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Posts: 199
 
Location: United States | swaroop2011 - 2011-07-05 11:54 PM
can anybody tell how to solve SURAROMU of instruction booklet ?
With most Suraromu puzzles, since you use all gates, one good first step is to draw lines through all the gates with just a single cell width. You'll find doing this and connecting forced paths completes the entire upper-left of the example to give you a line that goes through gates 6 and what must be 7 and 8 (as if they were earlier gates you'd have two gate 4's since the grid has a labeled gate 4). After these initial steps, you have free ends you need to link to future gates and this is where you want to focus your attention:
(1) With the end that just went through 6, how do you get to a gate 5 before passing through gate 4?
(2) With the end that just went through 8, how do you get to gate 9?
To answer (1), you'll see the path through 6 must immediately turn or else it would leave no way to pass through gate 4. So the path goes over two cells (but not three cells) so it can get to another gate and leave a one-cell wide path through gate 4. You'll run into this step a lot. A path "blocks" part of one of the gates (you can X out that cell), but now leaves just one cell to pass through, so it must pass through that cell and the other path has to turn away immediately. With those things marked, the chase of the other end to get gate 9 really only has one option and being "path-efficient" is really key there.
The best thing to do to learn Suraromu puzzles is practice on a dozen or so. The logic is fairly different from other types, but once you learn a few rules the type is almost always very easy to solve. Besides Tom's puzzles, I'd point you to the Circumnavi-Gates on Mathgrant's site as good practice.
Edited by motris 2011-07-06 12:21 AM
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PR 2020 (Shading and Loops) Author
Posts: 668
Location: India | thank you
i will try out those. |
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Posts: 152
Location: United Kingdom | Re suraromu/slalom, there are some good examples on Melon's Puzzles blog as well. I don;t recall making many suraromu puzzles, so perhaps other sources are a good idea if you want to get some practice in.
Re motris, I'm sort of taking the view from the other side of things. My own testing times for the larger puzzles vary slightly, but then my solving abilities between these 3 types also varies slightly. The fastest possible times are hopefully all about the same, and so then the theory is the participant can choose to sprint on their own terms. This obviously relaxes the whole accuracy of scientifically measuring everyone's performance relative to each other - but on the other hand should hopefully be a little more fun. For example, I've come across comments where yajilin is a bit of a love/hate type for many people. If they happen to love solving yajilin, then great, but if they don't, then they aren't going to be miserable about being forced to solve an arbitrary type as an apparent tie-breaker. The choice adds a little variability, but hopefully not too much.
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PR 2020 (Shading and Loops) Author
Posts: 668
Location: India | just as a suggestion.
cant there be another way to answer LITS puzzle its confusing to count number of T's or S's we may miss out one.
answer key similar to NURIKABE or any other.
Edited by rakesh_rai 2011-07-08 7:36 AM
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Posts: 152
Location: United Kingdom | Answer keys can be a fiddly business, and I'm not sure I'm entirely happy with the hashi one either. My tip for LITS is once you've completed the puzzle, to briefly spend some time writing the relevant letter on each of the tetrominoes (this doesn't take very long) and then answers will be relatively easy to read off. Promise! |
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PR 2020 (Shading and Loops) Author
Posts: 668
Location: India | ok no problem |
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Location: India | Puzzle Booklets (one for Main Section, and a separate one for Marathon) uploaded
Main Section Puzzle pdf has 10 pages, including a cover page.
Marathon puzzle pdf has 4 pages, including a cover page. Note that Marathon puzzle pdf file has Landscape orientation.
Both pdf files have same password. |
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Location: India | As discussed after Fillomino-Fillia test, a typo will cost 20% of the puzzle value. Of course, one gets 80% only if the author/organizers are certain that the puzzle was solved correctly, but a mistake was made during submission. |
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Location: India | Nikoli Selection has started - Good luck to all. |
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Location: India | Score page - http://logicmastersindia.com/M201107P1/score.asp
If you've not taken the test yet, you can check who all have taken the test in the score page.
