Marble Checkers vs Numerical Tic Tac Toe

The aim of this game is to move all your marbles from your base to the opposite one. Players move a single marble on each turn. A move can be either to a vacant adjacent hole or by jumping over other marbles to a vacant hole. A jump can be over their own or opponents marbles and the jumped marbles are NOT removed. Only one marbles can be jumped at the time, but a move can consist of several jumps. Each jump must be into a vacant hole. Download the “Marble Checkers” app and install it. It takes less than a minute, just follow these instructions: - Download the app - Install it on your mobile device (tablet or smartphone) - Start playing the game. Features of the “Marble Checkers” app include: - It’s compatible with 99% of mobile devices, - The app doesn’t need the internet, and doesn’t use slow the system with images while running it, - It doesn’t increase battery consumption. If you’ve used and like the app, please leave a review. We listen to your suggestions and use your input to tailor our products to our customers’ needs.

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.