By the way, if You are five in a line player, try this: game is called 'mini gomoku' invented by one of top polish players (Adifek): rules are swap five in a line, but each player put new stones only during first 15 moves (30 moves total), after that, in next turn you pick up one stone and put it in other place (no more 'new' stones on board) moves that doesn't win: you have 6 stones in a row and you pick up one, this isn't winning move
draw is after 70 moves (first 15 putting + 55 moving) or when position on board is repeated three times in 6 next moves
As niicegiirll said some players probably will put stones in corners so game will start as normal. To avoid these situations i want propose restrictions for first move. It should be putted in centtral square (maybe 7x7?). : )