You probably already know how lớn play Tic-Tac-Toe. It"s a really simple game, right? That"s what most people think. But if you really wrap your brain around it, you"ll discover that Tic-Tac-Toe isn"t quite as simple as you think!

Tic-Tac -Toe (along with a lot of other games) involves looking ahead and trying lớn figure out what the person playing against you might vì next.

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1. The game is played on a grid that"s 3 squares by 3 squares.

2. You are X, your frikết thúc (or the computer in this case) is O. Players take turns putting their marks in empty squares.

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3. The first player to get 3 of her marks in a row (up, down, across, or diagonally) is the winner.

4. When all 9 squares are full, the game is over. If no player has 3 marks in a row, the game ends in a tie.

To beat the computer (or at least tie), you need lớn make use of a little bit of strategy. Strategy means figuring out what you need to lớn bởi lớn win. Part of your strategy is trying khổng lồ figure out how to get three Xs in a row. The other part is trying to figure out how khổng lồ stop the computer from getting three Os in a row. After you put an X in a square, you start looking ahead. Where"s the best place for your next X? You look at the empty squares và decide which ones are good choices—which ones might let you make three Xs in a row. You also have sầu to watch where the computer puts its O. That could change what you vị next. If the computer gets two Os in a row, you have to lớn put your next X in the last empty square in that row, or the computer will win. You are forced khổng lồ play in a particular square or thua kém the game. If you always pay attention và look ahead, you"ll never thất bại a game of Tic-Tac-Toe. You may not win, but at least you"ll tie.
This brain-bending puzzle comes from the kiemtung.vn"s Brain Explorer,a book available for purchase through our online store. ©2000 The kiemtung.vn