diff --git a/src/game/rule/operation/hand.go b/src/game/rule/operation/hand.go
index 223337e..16b9e35 100644
--- a/src/game/rule/operation/hand.go
+++ b/src/game/rule/operation/hand.go
@@ -5,7 +5,7 @@ import (
 	"sort"
 )
 
-func royalFlush(game *entity.Game, _ interface{}) int {
+func royalFlush(game *entity.Game, _ interface{}) uint64 {
 	hand := getHand(game)
 	if !hand.Flush() || !hand.Straight() {
 		return 0
@@ -18,7 +18,7 @@ func royalFlush(game *entity.Game, _ interface{}) int {
 	return 1
 }
 
-func straightFlush(game *entity.Game, _ interface{}) int {
+func straightFlush(game *entity.Game, _ interface{}) uint64 {
 	hand := getHand(game)
 	if !hand.Flush() || !hand.Straight() {
 		return 0
@@ -29,29 +29,14 @@ func straightFlush(game *entity.Game, _ interface{}) int {
 			biggest = card.Value
 		}
 	}
-	return biggest
+	return uint64(biggest)
 }
 
-func fourOfAKind(game *entity.Game, _ interface{}) int {
-	hand := getHand(game)
-	counts := counts(hand)
-	best := entity.Card{}
-	high := entity.Card{}
-	for k, v := range counts {
-		if v >= 4 && k.Value > best.Value {
-			best = k
-		}
-		if v != 4 && k.Value > high.Value {
-			high = k
-		}
-	}
-	if best.Value == 0 {
-		return 0
-	}
-	return best.Value*100 + high.Value
+func fourOfAKind(game *entity.Game, _ interface{}) uint64 {
+	return nOfAKind(game, 4)
 }
 
-func fullHouse(game *entity.Game, _ interface{}) int {
+func fullHouse(game *entity.Game, _ interface{}) uint64 {
 	hand := getHand(game)
 	counts := counts(hand)
 	trio := entity.Card{}
@@ -67,27 +52,18 @@ func fullHouse(game *entity.Game, _ interface{}) int {
 	if trio.Value == 0 || duo.Value == 0 {
 		return 0
 	}
-	return trio.Value*100 + duo.Value
+	return uint64(trio.Value*100 + duo.Value)
 }
 
-func flush(game *entity.Game, _ interface{}) int {
+func flush(game *entity.Game, _ interface{}) uint64 {
 	hand := getHand(game)
 	if !hand.Flush() {
 		return 0
 	}
-	values := make([]int, 0)
-	for _, card := range hand.AllCards() {
-		values = append(values, card.Value)
-	}
-	sort.Ints(values)
-	rank := 0
-	for i := len(values) - 1; i >= 0; i-- {
-		rank = rank*100 + values[i]
-	}
-	return rank
+	return highCard(game, nil)
 }
 
-func straight(game *entity.Game, _ interface{}) int {
+func straight(game *entity.Game, _ interface{}) uint64 {
 	hand := getHand(game)
 	if !hand.Straight() {
 		return 0
@@ -98,23 +74,76 @@ func straight(game *entity.Game, _ interface{}) int {
 			big = card.Value
 		}
 	}
-	return big
+	return uint64(big)
 }
 
-func threeOfAKind(game *entity.Game, _ interface{}) int {
-	panic("not impl")
+func threeOfAKind(game *entity.Game, _ interface{}) uint64 {
+	return nOfAKind(game, 3)
 }
 
-func twoPair(game *entity.Game, _ interface{}) int {
-	panic("not impl")
+func twoPair(game *entity.Game, _ interface{}) uint64 {
+	high := nOfAKind(game, 2)
+	if high == 0 {
+		return 0
+	}
+	high = high / 100
+	hand := getHand(game)
+	counts := counts(hand)
+	low := 0
+	highCard := 0
+	for k, v := range counts {
+		if ((uint64(k.Value) != high && v >= 2) || v >= 4) && k.Value > low {
+			low = k.Value
+		}
+	}
+	if low == 0 {
+		return 0
+	}
+	for k, v := range counts {
+		if ((uint64(k.Value) != high && k.Value != low) || v > 4 || v == 3) && k.Value > highCard {
+			highCard = k.Value
+		}
+	}
+	return high*100*100 + uint64(low*100+highCard)
 }
 
-func pair(game *entity.Game, _ interface{}) int {
-	panic("not impl")
+func pair(game *entity.Game, _ interface{}) uint64 {
+	return nOfAKind(game, 2)
 }
 
