diff --git a/src/entity/curernt.go b/src/entity/curernt.go
new file mode 100644
index 0000000..67aac6a
--- /dev/null
+++ b/src/entity/curernt.go
@@ -0,0 +1,6 @@
+package entity
+
+type Current struct {
+	Bet  Currency
+	Turn int
+}
diff --git a/src/entity/deck.go b/src/entity/deck.go
new file mode 100644
index 0000000..24b9108
--- /dev/null
+++ b/src/entity/deck.go
@@ -0,0 +1,49 @@
+package entity
+
+import "math/rand"
+
+type Deck struct {
+	Deck    []Card
+	Discard []Card
+}
+
+func (d *Deck) Shuffle() {
+	shuffle(d.Deck)
+}
+
+func (d *Deck) Draw() Card {
+	if len(d.Deck) == 0 {
+		d.ShuffleInDiscard()
+	}
+	if len(d.Deck) == 0 {
+		panic("cannot draw from an empty deck")
+	}
+	card := d.Deck[len(d.Deck)-1]
+	d.Deck = d.Deck[:len(d.Deck)-1]
+	return card
+}
+
+func (d *Deck) ShuffleInDiscard() {
+	if len(d.Discard) == 0 {
+		return
+	}
+	for i := range d.Discard {
+		d.Deck = append(d.Deck, d.Discard[i])
+	}
+	d.Discard = d.Discard[:0]
+	shuffle(d.Deck)
+}
+
+func shuffle(cards []Card) {
+	if len(cards) == 0 {
+		return
+	}
+	switches := rand.Intn(100) + 100
+	for i := 0; i < switches; i++ {
+		a := rand.Intn(len(cards))
+		b := rand.Intn(len(cards))
+		j := cards[a]
+		cards[a] = cards[b]
+		cards[b] = j
+	}
+}
diff --git a/src/entity/game.go b/src/entity/game.go
index a659381..465945c 100644
--- a/src/entity/game.go
+++ b/src/entity/game.go
@@ -3,12 +3,91 @@ package entity
 import "fmt"
 
 type Game struct {
-	Pot     Currency
-	Turn    int
 	Players Players
 	Log     string
+	Deck    Deck
+	Current Current
 }
 
