From: James Edward Gray II <james@...>
Date: 2006-12-22T03:37:24+09:00
Subject: Re: Chess960 (#106)

On Dec 21, 2006, at 11:10 AM, rik wrote:

> We're currently wondering why none of the published solutions take the
> approach of:
>
> First, place king between b to g, inclusive.
>  - Place rook on left of king.
>  - Place rook on right of king.
>  - Place bishop in empty black sqaure.
>  - Place bishop in empty white square.
>  - Fill remaining squares with knights and queen.
>
> Note that the number of permutations generated there are VASTLY  
> lowered
> as compared to the "generate everything, then throw away everything
> invalid" approach.
>
> It also seems to be the common sense approach in my office...

Well, Jamie Macey's dice rolling solution is fairly similar.  The  
order is different but it works the same.

Jamie's implementation requires even fewer decisions though, since  
three whole pieces are placed without any random maneuvering.  I  
guess, in that respect, it seems pretty "common sensical" to me.

James Edward Gray II