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Tapa Variations Contest - XXI (9th - 14thApr) has started Discuss

Riad Khanmagomedov's April Contest — 11th to 19th April 2017
   LMI Tests -> Annual Competitions55 posts • Page 1 of 3 • 1 2 3
forcolin
Subject: Re: Riad Khanmagomedov's April Contest — 11th to 19th April 2017 @ 2017-04-12 6:46 AM (#22794 - in reply to #22739) (#22794) Top





Posts: 166
100202020
Location: Italy
Sorry but the instructions of puzzle 11 OPTI BALL are unclear to me. Getting old. Need help.
I notice the puzzle is similar to puzzle 8 and perhaps this may induce misunderstanding.
first question.The instructions say that I can put up to 3 right angled triangles in any cell except the start. I can see how to put ONE triangle. I can see how to put TWO triangles (for example A and D) turning a white cell into a black one. But I cannot see how I can put 3 triangles. please explain
Second question: can the ball conclude its route leaving the grid, as in puzzle 8? Or it must stay within the grid at all time, and can only conclude its path against a wall (similar to Tiger in the wood)? Are both options possible?
Third question: What do you mean with the sentence "The ball cannot return back"? I assume the path of the ball can cross itself in an empty white square as in the puzzle 8, and this sentence is not forbidding this, please confirm
mstang
Subject: Re: Riad Khanmagomedov's April Contest — 11th to 19th April 2017 @ 2017-04-12 7:57 AM (#22796 - in reply to #22739) (#22796) Top





Posts: 67
202020
Location: USA
Can I submit an answer twice or more if I find an error in a solution?
Administrator
Subject: Re: Riad Khanmagomedov's April Contest — 11th to 19th April 2017 @ 2017-04-12 8:41 AM (#22797 - in reply to #22796) (#22797) Top


20001000100
Location: India
mstang - 2017-04-12 7:57 AM

Can I submit an answer twice or more if I find an error in a solution?
You can submit as many times as you want. We will consider only the final submission. Also, there is no penalty for wrong submissions.
kiwijam
Subject: Re: Riad Khanmagomedov's April Contest — 11th to 19th April 2017 @ 2017-04-12 8:59 AM (#22798 - in reply to #22739) (#22798) Top




Posts: 161
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Location: New Zealand
Excellent timing, just right to keep me busy over the 4-day weekend here. :)
forcolin
Subject: Re: Riad Khanmagomedov's April Contest — 11th to 19th April 2017 @ 2017-04-12 4:14 PM (#22800 - in reply to #22739) (#22800) Top





Posts: 166
100202020
Location: Italy
There is an error in the answer page for puzzle 10. Two names (LAM/LAURA) share he same box
Riad Khanmagomedov
Subject: Re: Riad Khanmagomedov's April Contest — 11th to 19th April 2017 @ 2017-04-12 4:54 PM (#22801 - in reply to #22794) (#22801) Top


Moscow Puzzle Cup 2016 Author

Posts: 158
1002020
Location: Russia
forcolin - 2017-04-12 6:46 AM

Sorry but the instructions of puzzle 11 OPTI BALL are unclear to me. Getting old. Need help.
I notice the puzzle is similar to puzzle 8 and perhaps this may induce misunderstanding.
first question.The instructions say that I can put up to 3 right angled triangles in any cell except the start. I can see how to put ONE triangle. I can see how to put TWO triangles (for example A and D) turning a white cell into a black one. But I cannot see how I can put 3 triangles. please explain
Second question: can the ball conclude its route leaving the grid, as in puzzle 8? Or it must stay within the grid at all time, and can only conclude its path against a wall (similar to Tiger in the wood)? Are both options possible?
Third question: What do you mean with the sentence "The ball cannot return back"? I assume the path of the ball can cross itself in an empty white square as in the puzzle 8, and this sentence is not forbidding this, please confirm