 func (game Game) Equals(gameB Game) bool {
 	return fmt.Sprint(game) != fmt.Sprint(gameB)
 }
+
+func (game Game) Pot() Currency {
+	var pot Currency
+	for _, player := range game.Players {
+		pot += player.Pot
+		pot += player.Bet
+	}
+	return pot
+}
+
+func (game Game) ActivePlayers() []*Player {
+	players := make([]*Player, 0)
+	for i := range game.Players {
+		if game.Players[i].Active {
+			players = append(players, &game.Players[i])
+		}
+	}
+	return players
+}
+
+func (game *Game) NextTurn() {
+	if len(game.ActivePlayers()) < 2 {
+		return
+	}
+	foo := func() {
+		game.Current.Turn = (game.Current.Turn + 1) % len(game.Players)
+	}
+	foo()
+	for !game.Players[game.Current.Turn].Active {
+		foo()
+	}
+}
+
+func (game *Game) NextPhase() {
+	for i := range game.Players {
+		game.Players[i].Checked = false
+		game.Players[i].Pot += game.Players[i].Bet
+		game.Players[i].Bet = 0
+	}
+	game.Current.Bet = 0
+}
+
+func (game *Game) ChargeActivePlayers(v Currency) {
+	for _, player := range game.ActivePlayers() {
+		if player.Balance < v {
+			player.Active = false
+		} else {
+			player.Balance -= v
+			player.Pot += v
+		}
+	}
+}
+
+func (game *Game) Deal(n int) {
+	for i := range game.Players {
+		if game.Players[i].Active {
+			for j := 0; j < n; j++ {
+				card := game.Deck.Draw()
+				game.Players[i].Hand.Push(card)
+			}
+		}
+	}
+}
+
+func (game Game) IsPotRight() bool {
+	potsRight := true
+	for _, player := range game.ActivePlayers() {
+		potsRight = potsRight && (player.Balance == 0 || player.Bet == game.Current.Bet)
+	}
+	return potsRight
+}
+
+func (game Game) IsAllActivePlayersChecked() bool {
+	allChecks := true
+	for _, player := range game.ActivePlayers() {
+		allChecks = allChecks && player.Checked
+	}
+	return allChecks
+}
diff --git a/src/entity/hand.go b/src/entity/hand.go
new file mode 100644
index 0000000..4dbc8ba
--- /dev/null
+++ b/src/entity/hand.go
@@ -0,0 +1,17 @@
+package entity
+
+type Hand struct {
+	Public  []Card
+	Private []Card
+}
+
+func (hand *Hand) Push(card Card) {
+	if hand.Public == nil {
+		hand.Public = make([]Card, 0, 1)
+	}
+	hand.Public = append(hand.Public, card)
+}
+
+func (hand Hand) Len() int {
+	return len(hand.Public) + len(hand.Private)
+}
diff --git a/src/entity/player.go b/src/entity/player.go
index ae916af..e721890 100644
--- a/src/entity/player.go
+++ b/src/entity/player.go
@@ -3,13 +3,10 @@ package entity
 type Player struct {
 	ID      string
 	Name    string
-	Card    Card
+	Hand    Hand
 	Balance Currency
 	Pot     Currency
+	Bet     Currency
 	Active  bool
 	Checked bool
 }
-
-func (p Player) Empty() bool {
-	return p == (Player{})
-}
diff --git a/src/entity/player_test.go b/src/entity/player_test.go
deleted file mode 100644
index 04e2547..0000000
--- a/src/entity/player_test.go
+++ /dev/null
@@ -1,16 +0,0 @@
-package entity
-
-import (
-	"testing"
-)
-
-func TestPlayerEmpty(t *testing.T) {
-	var p Player
-	if !p.Empty() {
-		t.Fatal(p)
-	}
-	p.ID = "id"
-	if p.Empty() {
-		t.Fatal(p)
-	}
-}
diff --git a/src/game/rule/end.go b/src/game/rule/end.go
new file mode 100644
index 0000000..7644ef7
--- /dev/null
+++ b/src/game/rule/end.go
@@ -0,0 +1,5 @@
+package rule
+
+import "local/sandbox/cards/src/game/rule/operation"
+
+type End operation.Bool
diff --git a/src/game/rule/hand.go b/src/game/rule/hand.go
new file mode 100644
index 0000000..b4eddc2
--- /dev/null
+++ b/src/game/rule/hand.go
@@ -0,0 +1,5 @@
+package rule
+
+import "local/sandbox/cards/src/game/rule/operation"
+
+type Hand operation.Int
diff --git a/src/game/rule/phase.go b/src/game/rule/phase.go
new file mode 100644
index 0000000..367f362
--- /dev/null
+++ b/src/game/rule/phase.go
@@ -0,0 +1,5 @@
+package rule
+
+import "local/sandbox/cards/src/game/rule/operation"
+
+type Phase operation.Bool
diff --git a/src/game/rule/rule.go b/src/game/rule/rule.go
new file mode 100644
index 0000000..2bf390c
--- /dev/null
+++ b/src/game/rule/rule.go
@@ -0,0 +1,7 @@
+package rule
+
+type Rule struct {
+	Ends   []End
+	Phases []Phase
+	Hands  []Hand
+}
diff --git a/src/game/storage_test.go b/src/game/storage_test.go
index 8028c06..4705ad6 100644
--- a/src/game/storage_test.go
+++ b/src/game/storage_test.go
@@ -45,9 +45,9 @@ func TestMasterUpdate(t *testing.T) {
 	}
 
 	game.Players.Add(entity.Player{
-		ID: "hi",
+		ID:  "hi",
+		Pot: 123,
 	})
-	game.Pot = 123
 	err = gm.ReplaceGame(id, game)
 	if err != nil {
 		t.Fatal(err)