Thread - Indian Puzzle Championship

@ 2011-06-08 7:35 PM (#4778 - in reply to #2876) (#4778) Top

davmillar

Posts: 44

Country : United States

davmillar posted @ 2011-06-08 7:35 PM

Hey everyone. Today on The Griddle I posted a new puzzle that may serve as good practice for the masyu-fence puzzle:

Shotgun Slitherlink

In this variation there's one additional twist: all the numeric clues consist of a 2 directly to the left of a 3, to form several instances of "23" throughout the grid. Every place that a 23 can legally be placed in the grid, the clues are given.

I also have additional masyu-fence puzzles (that I call "shotgun slitherlink") on my site which you can find here.

Happy puzzling!

Edited by davmillar 2011-06-08 7:36 PM

@ 2011-06-08 7:41 PM (#4779 - in reply to #2876) (#4779) Top

debmohanty

Country : India

debmohanty posted @ 2011-06-08 7:41 PM

Thanks David, I'm sure it will be useful practice to all.

@ 2011-06-08 9:53 PM (#4780 - in reply to #4779) (#4780) Top

vopani

Posts: 739

Country : India

vopani posted @ 2011-06-08 9:53 PM

Any particular reason puzzles of Round 2 are 20x20? I understand the concept is big grids, but was 20 chosen as a random round figure or does it have any significance? Just for trivia sake...

@ 2011-06-08 10:07 PM (#4781 - in reply to #4780) (#4781) Top

Organisers

Posts: 175

Country : India

Organisers posted @ 2011-06-08 10:07 PM

Rohan Rao - 2011-06-08 9:53 PM

Any particular reason puzzles of Round 2 are 20x20? I understand the concept is big grids, but was 20 chosen as a random round figure or does it have any significance? Just for trivia sake...

Guesses from others welcome!

@ 2011-06-08 11:59 PM (#4782 - in reply to #4781) (#4782) Top

neerajmehrotra

Posts: 328

Country : India

neerajmehrotra posted @ 2011-06-08 11:59 PM

Organisers - 2011-06-08 10:07 PM

Guesses from others welcome!

20-20.........WE are heading for sudoku premier league...

@ 2011-06-09 9:41 AM (#4783 - in reply to #2876) (#4783) Top

rajeshk

Posts: 542

Country : India

rajeshk posted @ 2011-06-09 9:41 AM

Some of the puzzles for practice can be found as below
Diagonally Magic Squares
http://www.wpcstylepuzzles.com/search/label/Diagonally%20Magic%20Sq...

Every Second Straight
http://www.wpcstylepuzzles.com/search/label/Every%20Second%20Straig...

Trid (This appeared in OAPC Championships)
http://www.wpcstylepuzzles.com/search/label/Trid?max-results=4

Fences
http://www.wpcpuzzlesonline.com/puzzles/slither-links

Kakuro
http://www.wpcpuzzlesonline.com/puzzles/kakuro

Every Second Breakpoint
http://www.wpcpuzzlesonline.com/puzzles/every-second-breakpoint

Tapa
http://www.wpcstylepuzzles.com/search/label/Tapa?max-results=4

Also most of the puzzles can be found at
http://www.janko.at/Raetsel/index.htm

@ 2011-06-09 9:49 AM (#4784 - in reply to #4782) (#4784) Top

vopani

Posts: 739

Country : India

vopani posted @ 2011-06-09 9:49 AM

neerajmehrotra - 2011-06-08 11:59 PM

20-20.........WE are heading for sudoku premier league...

20 puzzles in Round1, 20x20 size grids in Round2, 20 puzzles in Round3, I knew something was up!
The Nov-2011 WPC in Hungary is the 20th WPC, so thats why. And also because I am 20 years old ;)

@ 2011-06-09 6:03 PM (#4796 - in reply to #2876) (#4796) Top

rajeshk

Posts: 542

Country : India

rajeshk posted @ 2011-06-09 6:03 PM

Tiger in the Woods
One rule I wanted to confirm that, can the ending square be in the middle or it should always be touching a wall?
e.g. attaching the puzzles from Brazil Puzzle Championship where ending square is not touching the wall or black square.
See the following answer booklet
https://docs.google.com/viewer?a=v&pid=explorer&chrome=true&srcid=12...

