Academic Snake Pit
One day, you get lost in the corridors of your new school and accidentally wander into a pit full of venomous snakes. Unfortunately, the pit is deep and you have hurt your leg in the fall, so there is no climbing out. Fortunately, since you're in a school, all of the snakes are educated and would much rather force you to do a puzzle than eat you.
The snakes give you the following puzzle on a crumpled sheet of paper, under threat of death by poison should you fail to solve it. The front of the paper looks like this:
If you flip the paper over, the back looks like this:
Better not waste time! Although these snakes are academic, it certainly isn't above them to kill and eat a human.
HINT:
The tape is there for a reason.
grid-deduction
asked Dec 29 '18 at 18:17
Frpzzd
871120
|
show 1 more comment
One day, you get lost in the corridors of your new school and accidentally wander into a pit full of venomous snakes. Unfortunately, the pit is deep and you have hurt your leg in the fall, so there is no climbing out. Fortunately, since you're in a school, all of the snakes are educated and would much rather force you to do a puzzle than eat you.
The snakes give you the following puzzle on a crumpled sheet of paper, under threat of death by poison should you fail to solve it. The front of the paper looks like this:
If you flip the paper over, the back looks like this:
Better not waste time! Although these snakes are academic, it certainly isn't above them to kill and eat a human.
HINT:
The tape is there for a reason.
grid-deduction
asked Dec 29 '18 at 18:17
Frpzzd
871120
was the flip horizontal or vertical?
– JonMark Perry
Dec 29 '18 at 18:19
1
@JonMarkPerry Horizontal. I had a feeling someone would ask that. :)
– Frpzzd
Dec 29 '18 at 18:19
yeah, coz the paper itself doesn't look flipped.,.
– JonMark Perry
Dec 29 '18 at 18:20
NOTE: Minor tweak made to first image.
– Frpzzd
Dec 29 '18 at 18:26
Meaning the axis of rotation is horizontal?
– Dr Xorile
Dec 29 '18 at 19:10
|
show 1 more comment
One day, you get lost in the corridors of your new school and accidentally wander into a pit full of venomous snakes. Unfortunately, the pit is deep and you have hurt your leg in the fall, so there is no climbing out. Fortunately, since you're in a school, all of the snakes are educated and would much rather force you to do a puzzle than eat you.
The snakes give you the following puzzle on a crumpled sheet of paper, under threat of death by poison should you fail to solve it. The front of the paper looks like this:
If you flip the paper over, the back looks like this:
Better not waste time! Although these snakes are academic, it certainly isn't above them to kill and eat a human.
HINT:
The tape is there for a reason.
grid-deduction
asked Dec 29 '18 at 18:17
Frpzzd
871120
One day, you get lost in the corridors of your new school and accidentally wander into a pit full of venomous snakes. Unfortunately, the pit is deep and you have hurt your leg in the fall, so there is no climbing out. Fortunately, since you're in a school, all of the snakes are educated and would much rather force you to do a puzzle than eat you.
The snakes give you the following puzzle on a crumpled sheet of paper, under threat of death by poison should you fail to solve it. The front of the paper looks like this:
If you flip the paper over, the back looks like this:
Better not waste time! Although these snakes are academic, it certainly isn't above them to kill and eat a human.
HINT:
The tape is there for a reason.
grid-deduction
grid-deduction
asked Dec 29 '18 at 18:17
Frpzzd
871120
asked Dec 29 '18 at 18:17
Frpzzd
871120
edited Dec 29 '18 at 19:57
asked Dec 29 '18 at 18:17
Frpzzd
871120
asked Dec 29 '18 at 18:17
Frpzzd
871120
asked Dec 29 '18 at 18:17
Frpzzd
871120
871120
was the flip horizontal or vertical?
– JonMark Perry
Dec 29 '18 at 18:19
1
@JonMarkPerry Horizontal. I had a feeling someone would ask that. :)
– Frpzzd
Dec 29 '18 at 18:19
yeah, coz the paper itself doesn't look flipped.,.
– JonMark Perry
Dec 29 '18 at 18:20
NOTE: Minor tweak made to first image.
