What I came up with is that a Spy may capture another by hopping over another piece on the same side. This easily works for radial moves, because the piece can be conceived as capturing like a Cannon or Vao. For Knight moves, I thought of the restriction that the Knight must jump over another piece belonging to the same player. These restrictions have the effect of making the Spy's ability to capture another piece appear as though the threat of capture is coming from another piece, which fits with the kind of sneaky, underhanded manner that I had conceived the Spy to be capturing in.
I have now updated the rules and the Game Courier preset to allow one Spy to capture another in this manner. I have tested the code by trying out various types of positions with Spies, and it seems to be working now. But due to the nature of this game, I cannot truly playtest it on my own. So I'll issue some invitations to play the game.
I have now updated the rules and the Game Courier preset to allow one Spy to capture another in this manner. I have tested the code by trying out various types of positions with Spies, and it seems to be working now. But due to the nature of this game, I cannot truly playtest it on my own. So I'll issue some invitations to play the game.