@ 2011-06-09 6:21 PM (#4797 - in reply to #2876) (#4797) Top

sanket

Posts: 17

Country : India

sanket posted @ 2011-06-09 6:21 PM

okay..is this solution possible for the given 'tiger in the woods' example given in the IB ?

@ 2011-06-09 6:50 PM (#4798 - in reply to #4797) (#4798) Top

Tejal Phatak

Posts: 81

Country : India

Tejal Phatak posted @ 2011-06-09 6:50 PM

I think the players want to know if the ending cell can be 'anywhere'. There can be another solution then.

(TITW.png)

Attachments
----------------

TITW.png (5KB - 0 downloads)

@ 2011-06-09 6:54 PM (#4799 - in reply to #4798) (#4799) Top

debmohanty

Country : India

debmohanty posted @ 2011-06-09 6:54 PM

This is not allowed. The path can stop only near the wall or a black square.
Also, the end point must not have visited earlier.

@ 2011-06-09 7:12 PM (#4800 - in reply to #2876) (#4800) Top

rajeshk

Posts: 542

Country : India

rajeshk posted @ 2011-06-09 7:12 PM

Thanks Deb for quickly clarifying on this.

@ 2011-06-10 11:53 PM (#4801 - in reply to #2876) (#4801) Top

sanket

Posts: 17

Country : India

sanket posted @ 2011-06-10 11:53 PM

Personally speaking,Im finding 'First or Last' completely unsolvable !
Cant even figure how to start the sample puzzle
Can anyone throw some light? (i know its too late,yet just an attempt)
Thanks anyway.
All the best everyone

@ 2011-06-11 6:23 PM (#4804 - in reply to #4801) (#4804) Top

neerajmehrotra

Posts: 328

Country : India

neerajmehrotra posted @ 2011-06-11 6:23 PM

sanket - 2011-06-10 11:53 PM

Personally speaking,Im finding 'First or Last' completely unsolvable !
Cant even figure how to start the sample puzzle
Can anyone throw some light? (i know its too late,yet just an attempt)
Thanks anyway.
All the best everyone

Look at all rows and coloumns with A and B as clues.....
means R1, R2, C2, C4
C cannot be placed in 1 and last cells of these rows and columns...
with this C cannot be placed in R1C1, R1C4, R2C1, R2C4 therefore in first two rows C has to be in second and third column.
Again with the same logic C cannot be placed at R1C2, thus place C at R1C3 & R2C2.....
Now its simple.

@ 2011-06-11 6:51 PM (#4805 - in reply to #4804) (#4805) Top

sanket

Posts: 17

Country : India

sanket posted @ 2011-06-11 6:51 PM

hey thanks for explanation neeraj :)

@ 2011-06-11 7:40 PM (#4809 - in reply to #4805) (#4809) Top

neerajmehrotra

Posts: 328

Country : India

neerajmehrotra posted @ 2011-06-11 7:40 PM

sanket - 2011-06-11 6:51 PM

hey thanks for explanation neeraj :)

Hope it helped...

@ 2011-06-15 1:55 PM (#4863 - in reply to #2876) (#4863) Top

rakesh_rai

Posts: 774

Country : India

rakesh_rai posted @ 2011-06-15 1:55 PM

I was solving the puzzles of Offline finals Round 3. I managed to solve all except NEWS (I tried the small one only, without success) and the big frameless (which I will need to solve on paper). Overall, very nice puzzles. For me, the best of the lot were the polyword (took a lot of time for solving), creek (elegant solution) and digit battleships (nice play with numbers) - the bigger grid in each case.

