Thread - Prime Exotica - LMI Jan 2011 Sudoku Test

@ 2011-01-14 5:14 PM (#3171 - in reply to #3168) (#3171) Top

Posts: 18

Country : France

caudmont posted @ 2011-01-14 5:14 PM

rakesh_rai - 2011-01-14 9:47 AM

caudmont - 2011-01-14 2:20 AM

DNA : would the sum of cell A in orange strand and the same cell A in blue strand equal 10 ?

That is a good question. I would repeat the relevant portion of the rules: "The sum of all corresponding numbers in the two strands is 10 (6 in the example)." - I hope you would have got your answer.

Thanks

@ 2011-01-14 5:59 PM (#3173 - in reply to #3146) (#3173) Top

akash.doulani

Posts: 157

Country : India

akash.doulani posted @ 2011-01-14 5:59 PM

one question regarding tennisdoku. in a situation where the set is given as 1:0 , does the first number have to be greater than the second one or it could be both ways ?

@ 2011-01-14 6:10 PM (#3174 - in reply to #3173) (#3174) Top

rakesh_rai

Posts: 774

Country : India

rakesh_rai posted @ 2011-01-14 6:10 PM

akash.doulani - 2011-01-14 5:59 PMone question regarding tennisdoku. in a situation where the set is given as 1:0 , does the first number have to be greater than the second one or it could be both ways ?

Thanks for asking this question, Akash.

In a "x:y" situation, x is the number of sets won and y is the number of sets lost. So, a "1:0" means 1 set won and 0 sets lost. And a set can be won in many ways: 6-1, 6-2, 6-3, 6-4, 7-5, 7-6, 8-6 and 9-7. so the two cells in question will have one of these "final scores".

To answer your question precisely, the answer is Yes. For a "1:0" situation, the first number has to be greater than the second one. I hope this helps clarify your doubt.

@ 2011-01-14 8:07 PM (#3175 - in reply to #3146) (#3175) Top

purifire

Posts: 460

Country : India

purifire posted @ 2011-01-14 8:07 PM

Very Interesting sudokus... nice twists Rakesh... Looking forward to the test.... :)

ps. Thanks for letting me know my numerological number

Rishi

@ 2011-01-14 8:25 PM (#3176 - in reply to #3146) (#3176) Top

akash.doulani

Posts: 157

Country : India

akash.doulani posted @ 2011-01-14 8:25 PM

will the clues(i.e the numbers that appear in each type ) be given for poker sudoku or we will have to find out the numbers ourselves?

@ 2011-01-14 9:30 PM (#3177 - in reply to #3176) (#3177) Top

rakesh_rai

Posts: 774

Country : India

rakesh_rai posted @ 2011-01-14 9:30 PM

akash.doulani - 2011-01-14 8:25 PM

will the clues(i.e the numbers that appear in each type ) be given for poker sudoku or we will have to find out the numbers ourselves?

Akash: This is mentioned clearly in the IB.

"The repeating number in three of a kind/ four of a kind will be given. For full house, two numbers will be given, one of which will form a “pair” and the other will represent “three of a kind”. For Two pair, again two numbers will be given, both of which will form “pair”. For sequence, the first and last number will be given as clues."

So you do not have to find out the numbers. With the given clues, you'll probably need to find out which hand type will be on which line.

@ 2011-01-16 3:32 AM (#3180 - in reply to #3146) (#3180) Top

Para

Posts: 315

Country : The Netherlands

Para posted @ 2011-01-16 3:32 AM

For Prime Number sudoku, are we provided with a list of prime numbers made up of different digits? Because to be honest I don't know all prime numbers by head between 1 and 9 digits (I don't even know them past 2 digits), or be able to figure out if for example 7142957 (which is) or 7148563(which isn't) is a prime or not on the spot. Becaused the file I found to confirm if these numbers were or weren't, contains 1 million numbers. And I don't exactly feel like sorting through it to filter out all primes that only contain different digits, just for the sake of being able to solve the sudoku.

@ 2011-01-16 12:02 PM (#3182 - in reply to #3177) (#3182) Top

purifire

Posts: 460

Country : India

purifire posted @ 2011-01-16 12:02 PM

In the Numerologidoku, can the resultant number be flipped. as in example you mentioned that when I add up the letters I get 63. So is only 63 to be used or it can be flipped to 36?

