## basic explanation

Post the puzzle or solving technique that's causing you trouble and someone will help

### basic explanation

Hi
I've been trying to figure out what is the next move here, I know it's probably basic, but couldn't figure it out.
help?
thank you
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Posts: 6
Joined: 12 August 2013

### Re: basic explanation

http://www.thonky.com/sudoku/simple-coloring/

Posts: 6
Joined: 12 August 2013

### Re: basic explanation

This position can be easily solved using a BUG+1.

JasonLion
2017 Supporter

Posts: 640
Joined: 25 October 2007
Location: Silver Spring, MD, USA

### Re: basic explanation

thanks for explaining in a simple manner.
starstories

Posts: 3
Joined: 17 June 2014

### Re: basic explanation

if BUG technique is too esoteric, a little XY chain suffices:

(5=4)r5c1 - (4=1)r5c9 - (1=4)r6c8 - (4=1)r3c8 - (1=5)r3c5 => r3c1 <> 5

Which translates as:
if the 5 at r5c1 is true, then the 5 at r3c1is false
if the 5 at r5c1 is false, then the 5 at r3c5 is true, therefore the 5 at r3c1 is false
either way, the 5 at r3c1 must be false and can be removed.

Phil
pjb
2014 Supporter

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Location: Sydney, Australia