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Tree garden chess. Large chess variant on 10 by 10 board with 4 by 4 area missing from the middle. (10x10, Cells: 84) [All Comments] [Add Comment or Rating]

William Overington wrote on Wed, Sep 25, 2002 06:46 AM UTC:

> Question on castling (and championing and centauring): You can only
castle if your 'king has not been checked at any previous time in that
game' -- by 'previous' do you mean to exclude the current time? That is,
are you allowed to castle while in check in this game?

My intention was that castling, championing and centauring would be as
near as possible in meaning to castling in ordinary chess, with due
allowance for the different size of board, and, for championing and
centauring, also with due allowance for the different pieces.

So, although I did not state it explicitly, my intention was that
castling, championing and centauring could not take place if the king is
in check.

> There is nothing in the rules prohibiting moving the king across an
attacked square while castling, so I assume that's legal here.

Well, it is true that there is nothing in the rules as published, yet my
intention was that castling, championing and centauring would be as near
as possible to castling in ordinary chess, so, from that standpoint, the
king could not move across an attacked square and could not end up upon an
attacked square.

I accept that my rules were not clear on this and, indeed, that they were
capable of giving a wrong indication.

However, I now update the rules to specify the above.

Please update the following statement.

Each side may only use castling, championing or centauring once in any one
game and provided that the king has not been checked at any previous time
in that game and provided that both the king and the participating piece
have not moved previously during the game.

So as to become as follows.

Each side may only use castling, championing or centauring once in any one
game and provided that the king has not been checked at any previous time
in that game and provided that both the king and the participating piece
have not moved previously during the game.  Castling, championing and
centauring may only take place if the king is not in check at the start of
the process, does not pass across a square which is under attack and does
not end upon a square which is under attack.