I hope someone can help with some baby steps for the small grid of NEWS.

@ 2011-06-15 4:48 PM (#4865 - in reply to #4863) (#4865) Top

vopani

Posts: 739

Country : India

vopani posted @ 2011-06-15 4:48 PM

rakesh_rai - 2011-06-15 1:55 PM

I was solving the puzzles of Offline finals Round 3. I managed to solve all except NEWS (I tried the small one only, without success) and the big frameless (which I will need to solve on paper). Overall, very nice puzzles. For me, the best of the lot were the polyword (took a lot of time for solving), creek (elegant solution) and digit battleships (nice play with numbers) - the bigger grid in each case.

I hope someone can help with some baby steps for the small grid of NEWS.

Hi Rakesh,

According to me, you are not thinking :-)

1: Look at the R2C5-R3C4-R3C5 region. It cannot have 'W' and 'N'. So 'E' will be in R2C5 and 'S' in R3C4.
2: Exactly similarly, the R4C3-R5C2-R5C3 region will have 'E' in R4C3 and 'S' in R5C2.
3: The square region with 'W' has to have a 'N' in R2C3.
4: The R3C1-R4C1-R4C2 region cannot have 'E' and 'W'. Hence R3C1 is 'N' and R4C1 is 'S'.

You should be able to complete it now.

@ 2011-06-15 5:31 PM (#4866 - in reply to #4865) (#4866) Top

rakesh_rai

Posts: 774

Country : India

rakesh_rai posted @ 2011-06-15 5:31 PM

Thanks Rohan.

I was actually thinking

...but I had not interpreted the rules correctly (even though this topic was discussed earlier)...I was thinking that a S can come below a W... I thought the only constraints are that W should be to the left of E and N should be above S...but thats not correct...I should be able to solve it now.


