Sudoku Champs Practice Test - U10 & U12 has started Discuss
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April Contest — 5th - 13th April 201361 posts • Page 1 of 3 • 1 2 3
@ 2013-04-05 8:11 PM (#10542 - in reply to #10427) (#10542) Top

forcolin




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forcolin posted @ 2013-04-05 8:11 PM

in n.6 magitori. can cells with letters be blackened?
in n. 8 am i correct assuming that a belt is a snake that forms a closed loop?
@ 2013-04-05 8:19 PM (#10543 - in reply to #10427) (#10543) Top

term



Posts: 8

Country : Greece

term posted @ 2013-04-05 8:19 PM

Star Belt rules are giving me a spot of trouble:
a) Is the belt an open path or a loop?
b) What does "inside the belt mean?" Is it on the belt, in the enclosed space, or the union of the above?
@ 2013-04-05 9:02 PM (#10544 - in reply to #10542) (#10544) Top

Riad Khanmagomedov



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Riad Khanmagomedov posted @ 2013-04-05 9:02 PM

forcolin - 2013-04-05 8:11 PM

in n.6 magitori. can cells with letters be blackened?
in n. 8 am i correct assuming that a belt is a snake that forms a closed loop?

Hi Stefano,

6. About this author silent.
8. Yes, you are correct.
@ 2013-04-05 9:06 PM (#10545 - in reply to #10543) (#10545) Top

Riad Khanmagomedov



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Riad Khanmagomedov posted @ 2013-04-05 9:06 PM

term - 2013-04-05 8:19 PM

Star Belt rules are giving me a spot of trouble:
a) Is the belt an open path or a loop?
b) What does "inside the belt mean?" Is it on the belt, in the enclosed space, or the union of the above?

Inside a closed loop-"snake". Not on the snake.

Edited by Riad Khanmagomedov 2013-04-05 9:18 PM
@ 2013-04-05 9:07 PM (#10546 - in reply to #10427) (#10546) Top

witty



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Country : India

witty posted @ 2013-04-05 9:07 PM

In Heavy Sky, what does 'both size greater than 1' mean?
Does it mean that length and width both should be > 1, or the area should be > 1?
@ 2013-04-05 9:20 PM (#10547 - in reply to #10546) (#10547) Top

Riad Khanmagomedov



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Riad Khanmagomedov posted @ 2013-04-05 9:20 PM

witty - 2013-04-05 9:07 PM

In Heavy Sky, what does 'both size greater than 1' mean?
Does it mean that length and width both should be > 1, or the area should be > 1?

The length and width both should be > 1.
@ 2013-04-05 10:36 PM (#10549 - in reply to #10543) (#10549) Top

Riad Khanmagomedov



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Riad Khanmagomedov posted @ 2013-04-05 10:36 PM

term - 2013-04-05 8:19 PM

Star Belt rules are giving me a spot of trouble:
a) Is the belt an open path or a loop?
b) What does "inside the belt mean?" Is it on the belt, in the enclosed space, or the union of the above?

No stars on the belt.
@ 2013-04-05 10:51 PM (#10550 - in reply to #10427) (#10550) Top

Nehsb



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Country : United States

Nehsb posted @ 2013-04-05 10:51 PM

For Visibility, the puzzle booklet claims it has a point value of 9, but the online submission has it listed as having a point value of 7. Which is correct?
@ 2013-04-06 12:46 PM (#10554 - in reply to #10427) (#10554) Top

witty



Posts: 16

Country : India

witty posted @ 2013-04-06 12:46 PM

For Digital Ornament example, number on the left says 7, but the sum of the numbers in the first two rows is 5 + 1 +2 = 8. Is it because, 1 doesn't lie on the horizontal line dividing row 1 & 2?
@ 2013-04-06 9:52 PM (#10558 - in reply to #10427) (#10558) Top

FoxFireX




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FoxFireX posted @ 2013-04-06 9:52 PM

