Tap two dots to join them. Make a triangle in your colour and you lose!
Who is playing?
Your nickname
Nicknames
Computer skill
How to play: Six dots sit in a ring. On your turn, tap one dot then another to
join them with your colour. If three of your lines form a triangle, you lose.
First to 5 wins takes the match. With six dots somebody always loses — a tie is impossible!
Red0
first to 5
0Blue
Red's turn
Red loses!
The maths: With six dots and two colours it is impossible for nobody to make a
triangle. This is Ramsey's theorem — in any group of six, some pattern of three is forced.