Do you miss something on BrainKing.com and would you like to see it here? Post your request into this board! If there is a more specific board for the request, (i.e. game rule changes etc) then it should be posted and discussed on that specific board.
hmm ... 3 in a line is on a small board ... 4 in a line on a big board with a limitation .. 5 in a line on a big board without limitation .. what about 6 in a line on a 3 dimensional board without limitations ? ;)