For Visibility, the answer key shows the "1 or 2 digits" warning when you have two digits entered. Entering a single digit causes the warning to disappear. (Still lets you submit, regardless.)
@ 2013-04-06 10:02 PM (#10559 - in reply to #10558) (#10559) Top

Administrator



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Administrator posted @ 2013-04-06 10:02 PM

FoxFireX - 2013-04-06 9:52 PM

For Visibility, the answer key shows the "1 or 2 digits" warning when you have two digits entered. Entering a single digit causes the warning to disappear. (Still lets you submit, regardless.)
Nehsb - 2013-04-05 10:51 PM

For Visibility, the puzzle booklet claims it has a point value of 9, but the online submission has it listed as having a point value of 7. Which is correct?
Fixed.
@ 2013-04-06 11:12 PM (#10560 - in reply to #10427) (#10560) Top

kishy72



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kishy72 posted @ 2013-04-06 11:12 PM

In Borderless minesweeper there are 4 ways by which a 13 * 13 area can be formed .Which orientation needs to be considered? Also in the example puzzle of the same there is one unaccounted mine which is not part of any clue.How did it come into the picture?
@ 2013-04-07 5:58 AM (#10561 - in reply to #10560) (#10561) Top

Para



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Para posted @ 2013-04-07 5:58 AM

kishy72 - 2013-04-06 11:12 PM

In Borderless minesweeper there are 4 ways by which a 13 * 13 area can be formed .Which orientation needs to be considered? Also in the example puzzle of the same there is one unaccounted mine which is not part of any clue.How did it come into the picture?


Part of the puzzle is to figure out how it has to go.
The total of mines is given. It's the only place the 4th mine can go.
@ 2013-04-11 6:24 AM (#10590 - in reply to #10427) (#10590) Top

kishy72



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kishy72 posted @ 2013-04-11 6:24 AM

In simple loop what does Lengths of two neighboring segments must differ by exactly 1 imply?What are neighbouring segments .Can someone explain how this happens in the example puzzle of the same?For persons who might be misguided in their solve by my earlier comment of 4 orientations ,I (might be) wrong on that . :-p
@ 2013-04-11 6:24 AM (#10591 - in reply to #10427) (#10591) Top

FoxFireX




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FoxFireX posted @ 2013-04-11 6:24 AM

Couple of questions on the optimizers.

For Domino Castle, the answer page notes that "some rows may not be used". Does that mean that if we build the castle into, say, a 12x12 grid, the empty rows/columns don't count against us as the minimum row/column value?

For Tetrasudoku, it's not explicitly stated, but I assume I know the answer: Must the sudoku be solvable at all? That is, is it acceptable to create a puzzle which has no solution, making the value of K=0? (I can't imagine that's okay, but figured I'd bring up the possibility anyway.)
@ 2013-04-11 6:27 AM (#10592 - in reply to #10590) (#10592) Top

FoxFireX




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FoxFireX posted @ 2013-04-11 6:27 AM

kishy72 - 2013-04-10 7:24 PM

In simple loop what does Lengths of two neighboring segments must differ by exactly 1 imply?What are neighbouring segments .Can someone explain how this happens in the example puzzle of the same?For persons who might be misguided in their solve by my earlier comment of 4 orientations ,I (might be) wrong on that . :-p


My reading of it is, you're drawing a single loop that passes through each dot. If you count the length of the line from dot to dot, then that length must go up or down by one from one segment to another as you travel the loop. In the example, if we start with the segment in the upper left of the grid and go clockwise, we start with a segment that's 2 units long. The next is 3 units long, then 2, 1, 2, 1, 2, 1, 2, 3, 2, 3, 2, 3, 4, 3, and back to the original 2 unit segment.
@ 2013-04-11 6:44 AM (#10593 - in reply to #10591) (#10593) Top

Administrator



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Administrator posted @ 2013-04-11 6:44 AM

FoxFireX - 2013-04-11 6:24 AM

Couple of questions on the optimizers.

For Domino Castle, the answer page notes that "some rows may not be used". Does that mean that if we build the castle into, say, a 12x12 grid, the empty rows/columns don't count against us as the minimum row/column value?

