diff --git a/README.md b/README.md
index 7e878ff1a..7f3bbcb64 100644
--- a/README.md
+++ b/README.md
@@ -30,3 +30,16 @@
 ### 요구사항 쪼개기
 - CellFinder
   - Cell을 입력받을 경우 해당 셀을 제외한 주변 8개 사각형에 포함된 지뢰의 개수를 반환한다.
+
+- Position
+  - Position은 주변 8개의 좌표를 담은 위치들을 반환한다.
+
+## 3단계 - 지뢰 찾기(게임 실행)
+
+### 기능 요구사항
+- 지뢰가 없는 인접한 칸이 모두 열리게 된다.
+
+### 요구사항 쪼개기
+- MineSweeperGame
+  - Open을 하면 해당 좌표에 인접한 칸 중 지뢰가 없는 칸이 모두 Open 상태로 바뀐다.
+  - Open 상태이면 주변 지뢰의 개수를 출력한다.
diff --git a/src/main/kotlin/minesweeper/MineSweeperApplication.kt b/src/main/kotlin/minesweeper/MineSweeperApplication.kt
index 70adab5a3..c44a417b4 100644
--- a/src/main/kotlin/minesweeper/MineSweeperApplication.kt
+++ b/src/main/kotlin/minesweeper/MineSweeperApplication.kt
@@ -1,7 +1,11 @@
 package minesweeper
 
 import minesweeper.domain.CellFinder
+import minesweeper.domain.HeightAndWidth
+import minesweeper.domain.MineSweeperGame
+import minesweeper.domain.Position
 import minesweeper.domain.RandomPositionGenerator
+import minesweeper.domain.Size
 import minesweeper.ui.InputType
 import minesweeper.ui.InputView
 import minesweeper.ui.ResultView
@@ -9,11 +13,35 @@ import minesweeper.ui.ResultView
 fun main() {
     val height = InputView.inputSize(InputType.HEIGHT)
     val width = InputView.inputSize(InputType.WIDTH)
-    val count = InputView.inputSize(InputType.COUNT)
+    val mineCount = InputView.inputSize(InputType.COUNT)
 
-    val minePositions = RandomPositionGenerator(height, width).generate(count)
+    val minePositions = RandomPositionGenerator(height, width).generate(mineCount)
     val cellFinder = CellFinder.init(height, width)
     cellFinder.convert(minePositions)
 
-    ResultView.printMines(height, width, cellFinder)
+    val mineSweeperGame = MineSweeperGame(cellFinder)
+    play(mineSweeperGame, HeightAndWidth(height, width), mineCount)
+}
+
+private fun play(mineSweeperGame: MineSweeperGame, heightAndWidth: HeightAndWidth, mineCount: Size) {
+    ResultView.printGameStartMessage()
+    while (!mineSweeperGame.isFinished(mineCount)) {
+        val position = InputView.inputOpenPosition()
+        mineSweeperGame.open(position)
+        printResult(mineSweeperGame, position, heightAndWidth)
+        printWinResult(mineSweeperGame, mineCount)
+    }
+}
+
+private fun printResult(mineSweeperGame: MineSweeperGame, position: Position, heightAndWidth: HeightAndWidth) {
+    when (mineSweeperGame.isMine(position)) {
+        true -> ResultView.printLoseGameMessage()
+        false -> ResultView.printMines(mineSweeperGame, heightAndWidth)
+    }
+}
+
+private fun printWinResult(mineSweeperGame: MineSweeperGame, mineCount: Size) {
+    if (mineSweeperGame.isWin(mineCount)) {
+        ResultView.printWinGameMessage()
+    }
 }
diff --git a/src/main/kotlin/minesweeper/domain/CellFinder.kt b/src/main/kotlin/minesweeper/domain/CellFinder.kt
index dda0a4740..8da3131ab 100644
--- a/src/main/kotlin/minesweeper/domain/CellFinder.kt
+++ b/src/main/kotlin/minesweeper/domain/CellFinder.kt
@@ -3,10 +3,6 @@ package minesweeper.domain
 class CellFinder(private val map: MutableMap<Position, Cell>) {
     private constructor(initPositions: List<Position>) : this(initPositions.associateWith { Cell(it) }.toMutableMap())
 
