Chess is a game about 2 sides fighting over power.
Chess 2, however, adds in a new force, and all the other parties stand in fear as they do nothing else but stare at their enemy, that being you, a creature equipped with advanced weaponry that they cannot easily process yet.
You have only one goal, and that is for both of them to fall and only for you to remain.
But what will you achieve? A lifetime of loneliness in a vast teal-colored void with only one, or two ways out? A war without reason is only pain. There is no benefit given to any party.
But... maybe this is a message about if you are the only one left standing, that there is no conflict?

...Or maybe this is just another funny rage game project, and I have just wasted the same amount of time writing this as I have played and painfully beaten the game.

Having watched someone play this game for about a minute, I think I see what's up here, and I think I understand what the developer's intention was when it came to bringing this belated sequel into the world, where most others wouldn't dare attempt. However, merely 10 seconds into the gameplay, it became very clear to me that Mr. Tomkow didn't quite understand what made the original Chess the timeless classic that it is in our society.

The beauty of Chess - the original Chess, released on the physical plane of existence back in ~538AD - is that any bout between players can last between 30 seconds, to in excess of 20 hours. Chess 2 makes a deliberate attempt to streamline the experience, but while it may seem appealing to newcomers who find the complexity of the original Chess too daunting, it leaves the feeling of victory hollow, and unsatisfying.

Call me too old-fashioned, or unwilling to accept change, but I also have to address something I feel quite strongly about; the addition of the Duck, while endearing, clashes in a way with the existing and unchanged chess piece designs in a way that I just simply cannot ignore. The cel-shading aesthetic also feels like it was put in place with the sole intention to empower the Duck's appearance, with no regard for how it muddies and blurs the detail of the chess pieces themselves. If Mr. Tomkow felt so strongly about making the Duck look good, why even call it Chess 2 anymore? I don't recall there being any sequel to Duck (although I am less than fond of the spinoffs, such as Goose).

Overall, Chess 2 is an interesting experiment in breaking the boundaries of what can be called a sequel, but doesn't quite come close to matching the original. At the very least, much like the original (basically) is, the sequel is also completely free for anyone to try. Mildly recommended, but not remotely endorsed.

EDIT:
WAIT IT'S SINGLE PLAYER ONLY THAT'S LIKE, COMPLETELY NOT THE POINT OF CHESS HOW DID THEY MISS THAT, FUCK THIS GAME