Rishi

@ 2011-01-16 3:22 PM (#3185 - in reply to #3182) (#3185) Top

rakesh_rai

Posts: 774

Country : India

rakesh_rai posted @ 2011-01-16 3:22 PM

purifire - 2011-01-16 12:02 PM

In the Numerologidoku, can the resultant number be flipped. as in example you mentioned that when I add up the letters I get 63. So is only 63 to be used or it can be flipped to 36?

Rishi: Flipping is not allowed. (also because this is not the FLIP LMI Test

)

As mentioned in the IB, All “clue numbers” in the shaded cells read from left to right. - without flipping. So, if one of the clues is RISHI, we'll have to fill 63 in two consecutive shaded cells in the same row, reading left to right.

@ 2011-01-16 3:41 PM (#3186 - in reply to #3180) (#3186) Top

rakesh_rai

Posts: 774

Country : India

rakesh_rai posted @ 2011-01-16 3:41 PM

Para: I was expecting this query and I'm glad you asked it.

Para - 2011-01-16 3:32 AM

For Prime Number sudoku, are we provided with a list of prime numbers made up of different digits?

No.

Because to be honest I don't know all prime numbers by head between 1 and 9 digits (I don't even know them past 2 digits), or be able to figure out if for example 7142957 (which is) or 7148563(which isn't) is a prime or not on the spot. Because the file I found to confirm if these numbers were or weren't, contains 1 million numbers.

From the IB: "...prime numbers are like life. They are very logical but you could never work out the rules, even if you spend all your time thinking about them."
Anyway, Prime Exotica is not a test of memory. So its perfectly alright if you do not remember a list of prime numbers. However, there are a few basic techniques to find out if a number is not a prime number (for example, one such link is here). You may like to go through these once.

And I don't exactly feel like sorting through it to filter out all primes that only contain different digits, just for the sake of being able to solve the sudoku.

I agree with you. This is not needed anyway.

In my opinion, if you approach the puzzle with an open mind and only basic knowledge of prime numbers, you should be able to solve it.

@ 2011-01-17 11:43 AM (#3192 - in reply to #3186) (#3192) Top

rakesh_rai

Posts: 774

Country : India

rakesh_rai posted @ 2011-01-17 11:43 AM

A feature being tried out this time is that of "anonymous ratings". On the score page, the average rating and number of solvers who rated will still be visible. But A cannot see ratings given by B (and vice-versa).

@ 2011-01-17 10:06 PM (#3195 - in reply to #3146) (#3195) Top

muralik7

Posts: 10

Country : India

muralik7 posted @ 2011-01-17 10:06 PM

Rakesh, the moment I started reading first word of IB, it was very much involving and extremely interesting till the end. With my limited exposure to different kinds of puzzles/sudokus, I find these very interesting. Finishing touch (Tennisdoku) is superb. Coincidentally I read this on the day Australian Open began :). Looking forward for the test.

@ 2011-01-20 8:09 PM (#3203 - in reply to #3146) (#3203) Top

neerajmehrotra

Posts: 329

Country : India

neerajmehrotra posted @ 2011-01-20 8:09 PM

I agree murali....... this is going to be one of the most interesting sudoku test...............looking forward for the weekend.

@ 2011-01-20 8:32 PM (#3205 - in reply to #3180) (#3205) Top

neerajmehrotra

Posts: 329

Country : India

neerajmehrotra posted @ 2011-01-20 8:32 PM

Para - 2011-01-16 3:32 AM

For Prime Number sudoku, are we provided with a list of prime numbers made up of different digits? Because to be honest I don't know all prime numbers by head between 1 and 9 digits (I don't even know them past 2 digits), or be able to figure out if for example 7142957 (which is) or 7148563(which isn't) is a prime or not on the spot. Becaused the file I found to confirm if these numbers were or weren't, contains 1 million numbers. And I don't exactly feel like sorting through it to filter out all primes that only contain different digits, just for the sake of being able to solve the sudoku.

The list of first 500 prime numbers is here

http://en.wikipedia.org/wiki/List_of_prime_numbers

Hope this will be sufficient to solve the puzzle.

@ 2011-01-21 12:40 AM (#3208 - in reply to #3146) (#3208) Top

Administrator

Country : India

Administrator posted @ 2011-01-21 12:40 AM

The Puzzle Booklet (PB) pdf is now available for download.