	@ 2011-06-08 7:35 PM (#4778 - in reply to #2876) (#4778) Top
davmillar Posts: 44 Country : United States	davmillar posted @ 2011-06-08 7:35 PM Hey everyone. Today on The Griddle I posted a new puzzle that may serve as good practice for the masyu-fence puzzle: Shotgun Slitherlink In this variation there's one additional twist: all the numeric clues consist of a 2 directly to the left of a 3, to form several instances of "23" throughout the grid. Every place that a 23 can legally be placed in the grid, the clues are given. I also have additional masyu-fence puzzles (that I call "shotgun slitherlink") on my site which you can find here. Happy puzzling! Edited by davmillar 2011-06-08 7:36 PM
	@ 2011-06-08 7:41 PM (#4779 - in reply to #2876) (#4779) Top
debmohanty Country : India	debmohanty posted @ 2011-06-08 7:41 PM Thanks David, I'm sure it will be useful practice to all.
	@ 2011-06-08 9:53 PM (#4780 - in reply to #4779) (#4780) Top
vopani Posts: 739 Country : India	vopani posted @ 2011-06-08 9:53 PM Any particular reason puzzles of Round 2 are 20x20? I understand the concept is big grids, but was 20 chosen as a random round figure or does it have any significance? Just for trivia sake...
	@ 2011-06-08 10:07 PM (#4781 - in reply to #4780) (#4781) Top
Organisers Posts: 175 Country : India	Organisers posted @ 2011-06-08 10:07 PM Rohan Rao - 2011-06-08 9:53 PM Any particular reason puzzles of Round 2 are 20x20? I understand the concept is big grids, but was 20 chosen as a random round figure or does it have any significance? Just for trivia sake... Guesses from others welcome!
	@ 2011-06-08 11:59 PM (#4782 - in reply to #4781) (#4782) Top
neerajmehrotra Posts: 328 Country : India	neerajmehrotra posted @ 2011-06-08 11:59 PM Organisers - 2011-06-08 10:07 PM Rohan Rao - 2011-06-08 9:53 PM Any particular reason puzzles of Round 2 are 20x20? I understand the concept is big grids, but was 20 chosen as a random round figure or does it have any significance? Just for trivia sake... Guesses from others welcome! 20-20.........WE are heading for sudoku premier league...
	@ 2011-06-09 9:41 AM (#4783 - in reply to #2876) (#4783) Top
rajeshk Posts: 542 Country : India	rajeshk posted @ 2011-06-09 9:41 AM Some of the puzzles for practice can be found as below Diagonally Magic Squares http://www.wpcstylepuzzles.com/search/label/Diagonally%20Magic%20Sq... Every Second Straight http://www.wpcstylepuzzles.com/search/label/Every%20Second%20Straig... Trid (This appeared in OAPC Championships) http://www.wpcstylepuzzles.com/search/label/Trid?max-results=4 Fences http://www.wpcpuzzlesonline.com/puzzles/slither-links Kakuro http://www.wpcpuzzlesonline.com/puzzles/kakuro Every Second Breakpoint http://www.wpcpuzzlesonline.com/puzzles/every-second-breakpoint Tapa http://www.wpcstylepuzzles.com/search/label/Tapa?max-results=4 Also most of the puzzles can be found at http://www.janko.at/Raetsel/index.htm
	@ 2011-06-09 9:49 AM (#4784 - in reply to #4782) (#4784) Top
vopani Posts: 739 Country : India	vopani posted @ 2011-06-09 9:49 AM neerajmehrotra - 2011-06-08 11:59 PM Rohan Rao - 2011-06-08 9:53 PM Any particular reason puzzles of Round 2 are 20x20? I understand the concept is big grids, but was 20 chosen as a random round figure or does it have any significance? Just for trivia sake... 20-20.........WE are heading for sudoku premier league... 20 puzzles in Round1, 20x20 size grids in Round2, 20 puzzles in Round3, I knew something was up! The Nov-2011 WPC in Hungary is the 20th WPC, so thats why. And also because I am 20 years old ;)
	@ 2011-06-09 6:03 PM (#4796 - in reply to #2876) (#4796) Top
rajeshk Posts: 542 Country : India	rajeshk posted @ 2011-06-09 6:03 PM Tiger in the Woods One rule I wanted to confirm that, can the ending square be in the middle or it should always be touching a wall? e.g. attaching the puzzles from Brazil Puzzle Championship where ending square is not touching the wall or black square. See the following answer booklet https://docs.google.com/viewer?a=v&pid=explorer&chrome=true&srcid=12...
	@ 2011-06-09 6:21 PM (#4797 - in reply to #2876) (#4797) Top
sanket Posts: 17 Country : India	sanket posted @ 2011-06-09 6:21 PM okay..is this solution possible for the given 'tiger in the woods' example given in the IB ?
	@ 2011-06-09 6:50 PM (#4798 - in reply to #4797) (#4798) Top
