2 player tic tac toe javascript

Each player will take turns to choose a square. He is a simpleton. This function checks all possible result of Tic Tac Toe game and then changes the color of winning icons. The computer must recognize the moves of the player and act accordingly to player’s strategy using a MiniMax algorithm. It helps me keep this site up and running. After that the function checks the status of the game to check whether the game should end or continue, and changes the current player to contrasting value. The computer must recognize the moves of the player and act accordingly to player’s strategy using a MiniMax algorithm. In this game there are two players, the player who makes three of their marks in row and column or one of the two diagonals wins the game. Instead of “go middle or next available”, I would suggest a slightly more intelligent approach, which accounts for more advantageous moves even after the middle is taken. He will take a win when its there, and he will try to prevent a loss. Tic tac toe is one of the favorite paper-and-pencil games of many. When he can’t find an obvious move to make he reverts back to the same simple ways of the moron. I received some positive feedback, so for this week’s post I decided to build a tic tac toe game using JavaScript and describe its construction in detail. I borrowed this awesome and succinct styling from this blog post. When you change the difficulty level, the game responds by making different moves in response to yours. Next element is .game div. In my last post I showed you guys a matching game I built using JavaScript and talked a bit about front-end web technologies. Required fields are marked *. Finally we come to the buttons. The max-width, padding, and margin styling on the main tag centers our game on the screen. The first thing we need to do is initialize some variables. The most important event we have to respond to is when a player clicks on a square. There are some rules that we are going to define here is that as we know the primary thing is move, here the player cannot undo that move. Most of the people know that when we were kids we used to play this game on paper. I’m going to break the explanation of the tic-tac-toe.css file up into several sections because I think that will make it easier to follow as a reader. Line 186: If the player didn’t win then we must continue so that his opponent can make a move. Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window). Free Code Camp is a demanding and time-consuming development course that aims to teach JavaScript code. Line 177: The second thing we do is check if the game is over. Alright, that’s it for the CSS! Let me know what you think, and what kind of games you would like to see me make in the future. If you want to really streamline the AI, I would rework your current algorithm (sorry, it’s nice and readable right now) to use the alpha-beta pruning algorithm. Next we are going to talk about styling for the message box, difficulty drop down list, and the top-level controls section. It adds the icon to the center .game-field div and deletes attribute onClick to lock this position. As I mentioned previously, go read through the other functions to get a fuller understanding of how the game logic works. Next comes the styling of our game board itself. A crazy computer and programming lover. It’s a good place for including elements that affect the page as a whole. Then it uses this id to find the right .game-field div and place the icon of current player on that field. You can play the game given below to test how it works. Going second puts him at a disadvantage, so he favors the center square for its defensive qualities. In this js program, we track each move for the next players move. With that in mind, let’s talk about how this program works. However, he does have weaknesses that can be exploited. The moron option is selected by default. The genius is much more sophisticated. Together, they form a tab that looks like this: The first link tag contains a reference to our tic-tac-toe.css file. Nicely done! The firstMove function is responsible for making a first move in game for the computer. Lines 179 – 181: Third, we set the message displayed to the player to the default, “Pick a square!” message. It works by exhausting every possible outcome of the game from the current state of the board, “pruning” paths that are deemed useless to continue following. When you click on the “Play Again” button, the board is cleared and you can play another round of tic tac toe. It takes 3 arguments — 3 id’s of winning elements and adds a .win class to them. If a draw has been reached then we set the game over variable to true and set the draw message. If a marker has already been placed there then the player is trying to make an illegal move. But the concept of programming it is not. As a reader of my blog, I bet you are smart enough to exploit the flaws in his thinking. If something in the code is confusing then leave a comment and I’ll do my best to explain it! There are lots of things that need to be checked. The function called opponentMove handles this, and it will be discussed later in detail. Here we can write the logic this way, if ((count%2)==1), then it is player 1’s turn, otherwise it is player 2’s turn. The background styling on the body tag simply sets the light blue background color of the page using RGB values. There are two difficulty levels: moron and genius. I also took on the additional challenge of not using any external JavaScript libraries in the project. We played it many times till we win. Use this approach defensively to prevent the user from getting the good spots since the user always goes first, and then offensively if no defense is required. Yay for reusability! Lines 188 – 189: Now that the player’s move is finished we need to make a move for the computer. Since tic-tac-toe ends in 3 – 5 moves, this algorithm can easily and quickly calculate the best move to make and will never lose, always guaranteeing at least a tie. After creating