– Frpzzd
Dec 29 '18 at 18:26
Meaning the axis of rotation is horizontal?
– Dr Xorile
Dec 29 '18 at 19:10
|
show 1 more comment
was the flip horizontal or vertical?
– JonMark Perry
Dec 29 '18 at 18:19
1
@JonMarkPerry Horizontal. I had a feeling someone would ask that. :)
– Frpzzd
Dec 29 '18 at 18:19
yeah, coz the paper itself doesn't look flipped.,.
– JonMark Perry
Dec 29 '18 at 18:20
NOTE: Minor tweak made to first image.
– Frpzzd
Dec 29 '18 at 18:26
Meaning the axis of rotation is horizontal?
– Dr Xorile
Dec 29 '18 at 19:10
was the flip horizontal or vertical?
– JonMark Perry
Dec 29 '18 at 18:19
was the flip horizontal or vertical?
– JonMark Perry
Dec 29 '18 at 18:19
1
1
@JonMarkPerry Horizontal. I had a feeling someone would ask that. :)
– Frpzzd
Dec 29 '18 at 18:19
@JonMarkPerry Horizontal. I had a feeling someone would ask that. :)
– Frpzzd
Dec 29 '18 at 18:19
yeah, coz the paper itself doesn't look flipped.,.
– JonMark Perry
Dec 29 '18 at 18:20
yeah, coz the paper itself doesn't look flipped.,.
– JonMark Perry
Dec 29 '18 at 18:20
NOTE: Minor tweak made to first image.
– Frpzzd
Dec 29 '18 at 18:26
NOTE: Minor tweak made to first image.
– Frpzzd
Dec 29 '18 at 18:26
Meaning the axis of rotation is horizontal?
– Dr Xorile
Dec 29 '18 at 19:10
Meaning the axis of rotation is horizontal?
– Dr Xorile
Dec 29 '18 at 19:10
|
show 1 more comment
1 Answer
1
active
oldest
votes
The puzzle is a
slitherlink
but played on a
torus board, i.e. one where the edges wrap around.
From the snake on the back you can see that the left/right edges map exactly onto one another (regardless of how the rectangular paper is turned over, the snake shows short sides match). The top/bottom edges however don't map directly, but are slightly shifted. There are two ways they could connect, because there are two grid points directly on the top/bottom edges. After filling in the walls of the lower 3 square, the partial square below it has two walls. It therefore becomes clear that this square cannot be the 1 in the top row. The square below the bottom 3 must therefore be the 3 in the top row.
Once this mapping is known, it is just a matter of solving the slitherlink puzzle. It is straightforward, but slightly confusing due to the wrapping. Here is the solution, copied a few times to show the edge mapping.
answered Dec 29 '18 at 19:22
Jaap Scherphuis
14.8k12565
Interesting, but not the solution I had in mind. I have added a hint to the question that gives a little bit more information.
– Frpzzd
Dec 29 '18 at 19:56
add a comment |
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1 Answer
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1 Answer
1
active
oldest
votes
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oldest
votes
active
oldest
votes
The puzzle is a
slitherlink
but played on a
torus board, i.e. one where the edges wrap around.
From the snake on the back you can see that the left/right edges map exactly onto one another (regardless of how the rectangular paper is turned over, the snake shows short sides match). The top/bottom edges however don't map directly, but are slightly shifted. There are two ways they could connect, because there are two grid points directly on the top/bottom edges. After filling in the walls of the lower 3 square, the partial square below it has two walls. It therefore becomes clear that this square cannot be the 1 in the top row. The square below the bottom 3 must therefore be the 3 in the top row.
Once this mapping is known, it is just a matter of solving the slitherlink puzzle. It is straightforward, but slightly confusing due to the wrapping. Here is the solution, copied a few times to show the edge mapping.
answered Dec 29 '18 at 19:22
Jaap Scherphuis
14.8k12565
Interesting, but not the solution I had in mind. I have added a hint to the question that gives a little bit more information.
– Frpzzd
Dec 29 '18 at 19:56
add a comment |
The puzzle is a
slitherlink
but played on a
torus board, i.e. one where the edges wrap around.
