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rakesh_rai
Posts: 774
  
Country : India | rob - 2015-11-22 6:44 AM
Just to confirm: It is a consequence of the rules of 4/5 Spiral Galaxies that there can not be a 2x2 square.
The example is uniquely solvable without that rule.
Yes. There cannot be a 2x2 square. as circles are not allowed at intersection of four cells. |
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chaotic_iak
Posts: 241
Country : Indonesia | Spiral Galaxies 4/5's rules aren't very elegant...
Instead of "each region has exactly one circle that is the point of symmetry" and "not all black circles are given" (which are somewhat contradictory), use "if a region contains a black circle then it is the point of symmetry".
Instead of "a black circle may not be on the intersection of four cells", use "regions may not be 2x2 squares". |
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Administrator
Posts: 3567
 
Country : India | chaotic_iak - 2015-11-22 10:32 AM
Spiral Galaxies 4/5's rules aren't very elegant...
Instead of "each region has exactly one circle that is the point of symmetry" and "not all black circles are given" (which are somewhat contradictory), use "if a region contains a black circle then it is the point of symmetry".
Instead of "a black circle may not be on the intersection of four cells", use "regions may not be 2x2 squares".
Thanks for the suggestions. We will include these suggestions also while updating the points table in the IB. |
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Fred76
Posts: 337
Country : Switzerland | Fred76 posted @ 2015-11-22 11:20 PM chaotic_iak - 2015-11-22 10:32 AM
Instead of "a black circle may not be on the intersection of four cells", use "regions may not be 2x2 squares".
2x2 squares are not the only regions that have the point of symmetry on the intersection of four cells... |
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mihiryadav
Posts: 27
Country : India | Are there any more examples available from the past tests?
Edited by mihiryadav 2015-11-22 11:36 PM
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rakesh_rai
Posts: 774
Country : India | Fred76 - 2015-11-22 11:20 PM
chaotic_iak - 2015-11-22 10:32 AM
Instead of "a black circle may not be on the intersection of four cells", use "regions may not be 2x2 squares".
2x2 squares are not the only regions that have the point of symmetry on the intersection of four cells...
We are talking of regions with 4 or 5 cells only. |
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rakesh_rai
Posts: 774
Country : India | mihiryadav - 2015-11-22 11:36 PM
Are there any examples available from the past tests? For which puzzle type? |
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mihiryadav
Posts: 27
Country : India | For Spiral galaxies 4/5... |
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Fred76
Posts: 337
Country : Switzerland | Fred76 posted @ 2015-11-22 11:46 PM rakesh_rai - 2015-11-22 11:36 PM
Fred76 - 2015-11-22 11:20 PM
chaotic_iak - 2015-11-22 10:32 AM
Instead of "a black circle may not be on the intersection of four cells", use "regions may not be 2x2 squares".
2x2 squares are not the only regions that have the point of symmetry on the intersection of four cells...
We are talking of regions with 4 or 5 cells only.
Ah yes, sorry ! I haven't read all the instructions... |
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rakesh_rai
Posts: 774
Country : India | |
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mihiryadav
Posts: 27
Country : India | Thank you :) |
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Cenan
| Cenan posted @ 2015-11-23 2:03 PM Administrator - 2015-11-15 9:20 AM I want to be clear about the time period to take the test 'Regions' : Will it be possible to take it on 30th Nov or not ? |
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vopani
Posts: 739
Country : India | vopani posted @ 2015-11-23 2:21 PM Cenan - 2015-11-23 2:03 PM
I want to be clear about the time period to take the test 'Regions' : Will it be possible to take it on 30th Nov or not ?
Yes. The contest will end at 23:59 GMT on 30th November, so you can take it anytime before that.
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rakesh_rai
Posts: 774
Country : India |
Instruction Booklet updated: Points table has been added and Spiral Galaxies 4/5 rules have been made more elegant based on feedback.
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rakesh_rai
Posts: 774
Country : India | One clarification on the answer keys: If parts of the same region come more than once in the answer key, they need to be mentioned separately in the answer key. |
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Administrator
Posts: 3567
Country : India |
Puzzle Booklet is uploaded now. It contains seven pages.