-func highCard(game *entity.Game, _ interface{}) int {
-	panic("not impl")
+func nOfAKind(game *entity.Game, n int) uint64 {
+	hand := getHand(game)
+	counts := counts(hand)
+	best := entity.Card{}
+	high := entity.Card{}
+	for i := 0; i < 2; i++ {
+		for k, v := range counts {
+			if v >= n && k.Value > best.Value {
+				best = k
+			}
+			if (v != n || k.Value != best.Value) && k.Value > high.Value {
+				high = k
+			}
+		}
+	}
+	if best.Value == 0 {
+		return 0
+	}
+	return uint64(best.Value*100 + high.Value)
+}
+
+func highCard(game *entity.Game, _ interface{}) uint64 {
+	hand := getHand(game)
+	values := make([]int, 0)
+	for _, card := range hand.AllCards() {
+		values = append(values, card.Value)
+	}
+	sort.Ints(values)
+	value := uint64(0)
+	for i := len(values) - 1; i >= 0; i-- {
+		value = value*100 + uint64(values[i])
+	}
+	return value
 }
 
 func getHand(game *entity.Game) entity.Hand {
diff --git a/src/game/rule/operation/hand_test.go b/src/game/rule/operation/hand_test.go
index 60d8212..e003920 100644
--- a/src/game/rule/operation/hand_test.go
+++ b/src/game/rule/operation/hand_test.go
@@ -102,6 +102,123 @@ func TestFlush(t *testing.T) {
 	}
 }
 
+func TestHighCard(t *testing.T) {
+	cases := map[string]testHandCase{
+		"no cards": {
+			want: 0,
+		},
+		"seven card": {
+			public: []entity.Card{
+				entity.Card{Value: 13},
+				entity.Card{Value: 11},
+				entity.Card{Value: 11},
+				entity.Card{Value: 11},
+				entity.Card{Value: 11},
+				entity.Card{Value: 3},
+				entity.Card{Value: 4},
+			},
+			want: 13111111110403,
+		},
+		"four card": {
+			public: []entity.Card{
+				entity.Card{Value: 13},
+				entity.Card{Value: 11},
+				entity.Card{Value: 3},
+				entity.Card{Value: 4},
+			},
+			want: 13110403,
+		},
+		"three card": {
+			public: []entity.Card{
+				entity.Card{Value: 13},
+				entity.Card{Value: 3},
+				entity.Card{Value: 4},
+			},
+			want: 130403,
+		},
+		"two card": {
+			public: []entity.Card{
+				entity.Card{Value: 3},
+				entity.Card{Value: 4},
+			},
+			want: 403,
+		},
+		"one card": {
+			public: []entity.Card{
+				entity.Card{Value: 3},
+			},
+			want: 3,
+		},
+	}
+
+	for name, d := range cases {
+		testHand(t, name, highCard, d.public, d.private, d.want)
+	}
+}
+
+func TestTwoPair(t *testing.T) {
+	cases := map[string]testHandCase{
+		"no cards": {
+			want: 0,
+		},
+		"no pair": {
+			public: []entity.Card{
+				entity.Card{Value: 11},
+				entity.Card{Value: 10},
+			},
+			want: 0,
+		},
+		"one pair": {
+			public: []entity.Card{
+				entity.Card{Value: 11},
+				entity.Card{Value: 11},
+			},
+			want: 0,
+		},
+		"no second pair": {
+			public: []entity.Card{
+				entity.Card{Value: 12},
+				entity.Card{Value: 12},
+				entity.Card{Value: 11},
+				entity.Card{Value: 10},
+			},
+			want: 0,
+		},
+		"two pair diff": {
+			public: []entity.Card{
+				entity.Card{Value: 11},
+				entity.Card{Value: 11},
+				entity.Card{Value: 10},
+				entity.Card{Value: 10},
+			},
+			want: 111000,
+		},
+		"two pair same": {
+			public: []entity.Card{
+				entity.Card{Value: 11},
+				entity.Card{Value: 11},
+				entity.Card{Value: 11},
+				entity.Card{Value: 11},
+			},
+			want: 111100,
+		},
+		"two pair high": {
+			public: []entity.Card{
+				entity.Card{Value: 11},
+				entity.Card{Value: 11},
+				entity.Card{Value: 10},
+				entity.Card{Value: 10},
+				entity.Card{Value: 13},
+			},
+			want: 111013,
+		},
+	}
+
+	for name, d := range cases {
+		testHand(t, name, twoPair, d.public, d.private, d.want)
+	}
+}
+
 func TestFullHouse(t *testing.T) {
 	cases := map[string]testHandCase{
 		"no cards": {
@@ -144,8 +261,8 @@ func TestFullHouse(t *testing.T) {
 	}
 }
 
