Now that I am on vacation once again, I can rectify that error, instructing one and all on the minor challenge of creating a row of four blocks in your color or symbol without helping your opponent too much in the process. Why would you help your opponent? Because you're participating in a competitive three-legged race, with you and your opponent sharing space on the same bricks and therefore always placing both colors in the wall each time you build.
This concept isn't unique as Néstor Romeral Andrés published the similar, but more free-form TAIJI through Blue Panther in 2007, but I'd like to see more of it, if possible. Silly party games like Happy Salmon and Hands have something along these lines in that you score only when you help an opponent score at the same time (while still having only a single winner), but if you can suggest other competitive games with a three-legged element, I'm curious to hear about them!