Mock Test 14 will be on 28-Feb

Instruction Booklet available at here

Nice! Who is creating the puzzles?

There will be two parts
Part 1 by TTHsieh and Minfang Lin (mostly all Classic)
Part 2 by Oddest (mostly Standard Variations)

Last time when they created the mock for us, there was nice Chinese poem. Lets see what is there this time.

cool :) is it going to be 24 hrs like this one?

@Himani,
Why didnt you give our Mock Test?

Instruction booklet uploaded here

After a very tough Mock13, we'll have Mock14 this weekend. There will be 2 Rounds consisting of Classics and Variations respectively.

Visit http://logicmastersindia.com/mock14 for details about timing and to download the booklets.

We hope you will enjoy Mock14 which is designed by our friends TTHsieh, Leaf Card and Oddest

Hi,

I want to ask something. In the instruction booklet it is stated that we have 50 minutes solving time for round1 and then 20 minutes resting time and at last another 50 minutes to solve round 2 which sums up to 120 minutes. From this statement I understand that a puzzler is only allowed to start round 2 just after 70 minutes passed from he clicked start round 1 button. Will start round 2 button be disabled during this 70 minutes. I think it should be. Because other way one may click it to deal more with round 2 puzzles including the variants not the classics. Or he/she may click this button before the completion of 20 minutes resting period which leads to an advantage among other puzzlers. I just wanted to clearify this point. Thanks for the competition,

Zafer

hello,zhergan
the "start round 2" buttom will available after 70 mins from you click "start round 1", if you don't start round 1,round 2 will not available.

Short Answer - Start Round2 button will be disabled until 70 minutes are passed after Round1 started.

Here is what will happen exactly -

Before the mock starts (8PM IST 27-Feb) -> Round1, Round2 disabled

After mock start (after 8PM IST 27-Feb) -> Round1 enabled, Round2 disabled

After you start taking Round1 till first 50 minutes -> Round1 enabled, Round2 disabled

between 50 minutes and 70 minutes -> Round1 disabled, Round2 disabled

after 70 minutes -> Round1 disabled, Round2 enabled

after 120 minutes -> Round1 enabled, Round2 enabled, but you can't submit the answer

after mock ends (8pm IST 28-Feb) -> Round1 enabled, Round2 enabled, but you can't submit the answer

Show Examples will be enabled all the time.

Hope it is clear to everyone.

Also, even if you finish round1 before 50 minutes, you can start Round2 only 70 minutes after your started round1.

So for example, if you finish all the sudokus in Round1 in 40 minutes after you started Round1, you have to wait for 10+20=30 minutes to start round2.


Also, during the 20 minutes break while you are waiting for Round2, you can click on the 'Refresh' button next to 'Show examples' to see how much time is left. Once 20 minutes is over, 'Start Round2' button will be enabled.

Thanks for the explanation:)

Regards,

Zafer

I suggest that the next time you have a multi-round mock test like this one, you treat the two rounds independently, so one can do one round early in the day and do the other round late in the day. There's no real reason not to have this flexibility given the "any time mock" system. It's not immediately apparent that the two rounds have to be taken together.

i have a doubt

lets say i take the mock today with a username.which means i have all the puzzles with me.
and what if i login tmmrw with another ID and submit the answers.this way it looks like i have finished all the puzzles when i login the second time

have a doubt

lets say i take the mock today with a username.which means i have all the puzzles with me.
and what if i login tmmrw with another ID and submit the answers.this way it looks like i have finished all the puzzles when i login the second time

i don't intend to do this but what if somebody does it like this

I started Round1 but (even after many refreshes) don't get page with the flash puzzles to enter answers... Any idea what's wrong? Thx

OK, used Chrome and it works there... lost couple of minutes, sigh. :(

Chris, whatever you mentioned about multiple rounds is definitely the best one.