-    private val list = listOf(
-        Position(-1, -1), Position(-1, 0), Position(-1, 1), Position(0, -1), Position(0, 1), Position(1, -1), Position(1, 0), Position(1, 1)
-    )
-
     fun convert(minePosition: List<Position>) {
         minePosition.forEach {
             map[it] = Cell(it, true)
@@ -17,12 +13,21 @@ class CellFinder(private val map: MutableMap<Position, Cell>) {
         return map[position]
     }
 
-    fun getAroundMinesCount(cell: Cell): Int {
-        val position = cell.position
-        return list.mapNotNull {
-            val nextPosition = position + it
-            find(nextPosition)
-        }.count { it.isMine }
+    fun getAroundMinesCount(position: Position): Int {
+        return position.getAround()
+            .mapNotNull { find(it) }
+            .count {
+                it.isMine
+            }
+    }
+
+    fun isMine(position: Position): Boolean {
+        val cell = find(position) ?: throw IllegalArgumentException("주어진 위치를 찾을 수 없습니다.")
+        return cell.isMine
+    }
+
+    fun size(): Int {
+        return map.size
     }
 
     companion object {
diff --git a/src/main/kotlin/minesweeper/domain/HeightAndWidth.kt b/src/main/kotlin/minesweeper/domain/HeightAndWidth.kt
new file mode 100644
index 000000000..70875eb4d
--- /dev/null
+++ b/src/main/kotlin/minesweeper/domain/HeightAndWidth.kt
@@ -0,0 +1,3 @@
+package minesweeper.domain
+
+data class HeightAndWidth(val height: Size, val width: Size)
diff --git a/src/main/kotlin/minesweeper/domain/MineSweeperGame.kt b/src/main/kotlin/minesweeper/domain/MineSweeperGame.kt
new file mode 100644
index 000000000..19b181a46
--- /dev/null
+++ b/src/main/kotlin/minesweeper/domain/MineSweeperGame.kt
@@ -0,0 +1,55 @@
+package minesweeper.domain
+
+class MineSweeperGame(
+    private val cellFinder: CellFinder,
+    private val openPositions: MutableSet<Position> = mutableSetOf(),
+) {
+
+    fun open(position: Position) {
+        if (cellFinder.find(position) == null) {
+            return
+        }
+
+        openPositions.add(position)
+        if (getAroundMinesCount(position) != 0) {
+            return
+        }
+        position.getAdjacent()
+            .filter { !isOpen(it) && !isMine(it) }
+            .forEach { open(it) }
+    }
+
+    fun isOpen(position: Position): Boolean {
+        if (cellFinder.find(position) == null) {
+            return false
+        }
+        return openPositions.contains(position)
+    }
+
+    fun isMine(position: Position): Boolean {
+        if (cellFinder.find(position) == null) {
+            return false
+        }
+        return cellFinder.isMine(position)
+    }
+
+    fun isFinished(mineCount: Size): Boolean {
+        if (isLose()) {
+            return true
+        }
+
+        return cellFinder.size() == openPositions.size + mineCount.value
+    }
+
+    fun getAroundMinesCount(position: Position): Int {
+        return cellFinder.getAroundMinesCount(position)
+    }
+
+    fun isWin(mineCount: Size): Boolean {
+        return cellFinder.size() == openPositions.size + mineCount.value
+    }
+
+    private fun isLose(): Boolean {
+        return openPositions.any { isMine(it) }
+    }
+}
diff --git a/src/main/kotlin/minesweeper/domain/Position.kt b/src/main/kotlin/minesweeper/domain/Position.kt
index abfd5e1f5..f27787e9a 100644
--- a/src/main/kotlin/minesweeper/domain/Position.kt
+++ b/src/main/kotlin/minesweeper/domain/Position.kt
@@ -1,10 +1,37 @@
 package minesweeper.domain
 
