The New Sudoku Players' Forum

[nadav3]

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

[nadav3]

ok, just read about simple coloring, that explained it.
http://www.thonky.com/sudoku/simple-coloring/

[JasonLion]

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

[starstories]

thanks for explaining in a simple manner.

[pjb]

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