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The most difficult 9x9: Fully analytical, step by step https://www.calcudoku.org/forum/viewtopic.php?f=3&t=436 |
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Author: | bram [ Mon Apr 29, 2013 1:08 am ] |
Post subject: | Re: The most difficult 9x9: Fully analytical, step by step |
clm, thank you for this most impressive, complete step-by-step demonstration! It very clearly illustrates how much can be achieved through analysis. (You may have answered this before, but which software did you use for creating the graphics?) Remember, though, that you should never feel like you are under any kind of obligation to pour the amount of time and effort needed to make these instructive graphics into explaining the intricacies of solving advanced puzzles to the rest of us. I am saying this because I am myself trying (not too successfully so far) to go on a calcudoku hiatus as part of an effort to reclaim my real, off-screen life. Interesting as it is, calcudoku may consume a large amount of time, either because you're struggling with the hardest puzzles (like I am) or because you're kind enough to take the time needed to guide others through the maze (like you are) |
Author: | clm [ Mon Apr 29, 2013 11:33 am ] |
Post subject: | Re: The most difficult 9x9: Fully analytical, step by step |
bram wrote: clm, thank you for this most impressive, complete step-by-step demonstration! It very clearly illustrates how much can be achieved through analysis. (You may have answered this before, but which software did you use for creating the graphics?) Remember, though, that you should never feel like you are under any kind of obligation to pour the amount of time and effort needed to make these instructive graphics into explaining the intricacies of solving advanced puzzles to the rest of us. I am saying this because I am myself trying (not too successfully so far) to go on a calcudoku hiatus as part of an effort to reclaim my real, off-screen life. Interesting as it is, calcudoku may consume a large amount of time, either because you're struggling with the hardest puzzles (like I am) or because you're kind enough to take the time needed to guide others through the maze (like you are) Thank you, bram, for your comments and interest, it´s very encouraging for me to see that there are players so patient to finish the full explanation, I always think in how to make the posts more simple, clear and attractive for the reader though sometimes, and due to the complexity of the puzzle, it's difficult to reduce at the same time the required number of graphics. I only use the program "Paint", the standard accesory provided by Windows, I just "cut" the printed (in Adobe Reader) puzzle and paste it to the "Paint" worksheet then I play on it by adding (with the standard tools) the numbers, fonts, sizes, colours, lines, etc., saving all necessary graphics (using several intermediate graphics in order to keep the previous work) in the ".png" format which occupies less memory and it's easier and faster to upload to the "ImageShack". I agree with you that it's time consuming and of very low priority (in life) but from time to time I must admit that I feel the "compulsion" to prepare one of these posts, when I have been "touché" by the extraordinary beauty of the puzzle, due to its internal structure, etc., other times just to make a modest contribution to the curiosity (that I share) of some particular player, etc., in general it's like a fight againts the computer, against the Patrick's software that, depending on the "level of difficulty", "thinks" in how to place the numbers and cages in the most difficult positions to challenge the calcudokers. And it is true that often the computer "finds" those "magic" positions!!!. Finally I must say that one feels really good when a post like 'Full tables: "mod function" and "bitwise OR" (in the 8x8's)' (in this same section "Solving strategies and tips") has got 5,600 views what means that it's being useful to the new players. (Btw, I hope to overpass one day the most visited "Any suggestions?" in the section "Calcudoku General"). |
Author: | sjs34 [ Mon Apr 29, 2013 3:41 pm ] |
Post subject: | Re: The most difficult 9x9: Fully analytical, step by step |
Another expression of appreciation to clm. As long as it pleases you to create your explanations, it pleases me to receive them. They are very elegant and helpful. |
Author: | bram [ Mon Apr 29, 2013 5:24 pm ] |
Post subject: | Re: The most difficult 9x9: Fully analytical, step by step |
clm wrote: (…) Patrick's software that, depending on the "level of difficulty", "thinks" in how to place the numbers and cages in the most difficult positions to challenge the calcudokers. And it is true that often the computer "finds" those "magic" positions!!!. Yes, it is nice that even though the puzzles are constructed by an algorithm, surprisingly often they contain a special twist somewhere that makes them look human-made. clm wrote: Finally I must say that one feels really good when a post like 'Full tables: "mod function" and "bitwise OR" (in the 8x8's)' (in this same section "Solving strategies and tips") has got 5,600 views what means that it's being useful to the new players. Wow, I didn't notice that one before! But then I haven't been a frequent guest to the "Solving strategies and tips" section. Very nice work indeed and a must-read, especially for puzzlers without prior knowledge of bitwise OR. I hope it will soon reach its well-deserved Most Viewed Post Ever status |
Author: | beaker [ Mon Apr 29, 2013 7:23 pm ] |
Post subject: | Re: The most difficult 9x9: Fully analytical, step by step |
I have been using the bitwise and mod tables since clm published them because I don't understand them (however I do now "get" the mod puzzles more easily)......I have thanked clm in the past and will now take the opportunity to thank him once more.......1/2kenken |
Author: | clm [ Tue Apr 30, 2013 4:38 pm ] |
Post subject: | Re: The most difficult 9x9: Fully analytical, step by step |
sjs34 wrote: Another expression of appreciation to clm. As long as it pleases you to create your explanations, it pleases me to receive them. They are very elegant and helpful. Thank you very much for your kindness (and coming from the 6th player in the World's all time ranking!!! ... who at the same time has been enough humble to demand strategies for this specific puzzle ... ), it's very pleasant to hear that the explanations have been helpful. |
Author: | clm [ Tue Apr 30, 2013 5:08 pm ] |
Post subject: | Re: The most difficult 9x9: Fully analytical, step by step |
beaker wrote: I have been using the bitwise and mod tables since clm published them because I don't understand them (however I do now "get" the mod puzzles more easily)......I have thanked clm in the past and will now take the opportunity to thank him once more.......1/2kenken Thanks again, beaker. Btw, you will soon get the bitwise OR as well. It's just a question of having in mind the binary expression of the numbers 1 thru 15 and how the bitwise OR operation proceeds with every pair of bits ("keeping" them in their original positions), for instance: 3 = 0011 5 = 0101 ________ = 0111 = 7 (this is the binary expression for the number 7), that is, 3 bitwise OR 5 (or viceversa since the bitwise OR is conmutative) = 7. For the bitwise OR just operate the numbers "in vertical", considering that 0 bitwise OR 0 = 0, the other three operations produce a 1, that is, 0 bitwise OR 1 = 1; 1 bitwise OR 0 = 1 and 1 bitwise OR 1 = 1. In this way you will understand the full tables and, what is preferable, how the operation works. |
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