It looks like all the pieces are chopped-off fingers while the rook is something else. Perhaps it represents the mechanism that chops off the digits. Can anyone shed some light on what message this chess set is trying to convey?

I just finished reading The Chess Artist by J.C. Hallman. Although a bit longish, I enjoyed it. The excursion Hallman and his compadre (Glenn Umstead) took to Kalmykia seemed to take up the entire book ... or maybe the book just dragged on during that part. But the parts I enjoyed most were the chapters about the history of chess and how the pieces came to be today as well as all the other chess adventures Hallman and Glenn took (click here to see a picture of the two).
of the knight and the bishop. Before the piece came to be represented by the figure of a crenelated castle tower, a depiction that appeared between 1524 and 1550, the rook was often portrayed as a two-headed shape. Early carvings of both bishops and knights were upright figures with some kind of aslant protuberance; early rooks had two such projections. In ornate sets it was a knight with two horse heads instead of one."I'm a big JoePa fan. I found this recent quote from him:
“In checkers, every checker can do the same thing,” he said. “Chess, the king can do one thing, the pawn can do another thing, the whole bit. Football and coaching is (determining) who's the pawn? Who's the king? So you can put them all together. ... I don't have any reservations about playing a freshman. ... When I say to a kid, 'Hey, get ready to get knocked on your rear end,' I also tell him, 'Learn. Learn why you got knocked on your rear end, so when you come out to practice the next day, they're not going to knock you on your rear end the same way. And you've got a chance to knock him on his rear end.' There's no hard-and-fast rules. We've got a bunch of kids coming in, we're going to work our butts off to see how good they can be, and how much we can help them be good. We've got to put the combination together that gives us the best chess board.” (Source: http://pennstate.scout.com/2/867965.html)

board vision in itself is only interesting if you want to play without a board. Which I don't. In a real game there is a real board, so there is no need for perfectboard vision. (allthough it is fun in itself)