A while back, somebody made the suggestion that a pente game (or series of versions thereof) could be played with the goal of making TWO separate fives-in-a-row. I think this would be an interesting idea to explore.

Some special rules would need to be implemented. Once a five line is established, those stones would be invulnerable, but only one of them could be used for the intersection of the second five line. It would be protracted compared to the regular versions, but would add the tactical aspect of allowing your opponent to get a five while you build or attack elsewhere.

It could be called "double pente" or something of that sort... While on the subject of nomenklature, "Small Pente" and "Small Keryo Pente" seem rather lengthy. How about instead "Pente13" and "Keryo13"?