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Location: India | |
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Posts: 35
Location: India | In Spiral Galaxies, should each region definitely contain a circle? Or can there be regions whose point of symmetry is not shown? |
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Location: India | mathcrazy - 2014-03-10 8:49 PM
In Spiral Galaxies, should each region definitely contain a circle? Or can there be regions whose point of symmetry is not shown? In standard Spiral Galaxies all circles / central points will be given. That means, each region must contain exactly one of the given circles.
As noted in the IB, and as it had happened in the previous beginners' tests, some rules are deviated in the exploratory category. For those puzzles, you need to look at the given example to find out the deviation in rules, if any. |
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Posts: 35
Location: India | debmohanty - 2014-03-10 9:21 PM
mathcrazy - 2014-03-10 8:49 PM
In Spiral Galaxies, should each region definitely contain a circle? Or can there be regions whose point of symmetry is not shown? In standard Spiral Galaxies all circles / central points will be given. That means, each region must contain exactly one of the given circles.
As noted in the IB, and as it had happened in the previous beginners' tests, some rules are deviated in the exploratory category. For those puzzles, you need to look at the given example to find out the deviation in rules, if any.
Thanks, that cleared my doubt. Where can I find solving techniques for Spiral Galaxies? There seems to be more than one way of proceeding with each puzzle, and I'm able to realize very late that I proceeded wrongly. |
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Typed Logic Author
Posts: 241
Location: Indonesia | Basic deductions:
- Two circles that are in adjacent cells have walls between them. Note that a circle is included even if it's only partially inside a cell (at the edge or corner).
- When a circle has a wall adjacent to it, the symmetrically opposite border must also be wall.
Intermediate deductions:
- Keep track of what cells a circle contains. The above two rules apply even for non-circle cells, as long as they belong to different regions.
- Sometimes, a cell is just so far from other circles; try to figure out which circle holds this cell.
- Sometimes intuition helps scoring a quick time. |
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Location: India | Beginners' contest is delayed - we will post a note when it starts. |
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Posts: 35
Location: India | Any pointers on how to proceed with this Spiral Galaxies puzzle after this?
http://oi59.tinypic.com/27zlzll.jpg
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2021 World Sudoku+Puzzle Convention Organizer
Posts: 164
Location: Slovakia |
Cells C12-R8,9,10 are in the same region, for example. |
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PR 2020 (Shading and Loops) Author
Posts: 668
Location: India | also c14 r1 and r2 have only one choice .. basically find some cells which can go in unique way. :)
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Posts: 35
Location: India | Okay got it, thanks to both of you for those tips :)
Edited by mathcrazy 2014-03-14 8:41 PM
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Posts: 35
Location: India | swaroop2011 - 2014-03-14 8:29 PM
also c14 r1 and r2 have only one choice .. basically find some cells which can go in unique way. : )
How do cells C14R1 and C14R2 have only one choice?
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PR 2020 (Shading and Loops) Author
Posts: 668
Location: India | ok think in this way to which galaxy does c14r2 cell can join, you will find only one way. |
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Posts: 30
Location: United States | Personally, in a forty-minute contest, I think that good notation is going to make a huge difference. Every time I try a puzzle like this, I go back and forth between drawing the border and connecting the cells directly, wasting a lot of time and creating a real mess of lines across the puzzle. This may be one puzzle type where I need to break into my child's supply of color pencils... |
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Posts: 80
Location: Canada | When is this contest actually starting, since I am not seeing anything other than the instructions booklet. |
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Location: India | Administrator - 2014-03-14 5:08 PM
Beginners' contest is delayed - we will post a note when it starts.
achan1058 - 2014-03-15 3:11 AM
When is this contest actually starting, since I am not seeing anything other than the instructions booklet.
Quite unusually, we have run into some issues here. I can't put an exact time right now, but it will take around 12 hours, as I post this.
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Location: India | March Beginners' Puzzle Contest has started
The dates are revised to 15 th - 20 th March (including both dates )
Submission Links : Spiral Galaxies • Tetrominoes
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2021 World Sudoku+Puzzle Convention Organizer
Posts: 164
Location: Slovakia | Great puzzles, Serkan! I really enjoyed solving them. But from my view, discovering the twisted rules is too difficult, I am not sure, whether beginners will get through it. I solved Galaxies about 20 minutes and 8-10 minutes was just about guessing the proper rules. |
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Typed Logic Author
Posts: 241
Location: Indonesia | Great puzzles indeed. The puzzles feel reasonable (also I now know I'm not particularly good in Galaxies). I feel the exploratory rules for Galaxies is a bit stretching it though. Black and white circles are good ideas, but gray circles just sound like throwing the symmetry part of Galaxies away. I have no particular comments, although I feel Tetromino should also have a puzzle or two without givens.
Also, for some reason I blazed through the first six Tetromino puzzles in 11 minutes (plus two stupid mistakes on the first puzzle), and the last two in 17 minutes.  |
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Posts: 43
Location: United States | Excellent job, Serkan. I particularly enjoyed SG # 6, which I thought was quite clever. Thanks for the contest!
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Posts: 69
Location: Germany | Great puzzles!
However, I think I have an indication if my answer is right or wrong before I really submit it. Is this indicated? (The red border of the cell vanishes if my answer has the correct length of the entry string before I hit the button.) |
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Location: India | Realshaggy - 2014-03-15 11:17 PM
However, I think I have an indication if my answer is right or wrong before I really submit it. Is this indicated? (The red border of the cell vanishes if my answer has the correct length of the entry string before I hit the button.)
The red border vanishes when the sum of digits that you enter is equal to the size the grid (excluding black cells in Tetrominoes). It does not check for correctness of the answer.
For example, in Spiral Galaxy 1 - which is a 6X6 puzzle, if you enter 123 or 321 or 1122 or any set of digits summing to 6 the red border will vanish. We use this to check and alert if the answer is not formatted properly. Additionally, there is no penalty on answers which are not formatted correctly.
Hope that clarifies. |
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Posts: 69
Location: Germany | Oh sorry. I didnt recognize you can use the sum of the digits as a check. |
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Shading and Loops (PR 2016/17) Author
Posts: 63
Location: United States | I recently reached the Seasoner level, but the test still says, "You have chosen to play as Beginner." Is there a way to change my level to Seasoner? |
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Hex Slitherlink Author
Posts: 145
Location: France | I agree with most other posters -- really great puzzles, but on Galaxies figuring out the white/grey/black rule and checking on the given example took forever. (I should probably just have tried to solve #7 with the rule I guessed instead of wasting time trying it out on the example, but I really didn't have faith that I had guessed right). |
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Posts: 80
Location: Canada | I guessed wrong on #7 in such a way that produced the right answer, and only realized that when I was trying to do #8...... |
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