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Posts: 668 ![]() ![]() ![]() ![]() ![]() Country : India | swaroop2011 posted @ 2015-11-02 4:36 AM amitsowani - 2015-11-01 2:37 PM swaroop2011 - 2015-11-01 10:07 AM amitsowani - 2015-11-01 8:21 AM swaroop2011 - 2015-11-01 7:00 AM Would appreciate if anyone can tell the path for Magnets last one. (I could place only 3 magnets in the entire grid after lot of struggle) ? The fourth magnets puzzle uses minmax constraints. Look at columns 3,4 and 5. A column with few signs filled (2,2) is surrounded by two heavily filled columns (4,4) and (4,3). This should give you a start Thanks amit. But I guess you are explaining it for Magnets 8 pointer (3rd puzzle). That I already got. I am asking for last one (4th Puzzle - 9 pointer) ? The fourth one is based on transfer of polarities across rows (transfer = number of unbalanced vertical magnets across the two rows). Look at the number of vertical magnets required across rows 4 and 5, 5 and 6. Also look at columns 6 and 7. Thanks. I did got those magnets. But found out what I was missing. Thanks. | ||||||||||||||||||
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Posts: 145 ![]() ![]() ![]() Country : France | auroux posted @ 2015-11-02 11:31 AM Hmph. Assuming that one will be able to finish a PR round within 90 minutes is the wrong strategy. I never figured out how to do Arrows #3 and by the time I decided to move on it was too late to catch up. | ||||||||||||||||||
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Posts: 145 ![]() ![]() ![]() Country : France | auroux posted @ 2015-11-02 11:35 AM
Arrows #3: I spent over 15 minutes on it and never found the solution or even a reasonable solve path. Hashi #2 and #3 (4 and 5 points) took much longer than any of the Magnets puzzles (8 and 9 points). I am not sure if the point values are aimed at beginners or at seasoned players; if the latter, then they are problematic (Magnets is easier than you seem to think it is), if the former then the overall difficulty of the round is problematic. That said, it was still fun. Apart from Arrows #3. | ||||||||||||||||||
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Posts: 1 Country : India | Aruna posted @ 2015-11-02 12:37 PM
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Posts: 102 ![]() Country : United States | ghirsch posted @ 2015-11-02 12:48 PM auroux - 2015-11-01 12:35 PM Arrows #3: I spent over 15 minutes on it and never found the solution or even a reasonable solve path. If you're still looking for how to start it, I think the break-in is meant to be the 3 in the middle. There are only four possible arrows that can point to it (no diagonals), and you can quickly find that two horizontal arrows doesn't work, so you need to do two vertical arrows. From there I don't remember running into many difficulties. | ||||||||||||||||||
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Posts: 349 ![]() ![]() ![]() ![]() ![]() Country : India | amitsowani posted @ 2015-11-02 2:05 PM auroux - 2015-11-02 11:35 AM Arrows #3: I spent over 15 minutes on it and never found the solution or even a reasonable solve path. That said, it was still fun. Apart from Arrows #3. For Arrows #3, the "3" in the center is the starting point. | ||||||||||||||||||
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Posts: 187 ![]() ![]() ![]() ![]() ![]() Country : New Zealand | kiwijam posted @ 2015-11-02 2:32 PM I have learnt that I find it surprisingly difficult to (correctly) count the number of line corners in a row or column... :) Thanks Amit! | ||||||||||||||||||
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Posts: 187 ![]() ![]() ![]() ![]() ![]() Country : New Zealand | kiwijam posted @ 2015-11-02 2:36 PM
I liked the (new to me) 5s interaction logic in the Hashis. I thought Magnets 3 was hard/undervalued. | ||||||||||||||||||
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An LMI player | An LMI player posted @ 2015-11-02 3:25 PM
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Posts: 45 ![]() ![]() Country : India | Swagatam posted @ 2015-11-02 4:00 PM
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Posts: 774 ![]() ![]() ![]() ![]() ![]() ![]() Country : India | rakesh_rai posted @ 2015-11-02 5:42 PM ExtensionBased on requests from more than one player, this test is being extended till Tuesday 12PM IST. See submission page for exact timing. | ||||||||||||||||||
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An LMI player | An LMI player posted @ 2015-11-02 8:07 PM
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Posts: 6 Country : India | shankarsudhir posted @ 2015-11-02 8:10 PM
A good set of puzzles ! | ||||||||||||||||||
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Posts: 51 ![]() ![]() Country : India | RameshLMI posted @ 2015-11-02 8:44 PM
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An LMI player | An LMI player posted @ 2015-11-02 8:45 PM
