| Adak
| Joined: 27 Feb 2008 | Posts: 87 | : | | Items |
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Posted: Tue Jan 13, 2009 11:26 pm Post subject: Why is Box 1 filled in? |
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I've seen a lot of canonical or normalized grids, shown with the top left box already filled in:
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123|
456|
789|
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Papers about Sudoku grids, and normalizing them, also show this; Jarvis and Russell, among others.
Yet when I look at Gordon's 17's, etc., he has his grids in row minimized order, and the top left hand box is nearly all zero's. This makes sense to me, since now we're basically referring to the grid, as though it were a huge 81 number integer.
Then, is the first box being filled more for illustration purposes? Something to help the author show how the grids can be canonicalized easier? |
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