Now on K2Z (version 1.3.13) you can play rated 16x16 games
with SWAP enabled.
We tried this last night with Twixter. With a time control equals to Sudden Death 5min. Blitz mode.

We had fun !! of course first moves are very important !!
no mistakes allowed....

The parameter used to compute points won/lost is 50% smaller than for a 24x24 game. That means you win/lose less points.

of course intermediate sizes are allowed (17x17, 18x18, ..etc)

cya