Here is my personal opinion :-
First of all, I don't like multiple rounds, when it is Online. Players who solve on paper always loose time because of pdf password, printing etc.
I would always prefer a single longer round than multiple smaller rounds.

thank you for all players who participated in mock test 14 :)
for someone metioned why it has two rounds, the two rounds are designed by different people, it's difficult to calculate bouns if we put all puzzles together. at first, i only want to a mock test with classic sudoku, but i also know many players want to solve variants, so i ask another one to do variants. we want the test in 2 hours because it's better to test players ability in classic and variants, sustained attention in two 2 hours. Deb metioned printing, in my opinion, every player will spend time to print, it's fair. our original intention is everyone will enjoy our puzzles, and harvest by playing our puzzles, i will analysis round 1 after the test end.

These 'Mock Tests' provide opportunities to players to solve Sudokus in a time-constraint-ed environment. This will only help them in 'Actual' competitions.

With 'Any Time Mock', players can find ways to cheat the system, but in reality they will be cheating themselves.

I think there is a grid without solution ....

I do it 3 times and each time, there was a contradiction wich prevented me from continuing the resolution... :(

Fred

Edited by Fred76 2010-02-28 6:40 PM

Fred, which grid are you referring to?

I suppose it is XV. My solution was accepted, but there is one missing V sign between r1c1 and r2c1.

Average Sudoku

Average Sudoku did not have a unique solution:

324 157 698
615 298 734
987 364 125
241 689 573
536 742 981
879 513 246
193 425 867
762 831 459
458 976 312

4 & 8 in Boxes 8 & 9 can be interchanged among themselves.

Please correct me if I am wrong.

Yes, it was on the XV grid... I had a 3 in r1c1 or r2c1 then 2 could not be in r1c1or r2c1, so I put the 2 r1c3 or r3c3, then I can not finish the grid....

And on average sudoku I thought there were 2 solutions, too...

Fred

it's my fault lost a "v" in vx sudoku, i'm very sorry to all.
the answer of average is
324157698
615298734
987364125
142689573
536742981
879513246
763825419
291436857
458971362
in the rule"The cell which value is the average of two cells aside marked with a line.", so if there's no line, it can't be average of two cells.

On the 7th line ... 2-5-8 would mean, that there is horizontal line over 5. So they can't be this way, only the other position is correct.

R7C7 can't be 8 because R7C6 = 5, and R7C5 = 2

oups you're right :) , I had chance to choose the right solution on this grid :bleh:

Fred

That was one tough set of sudokus !!
I liked the fact that the puzzles were all logically solvable (at least the ones that I was able to solve in the given duration)

There could have been more time allotted for both rounds.
I managed to solve only 3 in the variations round, solving a fourth consecutive just after the time was over.
It was a little sad that I wasn't able to try some of the cool sudoku like the Average Sudoku which has a neat set of logic involved.

It is very easy to miss an X or a V while making a puzzle like Sudoku XV, however it does distract the solvers and we need to formulate a process to avoid such errors in the mock tests in the future.
I will start another thread to discuss some of the possible ideas.

maybe because of the missing in vx sudoku, all the reply above are discussing variants, could you give me some reply for classic sudoku. like we metion in IB, all the puzzles are low level technology, 1-6 solvable by singles, 7 solvable by pointing, others need pair triplet and xwing, introduced in many japanese sudoku books. and we alse do some work on guessing part for 7-10.
let me show you the analysis by sudoku explainer(a sudoku analysis software)
Analyzing Sudoku #1
59 Hidden Single
Hardest technique: Hidden Single
Difficulty: 1.2

Analyzing Sudoku #2
57 Hidden Single
Hardest technique: Hidden Single
Difficulty: 1.5

Analyzing Sudoku #3
57 Hidden Single
Hardest technique: Hidden Single
Difficulty: 1.5

Analyzing Sudoku #4
51 Hidden Single
5 Direct Hidden Pair
1 Naked Single
Hardest technique: Naked Single
Difficulty: 2.3

Analyzing Sudoku #5
50 Hidden Single
3 Direct Hidden Pair
4 Naked Single
Hardest technique: Naked Single
Difficulty: 2.3

Analyzing Sudoku #6
50 Hidden Single
1 Direct Pointing
3 Direct Hidden Pair
3 Naked Single
Hardest technique: Naked Single
Difficulty: 2.3

Analyzing Sudoku #7
48 Hidden Single
1 Direct Pointing
6 Direct Hidden Pair
2 Direct Hidden Triplet
4 Pointing
Hardest technique: Pointing
Difficulty: 2.6