1. I showed might look like the answer. It implies that the 3 triangles do not need to put in one cell. The triangles in the example were in cells H1, H0, K3.
2. Both are possible. This is the only difference between the puzzle 8 and 11.
3. The ball can cross any cell twice, but could not bounce back 180 degrees from a fully black square, that is, the path cannot overlap itself.
Administrator
Subject: Re: Riad Khanmagomedov's April Contest — 11th to 19th April 2017 @ 2017-04-12 7:45 PM (#22802 - in reply to #22800) (#22802) Top


20001000100
Location: India
forcolin - 2017-04-12 4:14 PM

There is an error in the answer page for puzzle 10. Two names (LAM/LAURA) share he same box

Fixed. Please refresh the submission page.
forcolin
Subject: Re: Riad Khanmagomedov's April Contest — 11th to 19th April 2017 @ 2017-04-12 7:46 PM (#22803 - in reply to #22739) (#22803) Top





Posts: 166
100202020
Location: Italy
I said I am getting old......

Edited by forcolin 2017-04-12 8:07 PM
forcolin
Subject: Re: Riad Khanmagomedov's April Contest — 11th to 19th April 2017 @ 2017-04-12 8:53 PM (#22804 - in reply to #22739) (#22804) Top





Posts: 166
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Location: Italy
With reference to puzzle 12: how much is the score of a line of cell with a unique path but not forming a loop? (for example a group of 3 cells)
Riad Khanmagomedov
Subject: Re: Riad Khanmagomedov's April Contest — 11th to 19th April 2017 @ 2017-04-12 9:10 PM (#22805 - in reply to #22804) (#22805) Top


Moscow Puzzle Cup 2016 Author

Posts: 158
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Location: Russia
forcolin - 2017-04-12 8:53 PM

With reference to puzzle 12: how much is the score of a line of cell with a unique path but not forming a loop? (for example a group of 3 cells)

1 mark.
You remind me a hit of Deep Purple, which I played the guitar: "But I feel I'm growing older..."
kiwijam
Subject: Re: Riad Khanmagomedov's April Contest — 11th to 19th April 2017 @ 2017-04-13 4:04 AM (#22806 - in reply to #22739) (#22806) Top




Posts: 161
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Location: New Zealand
"And the songs that I have sung..."

Hi Riad, some 'easy' questions (just to clarify):
11 OPTI-ROLLBALL: We can place a maximum of 3 triangles in the grid?
11 OPTI-ROLLBALL: The path cannot repeat in an infinite loop, so "M14W" is not allowed?
11 OPTI-ROLLBALL: You can enter the start cell again (at 90 degrees), so "K17Z" is 11.5 points?
12 PENTOMINOES AND LINES: We must place all 12 pentominoes in the grid (so placing only 11 is not valid)?
12 PENTOMINOES AND LINES: In every white region, it is possible to visit every cell with a single line. So a white region in the shape of a T-pentomino is not valid?
12 PENTOMINOES AND LINES: If a region has 2 possible loops (e.g. a white 4x3 rectangle), then it gets 'many many' points?
Riad Khanmagomedov
Subject: Re: Riad Khanmagomedov's April Contest — 11th to 19th April 2017 @ 2017-04-13 1:44 PM (#22808 - in reply to #22806) (#22808) Top


Moscow Puzzle Cup 2016 Author

Posts: 158
1002020
Location: Russia
kiwijam - 2017-04-13 4:04 AM

"And the songs that I have sung..."

Hi Riad, some 'easy' questions (just to clarify):
11 OPTI-ROLLBALL: We can place a maximum of 3 triangles in the grid?
11 OPTI-ROLLBALL: The path cannot repeat in an infinite loop, so "M14W" is not allowed?
11 OPTI-ROLLBALL: You can enter the start cell again (at 90 degrees), so "K17Z" is 11.5 points?
12 PENTOMINOES AND LINES: We must place all 12 pentominoes in the grid (so placing only 11 is not valid)?
12 PENTOMINOES AND LINES: In every white region, it is possible to visit every cell with a single line. So a white region in the shape of a T-pentomino is not valid?
12 PENTOMINOES AND LINES: If a region has 2 possible loops (e.g. a white 4x3 rectangle), then it gets 'many many' points?

