SM 2024 R3 - Math & Neighbours (5^{th} - 11^{th} Apr) Score •Discuss

Riad's April Contest 2024 (13^{th} - 21^{st} April) has started •Discuss

Riad's April Contest 2024 (13

Country : India |
Coming Soon! |

@ 2018-04-02 10:20 AM (#24609 - in reply to #24577) (#24609) Top | |

Country : India |
## Some notes about April ContestPlease note this contest will have a slightly different format than regular LMI tests.Key differences from regular LMI tests: • There is no IB (i.e. no Instructions Booklet). If you have any questions about any puzzle, please ask here. • The PB (Puzzle Booklet) does not have any password. • You can download the pdf and start solving. Login at the contest page to start submitting. • There is no time limit. You can submit until the contest ends. • There will be some optimizer puzzles. Other puzzles will be very hard (compared to regular LMI tests) • Same scores will have same rank (i.e. early submissions do not count towards rank) |

@ 2018-04-02 6:20 PM (#24622 - in reply to #24577) (#24622) Top | |

Posts: 61 Country : France |
Hello everybody, I'm really impatient ... Can we know what time PB will be available online? |

@ 2018-04-02 8:39 PM (#24624 - in reply to #24622) (#24624) Top | |

Country : India |
## Puzzle BookletThe PB should be available at 12 PM Moscow time (0900 GMT) on April 3rd. |

@ 2018-04-03 2:32 PM (#24630 - in reply to #24577) (#24630) Top | |

Country : India |
The test has started and PB is available now. |

@ 2018-04-03 7:00 PM (#24632 - in reply to #24577) (#24632) Top | |

Posts: 315 Country : The Netherlands |
For 10. Does minimum mean the amount of digits or the sum of their values? For 11. Can you place a black triangle in a given cell with a triangle to turn it into a fully black cell? Edited by Para 2018-04-03 7:06 PM |

@ 2018-04-03 7:21 PM (#24633 - in reply to #24632) (#24633) Top | |

Posts: 216 Country : Russia |
Para - 2018-04-03 7:00 PM For 10. Does minimum mean the amount of digits or the sum of their values? For 11. Can you place a black triangle in a given cell with a triangle to turn it into a fully black cell? 10. Minimize the sum by using fewer digits. 11. Yes. |

@ 2018-04-03 7:36 PM (#24634 - in reply to #24633) (#24634) Top | |

Posts: 315 Country : The Netherlands |
Riad Khanmagomedov - 2018-04-03 7:21 PM Para - 2018-04-03 7:00 PM For 10. Does minimum mean the amount of digits or the sum of their values? For 11. Can you place a black triangle in a given cell with a triangle to turn it into a fully black cell? 10. Minimize the sum by using fewer digits. 11. Yes. Sorry, my bad for not clarifying well enough. I meant for when two solutions are tied for score. It says the minimum digits. Does this mean the solution with fewest digits used or the solution with the lowest sum of the digits used. |

@ 2018-04-03 11:52 PM (#24638 - in reply to #24634) (#24638) Top | |

Country : India |
## Puzzle 10 - Minor changesThere are few changes suggested by the author. An updated PB shall be uploaded on April 4th. Number Range Numbers from 1 to 5 can be used in coloured cells. Four sets of numbers from 1 to 5 are available. 6 and 7 cannot be used. Ranking Criteria - Minimum Value of (A+2B+3C) wilI be used to rank solutions. - If two solutions have the same value of (A+2B+3C), then the solution using minimum number of digits in coloured cells is considered better. - If two solutions have the same value of (A+2B+3C) AND use the same number of digits in coloured cells, then the solution which has minimum sum of digits in coloured cells is considered better. - If two solutions have the same value of (A+2B+3C) AND use the same number of digits in coloured cells AND have the same sum of digits in coloured cells, they will have the same rank. |

@ 2018-04-04 9:20 AM (#24641 - in reply to #24577) (#24641) Top | |

Posts: 241 Country : Indonesia |
In 11 can the ball cross its own path? |

@ 2018-04-04 12:11 PM (#24642 - in reply to #24577) (#24642) Top | |

Posts: 102 Country : United States |
In 12, is it a requirement to use all pentominoes (i.e. should K always be 8)? If not, should the formula be 2L - K? Otherwise we are penalized for using more pentominoes, and clearly the more pentominoes, the harder it is to have few black cells. |

@ 2018-04-04 1:21 PM (#24643 - in reply to #24641) (#24643) Top | |

Posts: 216 Country : Russia |
chaotic_iak - 2018-04-04 9:20 AM In 11 can the ball cross its own path? No. |

@ 2018-04-04 1:31 PM (#24644 - in reply to #24642) (#24644) Top | |

Posts: 216 Country : Russia |
ghirsch - 2018-04-04 12:11 PM In 12, is it a requirement to use all pentominoes (i.e. should K always be 8)? If not, should the formula be 2L - K? Otherwise we are penalized for using more pentominoes, and clearly the more pentominoes, the harder it is to have few black cells. K is not necessarily equal to 8. Minimize K + 2L. |

