Similar question for Battleships With Line: can a row or column have a longer segment which is partially outside the quadrant, if the portion within the quadrant is below the given maximal length?

There are 6 small Trid puzzles, each has bold borders that are 7 circles long.
Numbers can NOT be repeated along those 7-circle borders, or any other diagonal within the same small triangle.
(it's the same idea as the Sudoku On Cube puzzle, there are 6 little puzzles with individual solutions, but they have identical digits along their common borders)

No, cannot.

OK, thanks. Since the beginning, I had misinterpreted the statement of 'Battleship with Line'. When I finally properly translated, it became (almost) easy ...

Hi. Another question: For optimization problems, I guess you can without penalty propose a first solution, then return it to improve, right?

Yes. There is no penalty.
Your final submission for each puzzle will be considered for scoring.

according to diayajilin rules;

1-digit in a cell shows total number of black cells on its both diagonals
2-or shows total number of black cells on its any diagonals

for example;

digit 2 in a cell and there is 2 black cells on any of its diagonal and there is one black cell on its other diagonal. that is satisfied the rule?

In Diayajilin, if there is a digit "2" in a cell then this is the total of all black cells in both diagonals, added together.

i.e.
there is 1 black in NW-SE diagonal and 1 black in NE-SW diagonal
OR
there is 2 blacks in NW-SE diagonal and 0 blacks in NE-SW diagonal
OR
there is 0 blacks in NW-SE diagonal and 2 blacks in NE-SW diagonal

(but you can NOT have 2 blacks in NW-SE diagonal and 1 black in NE-SW diagonal)

In my line if there is a no 2 is it necessary to have the length of lines equal to 2 on both sides or on side is enough.

both sides its necessary

Hi.
For 'Roman OX', I thought it was possible to use 'X' AND 'O' inside the grid, but the submission page specifies to use only 'X' and '-' ?

Fixed. Your submission was already accepted nevertheless.

For the puzzle 10;

I cannot figure out by equal dimension of figure and grid cells on the given example.
Could you explain pls.

It means that the shapes must cover grid cells exactly. e.g. You cannot place the 1x1 shape to cover half of one grid cell and half of another grid cell.

Another question, about Battleships with Line :
Does the maximum line length have to exist or is it just a maximum ?
In other words, for a row with a 2, do we need to have at least one line of length 2 or only 1 length lines is ok ?

It is needed to have such a lenght.

Hello,
I really enjoyed this contest, with dense and varied problems. As a beginner, I always lack of time to look for problems in the usual competitions. This time, I only missed a little time to improve my optimizations ...
By the way, when can we expect to have the final results?

We still are working on the optimizers (to check correctness of submission). Riad is going to solve all of them soon.

I like how there are essentially only six distinct submissions among those in Roman OX with score less than 200.

The 26x13 was amazing. I tried something similar but couldn't get 6 strands to run zigzagging like that because I ran out of minoes. But I tried it on 26x12; I should have tried 26x13 indeed. My first submission was a 26x8 with a T-tetromino at D1-E1-F1-E2, a monomino at A26, and a L-trimino at G26-H25-H26; something like the 26x8 on the booklet but with less minoes used. And obviously it can be extended at will, so a good thing there's that 26x26 limitation, too. (My submission is different, improved from the above.)

Meanwhile, time to guess the author!

Mine is the second one, 13x23. I could not place the last piece to make the rectangle longer, but even if I could have, the 13x26 would still be so much better. I just didn't think of putting the pieces directly at the left border...

and I am the third with 25*11. did try the 6 loops but could not figure it out.

Sebastian was very good. The top solution is amazing, the idea of leaving out the trimino to respect the parity is fantastic.

At first glance it seems to me that the first two solutions of the arrows are wrong as they do not respect the rule that white cells cannot share an edge. Which may reshuffle substantially the leaderboard for the top positions......

As usual, Riad has pulled out from his hat a set of puzzles of fantastic quality. The astronomer is in my opinion the best puzzle. of the optimizers I like the Pentomino, it has so many possible strategies for getting the extra step. Thanks to Riad and the other organizers.








Edited by forcolin 2014-04-13 7:24 PM

We added the restriction of 26X26 almost at the end because we thought there will be confusion over answer keys entering. But it looks like there would have been much confusion without it.

Yes, those are invalid grids. I missed that rule while making the pdf.