Single Comment

It's a tough game. You might want a null move available. The one game I played, against Graeme Neatham, I was in a constant state of panic. In a circular game, pieces can come at you from too many directions to be relaxed about your play. One thing about the picture, I recognize the pieces. I have several of those specific small analysis sets - the tops of the rooks and the simple shape of the knight, especially around the ears, are all but diagnostic of the set. 

There aren't a lot of actual circular gameboards besides the one for Byzantine Chess. However, a very interesting circular game is found in One Ring Chess, by LL Smith.