+private val leftUp = Position(-1, -1)
+private val up = Position(-1, 0)
+private val rightUp = Position(-1, 1)
+private val left = Position(0, -1)
+private val right = Position(0, 1)
+private val leftDown = Position(1, -1)
+private val down = Position(1, 0)
+private val rightDown = Position(1, 1)
+
 data class Position(val x: Point, val y: Point) {
+    constructor(x: String, y: String) : this(Point(x.toInt()), Point(y.toInt()))
     constructor(x: Int, y: Int) : this(Point(x), Point(y))
     constructor(x: Size, y: Size) : this(Point(x.value), Point(y.value))
 
     operator fun plus(it: Position): Position {
         return Position(x + it.x, y + it.y)
     }
+
+    fun getAround(): List<Position> {
+        return aroundPositions.map {
+            this + it
+        }
+    }
+
+    fun getAdjacent(): List<Position> {
+        return adjacentPositions.map {
+            this + it
+        }
+    }
+
+    companion object {
+        private val aroundPositions = listOf(leftUp, up, rightUp, left, right, leftDown, down, rightDown)
+        private val adjacentPositions = listOf(up, left, right, down)
+    }
 }
diff --git a/src/main/kotlin/minesweeper/ui/InputView.kt b/src/main/kotlin/minesweeper/ui/InputView.kt
index ff91c73af..3e340d1c6 100644
--- a/src/main/kotlin/minesweeper/ui/InputView.kt
+++ b/src/main/kotlin/minesweeper/ui/InputView.kt
@@ -1,5 +1,6 @@
 package minesweeper.ui
 
+import minesweeper.domain.Position
 import minesweeper.domain.Size
 
 object InputView {
@@ -26,4 +27,14 @@ object InputView {
             inputSize(inputType)
         }
     }
+
+    fun inputOpenPosition(): Position {
+        print("open: ")
+        return try {
+            val inputPosition = readln().split(", ")
+            Position(inputPosition[0], inputPosition[1])
+        } catch (e: RuntimeException) {
+            inputOpenPosition()
+        }
+    }
 }
diff --git a/src/main/kotlin/minesweeper/ui/ResultView.kt b/src/main/kotlin/minesweeper/ui/ResultView.kt
index ab4bdc884..159ca5052 100644
--- a/src/main/kotlin/minesweeper/ui/ResultView.kt
+++ b/src/main/kotlin/minesweeper/ui/ResultView.kt
@@ -1,29 +1,46 @@
 package minesweeper.ui
 
-import minesweeper.domain.CellFinder
+import minesweeper.domain.HeightAndWidth
+import minesweeper.domain.MineSweeperGame
 import minesweeper.domain.Position
 import minesweeper.domain.Size
 
 object ResultView {
 
-    private const val mine_symbol = "*"
+    private const val mine_symbol = "C"
 
-    fun printMines(height: Size, width: Size, cellFinder: CellFinder) {
+    fun printMines(mineSweeperGame: MineSweeperGame, heightAndWidth: HeightAndWidth) {
+        heightAndWidth.height
+            .getNumbers()
+            .forEach { printRow(it, heightAndWidth.width, mineSweeperGame) }
         println()
-        println("지뢰찾기 게임 시작")
-        height.getNumbers()
-            .forEach { printRow(it, width, cellFinder) }
     }
 
-    private fun printRow(rowNum: Size, width: Size, cellFinder: CellFinder) {
+    private fun printRow(rowNum: Size, width: Size, mineSweeperGame: MineSweeperGame) {
         width.getNumbers()
             .forEach {
-                val cell = cellFinder.find(Position(rowNum, it)) ?: throw RuntimeException("출력 도중 알 수 없는 에러가 발생했습니다.")
-                when (cell.isMine) {
-                    true -> print("$mine_symbol ")
-                    false -> print("${cellFinder.getAroundMinesCount(cell)} ")
-                }
+                val position = Position(rowNum, it)
+                printEachPosition(mineSweeperGame, position)
             }
         println()
     }
+
+    private fun printEachPosition(mineSweeperGame: MineSweeperGame, position: Position) {
+        when (mineSweeperGame.isOpen(position)) {
+            true -> print("${mineSweeperGame.getAroundMinesCount(position)} ")
+            false -> print("$mine_symbol ")
+        }
+    }
+
+    fun printGameStartMessage() {
+        println("지뢰찾기 게임 시작")
+    }
+
+    fun printLoseGameMessage() {
+        println("Lose Game.")
+    }
+
+    fun printWinGameMessage() {
+        println("Win Game.")
+    }
 }
diff --git a/src/test/kotlin/minesweeper/domain/CellFinderTest.kt b/src/test/kotlin/minesweeper/domain/CellFinderTest.kt
index 2b1e1baca..78c989961 100644
--- a/src/test/kotlin/minesweeper/domain/CellFinderTest.kt
+++ b/src/test/kotlin/minesweeper/domain/CellFinderTest.kt
@@ -1,6 +1,8 @@
 package minesweeper.domain
 
 import io.kotest.core.spec.style.BehaviorSpec
+import io.kotest.data.forAll
+import io.kotest.data.row
 import io.kotest.matchers.shouldBe
 
 class CellFinderTest : BehaviorSpec({
@@ -16,16 +18,50 @@ class CellFinderTest : BehaviorSpec({
         }
     }
 
