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Parahouse. (Updated!) Shogi + Strong pieces. (9x9, Cells: 81) [All Comments] [Add Comment or Rating]
H. G. Muller wrote on 2022-05-22 UTC

For example, I don't think Shogi has an "impasse" rule. 

It actually does have such a rule. See for instance the Wikipedia article, which devotes an entire paragraph to it. Like 3-fold repetition impasse (= jishogi in Japanese) is both a game situation and a rule made to specify consequences for when that situation occurs.

It does not make much sense to have detailed explanation of rules that the variant at had does not have. One can doubt the wisdom of using Shogi as a reference. Many articles on CVP of course use orthodox Chess as a reference, and only describe how the variant they discuss deviates from it. But I think 95+% of the visitors of CVP will be quite familiar with orthodox Chess, while to most Shogi would be something as alien as Courier Chess or Metamachy. Even for Fergus, who must know 100 times more about chess variants than the average reader, the current description was not sufficiently clear.

So I would suggest to make a full rather than an incremental description of Parahouse in the Rules section. The current comparison with Shogi is then more suitable for the Notes section. This gets rid of the need to mention Pawn-drop mate and impasse, as Parahouse does not have those rules. It would have to mention that:

  • Pieces mandatorily promote when their move starts or ends within the zone
  • Pieces that are captured demote, change side, and get into the hand of the player that captures them
  • Unpromoted pieces can be dropped from the hand on an empty square, instead of a normal move.
  • Pawns cannot be dropped in a file that already contains one of the same color.
  • The game is won by checkmating or stalemating the opponent.
  • Perpetual checking is a loss for the checking player. (?)
  • Other (?) 3-fold repetitions are a loss for the player that last moved.

All in all that is not much longer than what you there is now.