@ 2011-01-21 5:13 PM (#3212 - in reply to #3208) (#3212) Top

rakesh_rai

Posts: 774

Country : India

rakesh_rai posted @ 2011-01-21 5:13 PM

The points for grids are rough indicators of the difficulty level of the grid. However, your experience can vary.

For every sudoku grid, exactly 10 cells are marked as answer key.

I do hope that you find time to take and enjoy the test over the weekend. In case of any issues during the test, you can send PM/mail to me.

(pe.jpg)

Attachments
----------------

pe.jpg (43KB - 3 downloads)

@ 2011-01-22 2:18 PM (#3214 - in reply to #3212) (#3214) Top

Tejal Phatak

Posts: 81

Country : India

Tejal Phatak posted @ 2011-01-22 2:18 PM

Really good set of puzzles..... Had a great time solving them!

I personally liked DNA Sudoku best but unfortunately could not submit the answer to it because of lack of few seconds...
Kombinance and Kid were enjoyable too...

Thanks for the test Rakesh, got to solve some new and really good variants! :)

@ 2011-01-22 2:34 PM (#3215 - in reply to #3146) (#3215) Top

Neeraj

Posts: 12

Country : India

Neeraj posted @ 2011-01-22 2:34 PM

hey i guess mine "Poker Sudoku" solution is correct.
it says the solution is wrong.could you check it.
and ya in "Product Sudoku" i forgot to write 2 numbers in a hurry.
can't i get partial marking for that??

because of that my 2 solutions are given wrong

@ 2011-01-22 2:58 PM (#3216 - in reply to #3146) (#3216) Top

Neeraj

Posts: 12

Country : India

Neeraj posted @ 2011-01-22 2:58 PM

i am not able to view the scores of other people who have completed the test.

Edited by rakesh_rai
Removed some explicit references to puzzle grids

@ 2011-01-22 3:05 PM (#3218 - in reply to #3216) (#3218) Top

rakesh_rai

Posts: 774

Country : India

rakesh_rai posted @ 2011-01-22 3:05 PM

Neeraj: All sudoku grids are correct. There are no missing numbers or images in any grid. Also, request you to discuss specific queries on any grids after the test.

@ 2011-01-22 3:13 PM (#3220 - in reply to #3215) (#3220) Top

Administrator

Country : India

Administrator posted @ 2011-01-22 3:13 PM

Neeraj - 2011-01-22 2:34 PM

hey i guess mine "Poker Sudoku" solution is correct.
it says the solution is wrong.could you check it.
and ya in "Product Sudoku" i forgot to write 2 numbers in a hurry.
can't i get partial marking for that??

because of that my 2 solutions are given wrong

Neeraj:

Your poker sudoku solution is incorrect.
In product sudoku, you were very close - in fact, you missed entering only one digit in the answer key. Sorry to say that we cannot award any partial marks.

@ 2011-01-22 3:19 PM (#3221 - in reply to #3216) (#3221) Top

Administrator

Country : India

Administrator posted @ 2011-01-22 3:19 PM

Neeraj - 2011-01-22 2:58 PM

i am not able to view the scores of other people who have completed the test.

You should be able to view your results after you complete the test.

@ 2011-01-22 6:20 PM (#3223 - in reply to #3146) (#3223) Top

Ours brun

Posts: 148

Country : France

Ours brun posted @ 2011-01-22 6:20 PM

Thanks for this nice test Rakesh. I must admit that I wasn't completely enthousiast about some of the puzzles, which rules did not seem very interesting to me, but you exploited them well and I really had pleasure today.

Only 10 puzzles solved out on 13 because of, as usual, lots of mistakes - and also a printing problem. But no big deal, I came for fun and fun was there.

See you all on next LMI test,

Bastien

@ 2011-01-22 7:09 PM (#3224 - in reply to #3146) (#3224) Top

aldentea

Posts: 10

Country : Japan

aldentea posted @ 2011-01-22 7:09 PM

At the example of KID sudoku, should the clue of 4th row be 5664(instead of 5655)?

@ 2011-01-22 7:25 PM (#3225 - in reply to #3224) (#3225) Top

Fred76

Posts: 337

Country : Switzerland

Fred76 posted @ 2011-01-22 7:25 PM

aldentea - 2011-01-22 7:09 PM

At the example of KID sudoku, should the clue of 4th row be 5664(instead of 5655)?