@ 2018-04-04 2:06 PM (#24646 - in reply to #24644) (#24646) Top | |

Country : India |
## Updated PBAn updated Puzzle Booklet is now available. |

@ 2018-04-05 7:31 AM (#24648 - in reply to #24644) (#24648) Top | |

Posts: 102 Country : United States |
Riad Khanmagomedov - 2018-04-03 2:31 PM ghirsch - 2018-04-04 12:11 PM In 12, is it a requirement to use all pentominoes (i.e. should K always be 8)? If not, should the formula be 2L - K? Otherwise we are penalized for using more pentominoes, and clearly the more pentominoes, the harder it is to have few black cells. K is not necessarily equal to 8. Minimize K + 2L. Wouldn't the optimal thing trivially be to just use no pentominoes? You can make a loop through all the cells if they are all white, so K and L would both be 0. I feel like I must be missing something. Edited by ghirsch 2018-04-05 7:32 AM |

@ 2018-04-05 7:38 AM (#24649 - in reply to #24577) (#24649) Top | |

Posts: 241 Country : Indonesia |
I think the missing thing is that the solution to 12 must be unique. It should be added to the PB. Edited by chaotic_iak 2018-04-05 7:38 AM |

@ 2018-04-05 7:49 AM (#24650 - in reply to #24577) (#24650) Top | |

Posts: 241 Country : Indonesia |
More questions: 3: For the purposes of lawns, each diagonal segment is of the same length as horizontal/vertical segments? Also, can you go diagonally through a white cell, without any lawn next to you? 4: Can names repeat in the grid? 8: For the cells without slashes, the clues point to the longer direction (the direction with more than 1 cell)? Is it possible to make it more similar to Kakuro, so each square is slashed? |

@ 2018-04-05 9:56 AM (#24651 - in reply to #24643) (#24651) Top | |

Posts: 349 Country : India |
Riad Khanmagomedov - 2018-04-04 1:21 PM chaotic_iak - 2018-04-04 9:20 AM In 11 can the ball cross its own path? No. So this translates to - each half white and fully white cell needs to be visited exactly once? |

@ 2018-04-05 1:30 PM (#24652 - in reply to #24649) (#24652) Top | |

Posts: 216 Country : Russia |
chaotic_iak - 2018-04-05 7:38 AM I think the missing thing is that the solution to 12 must be unique. It should be added to the PB. The loop must be unique! |

@ 2018-04-05 1:38 PM (#24653 - in reply to #24650) (#24653) Top | |

Posts: 216 Country : Russia |
chaotic_iak - 2018-04-05 7:49 AM More questions: 3: For the purposes of lawns, each diagonal segment is of the same length as horizontal/vertical segments? Also, can you go diagonally through a white cell, without any lawn next to you? 4: Can names repeat in the grid? 8: For the cells without slashes, the clues point to the longer direction (the direction with more than 1 cell)? Is it possible to make it more similar to Kakuro, so each square is slashed? 3. Yes. 4. No. 8. Yes, to the longer direction. |

@ 2018-04-05 1:40 PM (#24654 - in reply to #24651) (#24654) Top | |

Posts: 216 Country : Russia |
amitsowani - 2018-04-05 9:56 AM Riad Khanmagomedov - 2018-04-04 1:21 PM chaotic_iak - 2018-04-04 9:20 AM In 11 can the ball cross its own path? No. So this translates to - each half white and fully white cell needs to be visited exactly once? The white cell can be crossed twice. The path should not overlap with itself. |

@ 2018-04-06 12:16 AM (#24656 - in reply to #24654) (#24656) Top | |

Posts: 170 Country : Germany |
For the solution code to puzzle 3, would a diagonal of length 2 be counted as 2 (it's two unit diagonals) or as 0 (it's not a unit diagonal)? |

@ 2018-04-06 3:57 AM (#24657 - in reply to #24577) (#24657) Top | |

Posts: 34 Country : Turkey |
11. Rollball variation. - The ball goes through the centres of all white half cells and all fully white cells. So does it go through all current white cells, or can some of white cells be completely blackened by adding triangles? - "The ball can roll out of the grid or stay inside the grid" Does this sentence refer to the end of the route? Edited by bskbri 2018-04-06 3:58 AM |

@ 2018-04-06 2:29 PM (#24659 - in reply to #24656) (#24659) Top | |

Posts: 216 Country : Russia |
rob - 2018-04-06 12:16 AM For the solution code to puzzle 3, would a diagonal of length 2 be counted as 2 (it's two unit diagonals) or as 0 (it's not a unit diagonal)? The diagonal of length 2 is counted as 2. |

@ 2018-04-06 2:36 PM (#24660 - in reply to #24657) (#24660) Top | |

Posts: 216 Country : Russia |
bskbri - 2018-04-06 3:57 AM 11. Rollball variation. - The ball goes through the centres of all white half cells and all fully white cells. So does it go through all current white cells, or can some of white cells be completely blackened by adding triangles? - "The ball can roll out of the grid or stay inside the grid" Does this sentence refer to the end of the route? 1. First you need to blacken some cells. Then through all the remaining white cells and half cells draw the route. 2. Yes, the end of the route. |