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Posts: 774 ![]() ![]() ![]() ![]() ![]() ![]() Country : India | rakesh_rai posted @ 2015-09-17 5:41 PM 6. TRIMINOES SUDOKU What is different? * No rules are given for this. * But triminoes may be something to do with 3 cells. How to solve * There will be an example given in the Puzzle Booklet. * During the contest, you need to deduce the rules from the example and solve the given sudoku using those same rules. |
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Posts: 774 ![]() ![]() ![]() ![]() ![]() ![]() Country : India | rakesh_rai posted @ 2015-09-18 2:39 PM Covering the rest briefly... 4. DRAW CROSS NUMBER * Cross number is like a crossword - only we have numbers instead of words. * All the "branches" of the crossnumber have to be orthogonally connected. * Mark the cells with cross numbers with circles and those which are not with crosses, for example. (Or you can use two colours also). * Look for clues or set of clues which cover a large part of the row/column, for starting. * For example, in the IB, the 3 in the first column effectively means that R2C1 and R3C1 must be part of the cross number. * Use "1" clues effectively. In the IB, once we find R3C1 as a part of the cross number, we can rule out the other cells in R3 from the cross number. * Larger numbers in clues can lead to us deducing that certain cells MUST be part of the cross number. * Most of the times, in such grids, solving part comes after identification of the cross number cells. But if the sudoku can be solved to some extent, it should be done. 5. MAP SUDOKU * Only the gray cells will be part of map. * Calculate distances between given cells - focusing on the maximum and minimum possible distances. * Try to match the given information on distances with the actual ones on map. * For example, in the IB, it is very obvious that R1C2 and R4C3 have to be C and A respectively. * Once you get a start, try to use ALL given information on distances, eliminate possibilities and complete the map cells. * Also keep solving simultaneously. You may need to switch between solving the sudoku and identifying the map elements at times. 7. MAZE SUDOKU * There have to be 12 cells in each maze. A maze cannot have less than or more than 12 cells. * Based on the given information on walls, we can come up with wall segments which are DEFINITELY present. For example, the 4 clue in the IB. * Use the "continuously visit" logic to eliminate possibilities. There has to be a connected path from 1 to 12 within every maze. * The solving involves confirming and eliminating wall possibilities. * There has to be at least a one cell gap between successive wall segments. * Solve the IB example to get a good idea of the technique involved. |
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![]() ![]() ![]() ![]() ![]() Country : India | Administrator posted @ 2015-09-18 11:30 PM September Sudoku Contest has started• Puzzle booklet (with password) is now available for download.• This thread will be restricted throughout the contest. • Score page - http://logicmastersindia.com/2015/09S/score.asp • In maze sudoku, for two digit numbers (10, 11, 12) enter both digits in the answer key. • Read the rules clearly before starting the contest. • You may also like to go through tips on each variant in this thread, before starting the test. |
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Posts: 1800 ![]() ![]() ![]() ![]() ![]() Country : India | prasanna16391 posted @ 2015-09-20 2:34 AM That was fun. It took me unnecessarily long to spot the Extra Region concept of Position Sudoku. Kept going back to it about 5 times over the contest and kept thinking there's something I'm missing. Typically enough, it struck me with about 3 minutes to go and I couldn't finish on time. Ah well. |
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Posts: 1 Country : India | Priya Jaiswal posted @ 2015-09-20 1:37 PM to inform about all ruls Edited by Priya Jaiswal 2015-09-20 1:38 PM |
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Posts: 774 ![]() ![]() ![]() ![]() ![]() ![]() Country : India | rakesh_rai posted @ 2015-09-20 3:26 PM Priya Jaiswal - 2015-09-20 1:37 PM The question is not clear.to inform about all ruls |
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Posts: 145 ![]() ![]() ![]() Country : France | auroux posted @ 2015-09-22 1:09 AM Right now, I'm mostly upset as I ran out of time while inputting the solution to Flower and missed the points for it by at most 5 seconds... Grrrrrrrrrrr... but it was a really nice test. Thanks a lot Riad for beautiful puzzles. |
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Posts: 234 ![]() ![]() ![]() Country : Russia | Riad Khanmagomedov posted @ 2015-09-22 2:23 AM auroux - 2015-09-22 1:09 AM Right now, I'm mostly upset as I ran out of time while inputting the solution to Flower and missed the points for it by at most 5 seconds... Grrrrrrrrrrr... but it was a really nice test. Thanks a lot Riad for beautiful puzzles. I've been watching you since the 80 th minute you had already 358 points. It seemed to me that Denis is able to overcome the 500-point line. Every 5-10 minutes I updated the page with the results. Now it is clear that become a hindrance to you. Very interesting and unusual to play the role of impartial observer and potential fans however. |
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![]() ![]() ![]() ![]() ![]() Country : India | Administrator posted @ 2015-09-22 7:35 AM The test is now over. |
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Posts: 268 ![]() ![]() ![]() ![]() ![]() Country : India | rvarun posted @ 2015-09-22 11:08 AM Thanks Riad for the wonderfully crafted puzzles. Though I was able to complete only two puzzles, all the types were innovative and a gave good work to our brain cells. |
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Posts: 234 ![]() ![]() ![]() Country : Russia | Riad Khanmagomedov posted @ 2015-09-22 11:51 AM Congratulations to Hideaki, Nikola and Daisuke! I note that Hideaki two years ago, also won with a bonus in September Sudoku Contest. Thanks to all the participants and those who helped in organizing the Contest! Also I want to note the result of Seungjae Kwak, which when tested was within 100 minutes. |