For Tetrasudoku, it's not explicitly stated, but I assume I know the answer: Must the sudoku be solvable at all? That is, is it acceptable to create a puzzle which has no solution, making the value of K=0? (I can't imagine that's okay, but figured I'd bring up the possibility anyway.)


Domino Castle : As you see from the example, only 4 rows are used. So it is not necessary to use all the rows.

Tetrasudoku : K > 0. Riad answered this earlier in this thread.
@ 2013-04-11 3:04 PM (#10597 - in reply to #10427) (#10597) Top

swaroop2011




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swaroop2011 posted @ 2013-04-11 3:04 PM

Just to confirm,
In Domino Castle we have to use all dominoes
i.e 1-1,1-2...1-7. ......7-7 so in all "49" dominoes right ?

or is it 1-1,1-2...1-7 then 2-2,2-3..2-7, 3-3.. so in that way 28 dominoes ??

Edited by swaroop2011 2013-04-11 3:06 PM
@ 2013-04-11 4:57 PM (#10599 - in reply to #10427) (#10599) Top

Ours brun




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Ours brun posted @ 2013-04-11 4:57 PM

The standard set is made of 28 different dominoes; I am quite sure that's what we are supposed to use here (like in most domino-based logic puzzles).
@ 2013-04-11 10:20 PM (#10602 - in reply to #10599) (#10602) Top

swaroop2011




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swaroop2011 posted @ 2013-04-11 10:20 PM

Ours brun - 2013-04-11 4:57 PM

The standard set is made of 28 different dominoes; I am quite sure that's what we are supposed to use here (like in most domino-based logic puzzles).


ohk got it thank you :)
@ 2013-04-12 2:45 PM (#10604 - in reply to #10427) (#10604) Top

swaroop2011




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swaroop2011 posted @ 2013-04-12 2:45 PM

In domino Castle,
1) Is it possible to have a 2*2 domino (that is placing two dominoes adjacently) or 3*3 as there is no such restriction mentioned in rules ?
2) can castle walls touch each other at corners again nothing mentioned regarding this in rules ??

Edited by swaroop2011 2013-04-12 2:56 PM
@ 2013-04-12 3:18 PM (#10605 - in reply to #10604) (#10605) Top

Riad Khanmagomedov



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Riad Khanmagomedov posted @ 2013-04-12 3:18 PM

swaroop2011 - 2013-04-12 2:45 PM

In domino Castle,
1) Is it possible to have a 2*2 domino (that is placing two dominoes adjacently) or 3*3 as there is no such restriction mentioned in rules ?
2) can castle walls touch each other at corners again nothing mentioned regarding this in rules ??

You have 28 dominoes. Using all dominoes build a castle. Castle is connected freeform figure.
@ 2013-04-12 4:11 PM (#10606 - in reply to #10604) (#10606) Top

kiwijam



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kiwijam posted @ 2013-04-12 4:11 PM


1) Is it possible to have a 2*2 domino (that is placing two dominoes adjacently)


You can only place two dominoes adjacent (e.g. one above the other) if both left ends match, and both right ends match. You have a set of 28 different dominoes to use, once each...

You have to follow the given rules, but if the rules don't restrict something, then you can do it.
@ 2013-04-12 5:53 PM (#10607 - in reply to #10427) (#10607) Top

Administrator



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Administrator posted @ 2013-04-12 5:53 PM

About Domino Castle : Please note that no domino can be used twice. (So each domino has to be used exactly once.)

We can see that in some submissions, a single domino (e.g. 3,4) is used twice. This is not allowed. Those submissions are invalid, and will not be considered.
@ 2013-04-12 6:01 PM (#10608 - in reply to #10427) (#10608) Top

Administrator



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Administrator posted @ 2013-04-12 6:01 PM

Yet another note about Domino Castle : The task is to minimize the expresses (R-r)^2+(C-c)^2
Not to maximize it. We see a case, where the player has (probably) tried to maximize it.
April Contest — 5th - 13th April 201361 posts • Page 1 of 3 • 1 2 3
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