I forgot to mention the whole SNAP thing.
The way ranking works (and ranking is purely for bragging and some rewards like avatars), ten points gets you up to your next rank. Ranking starts at 1 and goes up, so higher is better. Every game you win earns you two points, so five wins will increase your rank one level. But, if you lose, you lose 2 points, so losing 5 games will makes you go down a rank.
But you can retreat if you feel you can't win, retreat halves the number of points you lose, so you lose only 1 point on a retreat.
BUT, if any player thinks they can win, they can SNAP and double the stakes. If the opponent continues after the snap, 4 points will be gotten on a win, and 4 points lost on a loss. Retreating after a snap loses only 2. Of course, you can retreat in response to the snap and still only lose 1 if you aren't confident to play it out.
But if you ARE confident, you can Snap Back! and double the bet again. Now whoever wins gets 8 points and whoever loses is 8 points lost.
The above screenshot is of someone that snapped me on fricken turn one. Naturally I had to snap back and wreck him, felt fucking good.