-func TestFourOfAKind(t *testing.T) {
-	cases := map[string]testHandCase{
+func TestNOfAKind(t *testing.T) {
+	cases4 := map[string]testHandCase{
 		"no cards": {
 			want: 0,
 		},
@@ -191,9 +308,118 @@ func TestFourOfAKind(t *testing.T) {
 		},
 	}
 
-	for name, d := range cases {
+	for name, d := range cases4 {
 		testHand(t, name, fourOfAKind, d.public, d.private, d.want)
 	}
+
+	cases2 := map[string]testHandCase{
+		"no cards": {
+			want: 0,
+		},
+		"one card": {
+			public: []entity.Card{
+				entity.Card{Value: 5},
+			},
+			want: 0,
+		},
+		"two cards": {
+			public: []entity.Card{
+				entity.Card{Value: 5},
+				entity.Card{Value: 5},
+			},
+			want: 500,
+		},
+		"three cards": {
+			public: []entity.Card{
+				entity.Card{Value: 5},
+				entity.Card{Value: 5},
+				entity.Card{Value: 5},
+			},
+			want: 505,
+		},
+		"four cards, two diff pairs": {
+			public: []entity.Card{
+				entity.Card{Value: 4},
+				entity.Card{Value: 4},
+				entity.Card{Value: 5},
+				entity.Card{Value: 5},
+			},
+			want: 504,
+		},
+		"four cards": {
+			public: []entity.Card{
+				entity.Card{Value: 5},
+				entity.Card{Value: 5},
+				entity.Card{Value: 5},
+				entity.Card{Value: 5},
+			},
+			want: 505,
+		},
+		"five cards": {
+			public: []entity.Card{
+				entity.Card{Value: 5},
+				entity.Card{Value: 5},
+				entity.Card{Value: 5},
+				entity.Card{Value: 5},
+				entity.Card{Value: 5},
+			},
+			want: 505,
+		},
+	}
+
+	for name, d := range cases2 {
+		testHand(t, name, pair, d.public, d.private, d.want)
+	}
+
+	cases3 := map[string]testHandCase{
+		"no cards": {
+			want: 0,
+		},
+		"one card": {
+			public: []entity.Card{
+				entity.Card{Value: 5},
+			},
+			want: 0,
+		},
+		"two cards": {
+			public: []entity.Card{
+				entity.Card{Value: 5},
+				entity.Card{Value: 5},
+			},
+			want: 0,
+		},
+		"three cards": {
+			public: []entity.Card{
+				entity.Card{Value: 5},
+				entity.Card{Value: 5},
+				entity.Card{Value: 5},
+			},
+			want: 500,
+		},
+		"four cards": {
+			public: []entity.Card{
+				entity.Card{Value: 5},
+				entity.Card{Value: 5},
+				entity.Card{Value: 5},
+				entity.Card{Value: 5},
+			},
+			want: 505,
+		},
+		"five cards": {
+			public: []entity.Card{
+				entity.Card{Value: 5},
+				entity.Card{Value: 5},
+				entity.Card{Value: 5},
+				entity.Card{Value: 5},
+				entity.Card{Value: 5},
+			},
+			want: 505,
+		},
+	}
+
+	for name, d := range cases3 {
+		testHand(t, name, threeOfAKind, d.public, d.private, d.want)
+	}
 }
 
 func TestStraightFlush(t *testing.T) {
@@ -272,7 +498,7 @@ func testHand(t *testing.T, name string, foo Int, public []entity.Card, private
 			},
 		}
 		got := foo(game, nil)
-		if got != want {
+		if got != uint64(want) {
 			t.Fatal(want, got)
 		}
 	})
diff --git a/src/game/rule/operation/int.go b/src/game/rule/operation/int.go
index 99e20aa..77b3014 100644
--- a/src/game/rule/operation/int.go
+++ b/src/game/rule/operation/int.go
@@ -6,7 +6,7 @@ import (
 	"local/sandbox/cards/src/entity"
 )
 
-type Int func(*entity.Game, interface{}) int
+type Int func(*entity.Game, interface{}) uint64
 
 var intStringified = map[string]Int{
 	"royalFlush":    royalFlush,
diff --git a/src/game/rule/operation/operation_test.go b/src/game/rule/operation/operation_test.go
index 5ecad98..159123c 100644
--- a/src/game/rule/operation/operation_test.go
+++ b/src/game/rule/operation/operation_test.go
@@ -6,7 +6,7 @@ import (
 )
 
 func TestOperationInterface(t *testing.T) {
-	foo := func(*entity.Game, interface{}) int { return 0 }
+	foo := func(*entity.Game, interface{}) uint64 { return 0 }
 	var _ Int = foo
 	bar := func(*entity.Game, interface{}) bool { return false }
 	var _ Bool = bar