I think you're right, little mistake in the IB...


	@ 2011-01-14 5:14 PM (#3171 - in reply to #3168) (#3171) Top
caudmont Posts: 18 Country : France	caudmont posted @ 2011-01-14 5:14 PM rakesh_rai - 2011-01-14 9:47 AM caudmont - 2011-01-14 2:20 AM DNA : would the sum of cell A in orange strand and the same cell A in blue strand equal 10 ? That is a good question. I would repeat the relevant portion of the rules: "The sum of all corresponding numbers in the two strands is 10 (6 in the example)." - I hope you would have got your answer. Thanks
	@ 2011-01-14 5:59 PM (#3173 - in reply to #3146) (#3173) Top
akash.doulani Posts: 157 Country : India	akash.doulani posted @ 2011-01-14 5:59 PM one question regarding tennisdoku. in a situation where the set is given as 1:0 , does the first number have to be greater than the second one or it could be both ways ?
	@ 2011-01-14 6:10 PM (#3174 - in reply to #3173) (#3174) Top
rakesh_rai Posts: 774 Country : India	rakesh_rai posted @ 2011-01-14 6:10 PM akash.doulani - 2011-01-14 5:59 PMone question regarding tennisdoku. in a situation where the set is given as 1:0 , does the first number have to be greater than the second one or it could be both ways ? Thanks for asking this question, Akash. In a "x:y" situation, x is the number of sets won and y is the number of sets lost. So, a "1:0" means 1 set won and 0 sets lost. And a set can be won in many ways: 6-1, 6-2, 6-3, 6-4, 7-5, 7-6, 8-6 and 9-7. so the two cells in question will have one of these "final scores". To answer your question precisely, the answer is Yes. For a "1:0" situation, the first number has to be greater than the second one. I hope this helps clarify your doubt.
	@ 2011-01-14 8:07 PM (#3175 - in reply to #3146) (#3175) Top
purifire Posts: 460 Country : India	purifire posted @ 2011-01-14 8:07 PM Very Interesting sudokus... nice twists Rakesh... Looking forward to the test.... :) ps. Thanks for letting me know my numerological number Rishi
	@ 2011-01-14 8:25 PM (#3176 - in reply to #3146) (#3176) Top
akash.doulani Posts: 157 Country : India	akash.doulani posted @ 2011-01-14 8:25 PM will the clues(i.e the numbers that appear in each type ) be given for poker sudoku or we will have to find out the numbers ourselves?
	@ 2011-01-14 9:30 PM (#3177 - in reply to #3176) (#3177) Top
rakesh_rai Posts: 774 Country : India	rakesh_rai posted @ 2011-01-14 9:30 PM akash.doulani - 2011-01-14 8:25 PM will the clues(i.e the numbers that appear in each type ) be given for poker sudoku or we will have to find out the numbers ourselves? Akash: This is mentioned clearly in the IB. "The repeating number in three of a kind/ four of a kind will be given. For full house, two numbers will be given, one of which will form a “pair” and the other will represent “three of a kind”. For Two pair, again two numbers will be given, both of which will form “pair”. For sequence, the first and last number will be given as clues." So you do not have to find out the numbers. With the given clues, you'll probably need to find out which hand type will be on which line.
	@ 2011-01-16 3:32 AM (#3180 - in reply to #3146) (#3180) Top
Para Posts: 315 Country : The Netherlands	Para posted @ 2011-01-16 3:32 AM For Prime Number sudoku, are we provided with a list of prime numbers made up of different digits? Because to be honest I don't know all prime numbers by head between 1 and 9 digits (I don't even know them past 2 digits), or be able to figure out if for example 7142957 (which is) or 7148563(which isn't) is a prime or not on the spot. Becaused the file I found to confirm if these numbers were or weren't, contains 1 million numbers. And I don't exactly feel like sorting through it to filter out all primes that only contain different digits, just for the sake of being able to solve the sudoku.
	@ 2011-01-16 12:02 PM (#3182 - in reply to #3177) (#3182) Top
purifire Posts: 460 Country : India	purifire posted @ 2011-01-16 12:02 PM In the Numerologidoku, can the resultant number be flipped. as in example you mentioned that when I add up the letters I get 63. So is only 63 to be used or it can be flipped to 36? Rishi