Hi James,
11. You can place a maximum of 3 triangles in the grid, but may be less, such as 2, 1 or 0.
The path cannot repeat in an infinite loop (“echo in the distance” will not help).
The start cell can be crossed again (at 90 degrees).
12. You must place all 12 pentominoes in the grid.
In every white region, it is possible to visit every cell with a single line. A white region in the shape of a T-pentomino is not valid.
If a region has 2 possible loops (e.g. a white 4x3 rectangle), then it gets 2 points. I should have been clearer to say about it in the text.
auroux
Subject: Re: Riad Khanmagomedov's April Contest — 11th to 19th April 2017 @ 2017-04-13 8:21 PM (#22809 - in reply to #22739) (#22809) Top


Hex Slitherlink Author

Posts: 112
100
Location: France
Argh. The goal in 12 is to *minimize* the total score!! Just spent many hours trying to maximize it...
chaotic_iak
Subject: Re: Riad Khanmagomedov's April Contest — 11th to 19th April 2017 @ 2017-04-13 8:30 PM (#22810 - in reply to #22739) (#22810) Top



Typed Logic Author

Posts: 241
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Location: Indonesia
To clarify about 12: if there is a loop passing through all cells in a region, the number of marks (or rather, penalty points) you get from that region is equal to the number of loops you have there; otherwise, it's the number of lines?

Edit: More questions.

For 10, the tiebreaker is the total number of letters used in all names?

For 7, a match head catches fire if any of the other cells sharing a side to it also catches fire?

For 5, half-dominoes may not occupy black cells even if the part covering the black cells are empty (no circles)?

Edited by chaotic_iak 2017-04-13 8:36 PM
Riad Khanmagomedov
Subject: Re: Riad Khanmagomedov's April Contest — 11th to 19th April 2017 @ 2017-04-13 9:27 PM (#22812 - in reply to #22810) (#22812) Top


Moscow Puzzle Cup 2016 Author

Posts: 158
1002020
Location: Russia
chaotic_iak - 2017-04-13 8:30 PM

To clarify about 12: if there is a loop passing through all cells in a region, the number of marks (or rather, penalty points) you get from that region is equal to the number of loops you have there; otherwise, it's the number of lines?

Edit: More questions.

For 10, the tiebreaker is the total number of letters used in all names?

For 7, a match head catches fire if any of the other cells sharing a side to it also catches fire?

For 5, half-dominoes may not occupy black cells even if the part covering the black cells are empty (no circles)?

12. Yes, number of loops/lines.
10. Maximize the number of names, using the least possible letters.
7. The head of the match lit from the flame in an adjacent cell (sharing a side).
5. The black cell should not be on half-domino.
yureklis
Subject: Re: Riad Khanmagomedov's April Contest — 11th to 19th April 2017 @ 2017-04-13 10:49 PM (#22813 - in reply to #22739) (#22813) Top


CTC & TVC Author & Organizer

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It has been so much time to not attempt to solve Riad's puzzles. Yesterday I solved nine of them and I had quite fun. Thanks Riad, really I missed your style.
Riad Khanmagomedov
Subject: Re: Riad Khanmagomedov's April Contest — 11th to 19th April 2017 @ 2017-04-14 1:09 PM (#22814 - in reply to #22813) (#22814) Top


Moscow Puzzle Cup 2016 Author

Posts: 158
1002020
Location: Russia
yureklis - 2017-04-13 10:49 PM

It has been so much time to not attempt to solve Riad's puzzles. Yesterday I solved nine of them and I had quite fun. Thanks Riad, really I missed your style.

