nosovs,

I like the idea of improving Pente, but I don't think any point system will work. How do you handle the situation when a player resigns? Or when a player 'knows' it's over and doesn't make all the available extensions or captures?

I think the only way to improve the rankings for Pente is to calculate two separate rankings, one for win/losses as player 1 and one for wins/losses as player 2. Of course, these scores could be combined in some way (added or averaged or whatever) to find one overall score, but I think this is the only way to create a score that acurately reflects a player's true ability.

Thad