If you've taken the test, you can check details of your submission, and others' scores. If you believe some puzzle is marked incorrectly, please use the score page to 'claim points'. |
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Posts: 5
Location: United States | Hello, I'm not sure if this is the place to ask for this, but can I have a manual override for a typo on the numberlink? |
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WSPC Organizer
Posts: 739
Location: India | Nehsb - 2011-07-09 8:21 AM
Hello, I'm not sure if this is the place to ask for this, but can I have a manual override for a typo on the numberlink?
Yes, this is the place to 'claim' typos. |
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Posts: 30
Location: Canada | My kingdom for five more minutes! At least I'm error-free this time. Thanks to all for the test. |
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Location: India | Nehsb - 2011-07-09 8:21 AM
Hello, I'm not sure if this is the place to ask for this, but can I have a manual override for a typo on the numberlink? Check updated score page. |
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WSPC Organizer
Posts: 739
Location: India | Very nice set of puzzles Tom! Thanks.
The answer key for LITS and Hashi should be made simpler if possible in subsequent tests.
Hashi Suggestions: http://logicmastersindia.com/forum/forums/thread-view.asp?tid=354&p...
For LITS, maybe a 'Tapa-style' answer key for marked rows/columns would be suitable.
Edited by Rohan Rao 2011-07-09 10:26 AM
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Posts: 172
Location: ITALY | Nice group of puzzles, more, more!!
I Find the answer key for hashi and lits very simple indeed....can't be simpler...
by the way in shikaku I entered the column next (right) to the column A I know its stupid but I keep doing it.... any chances to have the points awarded?
stefano |
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Location: India | All claims made in forum or made using the Score page will be settled. Please allow us few hours. |
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PR 2020 (Shading and Loops) Author
Posts: 668
Location: India | puzzles were excellent .
I njoyed a lot.
although could have done better.
would be waiting for nikoli 3..!! |
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Posts: 28
Location: Austria | Thanks for the puzzles, great test!
If you can reconstruct all my answer entries then you will see that my latest entry was just overwriting one valid entry key (that I entered much earlier) by another. This could save me some seconds for the tiebreaker and one rank in the final table. :-)
Have fun,
Stefan
P.S.: I actually had a reason to overwrite my solution a second time. You can write me an email if you want to have an explanation. Here it would be a spoiler. |
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Location: India | @euklid, please see my PM |
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WSPC Organizer
Posts: 739
Location: India | forcolin - 2011-07-09 1:04 PM
Nice group of puzzles, more, more!!
I Find the answer key for hashi and lits very simple indeed....can't be simpler...
by the way in shikaku I entered the column next (right) to the column A I know its stupid but I keep doing it.... any chances to have the points awarded?
stefano
The answer key for Hashi is simple, I agree. But I'm not convinced its the simplest. The problem is there's a good chance of a counting error. It requires the player to go through the entire grid carefully. And one can easily mistake a double bridge by a single one in counting (especially those with cumbersome handwriting).
There are some interesting suggestions in the answer key topic for Hashi. |
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Posts: 17
Location: United Kingdom | I had to change computers part of the way through since mine lost its internet connection. The results page only shows those I entered on the second computer - can you add in those I submitted previously please? Thanks! :) |
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Posts: 10
Location: Australia | Yet another enjoyable test... unfortunately my printer ink died (thanks hubby for printing so many things and not telling me) so I had to transcribe most of the puzzles which slowed me down even further than my usual glacial pace. |
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Posts: 4
Location: United States | Great test. Typo correction request for the Hashi: the solution I entered is the total number of horizontal bridges (so 2 * double horizontal bridges + 1 * single horizontal bridges). |
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Posts: 17
Location: India | Nice puzzles(whatever i attempted) !
Made few really stupid errors while submitting the answers(Maybe im too sleepy at this hour!)
(Please consider them if possible!)
Errors:
1.Shikaku-submitted the column to the right of B arrow.
2.Numberlink-submitted the combination of R2 and R3(i dunno what was i looking at!)
Overall i had a good time solving !
All the best to all the remaining participants ! |
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Nikoli Selection - LMI July 2011 Puzzle Test #1