Thank you Serkan, I am very pleased and I'm glad to see you among the participants of April Contest!
forcolin
Subject: Re: Riad Khanmagomedov's April Contest — 11th to 19th April 2017 @ 2017-04-14 8:45 PM (#22815 - in reply to #22739) (#22815) Top





Posts: 166
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Location: Italy
For info. IUPAC has recently annouced the names (and symbols) of 4 new elements.

Nihonium and symbol Nh, for the element 113,
Moscovium and symbol Mc, for the element 115,
Tennessine and symbol Ts, for the element 117, and
Oganesson and symbol Og, for the element 118.

the new complete periodic table is available from [url] https://www.iupac.org/cms/wp-content/uploads/2015/07/IUPAC_Periodic_... [/url]

May be useful for the next contest.


Edited by forcolin 2017-04-14 8:46 PM
mstang
Subject: Re: Riad Khanmagomedov's April Contest — 11th to 19th April 2017 @ 2017-04-17 1:43 AM (#22827 - in reply to #22739) (#22827) Top





Posts: 67
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Location: USA
For #4 (build a circular maze), which direction are the digits going? Are they read outside to inside?
mstang
Subject: Re: Riad Khanmagomedov's April Contest — 11th to 19th April 2017 @ 2017-04-17 3:08 AM (#22828 - in reply to #22739) (#22828) Top





Posts: 67
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Location: USA
Also for #9 (Fleet between the pentominoes), how does the answer key work? It says "- or + or FILNPSTUVWXY" -- is "-" for no ship and "+" for ship and the letters for pentominoes?

Also I think there is a typo? J isn't a pentomino but N is. Or is that a different naming system?

Edited by mstang 2017-04-17 3:24 AM
Administrator
Subject: Re: Riad Khanmagomedov's April Contest — 11th to 19th April 2017 @ 2017-04-17 8:46 AM (#22829 - in reply to #22828) (#22829) Top


20001000100
Location: India
mstang - 2017-04-17 3:08 AM

Also for #9 (Fleet between the pentominoes), how does the answer key work? It says "- or + or FILNPSTUVWXY" -- is "-" for no ship and "+" for ship and the letters for pentominoes?

Also I think there is a typo? J isn't a pentomino but N is. Or is that a different naming system?

J is used in this contest.


Riad Khanmagomedov
Subject: Re: Riad Khanmagomedov's April Contest — 11th to 19th April 2017 @ 2017-04-17 2:16 PM (#22830 - in reply to #22827) (#22830) Top


Moscow Puzzle Cup 2016 Author

Posts: 158
1002020
Location: Russia
mstang - 2017-04-17 1:43 AM

For #4 (build a circular maze), which direction are the digits going? Are they read outside to inside?

They are read outside to inside.
-.ferchx.-
Subject: Re: Riad Khanmagomedov's April Contest — 11th to 19th April 2017 @ 2017-04-18 1:40 AM (#22832 - in reply to #22739) (#22832) Top




Posts: 12

Location: Spain
Congratulations Riad. Excellent puzzles. Great fun!
Riad Khanmagomedov
Subject: Re: Riad Khanmagomedov's April Contest — 11th to 19th April 2017 @ 2017-04-18 1:54 PM (#22833 - in reply to #22832) (#22833) Top


Moscow Puzzle Cup 2016 Author

Posts: 158
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Location: Russia
-.ferchx.- - 2017-04-18 1:40 AM

Congratulations Riad. Excellent puzzles. Great fun!

Thank you Fernando!
Mihalich
Subject: Re: Riad Khanmagomedov's April Contest — 11th to 19th April 2017 @ 2017-04-18 10:52 PM (#22835 - in reply to #22739) (#22835) Top




Posts: 22
20
Location: Ukraine
Thank You, Riad! You have the usual, unusual puzzles - very interesting!
Good luck and new faery tasks!
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