|
|
Moscow Puzzle Cup 2016 Author
Posts: 238
 
Location: Russia | auroux - 2023-04-18 12:21 AM
Riad Khanmagomedov - 2023-04-17 11:06 AMYou can't break the expression wherever you want. If you write down your expressions many times in a row (or read in a circle an infinite number of times), then you should get the right equality. In the example , you can write 68=45_PLUS_23=68=45_PLUS_23=68= etc.
Ok, thanks. But, uh, wait. Now I am concerned. Is there, then, a requirement to have at least two equal signs?
Otherwise, something like '98765*43210=' around the circle produces a valid equality when reading around the circle infinitely many times: 98765*43210=98765*43210=98765*43210=...
But this seems to violate the spirit of the puzzle, or at least there isn't much optimization left to do in this version.
And for completeness, can you clarify what exactly you expect in the answer key? The example given for the answer format only has one = sign given for each direction, even though there are two reading around the circle, so do we answer by giving what you get by cutting the circle open at an '=' sign and reading everything from just after that '=' sign to just before it, but not including the '=' sign along which we cut?
Sorry to be picky about details, but I think people spending time on this puzzle want to make sure that they are working on the correct version of it...
Thanks,Denis
You must have 2, 3 or more equal signs. You can also get the equality 1 = 3-2 = 5-4 = with three equal signs and write it out endlessly in a circle. But at the same time, in the opposite direction, it must also be true. |
| |
|
Hex Slitherlink Author
Posts: 145
Location: France | Ok thank you! Now it is clear. |
| |
|
Moscow Puzzle Cup 2016 Author
Posts: 238
Location: Russia | auroux - 2023-04-18 11:40 AM
Ok thank you! Now it is clear.
It is allowed to use arithmetic signs on both sides of the equal sign. |
| |
|
Posts: 19
Location: The Netherlands | For puzzle 5 (Navigation), the instruction says to form 8 connected areas along the grid lines, however only 6 letters are given. Does this imply that the other two regions do not occur in the 2 columns of the answer format (column 4 and 9)? Since the answer page also asks for digits and/or letters A-F (rather than A-H for 8 areas instead of 6). |
| |
|
  
Location: India | If you try the puzzle your question will be answered. |
| |
|
Sudoku Day Author
Posts: 103
Location: Serbia | Puzzle 10
Can we create equality without directly expressed result? For the example, is 32_PLUS_54=86_PLUS_0= allowed? Maybe this is a bad example because of zero but I hope you understand the question. |
| |
|
Hex Slitherlink Author
Posts: 145
Location: France | Nikola: I think the answer is yes, and this is exactly what Riad meant when he wrote to me that "It is allowed to use arithmetic signs on both sides of the equal sign." What I am not sure about, though, is whether the answer key should include the final "=" (even though it is there when writing around the circle) - my current understanding based on the PB example is that the circular identity "32_PLUS_54=86_PLUS_0=..." is entered as "32_PLUS_54=86_PLUS_0" for the answer key.
Edited by auroux 2023-04-19 3:57 PM
|
| |
|
Sudoku Day Author
Posts: 103
Location: Serbia | Okay, but in his example he still got a result 1 (in one direction). Another example: 9x2=6x3= ... I don't want to put =18 because it would give 81 in the opposite direction. Maybe confirmation would be useful.
Edited by Nikola 2023-04-19 4:35 PM
|
| |
|
Posts: 11
Location: France | In puzzle 10, there is a digit missing in the "Answer key" sentence
"68=45_PLUS_23, 32_PLUS_54=8" should be ", 68=45_PLUS_23, 32_PLUS_54=86" ;-) |
| |
|
Moscow Puzzle Cup 2016 Author
Posts: 238
Location: Russia | Nikola - 2023-04-19 3:20 PM
Puzzle 10
Can we create equality without directly expressed result? For the example, is 32_PLUS_54=86_PLUS_0= allowed? Maybe this is a bad example because of zero but I hope you understand the question.
Yes |
| |
|
Moscow Puzzle Cup 2016 Author
Posts: 238
Location: Russia | auroux - 2023-04-19 3:55 PM
Nikola: I think the answer is yes, and this is exactly what Riad meant when he wrote to me that "It is allowed to use arithmetic signs on both sides of the equal sign." What I am not sure about, though, is whether the answer key should include the final "=" (even though it is there when writing around the circle) - my current understanding based on the PB example is that the circular identity "32_PLUS_54=86_PLUS_0=..." is entered as "32_PLUS_54=86_PLUS_0" for the answer key.
In this case, write the answer as follows: 32_PLUS_54=86_PLUS_0 and 0_PLUS_68= 45_PLUS_23. |
| |
|
Moscow Puzzle Cup 2016 Author
Posts: 238
Location: Russia | Nikola - 2023-04-19 4:27 PM
Okay, but in his example he still got a result 1 (in one direction). Another example: 9x2=6x3= ... I don't want to put =18 because it would give 81 in the opposite direction. Maybe confirmation would be useful.