Tejal Phatak Posts: 81 Country : India	Tejal Phatak posted @ 2011-06-09 6:50 PM I think the players want to know if the ending cell can be 'anywhere'. There can be another solution then. (TITW.png) Attachments ---------------- TITW.png (5KB - 0 downloads)
	@ 2011-06-09 6:54 PM (#4799 - in reply to #4798) (#4799) Top
debmohanty Country : India	debmohanty posted @ 2011-06-09 6:54 PM This is not allowed. The path can stop only near the wall or a black square. Also, the end point must not have visited earlier.
	@ 2011-06-09 7:12 PM (#4800 - in reply to #2876) (#4800) Top
rajeshk Posts: 542 Country : India	rajeshk posted @ 2011-06-09 7:12 PM Thanks Deb for quickly clarifying on this.
	@ 2011-06-10 11:53 PM (#4801 - in reply to #2876) (#4801) Top
sanket Posts: 17 Country : India	sanket posted @ 2011-06-10 11:53 PM Personally speaking,Im finding 'First or Last' completely unsolvable ! Cant even figure how to start the sample puzzle Can anyone throw some light? (i know its too late,yet just an attempt) Thanks anyway. All the best everyone
	@ 2011-06-11 6:23 PM (#4804 - in reply to #4801) (#4804) Top
neerajmehrotra Posts: 328 Country : India	neerajmehrotra posted @ 2011-06-11 6:23 PM sanket - 2011-06-10 11:53 PM Personally speaking,Im finding 'First or Last' completely unsolvable ! Cant even figure how to start the sample puzzle Can anyone throw some light? (i know its too late,yet just an attempt) Thanks anyway. All the best everyone Look at all rows and coloumns with A and B as clues..... means R1, R2, C2, C4 C cannot be placed in 1 and last cells of these rows and columns... with this C cannot be placed in R1C1, R1C4, R2C1, R2C4 therefore in first two rows C has to be in second and third column. Again with the same logic C cannot be placed at R1C2, thus place C at R1C3 & R2C2..... Now its simple.
	@ 2011-06-11 6:51 PM (#4805 - in reply to #4804) (#4805) Top
sanket Posts: 17 Country : India	sanket posted @ 2011-06-11 6:51 PM hey thanks for explanation neeraj :)
	@ 2011-06-11 7:40 PM (#4809 - in reply to #4805) (#4809) Top
neerajmehrotra Posts: 328 Country : India	neerajmehrotra posted @ 2011-06-11 7:40 PM sanket - 2011-06-11 6:51 PM hey thanks for explanation neeraj :) Hope it helped...
	@ 2011-06-15 1:55 PM (#4863 - in reply to #2876) (#4863) Top
rakesh_rai Posts: 774 Country : India	rakesh_rai posted @ 2011-06-15 1:55 PM I was solving the puzzles of Offline finals Round 3. I managed to solve all except NEWS (I tried the small one only, without success) and the big frameless (which I will need to solve on paper). Overall, very nice puzzles. For me, the best of the lot were the polyword (took a lot of time for solving), creek (elegant solution) and digit battleships (nice play with numbers) - the bigger grid in each case. I hope someone can help with some baby steps for the small grid of NEWS.
	@ 2011-06-15 4:48 PM (#4865 - in reply to #4863) (#4865) Top
vopani Posts: 739 Country : India	vopani posted @ 2011-06-15 4:48 PM rakesh_rai - 2011-06-15 1:55 PM I was solving the puzzles of Offline finals Round 3. I managed to solve all except NEWS (I tried the small one only, without success) and the big frameless (which I will need to solve on paper). Overall, very nice puzzles. For me, the best of the lot were the polyword (took a lot of time for solving), creek (elegant solution) and digit battleships (nice play with numbers) - the bigger grid in each case. I hope someone can help with some baby steps for the small grid of NEWS. Hi Rakesh, According to me, you are not thinking :-) 1: Look at the R2C5-R3C4-R3C5 region. It cannot have 'W' and 'N'. So 'E' will be in R2C5 and 'S' in R3C4. 2: Exactly similarly, the R4C3-R5C2-R5C3 region will have 'E' in R4C3 and 'S' in R5C2. 3: The square region with 'W' has to have a 'N' in R2C3. 4: The R3C1-R4C1-R4C2 region cannot have 'E' and 'W'. Hence R3C1 is 'N' and R4C1 is 'S'. You should be able to complete it now.
	@ 2011-06-15 5:31 PM (#4866 - in reply to #4865) (#4866) Top
rakesh_rai Posts: 774 Country : India	rakesh_rai posted @ 2011-06-15 5:31 PM Thanks Rohan. I was actually thinking ...but I had not interpreted the rules correctly (even though this topic was discussed earlier)...I was thinking that a S can come below a W... I thought the only constraints are that W should be to the left of E and N should be above S...but thats not correct...I should be able to solve it now.