Tic Tac Toe vs Numerical Tic Tac Toe

The most easy, fun and stylish Tic Tac Toe so far! Put your finger on the board! Download it now! It's free! What you get: - Play against real people! Online multiplayer or on the same device (2 players mode) - Relax on your own playing single player - Easy to get: just tap and play - Loads of super fun Game Center achievements - Colourful themes - Superb for all age - Kids will love it! Get 3 of your symbol on a vertical, horizontal or diagonal line before your opponent and win. The matches are really quick and easy, perfect for your commuting or while you wait. Tic Tac Toe is another classic for your iPhone, iPad and iPod Touch, from the creators of Four in a Row and Dots and Boxes. Challenge a friend next to you on the same device or find an opponent online (multiplayer). Or try and beat our well-trained virtual player (single mode against the computer). Tic Tac Toe is completely free. If you love games like Chess, Checkers, Dots and Boxes and Four in a Row and other fun pastimes, you will love TicTacToe. Download it now and start playing immediately. FOLLOW US ON SOCIAL MEDIA: @outofthebit facebook.com/outofthebit

Numerical tic-tac-toe is a variant of tic-tac-toe that replaces the traditional Xs and Os with odd and even numbers. Players alternate placing numbers, aiming to form a line that adds up to 15.  The game is played on a normal nine square tic-tac-toe board. The odd player begins with the numbers 1, 3, 5, 7, and 9. The even player begins with the numbers 2, 4, 6, and 8. Odd always goes first. The two sides alternate placing numbers on the board in empty squares. Numbers cannot be repeated. So, there will only ever be a single instance of each number on the board. The first player to put a number down that achieves a sum of 15 composed of three numbers in a row, column, or diagonal wins the game. Note, that two numbers adding to 15 is not sufficient. So, a 6 next to a 9 is not a win. *Features* - Play against an AI opponent - Play against a friend - Three levels of difficulty - Customizable colors *History* Numerical tic-tac-toe was invented in the late 1950s by American mathematician Ronald Graham. A similar game was contemporaneously invented by P.H. Nygaard. In 1990, George Markowsy wrote a computer program that solved numerical tic-tac-toe. He proved that 1 in the top middle slot is a winning first move for odd. In other words, in perfect play, odd wins the game. Markowsky published his findings in The Journal of Recreational Mathematics.