Analyzing Sudoku #8
51 Hidden Single
4 Direct Hidden Pair
2 Naked Single
4 Pointing
1 Claiming
2 Naked Pair
1 X-Wing
Hardest technique: X-Wing
Difficulty: 3.2

Analyzing Sudoku #9
53 Hidden Single
2 Direct Hidden Pair
1 Naked Single
1 Direct Hidden Triplet
6 Pointing
1 Claiming
1 Hidden Pair
1 Naked Triplet
Hardest technique: Naked Triplet
Difficulty: 3.6

Analyzing Sudoku #10
57 Hidden Single
1 Direct Hidden Pair
1 Direct Hidden Triplet
12 Pointing
2 Claiming
9 Naked Pair
Hardest technique: Naked Pair
Difficulty: 3.0

we know players like to get more score puzzles first, so we put the puzzle seems easier at last with high score. compare with your step and analysis, maybe you will have a new feeling with the ten puzzles, and i wonder someone can tell us your feeling, or you solve time for every puzzle, if all puzzles according with the theme metioned in IB, or something you want to tell us. thank you! :)

Thanks for correcting me. I thought that the converse might not be true, so I didn't check for that.

Thanks for the awesome analysis. Nice way to rate the classics.

I think all the techniques that you have used are absolutely acceptable in competitive sudokus. These techniques can be identified by participants without breaking their head too much or being tempted to resort to trial and error. :)

score / Results has been updated to show the split between Round1 and Round2.

Couple of observations
1. The average score in Round1 is much higher than average score in Round2. So, probably Round2 should have been longer.
2. Many players didn't attempt Round2. (so, either many players are just interested in Classics OR some players gave up after finding Round1 little tough)

Only Zafer completed Round1 with 4 minutes of bonus time. So really a good show from considering many other good players solved only 5-7 in Round1

As already noted, scores in this mock are very low, implying that the test became tougher than it was perhaps planned by the organisers. We can perhaps infer that two short 50 minute formats can work well in an offline competition, but it is not optimal for online contests.

Round 1: Two contestants completed all 10. So timing wise, it was planned ok. If we use the grades from scanraid, we arrive at the following:

1 119 moderate
2 126 moderate
3 101 moderate
4 82 moderate
5 106 moderate
6 84 moderate
7 154 tough
8 306 tough
9 166 tough
10 194 tough

I am not sure about the accuracy of this system but this does imply that the 20 pointer was tougher than the 40 and 50 pointers. And the 90 pointer was not tougher than the 70 pointer. In fact, classic 8 was attempted by the least number of contestants (another reason could be that it is difficult to reach to number 8, whether you start from 1 or 10). But overall, the points distibution was good as all "moderate"s had less points than "tough"s.

Round II: Consecutive sudoku was nice with logical steps needed to proceed. Thats the only one I can comment on since I got stuck in most others I tried, and solved diagonal the hard way. Here, we probably tried to fit in more sudokus than the alloted time. In 50 minutes, 5 or 6 sudokus (of the level in the mock) would have been perfect. The main regret is that most participants were unable to even try out a majority of sudokus.

Another reason for people skipping round 2 could be the rigid "20 minute gap" constraint between the rounds. If the two rounds were independent, we would have seen more scores in round 2.

I had some informatic problems during round 1 so I could try only the easier puzzles, which were very pleasant to solve. I think 50' was a good timing for this round.

Then I tried round 2 but did mistake on mistake and so I decided to stop playing and relax. :bleh:

I came back on the puzzles later, and my impression is that puzzles were globally hard, and some really tough. It would have been great to have the round last about one hour and a half.

Finally, the 20' break between the two rounds didn't bother me.

I would be a bit careful about relying on scanraid ratings for human solving. It doesn't seem to correspond too well with actual testing. For example, see Nick Baxter's remarks about the USSC puzzles here (and from direct experience, the 3rd puzzle of the third round was pretty much the toughest one of the bunch).

I agree with this, Scanraid's ratings are sometimes far away from what we could expect. Of course every software will sometimes deliver "strange" scores according to us, but Sudoku Explainer is generally considered more reliable. Anyway I didn't try the tough puzzles yet, so I can't tell about my own experience...