Play the fun matching game, a.k.a. "Concentration" or "Memory", on Cards Match Game.
You can choose to play solo, against CALI, with your friends, or with people all over the world. When setting up a game to play with your friends, a url is provided to share with them so that they can join in the game. The games with friends also have an instant chat feature on the game page so you can chat with each other during the game.
Customize your game on the Set Up Game page. Choose the game difficulty level / how many cards are used. When playing solo, you can show a timer to time how fast you go, show your number of moves, and even how many "oops" you make in your game. Use card numbers, or not. Choose your cards category, or choose to be surprised. You can test your memorization skills by revealing the cards for seconds (1, 2, or 5 seconds) before starting the game.
How To Play: Choose a pair of cards - if the pictures on the cards match, you get a match and go again. Otherwise, it's the other person's turn, if you're not playing solo.