it thought this might make for an interesting game,
both players are white stone, placing one at a time. once an area is surrounded, any stones in that area that aren't surrounding an intersection or more are removed and counted as points, you also get the area itself as well, maybe put a paper with a 1 for player 1 capture, and 2 for player 2.

upon reflection, there should be some kind of maximum contiguous area you can control, maybe 25? what do you think?

I find it hard to visualize what you mean by stones surrounding stones of the same color.

With only one color and both players aiming to make the same shape I can't help to think that every game will devolve into both players avoiding to make the second to last move that forms that shape. Is that interesting if both players can avoid that move for a long time? Maybe such a game is more interesting if the players are forced for some reason to make the second to last move.