Do you know “Gomoku” ?
It`s a great board puzzle game, and
everyone can play it because its rule is very simple.
Just make straight line with 5 stones; -O-O-O-O-O-
But this “Speed Gomoku” has a special feature.
– You and your enemy can SKIP the TURN each other.
So you`ll need to very speedy decision,
and you`ll have to be excited more than basic Gomoku.

More about “Gomoku” ?
see http://en.wikipedia.org/wiki/Gomoku
“Gomoku” is called also “Gobang” or “5 in a row”.