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#1 2007-06-11 22:02:12

forsmarts
Administrator
From: Minsk
Registered: 2007-05-29
Posts: 195
Website

Solving "Different neighbours"

Fill the grid with numbers from 1 to 4, so that cells with the same numbers do not touch each other, not even diagonally.

http://www.forsmarts.com/forum/img/puzzles/diffnei01.gif

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#2 2007-06-11 22:17:04

forsmarts
Administrator
From: Minsk
Registered: 2007-05-29
Posts: 195
Website

Re: Solving "Different neighbours"

I won't comment this solution process a lot. I just say that the main idea of my method is to watch 4-cells areas in which there are not many options. I mark those areas by dots in the middle.

http://www.forsmarts.com/forum/img/puzzles/diffnei01a.gif

http://www.forsmarts.com/forum/img/puzzles/diffnei01b.gif

http://www.forsmarts.com/forum/img/puzzles/diffnei01c.gif

http://www.forsmarts.com/forum/img/puzzles/diffnei01d.gif

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