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CHAT LOG for Friday, April 29, 2016

12:34 am
JeffysMom

Done.
12:43 am
KnightTime

I may or may not have solved the puzzle. If I did I may or may not have used any of a number of approved and/or frowned upon techniques. In fact, there is a possibility I used a solving program and just copied the answers in.
4:45 am
angieplumptit

Now let's spend a day or two getting "ezpz" straightened away.
5:14 am
tincup

done
7:18 am
Diane

I don't typically announce how I solve a puzzle. For the record: If I have time on my hands, I always try no green. If I'm more in a hurry, I use greens without hesitation. I often guess on experts (again, that time thing), but solve as far as I can, then try to find the most logical guess (I prefer a 50-50 guess, for example, to a 1/3 guess). AIC is (again, in my opinion) little more than a guess But folks, it's a game.
8:15 am
WHB

go
8:30 am
WHB

Done
9:14 am
drwho

Difficulty score 23. No green. No red. No wrong guesses.
9:27 am
drwho

Tall Mike: expert puzzles usually require looking ahead several steps to eliminate a few possibilities in your approach #1. Easy, Medium and Hard puzzles can be solved by techniques that don't require any looking ahead to eliminate possibilities. Using green helps you keep track of the remaining possibilities.
9:33 am
drwho

Approach #2 is basically trying out the possibilities until you find one that works. Of course no one tries ALL the possibilities, we eliminate them as soon as we can to save work.
9:36 am
drwho

If in looking ahead to try to eliminate possibilities you stumble on a solution that works you can quit. But if you do, while you have a solution to the puzzle, you don't know if it is the only solution. You are taking that by faith, because legitimate Sudoku puzzle are supposed to only have 1 solution.
9:38 am
drwho

If you stick with your approach #1, then you can be sure that if you find a solution that way, it is the 1 and only possible solution to the puzzle.
9:51 am
drwho

When I first started announcing I didn't use green to solve a puzzle, it usually meant the puzzle must have been really easy because I wasn't very good at solving them then. Now I usually don't need green. So the no green comments document how my Sudoku solving skills have progressed.
9:56 am
drwho

Some people announce Go ... Done, thereby documenting the time it took them to solve the puzzle.
9:57 am
TallMike

I agree with you drwho that greens help a player to keep track of possibilities, and that many of us use the single solution guarantee as a short-cut. But the guarantee is there, so I personally choose to make use of it. It might be interesting to work on puzzles which may have more than one solution, but I have not discovered a forum for that yet.

Back to the central topic. The more I push my memory the less I need greens. Some experts do not even become a challenge until the end game, and both of the approaches I have described can be implemented without using greens. What I am trying to argue is the total validity of using approach # 2 under those circumstances. It then becomes a somewhat arbitrary personal choice as to whether you look for a solution by small increments or a solution by elimination of impossible outcomes. Either can be done in your head with no greens, reds, side notes, coloring chains, etc. I suspect that other players do this too but wrongly feel that they are guessing if they use approach # 2.
9:57 am
drwho

So green, no green; guesses, no guesses; fast or slow; whatever makes this fun for you do it. That's the point, have fun.
10:02 am
drwho

Tall Mike: I agree that approach #2 is valid, if you think it is :). Whatever makes the puzzle a challenge to you is fine. The definition of what guessing is is rather subjective. I have a few comments on guessing at my website at the bottom of the page about my solver program. if you are interested.
1:34 pm
UnikeTheHunter

2:09 pm
Doll414

go
2:18 pm
Doll414

done, ng
2:29 pm
helenkeller

go
2:36 pm
helenkeller

done
10:55 pm
Andy

Done
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