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Posts: 145 ![]() ![]() ![]() Country : France | auroux posted @ 2015-11-03 3:41 AM Thanks -- yesterday I just didn't see that 3 in the middle. I was obsessing over the 4's on the diagonals for exactly the same reason, but somehow didn't think of the 3 even though it's obviously a better place to start. Okay then, I have to take back some of my negative comments about the puzzle difficulties. I was just being stupid. (I still found Hashi and Arrows to be huge time sinks compared to other puzzle types for equal point values, but possibly it's because I'm just not good at those. My answering timeline doesn't quite reflect solve times due to my computer crashing partway through and needing to be rebooted twice). | ||||||||||||||||||
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Posts: 114 ![]() Country : India | devarajand posted @ 2015-11-03 7:17 AM
Very good set of puzzles. I liked Multi Anglers most. | ||||||||||||||||||
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Posts: 57 ![]() ![]() Country : India | lenson posted @ 2015-11-03 9:59 AM
This was a hard test, and my performance was terrible. But I really enjoyed solving the puzzles after the test. Even though these are 'standard' types, many of the techniques needed to solve the puzzles in the set were unfamiliar to me. Figuring them out was an enjoyable experience. | ||||||||||||||||||
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Posts: 542 ![]() ![]() ![]() Country : India | rajeshk posted @ 2015-11-03 11:13 AM
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An LMI player | An LMI player posted @ 2015-11-03 12:43 PM
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Posts: 349 ![]() ![]() ![]() ![]() ![]() Country : India | amitsowani posted @ 2015-11-03 4:11 PM Congratulations to Ulrich, Michael and Bram for topping the international chart, and to Rohan, Rajesh and Swaroop for topping the Indian chart. Here is the result of voting for puzzle types : Anglers > Magnets > Dominos > Hashi > Arrows The most consistent feedback is that the test contained a large percentage of hard puzzles. We had realized this before the test and in an attempt to balance the difficulty of the puzzles replaced one arrow and magnets puzzle with easier ones. The difficult ones might get used elsewhere (2017?) One option which would have helped is to reduce the grid sizes, especially for magnets. Another concern was with regarding the distribution of points which becomes difficult when the puzzles have narrow solving paths. Also the fact that all the dominos were created by Deb and the rest of the puzzles by me added to the complexity. A little more extensive testing including solvers having varying levels of solving speed might have helped. Thanks to Deb and Prasanna for helping with the organization of this test. Special thanks to Zrinka and Bram for test solving the puzzles at a short notice. Thank you everyone for participating. I will be posting a set of hints to help the beginners on some of the harder puzzles separately. | ||||||||||||||||||
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Posts: 349 ![]() ![]() ![]() ![]() ![]() Country : India | amitsowani posted @ 2015-11-03 4:30 PM Hashi -1 : Use the "No islands" rule throughout the grid - inspired by a comment from Prasanna that very few Hashi puzzles use this rule extensively Hashi -2 : Masyu like chain which goes from top left to bottom right Hashi -3 : Interaction of two 5's near the center Hashi -4 : Interaction of the 4 and the 5's at the center. This one was my personal favorite for the entire set Magnets 1 : Easy puzzle used to replace a harder magnets puzzle Magnets 2 : Existence of half the grid size (8/2 =4) in one of the polarities forces a few bars to be magnets Magnets 3 : Min max - A less loaded column surrounded by two heavily loaded columns. Magnets 4 : Transfer of polarities across rows Arrows 3: 3 in the center gives good starting point Arrows 4: Interaction of two large numbers in the corners (4 and 5) along with the smaller numbers int he remaining two corners (2 and 3) Anglers 2: Parity - Only one angler can reach the fish on bottom left as it has different parity compared to all other fish Anglers 4: Reach ability of top left fish to an angler Multi-anglers- Count of total number of anglers and how many anglers can reach each fish. | ||||||||||||||||||
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Posts: 1800 ![]() ![]() ![]() ![]() ![]() Country : India | prasanna16391 posted @ 2015-11-03 8:44 PM
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Posts: 668 ![]() ![]() ![]() ![]() ![]() Country : India | swaroop2011 posted @ 2015-11-03 11:46 PM
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![]() ![]() ![]() ![]() ![]() Country : India | Administrator posted @ 2015-11-10 7:57 PM Solutions booklet uploaded. |