diff --git a/part_1/tic_tac_toe/.vscode/launch.json b/part_1/tic_tac_toe/.vscode/launch.json
new file mode 100644
index 0000000..edd87ae
--- /dev/null
+++ b/part_1/tic_tac_toe/.vscode/launch.json
@@ -0,0 +1,14 @@
+{
+    "version": "0.2.0",
+    "configurations": [
+
+        {
+            "name": "Launch Package",
+            "type": "go",
+            "request": "launch",
+            "mode": "auto",
+            "program": "${fileDirname}", // <- ставим запятую
+            "console": "integratedTerminal"
+        }
+    ]
+}
diff --git a/part_1/tic_tac_toe/go.mod b/part_1/tic_tac_toe/go.mod
new file mode 100644
index 0000000..ced943a
--- /dev/null
+++ b/part_1/tic_tac_toe/go.mod
@@ -0,0 +1,3 @@
+module tic-tac-toe
+
+go 1.24.0
diff --git a/part_1/tic_tac_toe/main.go b/part_1/tic_tac_toe/main.go
new file mode 100644
index 0000000..7406064
--- /dev/null
+++ b/part_1/tic_tac_toe/main.go
@@ -0,0 +1,247 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strconv"
+	"strings"
+)
+
+type GameState int
+type BoardField int
+
+const (
+	empty BoardField = iota
+	cross
+	nought
+)
+
+const (
+	playing GameState = iota
+	draw
+	crossWin
+	noughtWin
+	quit
+)
+
+func main() {
+	reader := bufio.NewReader(os.Stdin)
+	boardSize := 3 // размер игрового поля по умолчанию
+	state := playing
+	currentPlayer := cross // текущий игрок
+
+	// Ввод размера доски
+	for {
+		fmt.Print("Enter the size of the board (3-9): ")
+		input, err := reader.ReadString('\n')
+		if err != nil {
+			fmt.Println("Error reading input. Please try again.")
+			continue
+		}
+		input = strings.TrimSpace(input)
+		size, err := strconv.Atoi(input)
+		if err != nil {
+			size = boardSize
+		}
+		if size < 3 || size > 9 {
+			fmt.Println("Invalid size, please enter again")
+			continue
+		}
+		boardSize = size
+		break
+	}
+
+	// Инициализация доски
+	board := make([][]BoardField, boardSize)
+	for i := range boardSize {
+		board[i] = make([]BoardField, boardSize)
+	}
+
+	// Вывод в терминал состояния игрового поля
+	fmt.Print("  ")
+	for i := range boardSize {
+		fmt.Printf("%d ", i+1) // вывод номера столбца
+	}
+	fmt.Println()
+	for i := range boardSize {
+		fmt.Printf("%d ", i+1) // вывод номера строки
+		for j := range boardSize {
+			switch board[i][j] {
+			case empty:
+				fmt.Print(". ")
+			case cross:
+				fmt.Print("X ")
+			case nought:
+				fmt.Print("O ")
+			}
+		}
+		fmt.Println()
+	}
+	// Завершение вывода в терминал
+
+	// Основной игровой цикл
+	for state == playing {
+		// Вывод сообщения о ходе текущего игрока
+		playerSymbol := "X"
+		if currentPlayer == nought {
+			playerSymbol = "O"
+		}
+		fmt.Printf("%s's turn. Enter row and column (e.g. 1 2): ",
+			playerSymbol)
+
+		validInput := false
+		for !validInput {
+			input, err := reader.ReadString('\n')
+			if err != nil {
+				fmt.Println("Invalid input. Please try again.")
+				continue
+			}
+
+			input = strings.TrimSpace(input)
+			if input == "q" {
+				state = quit
+				break
+			}
+
+			parts := strings.Fields(input)
+			if len(parts) != 2 {
+				fmt.Println("Invalid input. Please try again.")
+				continue
+			}
+
+			row, err1 := strconv.Atoi(parts[0])
+			col, err2 := strconv.Atoi(parts[1])
+
+			if err1 != nil || err2 != nil {
+				fmt.Println("Invalid input. Please try again.")
+				continue
+			}
+
+			if row < 1 || row > boardSize || col < 1 || col > boardSize {
+				fmt.Println("Invalid input. Please try again.")
+				continue
+			}
+			// Приведение к 0-индексации
+			row--
+			col--
+
+			if board[row][col] != empty {
+				fmt.Println("This cell is already occupied!")
+				continue
+			}
+			// Выполнение хода
+			board[row][col] = currentPlayer
+
+			// Проверка выигрыша по строкам и столбцам
+			winFound := false
+			for i := range boardSize {
+				rowWin := true
+				colWin := true
+				for j := range boardSize {
+					if board[i][j] != currentPlayer {
+						rowWin = false
+					}
+					if board[j][i] != currentPlayer {
+						colWin = false
+					}
+				}
+				if rowWin || colWin {
+					winFound = true
+					break
+				}
+			}
+
+			// Проверка главной диагонали
+			if !winFound {
+				diagWin := true
+				for i := range boardSize {
+					if board[i][i] != currentPlayer {
+						diagWin = false
+						break
+					}
+				}
+				if diagWin {
+					winFound = true
+				}
+			}
+
+			// Проверка обратной диагонали
+			if !winFound {
+				antiDiagWin := true
+				for i := range boardSize {
+					if board[i][boardSize-i-1] != currentPlayer {
+						antiDiagWin = false
+						break
+					}
+				}
+				if antiDiagWin {
+					winFound = true
+				}
+			}
+
+			if winFound {
+				if currentPlayer == cross {
+					state = crossWin
+				} else {
+					state = noughtWin
+				}
+			} else {
+				// Проверка на ничью (заполнена ли доска)
+				full := true
+				for i := range boardSize {
+					for j := range boardSize {
+						if board[i][j] == empty {
+							full = false
+							break
+						}
+					}
+					if !full {
+						break
+					}
+				}
+				if full {
+					state = draw
+				}
+			}
+
+			// Вывод текущего состояния доски
+			fmt.Print("  ")
+			for i := range boardSize {
+				fmt.Printf("%d ", i+1)
+			}
+			fmt.Println()
+			for i := range boardSize {
+				fmt.Printf("%d ", i+1)
+				for j := range boardSize {
+					switch board[i][j] {
+					case empty:
+						fmt.Print(". ")
+					case cross:
+						fmt.Print("X ")
+					case nought:
+						fmt.Print("O ")
+					}
+				}
+				fmt.Println()
+			}
+
+			// Вывод сообщения о результате, если игра окончена
+			if state == crossWin {
+				fmt.Println("X wins!")
+			} else if state == noughtWin {
+				fmt.Println("O wins!")
+			} else if state == draw {
+				fmt.Println("It's a draw!")
+			} else {
+				// Переключение игрока, если игра продолжается
+				if currentPlayer == cross {
+					currentPlayer = nought
+				} else {
+					currentPlayer = cross
+				}
+			}
+			validInput = true
+		}
+	}
+}