From the snake on the back you can see that the left/right edges map exactly onto one another (regardless of how the rectangular paper is turned over, the snake shows short sides match). The top/bottom edges however don't map directly, but are slightly shifted. There are two ways they could connect, because there are two grid points directly on the top/bottom edges. After filling in the walls of the lower 3 square, the partial square below it has two walls. It therefore becomes clear that this square cannot be the 1 in the top row. The square below the bottom 3 must therefore be the 3 in the top row.
Once this mapping is known, it is just a matter of solving the slitherlink puzzle. It is straightforward, but slightly confusing due to the wrapping. Here is the solution, copied a few times to show the edge mapping.
answered Dec 29 '18 at 19:22
Jaap Scherphuis
14.8k12565
Interesting, but not the solution I had in mind. I have added a hint to the question that gives a little bit more information.
– Frpzzd
Dec 29 '18 at 19:56
add a comment |
The puzzle is a
slitherlink
but played on a
torus board, i.e. one where the edges wrap around.
From the snake on the back you can see that the left/right edges map exactly onto one another (regardless of how the rectangular paper is turned over, the snake shows short sides match). The top/bottom edges however don't map directly, but are slightly shifted. There are two ways they could connect, because there are two grid points directly on the top/bottom edges. After filling in the walls of the lower 3 square, the partial square below it has two walls. It therefore becomes clear that this square cannot be the 1 in the top row. The square below the bottom 3 must therefore be the 3 in the top row.
Once this mapping is known, it is just a matter of solving the slitherlink puzzle. It is straightforward, but slightly confusing due to the wrapping. Here is the solution, copied a few times to show the edge mapping.
answered Dec 29 '18 at 19:22
Jaap Scherphuis
14.8k12565
The puzzle is a
slitherlink
but played on a
torus board, i.e. one where the edges wrap around.
From the snake on the back you can see that the left/right edges map exactly onto one another (regardless of how the rectangular paper is turned over, the snake shows short sides match). The top/bottom edges however don't map directly, but are slightly shifted. There are two ways they could connect, because there are two grid points directly on the top/bottom edges. After filling in the walls of the lower 3 square, the partial square below it has two walls. It therefore becomes clear that this square cannot be the 1 in the top row. The square below the bottom 3 must therefore be the 3 in the top row.
Once this mapping is known, it is just a matter of solving the slitherlink puzzle. It is straightforward, but slightly confusing due to the wrapping. Here is the solution, copied a few times to show the edge mapping.
answered Dec 29 '18 at 19:22
Jaap Scherphuis
14.8k12565
edited Dec 29 '18 at 19:39
answered Dec 29 '18 at 19:22
Jaap Scherphuis
14.8k12565
answered Dec 29 '18 at 19:22
Jaap Scherphuis
14.8k12565
answered Dec 29 '18 at 19:22
Jaap Scherphuis
14.8k12565
14.8k12565
Interesting, but not the solution I had in mind. I have added a hint to the question that gives a little bit more information.
– Frpzzd
Dec 29 '18 at 19:56
add a comment |
Interesting, but not the solution I had in mind. I have added a hint to the question that gives a little bit more information.
– Frpzzd
Dec 29 '18 at 19:56
Interesting, but not the solution I had in mind. I have added a hint to the question that gives a little bit more information.
– Frpzzd
Dec 29 '18 at 19:56
Interesting, but not the solution I had in mind. I have added a hint to the question that gives a little bit more information.
– Frpzzd
Dec 29 '18 at 19:56
add a comment |
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was the flip horizontal or vertical?
– JonMark Perry
Dec 29 '18 at 18:19
1
@JonMarkPerry Horizontal. I had a feeling someone would ask that. :)
– Frpzzd
Dec 29 '18 at 18:19
yeah, coz the paper itself doesn't look flipped.,.
– JonMark Perry
Dec 29 '18 at 18:20
NOTE: Minor tweak made to first image.
– Frpzzd
Dec 29 '18 at 18:26
Meaning the axis of rotation is horizontal?
– Dr Xorile
Dec 29 '18 at 19:10