In Knight Sudoku, would a solution in which there was more than one knight digit be invalid?

Thank you,

David McNeill.

In the puzzle, ONLY ONE POSSIBLE SOLUTION of the knight exists.
As in, you cannot have two numbers, both of whom are knights.

Rohan.

IMPORTANT NOTES:

1. One additional rule in Battleship Sudoku: "Given numbers are NOT part of any ship". (It has been added in the PB)

2. Regarding submission of Minesweeper Sudoku: For mines, you can enter 'X' OR 'M' OR '5' & '6'. Even if you leave the mines as empty-cells and fill up the numbers 1 to 4 correctly, you will be given full points.

3. Since there are 6 groups of 7 sudokus each, on the submission page, there are 6 tabs. You need to click on the tab to select a group OR on the Next button which will take you to the next group. As long as you do not close the browser, you can visit any group at any time and submit the answers of any sudoku.
These tab buttons and next button are present at the top and also at the bottom.

4. The 'Move As You Type' and 'Colour Drop Down Box' is present at the top-right and at bottom-right.

5. The points distribution give a general idea of the difficulty of the puzzles, though may not be perfectly accurate. We are expecting solvers to finish all puzzles in 140mins, even though some of the high-point puzzles are tough and might require guesswork.

Password protected Sudoku Booklet is uploaded

For those who solve online:

It is advised to solve Battleship Sudoku and Minesweeper Sudoku on paper as you 'may' find it difficult to do them online.

Rohan.

SPEED SIXES has started
Enjoy the Sudokus

I didnot understand Distances Sudoku of Group 4. In the given example in IB, if we take x=4, then the distance between 4&5 and 3&4 is same.

Please help me.

Aditya, check the distances in the shaded cells.
In the shaded cells, d(4,5) > d(3,4)

In the actual puzzle, 6 cells will be shaded. You also have to put 1-6 in the shaded cells. There may or may not hints given inside those 6 cells.

For the original distances Puzzle check http://rohanrao.blogspot.com/2009/05/rules-of-distances.html

I am still not able to get it. I have understood that the rule for distances will only be applicable for the shaded cells.

The problem is with this sentence. "Distances between numbers are measured from the centres of the cells." I am not able to interpret the meaning of this sentence.

Edited by adityasaraf007 2010-06-05 8:05 PM

How do you measure the distance between two numbers or two cells?
for example distance between R1C1 and R3C5 is sqrt of (2*2+4*4)

Now, its clear. Thanks for your reply.
I thought to calculate the distance, we need to follow the path of the cells.

Please take some time out and rate the puzzles after you finish the test.
Well, if you're not upto rating '42' puzzles, you can definitely give me some feedback here itself :-)

Tejal/Rohan.

Thumbs up to the organizers! Very nice puzzles! I enjoy this competition a lot. On the puzzles that I finished the score corresponded to their difficulty prety well. On one or two puzzles I had to guess (or at least it was faster than trying to come with some strange technique ). I am definitely looking forward to the next competition. Thanks.

Edited by radekivv 2010-06-06 10:39 PM

Very nice set of puzzles. A lot of different types and difficulties.
Battleship, DescriptivePair, 3rd & 5th surprise, Irregular are my favourites from this contest.
Congratulations to puzzle makers, excellent job.

Branko

Thanks a lot Radek and Branko.
'We' are glad you enjoyed the puzzles :-)

Tejal Phatak / Rohan Rao.

Hello everyone . I am new to this site. This is the first time i have played the puzzle. although my score is 198 , i enjoyed a lot.

Congrats to Nikola Zivanovic for topping the test. An exceptional performance by finishing all puzzles in 129mins.
Congrats to Hideaki Jo too, for being the only other participant who completed all puzzles. He saw soo many '6's, he decided to get 6mins time bonus too ;-)
Congrats to Jakub Ondrousek for solving 40/42. He made silly mistakes else he too wouldv'e got time bonus.

All in all, thanks to all participants for participating in the test and hope you enjoyed the puzzles. Do rate the puzzles or give me feedback here.

Looking forward for more in future.

Tejal/Rohan.

This test was so long for 166 mins, and in our area we have frequent loadshedding. I knew that there would be loadshedding during the mock. The electricity went off after about 80 mins from the start of test, and came back just after 10 mins of the finish.

Had I been able to submit the answers, my score would have been 803.

Thanks to Tejal and Rohan for this test. It was lot of fun solving the 6*6 puzzles.


I would like to make one request. Please keep the duration of the tests short - maybe around 90 mins. Otherwise I am sure I would miss to submit the answers of the coming mocks as well.

Rohan and Tejal, bravo for the puzzles! I solved all in 115 minutes and spent 14 minutes more on typing. I can not wait of July test.

Thank You very much parsurulz/adityasaraf/Nikola.
Nikola, it was a fantastic performance by you. I was expecting at least one person to finish within 135mins (including typing answers) and you proved me correct :-)

@Aditya
This test was longer than usual, but it was based on a nice theme and suited well. Future tests will definitely be of lesser time.

Phenomenal performance by Nikola. I'm glad I competed even though there wasn't enough time left. Some of the puzzles took a long time to solve. Battleship Sudoku was tough, as expected. However, I also spent a very long time on Sequence Sudoku. Anyone got any nice logic for solving this one?

Hope to rate the puzzles soon.

Thanks Rohan. Good fun.

David McNeill.

Aditya,
The future Monthly tests will not be this long.
We'll be having max 120 minutes.
Top solvers should be able to solve most puzzles in 80 minutes, and average solvers in 120 minutes.

@David
Thanks a lot :-)
Sequence was so easy! (The 6-cell sequence on the left has to have R2C1 = '1'. If you put R2C1 = '6', you will get stuck with R6C1. For the other 6-cell sequence, R5C5 cannot be '6' since '6' will be present either in R5C2 or R5C3. So, R5C5 is '1'. Then finish it! )

@All
Solution Booklet has been uploaded. You can download and check the solutions.

Thanks for this wonderful tournament !

It was a very nice concept. You had to know lot of variants to be in a good place.
Perhaps it was a little bit too long, but it was interesting to see how I can continue to be concentrated after 2 hours.

I'm glad to see so many participants and very happy to be in the top 10. I should have better prepared some puzzles to be in my top form (like perfect cube, perfect square and distances sudoku, which were not so tough, but I could not solve them during test).

It was interesting to see some tough 6*6 puzzles, and I like the fact there was a wide range of difficulty.

Thanks !

Fred

Thanks for a great contest!

I have a question about "EQUAL SUM SUDOKU" in Group2.
Solution in "Solution Booklet" seems invalid since
3+3=2+4 holds in R4R5C2C3. Does this puzzle have a solution?

Hideaki Jo