	@ 2011-01-16 3:22 PM (#3185 - in reply to #3182) (#3185) Top
rakesh_rai Posts: 774 Country : India	rakesh_rai posted @ 2011-01-16 3:22 PM purifire - 2011-01-16 12:02 PM In the Numerologidoku, can the resultant number be flipped. as in example you mentioned that when I add up the letters I get 63. So is only 63 to be used or it can be flipped to 36? Rishi: Flipping is not allowed. (also because this is not the FLIP LMI Test ) As mentioned in the IB, All “clue numbers” in the shaded cells read from left to right. - without flipping. So, if one of the clues is RISHI, we'll have to fill 63 in two consecutive shaded cells in the same row, reading left to right.
	@ 2011-01-16 3:41 PM (#3186 - in reply to #3180) (#3186) Top
rakesh_rai Posts: 774 Country : India	rakesh_rai posted @ 2011-01-16 3:41 PM Para: I was expecting this query and I'm glad you asked it. Para - 2011-01-16 3:32 AM For Prime Number sudoku, are we provided with a list of prime numbers made up of different digits? No. Because to be honest I don't know all prime numbers by head between 1 and 9 digits (I don't even know them past 2 digits), or be able to figure out if for example 7142957 (which is) or 7148563(which isn't) is a prime or not on the spot. Because the file I found to confirm if these numbers were or weren't, contains 1 million numbers. From the IB: "...prime numbers are like life. They are very logical but you could never work out the rules, even if you spend all your time thinking about them." Anyway, Prime Exotica is not a test of memory. So its perfectly alright if you do not remember a list of prime numbers. However, there are a few basic techniques to find out if a number is not a prime number (for example, one such link is here). You may like to go through these once. And I don't exactly feel like sorting through it to filter out all primes that only contain different digits, just for the sake of being able to solve the sudoku. I agree with you. This is not needed anyway. In my opinion, if you approach the puzzle with an open mind and only basic knowledge of prime numbers, you should be able to solve it.
	@ 2011-01-17 11:43 AM (#3192 - in reply to #3186) (#3192) Top
rakesh_rai Posts: 774 Country : India	rakesh_rai posted @ 2011-01-17 11:43 AM A feature being tried out this time is that of "anonymous ratings". On the score page, the average rating and number of solvers who rated will still be visible. But A cannot see ratings given by B (and vice-versa).
	@ 2011-01-17 10:06 PM (#3195 - in reply to #3146) (#3195) Top
muralik7 Posts: 10 Country : India	muralik7 posted @ 2011-01-17 10:06 PM Rakesh, the moment I started reading first word of IB, it was very much involving and extremely interesting till the end. With my limited exposure to different kinds of puzzles/sudokus, I find these very interesting. Finishing touch (Tennisdoku) is superb. Coincidentally I read this on the day Australian Open began :). Looking forward for the test.
	@ 2011-01-20 8:09 PM (#3203 - in reply to #3146) (#3203) Top
neerajmehrotra Posts: 329 Country : India	neerajmehrotra posted @ 2011-01-20 8:09 PM I agree murali....... this is going to be one of the most interesting sudoku test...............looking forward for the weekend.
	@ 2011-01-20 8:32 PM (#3205 - in reply to #3180) (#3205) Top
neerajmehrotra Posts: 329 Country : India	neerajmehrotra posted @ 2011-01-20 8:32 PM Para - 2011-01-16 3:32 AM For Prime Number sudoku, are we provided with a list of prime numbers made up of different digits? Because to be honest I don't know all prime numbers by head between 1 and 9 digits (I don't even know them past 2 digits), or be able to figure out if for example 7142957 (which is) or 7148563(which isn't) is a prime or not on the spot. Becaused the file I found to confirm if these numbers were or weren't, contains 1 million numbers. And I don't exactly feel like sorting through it to filter out all primes that only contain different digits, just for the sake of being able to solve the sudoku. The list of first 500 prime numbers is here http://en.wikipedia.org/wiki/List_of_prime_numbers Hope this will be sufficient to solve the puzzle.