-    Given("셀이 주어질 때") {
-        val cell = Cell(Position(2, 2))
+    Given("위치가 주어질 때") {
+        val position = Position(2, 2)
         val cellFinder = CellFinder.init(Size(10), Size(10))
         val minePositions = listOf(Position(1, 2), Position(1, 3))
         cellFinder.convert(minePositions)
         When("CellFinder의 getAroundMinesCount 함수를 호출하면") {
-            val result = cellFinder.getAroundMinesCount(cell)
+            val result = cellFinder.getAroundMinesCount(position)
             Then("자신을 제외한 주변 8개 사각형에 포함된 지뢰의 개수를 반환한다.") {
                 result shouldBe 2
             }
         }
     }
+
+    Given("지뢰가 있는지 알고 싶은 위치가 주어질 때") {
+        val cellFinder = CellFinder.init(Size(10), Size(10))
+        val minePositions = listOf(Position(1, 2), Position(1, 3))
+        cellFinder.convert(minePositions)
+        When("isMine 함수를 호출하면") {
+            Then("지뢰가 있는지 여부를 반환한다.") {
+                forAll(
+                    row(Position(1, 2), true),
+                    row(Position(1, 3), true),
+                    row(Position(2, 2), false),
+                ) { position, expected ->
+                    cellFinder.isMine(position) shouldBe expected
+                }
+            }
+        }
+    }
+
+    Given("찾고 싶은 위치가 주어질 때") {
+        val cellFinder = CellFinder.init(Size(10), Size(10))
+        val minePositions = listOf(Position(1, 2), Position(1, 3))
+        cellFinder.convert(minePositions)
+        When("find 함수를 호출하면") {
+            Then("해당 위치의 Cell을 반환한다.") {
+                forAll(
+                    row(Position(1, 2)),
+                    row(Position(1, 3)),
+                    row(Position(2, 2)),
+                ) { position ->
+                    cellFinder.find(position)?.position shouldBe position
+                }
+            }
+        }
+    }
 })
diff --git a/src/test/kotlin/minesweeper/domain/MineSweeperGameTest.kt b/src/test/kotlin/minesweeper/domain/MineSweeperGameTest.kt
new file mode 100644
index 000000000..f9d910607
--- /dev/null
+++ b/src/test/kotlin/minesweeper/domain/MineSweeperGameTest.kt
@@ -0,0 +1,85 @@
+package minesweeper.domain
+
+import io.kotest.core.spec.style.BehaviorSpec
+import io.kotest.data.forAll
+import io.kotest.data.row
+import io.kotest.matchers.shouldBe
+
+class MineSweeperGameTest : BehaviorSpec({
+    Given("지뢰가 있는지 알고 싶은 위치가 주어지면") {
+        val height = Size(10)
+        val width = Size(10)
+        val mineCount = Size(10)
+
+        val minePositions = FixedPositionGenerator(height, width).generate(mineCount)
+        val cellFinder = CellFinder.init(height, width)
+        cellFinder.convert(minePositions)
+        When("지뢰찾기게임은") {
+            val mineSweeperGame = MineSweeperGame(cellFinder)
+            Then("해당 위치의 지뢰 유무를 반환한다.") {
+                forAll(
+                    row(Position(1, 2), true),
+                    row(Position(-1, -1), false),
+                    row(Position(5, 5), false),
+                ) { position, expected ->
+                    mineSweeperGame.isMine(position) shouldBe expected
+                }
+            }
+        }
+    }
+
+    Given("Open 하려는 위치가 주어지면") {
+        val height = Size(10)
+        val width = Size(10)
+        val mineCount = Size(10)
+
+        val minePositions = FixedPositionGenerator(height, width).generate(mineCount)
+        val cellFinder = CellFinder.init(height, width)
+        cellFinder.convert(minePositions)
+
+        val mineSweeperGame = MineSweeperGame(cellFinder)
+        When("지뢰찾기게임은") {
+            mineSweeperGame.open(Position(10, 10))