I gave an example with 1 to demonstrate three equal signs. This example is more successful: 7-6=5-4=3-2=7-6=5-4=3-2= etc. |
| |
|
Moscow Puzzle Cup 2016 Author
Posts: 238
Location: Russia | L00ping007 - 2023-04-19 4:47 PM
In puzzle 10, there is a digit missing in the "Answer key" sentence
"68=45_PLUS_23, 32_PLUS_54=8" should be ", 68=45_PLUS_23, 32_PLUS_54=86" ;-)
I'll correct it, thank you! |
| |
|
Posts: 6
Location: France | On Puzzle 11; does the minesweeper part in itself have to be unique or can it have multiple solutions but only one mine-loops pairing? |
| |
|
Moscow Puzzle Cup 2016 Author
Posts: 238
Location: Russia | Barbitos - 2023-04-19 10:22 PM
On Puzzle 11; does the minesweeper part in itself have to be unique or can it have multiple solutions but only one mine-loops pairing?
Quote from the text: "Create a Minesweeper puzzle with a unique solution". |
| |
|
Posts: 6
Location: France | thanks :) i figured that was probably the case but wanted to make sure
also thanks for hosting this contest, i'm having a blast solving those devilish puzzles |
| |
|
Hex Slitherlink Author
Posts: 145
Location: France | Riad Khanmagomedov - 2023-04-19 10:39 AM Barbitos - 2023-04-19 10:22 PMOn Puzzle 11; does the minesweeper part in itself have to be unique or can it have multiple solutions but only one mine-loops pairing? Quote from the text: "Create a Minesweeper puzzle with a unique solution". |
| |
|
Posts: 16
Location: United Kingdom | In Puzzle 6, I'm a bit confused by the "vice versa" in the instructions for Turns. Is it saying that if the loop doesn't turn and enters a cell without a circle, then it must turn in the next cell (so you can't have more than one straight in a row)? |
| |
|
Moscow Puzzle Cup 2016 Author
Posts: 238
Location: Russia | auroux - 2023-04-20 12:54 AM
Riad Khanmagomedov - 2023-04-19 10:39 AM Barbitos - 2023-04-19 10:22 PMOn Puzzle 11; does the minesweeper part in itself have to be unique or can it have multiple solutions but only one mine-loops pairing? Quote from the text: "Create a Minesweeper puzzle with a unique solution". Oh, that's so disappointing. It would have been more elegant to have to create a puzzle whose solution is unique when one takes into account the requirement that there should exist a loop (but which may have multiple solutions as a pure minesweeper puzzle ) -- so much so that I assumed that it was actually the task. Oh well, I shall redo it to make something that is also unique as a minesweeper puzzle. I was so happy with my submission, but it's definitely not unique at all as a minesweeper.
Denis, I will check the uniqueness of the Minesweeper puzzle, and then watch a loop. |
| |
|
Moscow Puzzle Cup 2016 Author
Posts: 238
Location: Russia | pinkagape - 2023-04-20 10:57 AM
In Puzzle 6, I'm a bit confused by the "vice versa" in the instructions for Turns. Is it saying that if the loop doesn't turn and enters a cell without a circle, then it must turn in the next cell (so you can't have more than one straight in a row)?
In this part of the grid, the line behaves like in the puzzle "Every second turn". If there was a turn in a circle, then the next turn will be in a cell without a circle, then again in a circle, etc. |
| |
|
Posts: 11
Location: France | Puzzle 6
"It is also possible for the line to make a turn and leave the grid, in this case it can turn in the next grid before meeting a circle."
Is there a vice versa too ? When the last turn before leaving the grid is a circle ?
Isn't it more accurate to say :
"It is also possible for the line to make a turn and leave the grid, in this case :
- if the last turn in the grid isn't a circle, it can turn in the next grid before meeting a circle.
- if the last turn in the grid is a circle, it can turn in the next grid at a circle"
? |
| |
|
2021 World Sudoku+Puzzle Convention Organizer
Posts: 1817
Location: India | A new puzzle booklet has been uploaded with changes to the text in Puzzle 10's rules, to reflect the discussions here. |
| |
|
2021 World Sudoku+Puzzle Convention Organizer
Posts: 1817
Location: India | L00ping007 - 2023-04-20 5:18 PM
Puzzle 6
"It is also possible for the line to make a turn and leave the grid, in this case it can turn in the next grid before meeting a circle."
Is there a vice versa too ? When the last turn before leaving the grid is a circle ?
Isn't it more accurate to say :
"It is also possible for the line to make a turn and leave the grid, in this case :
- if the last turn in the grid isn't a circle, it can turn in the next grid before meeting a circle.
- if the last turn in the grid is a circle, it can turn in the next grid at a circle"
?
Yes, this is what is intended to be conveyed. |
| |
|
Posts: 7
Location: South Korea | Puzzle 12
Must all words be connected? |
| |
|
Moscow Puzzle Cup 2016 Author
Posts: 238
Location: Russia | EoHeongMat - 2023-04-21 12:02 AM
Puzzle 12
Must all words be connected?
Yes, of course. |
| |
WSPC 2017 • Schedule • Participation • Location • WSC • WPC • Contact •Search •Recent
Riad Khanmagomedov's April Contest — 16th to 23nd April 2023
