testing.T) {
-	deck := new54DeckAceLow()
-	if len(deck.Deck) != 54 {
+func TestNewDeck52(t *testing.T) {
+	deck := new52DeckAceLow()
+	if len(deck.Deck) != 52 {
 		t.Fatal(len(deck.Deck))
 	}
 	for _, card := range deck.Deck {
@@ -17,13 +20,48 @@ func TestNewDeck54(t *testing.T) {
 func TestCardsNewDeck(t *testing.T) {
 	cases := map[string]struct {
 		cards Cards
-		check func(Cards) bool
-	}{}
+		check func(entity.Deck) bool
+	}{
+		"default": {
+			cards: Cards{},
+			check: func(deck entity.Deck) bool {
+				return len(deck.Deck) == 52
+			},
+		},
+		"two jokers": {
+			cards: Cards{
+				Jokers: 2,
+			},
+			check: func(deck entity.Deck) bool {
+				return len(deck.Deck) == 54
+			},
+		},
+		"no fours": {
+			cards: Cards{
+				WithoutValue: []Value{Four},
+			},
+			check: func(deck entity.Deck) bool {
+				return len(deck.Deck) == 48
+			},
+		},
+		"no hearts, no clubs, one joker": {
+			cards: Cards{
+				Jokers:      1,
+				WithoutSuit: []Suit{Heart, Club},
+			},
+			check: func(deck entity.Deck) bool {
+				return len(deck.Deck) == 27
+			},
+		},
+	}
 
-	t.Fatal("not impl")
 	for name, d := range cases {
 		c := d
 		t.Run(name, func(t *testing.T) {
+			deck := c.cards.NewDeck()
+			if !c.check(deck) {
+				t.Fatal(deck)
+			}
 		})
 	}
 }