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## #1 2010-02-08 10:01:31

John E. Franklin
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### Chess Knight Add 3 Sub 3

If you know how a knight
moves in chess, you might
enjoy this little matrix I
just came up with that has
subtracting the number 3.

Last edited by John E. Franklin (2010-02-08 14:07:13)

Imagine for a moment that even an earthworm may possess a love of self and a love of others.

## #2 2010-02-09 05:11:29

bobbym

Online

### Re: Chess Knight Add 3 Sub 3

Hi John;

We only have one problem here. If you take the tour 1 - 8 - 5 - 2 - 9 ? Only works if we are using modular arithmetic.

In mathematics, you don't understand things. You just get used to them.
No explanations, just DGA.
If you can not overcome with talent...overcome with effort.

## #3 2010-02-09 05:48:09

John E. Franklin
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### Re: Chess Knight Add 3 Sub 3

Yes, I'm only looking at the last digit.
Like 1 - 8 = 11 - 8 = 3

Imagine for a moment that even an earthworm may possess a love of self and a love of others.

## #4 2010-02-10 08:36:41

John E. Franklin
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### Re: Chess Knight Add 3 Sub 3

Last edited by John E. Franklin (2010-02-15 13:05:51)

Imagine for a moment that even an earthworm may possess a love of self and a love of others.

## #5 2010-02-15 12:59:51

John E. Franklin
Star Member

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### Re: Chess Knight Add 3 Sub 3

Here's something I kind of like for adding numbers together
in my head, or on paper if you come up with shortcut
drawings and dots...

By putting the zero and five at the
center points, some very
pairs of numbers together.
There are 55 adding problems we
remember as children, 36 that are
not trivial (without 1 or 0 in them).
Try them all on this for fun in
geometric groups such as diagonals,
poles, longest diagonals, doubles,
horizontal beams, 5 added to any number,
etc.