Three in one game

3 Games in 1!

This is a physical game I designed and built that combines three games in one wooden box. You can play Tic-Tac-Toe, Magic Square, or Sum-to-15. The hardware version features 9 cubes, which can be used in each of the games by rotating to show the correct face. You can try out the digital version of all three games below!

There is also a fourth meta game - can you figure out how all three games are related?

3 in 1 game

Classic Tic-Tac-Toe

Players take turns placing X and O. Get three in a row to win!

Player X's turn

Magic Square

Drag numbers 1-9 into the grid to create a magic square where all rows, columns, and diagonals have the same sum!

Drag numbers to create a magic square
1
2
3
4
5
6
7
8
9

Sum to 15

Players take turns selecting numbers 1-9. First player to have any 3 numbers that sum to 15 wins!

Red player's turn
Select a number:
1
2
3
4
5
6
7
8
9
Red Player
Blue Player
Can you figure out how all three games are related?

🎉 The Connection Revealed!

Sum-to-15 is actually the same game as Tic-Tac-Toe!

When you arrange the numbers 1-9 in a magic square, any three numbers that sum to 15 form a line (row, column, or diagonal). This means winning at Sum-to-15 is equivalent to getting three in a row!

Try it yourself below - notice how winning combinations form straight lines:

Sum-to-15 on Magic Square Layout

Red player's turn
2
7
6
9
5
1
4
3
8