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An LMI player
| An LMI player posted @ 2015-11-28 1:29 AM | How well did the variants represent the theme of the test ? | variations represented the theme well | | | What was your opinion of the distribution of easy/hard puzzles? | Too many easy puzzles | | | What did you think about the puzzle quality of the test? | Very nice | | | Which set of puzzles did you like the most? | Spiral Galaxies | | | Of the puzzles you solved/attempted, how well did the point values reflect the difficulty? | Most puzzles were worth the right amount | | | What was your opinion of the booklet formatting and printing? | Just right | |
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kishy72
Posts: 422
Country : India | kishy72 posted @ 2015-11-28 1:54 AM | How well did the variants represent the theme of the test ? | variations represented the theme well | | | What was your opinion of the distribution of easy/hard puzzles? | Just right | | | What did you think about the puzzle quality of the test? | Very nice | | | Which set of puzzles did you like the most? | Area Division | | | Of the puzzles you solved/attempted, how well did the point values reflect the difficulty? | Most puzzles were worth the right amount | | | What was your opinion of the booklet formatting and printing? | Just right | |
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achan1058
Posts: 80
Country : Canada | | How well did the variants represent the theme of the test ? | variations represented the theme well | | | What was your opinion of the distribution of easy/hard puzzles? | Too many easy puzzles | | | What did you think about the puzzle quality of the test? | Fairly Nice | | | Which set of puzzles did you like the most? | Fillomino | | | Of the puzzles you solved/attempted, how well did the point values reflect the difficulty? | Most puzzles were worth the right amount | | | What was your opinion of the booklet formatting and printing? | Just right | |
I found this to be very easy. Some of the puzzles are simply too guessable. |
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Eykir
Posts: 11
Country : United States | Eykir posted @ 2015-11-28 3:18 AM | How well did the variants represent the theme of the test ? | variations represented the theme well | | | What was your opinion of the distribution of easy/hard puzzles? | Just right | | | What did you think about the puzzle quality of the test? | Very nice | | | Which set of puzzles did you like the most? | Spiral Galaxies | | | Of the puzzles you solved/attempted, how well did the point values reflect the difficulty? | Most puzzles were worth the right amount | | | What was your opinion of the booklet formatting and printing? | Just right | |
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swaroop2011
Posts: 668
Country : India | | How well did the variants represent the theme of the test ? | variations represented the theme well | | | What was your opinion of the distribution of easy/hard puzzles? | Just right | | | What did you think about the puzzle quality of the test? | Very nice | | | Which set of puzzles did you like the most? | Spiral Galaxies | | | Of the puzzles you solved/attempted, how well did the point values reflect the difficulty? | Most puzzles were worth the right amount | | | What was your opinion of the booklet formatting and printing? | Just right | |
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swaroop2011
Posts: 668
Country : India | Thanks for awesome set of puzzles. It were really nice, especially Spiral Galaxies.
Happy to finish the set, after disappointing performances in last 2 rounds. Could have done lot better.
I finished All puzzles except 5 Galaxies in 40 min. Then took another 23 minutes(I know I am slow in galaxies,, so kept for last) to complete this 5 until I broke Spiral Galaxies 4/5. I had to again and again and end up no solution at center. Later I finally realized my mistake, somehow in the bottom right corner where there are 2 horizontal I's of size 4 and 1 of size 4. I was drawing it as 2 of size 5 and 1 of size 4, don't know why. But none the less finally realized and completed just in time.
Looking forward next round Snakes. :) |
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rakesh_rai
Posts: 774
Country : India | swaroop2011 - 2015-11-28 5:56 AM
Thanks for awesome set of puzzles. It were really nice, especially Spiral Galaxies.
Happy to finish the set, after disappointing performances in last 2 rounds. Could have done lot better.
I finished All puzzles except 5 Galaxies in 40 min. Then took another 23 minutes(I know I am slow in galaxies,, so kept for last) to complete this 5 until I broke Spiral Galaxies 4/5. I had to again and again and end up no solution at center. Later I finally realized my mistake, somehow in the bottom right corner where there are 2 horizontal I's of size 4 and 1 of size 4. I was drawing it as 2 of size 5 and 1 of size 4, don't know why. But none the less finally realized and completed just in time.
Looking forward next round Snakes. :) Thanks Swaroop. Yes. The Spiral Galaxies were a bit trickier compared to the rest of the puzzles. Good to see you completed the set, which I expected as well.
In the last puzzle, in the bottom right corner, one 'I' pentomino and one 'I' tetromino were obvious. The third one could be a 5 or a 4 length 'I'. If you make it 5 there is no solution in the center area. But I think this becomes clear once you proceed from the left area. |
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swaroop2011
Posts: 668
Country : India | Yes you are correct, it becomes clear when approached from left. But the problem was I took it 5 by default , don't know what made me. Anyways waiting for others performances. :)
Edited by swaroop2011 2015-11-28 10:27 AM
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Kota
Posts: 33
Country : Japan | Kota posted @ 2015-11-28 12:14 PM I enjoyed this set. Thank you so much.
BTW, why did the author make a new rule "There cannot be a circle at the intersection of four cells." in Spiral Galaxies 4/5?
In original Spiral, I think it has no problem that there appear such circles.
In fact, The puzzle in this set has multiple solutions if it permits such circles... |
@ 2015-11-22 9:17 AM (#20046 - in reply to #20043) (#20046) Top