+            Then("지뢰가 없는 인접한 칸이 모두 열린다.") {
+                forAll(
+                    row(Position(1, 1), false),
+                    row(Position(-1, -1), false),
+                    row(Position(1, 2), false),
+                    row(Position(5, 5), true),
+                    row(Position(10, 10), true),
+                ) { position, expected ->
+                    mineSweeperGame.isOpen(position) shouldBe expected
+                }
+            }
+        }
+    }
+
+    Given("지뢰 개수가 주어지면") {
+        val height = Size(10)
+        val width = Size(10)
+        val mineCount = Size(10)
+
+        val minePositions = FixedPositionGenerator(height, width).generate(mineCount)
+        val cellFinder = CellFinder.init(height, width)
+        cellFinder.convert(minePositions)
+
+        When("지뢰찾기게임은") {
+            val mineSweeperGame = MineSweeperGame(cellFinder)
+            val actual = mineSweeperGame.isWin(mineCount)
+            Then("게임에서 이겼는지 여부를 반환한다.") {
+                actual shouldBe false
+            }
+        }
+
+        When("지뢰찾기게임은") {
+            val mineSweeperGame = MineSweeperGame(cellFinder)
+            mineSweeperGame.open(Position(1, 1))
+            mineSweeperGame.open(Position(2, 2))
+            mineSweeperGame.open(Position(10, 10))
+            val actual = mineSweeperGame.isWin(mineCount)
+            Then("게임에서 이겼는지 여부를 반환한다.") {
+                actual shouldBe true
+            }
+        }
+    }
+})
diff --git a/src/test/kotlin/minesweeper/domain/PositionTest.kt b/src/test/kotlin/minesweeper/domain/PositionTest.kt
new file mode 100644
index 000000000..1ea166d18
--- /dev/null
+++ b/src/test/kotlin/minesweeper/domain/PositionTest.kt
@@ -0,0 +1,40 @@
+package minesweeper.domain
+
+import io.kotest.core.spec.style.BehaviorSpec
+import io.kotest.matchers.collections.shouldContainExactly
+
+class PositionTest : BehaviorSpec({
+    Given("주변 8개의 위치를 알고 싶은 위치가 주어지면") {
+        val position = Position(2, 2)
+        When("getAround 함수는") {
+            val aroundPositions = position.getAround()
+            Then("주변 8개의 위치를 반환한다.") {
+                aroundPositions shouldContainExactly listOf(
+                    Position(1, 1),
+                    Position(1, 2),
+                    Position(1, 3),
+                    Position(2, 1),
+                    Position(2, 3),
+                    Position(3, 1),
+                    Position(3, 2),
+                    Position(3, 3),
+                )
+            }
+        }
+    }
+
+    Given("인접한 상하좌우의 위치를 알고 싶은 위치가 주어지면") {
+        val position = Position(2, 2)
+        When("getAdjacent 함수는") {
+            val aroundPositions = position.getAdjacent()
+            Then("인접한 상하좌우의 위치를 반환한다.") {
+                aroundPositions shouldContainExactly listOf(
+                    Position(1, 2),
+                    Position(2, 1),
+                    Position(2, 3),
+                    Position(3, 2),
+                )
+            }
+        }
+    }
+})
diff --git a/src/test/kotlin/minesweeper/domain/SizeTest.kt b/src/test/kotlin/minesweeper/domain/SizeTest.kt
index 2a479b903..165b27a93 100644
--- a/src/test/kotlin/minesweeper/domain/SizeTest.kt
+++ b/src/test/kotlin/minesweeper/domain/SizeTest.kt
@@ -71,4 +71,14 @@ class SizeTest : BehaviorSpec({
             }
         }
     }
+
+    Given("더하려는 다른 사이즈가 주어지면") {
+        val other = Size(1)
+        When("사이즈는") {
+            val actual = Size(2) + other
+            Then("더한 값 원소로 갖는 사이즈를 반환한다.") {
+                actual shouldBe Size(3)
+            }
+        }
+    }
 })