	@ 2011-01-21 12:40 AM (#3208 - in reply to #3146) (#3208) Top
Administrator Country : India	Administrator posted @ 2011-01-21 12:40 AM The Puzzle Booklet (PB) pdf is now available for download.
	@ 2011-01-21 5:13 PM (#3212 - in reply to #3208) (#3212) Top
rakesh_rai Posts: 774 Country : India	rakesh_rai posted @ 2011-01-21 5:13 PM The points for grids are rough indicators of the difficulty level of the grid. However, your experience can vary. For every sudoku grid, exactly 10 cells are marked as answer key. I do hope that you find time to take and enjoy the test over the weekend. In case of any issues during the test, you can send PM/mail to me. (pe.jpg) Attachments ---------------- pe.jpg (43KB - 3 downloads)
	@ 2011-01-22 2:18 PM (#3214 - in reply to #3212) (#3214) Top
Tejal Phatak Posts: 81 Country : India	Tejal Phatak posted @ 2011-01-22 2:18 PM Really good set of puzzles..... Had a great time solving them! I personally liked DNA Sudoku best but unfortunately could not submit the answer to it because of lack of few seconds... Kombinance and Kid were enjoyable too... Thanks for the test Rakesh, got to solve some new and really good variants! :)
	@ 2011-01-22 2:34 PM (#3215 - in reply to #3146) (#3215) Top
Neeraj Posts: 12 Country : India	Neeraj posted @ 2011-01-22 2:34 PM hey i guess mine "Poker Sudoku" solution is correct. it says the solution is wrong.could you check it. and ya in "Product Sudoku" i forgot to write 2 numbers in a hurry. can't i get partial marking for that?? because of that my 2 solutions are given wrong
	@ 2011-01-22 2:58 PM (#3216 - in reply to #3146) (#3216) Top
Neeraj Posts: 12 Country : India	Neeraj posted @ 2011-01-22 2:58 PM i am not able to view the scores of other people who have completed the test. Edited by rakesh_rai Removed some explicit references to puzzle grids
	@ 2011-01-22 3:05 PM (#3218 - in reply to #3216) (#3218) Top
rakesh_rai Posts: 774 Country : India	rakesh_rai posted @ 2011-01-22 3:05 PM Neeraj: All sudoku grids are correct. There are no missing numbers or images in any grid. Also, request you to discuss specific queries on any grids after the test.
	@ 2011-01-22 3:13 PM (#3220 - in reply to #3215) (#3220) Top
Administrator Country : India	Administrator posted @ 2011-01-22 3:13 PM Neeraj - 2011-01-22 2:34 PM hey i guess mine "Poker Sudoku" solution is correct. it says the solution is wrong.could you check it. and ya in "Product Sudoku" i forgot to write 2 numbers in a hurry. can't i get partial marking for that?? because of that my 2 solutions are given wrong Neeraj: Your poker sudoku solution is incorrect. In product sudoku, you were very close - in fact, you missed entering only one digit in the answer key. Sorry to say that we cannot award any partial marks.
	@ 2011-01-22 3:19 PM (#3221 - in reply to #3216) (#3221) Top
Administrator Country : India	Administrator posted @ 2011-01-22 3:19 PM Neeraj - 2011-01-22 2:58 PM i am not able to view the scores of other people who have completed the test. You should be able to view your results after you complete the test.
	@ 2011-01-22 6:20 PM (#3223 - in reply to #3146) (#3223) Top
Ours brun Posts: 148 Country : France	Ours brun posted @ 2011-01-22 6:20 PM Thanks for this nice test Rakesh. I must admit that I wasn't completely enthousiast about some of the puzzles, which rules did not seem very interesting to me, but you exploited them well and I really had pleasure today. Only 10 puzzles solved out on 13 because of, as usual, lots of mistakes - and also a printing problem. But no big deal, I came for fun and fun was there. See you all on next LMI test, Bastien
	@ 2011-01-22 7:09 PM (#3224 - in reply to #3146) (#3224) Top
aldentea Posts: 10 Country : Japan	aldentea posted @ 2011-01-22 7:09 PM At the example of KID sudoku, should the clue of 4th row be 5664(instead of 5655)?
	@ 2011-01-22 7:25 PM (#3225 - in reply to #3224) (#3225) Top
Fred76 Posts: 337 Country : Switzerland	Fred76 posted @ 2011-01-22 7:25 PM aldentea - 2011-01-22 7:09 PM At the example of KID sudoku, should the clue of 4th row be 5664(instead of 5655)? I think you're right, little mistake in the IB...