Hello folks!
I've recently seen an extraordinary variant of line4 that combined simplicity of rules and totally different strategy to win (I suppose).
1. It was played on 7x6 board (size is unimportant since every extra row or column brings significant changes to the four in a row strategy)
2. First (white) player begins the game by putting a piece on the board.
3. After white's first move, both players put two pieces a turn.
4. The object is to creat a straight line of 4 or more pieces.

Simple?

Before this question occurs, I give the answer.
Why first player begins with only ONE piece? It grants second player big advantage!

Because if white had TWO pieces on their first move, they would win in 3 moves:
Example:
White: C1, D1
Black: (must block on both sides) B1, E1 - if not white win after A1, B1, or E1, F1
White: C2, D2
Black: (whatever they do, they lose -> if they play C3, D3, white win by B2, E2, if they don't play at C3, or at D3, white win by C3, C4, or in second case D3, D4)

I hope it's not very confusing, and some players will understand me.
Please state your opinion whether you like my idea, or not.