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2021 World Sudoku+Puzzle Convention Organizer
Posts: 1788
   
Location: India | Ours brun - 2012-08-27 10:00 PM
Am I missing something or is the solution of puzzle 13, "Division", wrong ? As I understand the rules, the "2" clue touches 2 mines and 1 ship part, therefore a total of 3 objects - which would be false. Is it correct ?
It says "or", not "and", so I assume it means the clue either applies to one or the other and not the sum of the two types of objects. We'll wait for Riad to confirm that though. |
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Posts: 148
Location: France | Seems very plausible indeed, and slightly frightening. If it is confirmed, this is probably not the puzzle I will start with. |
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Location: India | prasanna16391 - 2012-08-27 10:25 PM
kishy72 - 2012-08-27 10:21 PM
hiii ...in puzzles 4 and 6 the content of the column is to be written from top to bottom or bottom to top?
Since it is given as bottom to top, I think you can trust the IB ; )
Please note, it is always "Top to Bottom" (and "Left to Right", if applicable).
We will get the IB answer key text updated. |
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Posts: 136
Location: India | The creativity and very narrow solve paths that show in all the puzzles the author has ever designed are very commendable and sometimes really intriguing.
Edited by anurag 2012-08-27 11:21 PM
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Moscow Puzzle Cup 2016 Author
Posts: 234
Location: Russia | From top to bottom, sorry. |
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Moscow Puzzle Cup 2016 Author
Posts: 234
Location: Russia | In the example of the puzzle 13. Division number 2 should point to either 2 mines, or on 2 parts of ships. |
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Location: India | Question in email :
Does Di... count for the monthly test ratings or not?
No |
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Location: India | Serkan has collected some practice materials from earlier IPSTs
Attachments
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 Di_PRACTICE.pdf (166KB - 51 downloads)
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Posts: 315
Location: The Netherlands | Just one question.
8. Dioxides
Can the molecules lie diagonally or are all connections orthogonally? |
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Posts: 136
Location: India | All moleculues/dioxides puzzles i have seen had orthogonally connected atoms.I assume the same here. |
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Location: India | Here is the Differences puzzle from 2007 Internet Puzzle Solvers Test - Thanks Riad for sharing.
 (Differences.png)
Attachments
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Differences.png (40KB - 10 downloads)
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Posts: 172
Location: ITALY | I remember from the old time that Osmium is one of the few elements having a possible oxydation state +8 therefore forming the tetraoxyde OsO4. So my first impression was that the puzzle is wrong. But I have consulted the literature and found that the dioxide is also possible at a lower oxydation state, so the puzzle is chemically correct.
I have a question about Dikuro. The instructions say that "no digits can repeat in a sum". but in the example posted by Serkan there are some blank boxes in which no sum is indicated. Can digits repeat in a row or in a column if no digit is show at the beginning ? |
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Location: India | forcolin - 2012-08-30 1:50 PM
I have a question about Dikuro. The instructions say that "no digits can repeat in a sum". but in the example posted by Serkan there are some blank boxes in which no sum is indicated. Can digits repeat in a row or in a column if no digit is show at the beginning ? The format is slightly changed, and the blank boxes with no sum are replaced by "?" (also seen in the example booklet). Digits will not repeat if there is a "?" instead of a sum.
EDIT : Further clarification on Dikuro : Even at the top of the column (or left of the row) where there is no "?" or no digit (also seen in practice pdf), digits can not repeat.
Also, It will be obvious from the contest puzzle that "?" can represent 1 digit or 2 digits.
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Location: India | Para - 2012-08-30 1:07 AM
8. Dioxides
Can the molecules lie diagonally or are all connections orthogonally? The molecules can not be connected diagonally, they have to be joined orthogonally (as in the example). |
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SM 2020 (Math) Author
Posts: 417
Location: India | Administrator - 2012-08-29 8:54 PM
Serkan has collected some practice materials from earlier IPSTs
great work serkan!!was desperate to see a diamond puzzle question which has all the cards from 2 to 10 and u have posted one ..good work admin!..will be of immense help if model puzzles like these are posted before any monthly puzzle test |
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2021 World Sudoku+Puzzle Convention Organizer
Posts: 1788
Location: India | kishy72 - 2012-08-30 8:09 PM
Administrator - 2012-08-29 8:54 PM
Serkan has collected some practice materials from earlier IPSTs
great work serkan!!was desperate to see a diamond puzzle question which has all the cards from 2 to 10 and u have posted one ..good work admin!..will be of immense help if model puzzles like these are posted before any monthly puzzle test
Well it depends on availability of the types. If they are already available, whoever is aware of it will surely link to them (like Bram did to Naoki Inaba's site in the last puzzle test). Also in the last puzzle test I made a practice puzzle or two, and so did some other authors like Gorogoro (owner of Puzzle Graffiti blog). But its not always possible, since its pretty time consuming to figure out an unfamiliar puzzle type enough to create something of it. |
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Posts: 20
Location: Romania | Thanks.  |
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Location: India | |
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Location: India | This is a restricted thread. As you have seen during Killer Shootout :
Comments posted in the thread after the test started can only be viewed by players who have finished the test. If you are not logged in to forum or if you have not finished the test, you will see first few characters of the post.
The purpose is to encourage players to freely post comments while the test is running.
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2021 World Sudoku+Puzzle Convention Organizer
Posts: 1788
Location: India | I think this is my worst performance of the year. At least for 7 puzzles I reached contradictions, and then solved them after time and realized how stupid my errors were. I liked the Yajilin a lot, but not competitively, because you never know when you miss one black cell somewhere or other, and you always have that feeling some clue might not be satisfied with the added diagonal constraint to look at. Dikuro, Digits Rotation, Disposition were among my favorites too.
Thanks for the test Riad. |
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Location: India | Announcements - Puzzle #13 DIVISION has multiple solutions.
Puzzle #13 DIVISION has multiple solutions. Please do not solve the puzzle.
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SM 2020 (Math) Author
Posts: 417
Location: India | got the value of the horizontal cards in the diamond puzzle as 2 3 5 7 and 10 and i placed the cards in such a way that the conditions in the question (borders dont have common segments and all diamonds should be used)got sastisfied but my answer seems to be wrong as i m not awarded points for that puzzle ..what is the error in my solution? .....i can post a pic of mine if needed?! |
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Location: India | @kishy72, Check my PM.
If you still think your answer is correct, upload your solution. |
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SM 2020 (Math) Author
Posts: 417
Location: India | Administrator - 2012-09-01 6:38 PM
@kishy72, Check my PM.
If you still think your answer is correct, upload your solution.
yup indeed. i have gone through it many times,,not able to spot the error..so kindly go through it and point me my error...i have shaded the borders extra dark for clarity. |
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SM 2020 (Math) Author
Posts: 417
Location: India | Administrator - 2012-09-01 6:38 PM
@kishy72, Check my PM.
If you still think your answer is correct, upload your solution.
the pic is 349kb ..it says attachments should be less than 100kb..how do i post it ?? |
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Di... — SEPTEMBER’S CONTEST 2012 — (1st - 3rd Sep)
