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Difficulty: Expert Monday, October 9, 2017

Not Completed Play This Puzzle

CHAT LOG for Monday, October 9, 2017

12:27 am
JeffysMom

Done. 2 guesses.
12:53 am
WHB

Started over, two guesses
1:46 am
Phil

Quite right fizz but, expert today! Back to it
1:47 am
Phil

Except its Monday where I am! So I'm doing yesterdays first!
2:27 am
Phil

done yesterdays, 2nd guess
2:27 am
Phil

start todays
3:44 am
MrOoijer

g/g
5:46 am
tincup

done... solved like an easy
9:04 am
spellacked

yeah, how was that an Expert? I didn't see anything tricky at all, not even a UR.
1:01 pm
m9f9l

What is a UR?
2:26 pm
TallMike

UR = unique rectangle. A solving technique which relies on avoiding a pattern of numbers which would imply that the puzzle has more than one solution.
5:39 pm
JudyHall

I'd never heard of UR (= unique rectangle) either, m9f9l, and I was uncertain after reading TallMike's comment, so found a link that gave me a clearer understanding. http://www.sudokuwiki.org/Unique_Rectangles