basic HTML code it’s time to add styles. If you haven’t done much programming before, it’s probably best to check out my introductory post on computers first. Our board is represented by a sequential list of numbers, and there are eight possible win conditions. The moron always takes the first available square in order of id. Then we set variables for the id and the HTML of the square that was selected by the player. Tic Tac Toe (also called Noughts and crosses, Xs and Os, XOX Game) is a very popular childrens pencil and paper game, which is often enjoyed by many adults, as well. I’m going to describe the basic structure and the artificial intelligence, but I’m not going to describe each and every function. Then it calls 2 functions — firstMove and setCurrPl. Once you’ve bested the moron, see if you can defeat the tic-tac-toe genius. Click here to get free JavaScripts, hassle free! The game is a lot of fun for people of all ages and provides one with a great brain workout too! This algorithm will scale to any size board and will always choose the best move. We also varied the size of the border to get a more three dimensional look and feel. If there are no win conditions met and there are no more available moves to be made then we must have reached a draw. It does so by checking which of the players has made a move, then it adds this player icon to the field and removes attribute onClick to prevent changing the field once more. The before-mentioned gameStatus function is responsible for checking if the game has a winner. This tag comes at the start of every HTML document you create. He spend most of his time in programming, blogging and helping other programming geeks. Following the second line break is a div containing the rest of our controls. I’m going to show you the code for each and describe the role they play in creating the final game. That’s it for the main game logic! Lines 184 -185: Since the square is open, we set the marker to “X”. We also have a few more variables for storing some useful information: An array of our squares, the number of squares, and the win conditions. Here are the three files: tic-tac-toe.html. This way we enable user to choose which figure he or she wants to play. This is important because our artificial intelligence looks at this variable to determine what move to make. Within start function there’s a single line of code — $(‘#myModal’).modal(‘show’);. This game is event-driven. The genius is more formidable than the moron, but he is a little arrogant and isn’t actually all that bright. Iterating through the remaining win scenarios (ignoring win scenarios that are already blocked by the user), find which empty tile satisfies the most scenarios and choose it. The h1 tag is contains the big “Tic Tac Toe” heading, and we add style to center it and give it that yellow coloring. The function uses switch statement to check all of available spaces one by one and place the icon in the first available space. You may play Tic Tac Toe online with other players or ch… I am sharing my simple code so that you can understand the game easily. Now we have a perfect ground to start building the logic behind this game. It could be much more difficult if the task was to create the unbeatable version of the game — check this one. When the loop is finished we need to increment the value of game.moves property and check if the game ended in a draw (all of 9 moves were executed). Or check the source code on GitHub. Let’s talk about how that styling is applied. All of those properties are needed for the game to work properly, although you could also use variables to achieve the same result. Color of the winning icons is changed by show function. So we load code on the loading of HTML document. Finally, the select tag contains two options: moron and genius. Then we add a border with rounded corners. If lost we are simply returned false. The code is shown below: We have added the class, “board” to the table in order to add styling to it. So basically we create 3 files here or we can do all code in one file which includes all html, css and javascript. This makes it very easy to beat but it does the job quite well. The goal is for everyone to learn more and have fun in the process. More importantly, we need to make the borders visible in the appropriate locations. This file is what lets us add color and positioning to our HTML document. There are two difficulty levels: moron and genius. setCurrPl function on the other hand is responsible for setting the current player. The board has three table row tags each containing three table data tags. This is possible because JavaScript is not type safe. The rest of this function is just the corresponding else blocks which we already covered. // replay.setAttribute("onclick","rep();"); // cards.forEach(card => card.classList = "card"); Your email address will not be published. tic-tac-toe.css. We need to set the size, color, and text positioning of each square. In this post I showed off the Tic Tac Toe game I made using JavaScript. We are going to break it up into two sections: the board and the controls. We played it many times till we win. We set the size of our difficulty drop down, and add rounded corners, and then we set its font size, colors, and positioning. Its programming is not that simple as it looks. If you want to learn more about how to write good programs in JavaScript, one book that I recommend is JavaScript: The Good Parts, by the legendary Douglas Crockford. By clicking on the box he can make a move as soon as the move is done, the game proceeded to give a chance to another player. Thanks for reading, and I’ll see you next time! Tic Tac Toe is a simple 2 player game that is played on a grid of 9 squares. The first step to build a working Tic Tac Toe game is to create a game object to store all information needed. All I have to create is a simple game that will allow my users to check the which figure they want to be playing, and play the game against the computer.

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