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Dave wrote on Wed, Jan 24, 2007 05:33 AM UTC:Average ★★★

The Chess 480 castling rules are based on some false assumptions. The original purpose of castling is not to just move the king two squares to the right, or three squares to the left and connect the rooks. The impetus for castling is to secure saftey of your king, and allow you to carry out other operations on the board with (hopefully) a safe king position (and connect the rooks too, yes). The most important point is that we are removing the king from the centre of the board by castling. In Chess 960 we are always able to vacate from the centre to either wing, Chess 480 however, does not always allow this. Rather than Chess 960 castling being arbitrary, it is the 480 castling rules that are arbitrary and do not apply well to the logic of a chess game.

'Castling This is a move of the King and either Rook of the same colour on the same rank, counting as a single move of the King and executed as follows: the King is transferred from its original square two squares towards the Rook, then that Rook is transferred to the square the King has just crossed.'

Yes that is true, but it only applies to the case where the king is starting on e1 (ie regular chess). Let's take an example position of king starting on g1. In Chess 960 we have the option of castling 'h' side (staying on that flank) or 'a' side, finding safety on that side of the board. We can have opposite castling games, same side castling, or no castling if it is appropriate, just like normal chess. In Chess 480 we find ourselves with the grim options of either castling 'h' side, or castling directly onto the e file! I hope you can see how undesirable this could be when many chess games revolve around control of the centre by pawn occupation, thus the e file could be likely be opened. It is not a sensible or safe castling destination!

'It seems that simplification of the castling rules for Chess960 could help promote the game for beginners, streamline the rules and reconnect the game with it's historical roots.'

Creating a variant where players castle into the often volatile centre of the board does not reconnect the game with its roots, it strays. The Chess 480 castling rules appear to break the true intention of castling. If 960 castling is to be explained to a beginner, it is easy to say you always castle to either g1 or c1. Why these squares they ask? The centre of the board is often unsafe.


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