Chess on an Infinite Plane
Good ideas on castling. I like the idea of "guarding". Another possible way to use the guard is to let him just stay there. After clearing other pieces, the king jumps on the other side of the guard, and the rook moves inward. I believe @evert823 once said the guard is a good king defender. It's very maneuverable (same as king) but since he isn't worth too much he can easily give his life (be exchanged) for defending the king. Something like this:
So infinity+8=infinity.
The more you know...
I quite like that long castling round the guard, too.
I have been thinking this through, from a different pov. Why was the castling rule brought into chess? Because players were taking a few moves to position the king to safety, and it was seen as a good way to speed up the opening.
Perhaps we should wait until there's a reasonable sample of games to take a look at, and see where the safest square(s) for the king seems to be. That should be where the king should aim for, and therefore castling, or whatever it ends up being called, should be designed with this in mind. It should all be about getting the king to an ideal square quickly, just like the castling rule when it was introduced into classical chess.
I do like the idea of the king moving next to a guard, because the guard does seem like the most defensive piece in the opening, so it's natural for people to want to move them near their king.
So infinity+8=infinity.
The more you know...
Yep, this is true, and therefore infinity - 8 = infinity.
Btw, I made this diagram to help understand the power of the hawk. The hawk is a jumper, so it's good to compare it to the knight. The hawk attacks 16 squares, which is twice what the knight attacks (8). So it could be estimated to have about twice the value of a knight, or about 6 points.
But since it starts far-back, its power isn't immediately apparent. Some tempo are lost to get the hawk into play (and also for the opponent to attack it).
Also, H.G. Muller who studies this type of thing has made estimates for different types of jumpers. If I remember correctly, a jumping piece which attacks 16 "nearby" squares has a value even slightly more than two knights - maybe around 6.5 (not sure exactly).
The grasshopper is used in grasshopper chess. It captures by jumping over other pieces. Here's an example board: