@ 2010-02-28 1:09 AM (#103 - in reply to #10) (#103) Top | |
mmtronic | mmtronic posted @ 2010-02-28 1:09 AM I started Round1 but (even after many refreshes) don't get page with the flash puzzles to enter answers... Any idea what's wrong? Thx |
@ 2010-02-28 1:18 AM (#104 - in reply to #103) (#104) Top | |
mmtronic | mmtronic posted @ 2010-02-28 1:18 AM mmtronic - 2010-02-28 1:09 AM I started Round1 but (even after many refreshes) don't get page with the flash puzzles to enter answers... Any idea what's wrong? Thx OK, used Chrome and it works there... lost couple of minutes, sigh. :( |
@ 2010-02-28 5:26 AM (#105 - in reply to #98) (#105) Top | |
Country : India | debmohanty posted @ 2010-02-28 5:26 AM Chris, whatever you mentioned about multiple rounds is definitely the best one. Here is my personal opinion :- First of all, I don't like multiple rounds, when it is Online. Players who solve on paper always loose time because of pdf password, printing etc. I would always prefer a single longer round than multiple smaller rounds. |
@ 2010-02-28 7:49 AM (#106 - in reply to #10) (#106) Top | |
Posts: 9 Country : China | Leaf Card posted @ 2010-02-28 7:49 AM thank you for all players who participated in mock test 14 :) for someone metioned why it has two rounds, the two rounds are designed by different people, it's difficult to calculate bouns if we put all puzzles together. at first, i only want to a mock test with classic sudoku, but i also know many players want to solve variants, so i ask another one to do variants. we want the test in 2 hours because it's better to test players ability in classic and variants, sustained attention in two 2 hours. Deb metioned printing, in my opinion, every player will spend time to print, it's fair. our original intention is everyone will enjoy our puzzles, and harvest by playing our puzzles, i will analysis round 1 after the test end. |
@ 2010-02-28 5:43 PM (#111 - in reply to #100) (#111) Top | |
Country : India | debmohanty posted @ 2010-02-28 5:43 PM anupama_02 - 2010-02-27 11:59 PM i have a doubt lets say i take the mock today with a username.which means i have all the puzzles with me. and what if i login tmmrw with another ID and submit the answers.this way it looks like i have finished all the puzzles when i login the second time These 'Mock Tests' provide opportunities to players to solve Sudokus in a time-constraint-ed environment. This will only help them in 'Actual' competitions. With 'Any Time Mock', players can find ways to cheat the system, but in reality they will be cheating themselves. |
@ 2010-02-28 6:37 PM (#112 - in reply to #10) (#112) Top | |
Posts: 337 Country : Switzerland | Fred76 posted @ 2010-02-28 6:37 PM I think there is a grid without solution .... I do it 3 times and each time, there was a contradiction wich prevented me from continuing the resolution... :( Fred Edited by Fred76 2010-02-28 6:40 PM |
@ 2010-02-28 7:48 PM (#113 - in reply to #112) (#113) Top | |
Country : India | debmohanty posted @ 2010-02-28 7:48 PM Fred, which grid are you referring to? |
@ 2010-02-28 8:24 PM (#114 - in reply to #113) (#114) Top | |
Posts: 12 Country : Czech Republic | mtronic posted @ 2010-02-28 8:24 PM debmohanty - 2010-02-28 7:48 PM Fred, which grid are you referring to? I suppose it is XV. My solution was accepted, but there is one missing V sign between r1c1 and r2c1. |
@ 2010-02-28 8:44 PM (#115 - in reply to #10) (#115) Top | |
Posts: 45 Country : India | adityasaraf007 posted @ 2010-02-28 8:44 PM Average Sudoku Average Sudoku did not have a unique solution: 324 157 698 615 298 734 987 364 125 241 689 573 536 742 981 879 513 246 193 425 867 762 831 459 458 976 312 4 & 8 in Boxes 8 & 9 can be interchanged among themselves. Please correct me if I am wrong. |
@ 2010-02-28 8:53 PM (#117 - in reply to #115) (#117) Top | |
Posts: 337 Country : Switzerland | Fred76 posted @ 2010-02-28 8:53 PM Yes, it was on the XV grid... I had a 3 in r1c1 or r2c1 then 2 could not be in r1c1or r2c1, so I put the 2 r1c3 or r3c3, then I can not finish the grid.... And on average sudoku I thought there were 2 solutions, too... Fred |
@ 2010-02-28 9:02 PM (#118 - in reply to #10) (#118) Top | |
Posts: 9 Country : China | Leaf Card posted @ 2010-02-28 9:02 PM it's my fault lost a "v" in vx sudoku, i'm very sorry to all. the answer of average is 324157698 615298734 987364125 142689573 536742981 879513246 763825419 291436857 458971362 in the rule"The cell which value is the average of two cells aside marked with a line.", so if there's no line, it can't be average of two cells. |
@ 2010-02-28 9:08 PM (#119 - in reply to #115) (#119) Top | |
Posts: 12 Country : Czech Republic | mtronic posted @ 2010-02-28 9:08 PM adityasaraf007 - 2010-02-28 8:44 PM Average Sudoku Average Sudoku did not have a unique solution: 324 157 698 615 298 734 987 364 125 241 689 573 536 742 981 879 513 246 193 425 867 762 831 459 458 976 312 4 & 8 in Boxes 8 & 9 can be interchanged among themselves. Please correct me if I am wrong. On the 7th line ... 2-5-8 would mean, that there is horizontal line over 5. So they can't be this way, only the other position is correct. |
@ 2010-02-28 9:13 PM (#122 - in reply to #10) (#122) Top | |
Posts: 9 Country : China | Leaf Card posted @ 2010-02-28 9:13 PM R7C7 can't be 8 because R7C6 = 5, and R7C5 = 2 |
@ 2010-02-28 9:49 PM (#123 - in reply to #122) (#123) Top | |
Posts: 337 Country : Switzerland | Fred76 posted @ 2010-02-28 9:49 PM Leaf Card - 2010-02-28 9:13 PM R7C7 can't be 8 because R7C6 = 5, and R7C5 = 2 oups you're right :) , I had chance to choose the right solution on this grid :bleh: Fred |
@ 2010-02-28 10:10 PM (#124 - in reply to #10) (#124) Top | |
Posts: 349 Country : India | amitsowani posted @ 2010-02-28 10:10 PM That was one tough set of sudokus !! I liked the fact that the puzzles were all logically solvable (at least the ones that I was able to solve in the given duration) There could have been more time allotted for both rounds. I managed to solve only 3 in the variations round, solving a fourth consecutive just after the time was over. It was a little sad that I wasn't able to try some of the cool sudoku like the Average Sudoku which has a neat set of logic involved. It is very easy to miss an X or a V while making a puzzle like Sudoku XV, however it does distract the solvers and we need to formulate a process to avoid such errors in the mock tests in the future. I will start another thread to discuss some of the possible ideas. |
@ 2010-03-01 7:44 AM (#128 - in reply to #10) (#128) Top | |
Posts: 9 Country : China | Leaf Card posted @ 2010-03-01 7:44 AM maybe because of the missing in vx sudoku, all the reply above are discussing variants, could you give me some reply for classic sudoku. like we metion in IB, all the puzzles are low level technology, 1-6 solvable by singles, 7 solvable by pointing, others need pair triplet and xwing, introduced in many japanese sudoku books. and we alse do some work on guessing part for 7-10. let me show you the analysis by sudoku explainer(a sudoku analysis software) Analyzing Sudoku #1 59 Hidden Single Hardest technique: Hidden Single Difficulty: 1.2 Analyzing Sudoku #2 57 Hidden Single Hardest technique: Hidden Single Difficulty: 1.5 Analyzing Sudoku #3 57 Hidden Single Hardest technique: Hidden Single Difficulty: 1.5 Analyzing Sudoku #4 51 Hidden Single 5 Direct Hidden Pair 1 Naked Single Hardest technique: Naked Single Difficulty: 2.3 Analyzing Sudoku #5 50 Hidden Single 3 Direct Hidden Pair 4 Naked Single Hardest technique: Naked Single Difficulty: 2.3 Analyzing Sudoku #6 50 Hidden Single 1 Direct Pointing 3 Direct Hidden Pair 3 Naked Single Hardest technique: Naked Single Difficulty: 2.3 Analyzing Sudoku #7 48 Hidden Single 1 Direct Pointing 6 Direct Hidden Pair 2 Direct Hidden Triplet 4 Pointing Hardest technique: Pointing Difficulty: 2.6 Analyzing Sudoku #8 51 Hidden Single 4 Direct Hidden Pair 2 Naked Single 4 Pointing 1 Claiming 2 Naked Pair 1 X-Wing Hardest technique: X-Wing Difficulty: 3.2 Analyzing Sudoku #9 53 Hidden Single 2 Direct Hidden Pair 1 Naked Single 1 Direct Hidden Triplet 6 Pointing 1 Claiming 1 Hidden Pair 1 Naked Triplet Hardest technique: Naked Triplet Difficulty: 3.6 Analyzing Sudoku #10 57 Hidden Single 1 Direct Hidden Pair 1 Direct Hidden Triplet 12 Pointing 2 Claiming 9 Naked Pair Hardest technique: Naked Pair Difficulty: 3.0 we know players like to get more score puzzles first, so we put the puzzle seems easier at last with high score. compare with your step and analysis, maybe you will have a new feeling with the ten puzzles, and i wonder someone can tell us your feeling, or you solve time for every puzzle, if all puzzles according with the theme metioned in IB, or something you want to tell us. thank you! :) |
@ 2010-03-01 11:22 AM (#129 - in reply to #119) (#129) Top | |
Posts: 45 Country : India | adityasaraf007 posted @ 2010-03-01 11:22 AM mtronic - 2010-02-28 9:08 PM adityasaraf007 - 2010-02-28 8:44 PM Average Sudoku Average Sudoku did not have a unique solution: 324 157 698 615 298 734 987 364 125 241 689 573 536 742 981 879 513 246 193 425 867 762 831 459 458 976 312 4 & 8 in Boxes 8 & 9 can be interchanged among themselves. Please correct me if I am wrong. On the 7th line ... 2-5-8 would mean, that there is horizontal line over 5. So they can't be this way, only the other position is correct. Thanks for correcting me. I thought that the converse might not be true, so I didn't check for that. |
@ 2010-03-01 12:54 PM (#131 - in reply to #128) (#131) Top | |
Posts: 349 Country : India | amitsowani posted @ 2010-03-01 12:54 PM Thanks for the awesome analysis. Nice way to rate the classics. I think all the techniques that you have used are absolutely acceptable in competitive sudokus. These techniques can be identified by participants without breaking their head too much or being tempted to resort to trial and error. :) |
@ 2010-03-01 2:06 PM (#132 - in reply to #10) (#132) Top | |
Country : India | debmohanty posted @ 2010-03-01 2:06 PM score / Results has been updated to show the split between Round1 and Round2. Couple of observations 1. The average score in Round1 is much higher than average score in Round2. So, probably Round2 should have been longer. 2. Many players didn't attempt Round2. (so, either many players are just interested in Classics OR some players gave up after finding Round1 little tough) Only Zafer completed Round1 with 4 minutes of bonus time. So really a good show from considering many other good players solved only 5-7 in Round1 |
@ 2010-03-01 7:54 PM (#136 - in reply to #132) (#136) Top | |
Posts: 774 Country : India | rakesh_rai posted @ 2010-03-01 7:54 PM As already noted, scores in this mock are very low, implying that the test became tougher than it was perhaps planned by the organisers. We can perhaps infer that two short 50 minute formats can work well in an offline competition, but it is not optimal for online contests. Round 1: Two contestants completed all 10. So timing wise, it was planned ok. If we use the grades from scanraid, we arrive at the following: 1 119 moderate 2 126 moderate 3 101 moderate 4 82 moderate 5 106 moderate 6 84 moderate 7 154 tough 8 306 tough 9 166 tough 10 194 tough I am not sure about the accuracy of this system but this does imply that the 20 pointer was tougher than the 40 and 50 pointers. And the 90 pointer was not tougher than the 70 pointer. In fact, classic 8 was attempted by the least number of contestants (another reason could be that it is difficult to reach to number 8, whether you start from 1 or 10). But overall, the points distibution was good as all "moderate"s had less points than "tough"s. Round II: Consecutive sudoku was nice with logical steps needed to proceed. Thats the only one I can comment on since I got stuck in most others I tried, and solved diagonal the hard way. Here, we probably tried to fit in more sudokus than the alloted time. In 50 minutes, 5 or 6 sudokus (of the level in the mock) would have been perfect. The main regret is that most participants were unable to even try out a majority of sudokus. Another reason for people skipping round 2 could be the rigid "20 minute gap" constraint between the rounds. If the two rounds were independent, we would have seen more scores in round 2. |
@ 2010-03-02 7:53 PM (#137 - in reply to #10) (#137) Top | |
Posts: 148 Country : France | Ours brun posted @ 2010-03-02 7:53 PM I had some informatic problems during round 1 so I could try only the easier puzzles, which were very pleasant to solve. I think 50' was a good timing for this round. Then I tried round 2 but did mistake on mistake and so I decided to stop playing and relax. :bleh: I came back on the puzzles later, and my impression is that puzzles were globally hard, and some really tough. It would have been great to have the round last about one hour and a half. Finally, the 20' break between the two rounds didn't bother me. |
@ 2010-03-03 4:54 AM (#139 - in reply to #136) (#139) Top | |
Posts: 25 Country : United States | cnarrikkattu posted @ 2010-03-03 4:54 AM I would be a bit careful about relying on scanraid ratings for human solving. It doesn't seem to correspond too well with actual testing. For example, see Nick Baxter's remarks about the USSC puzzles here (and from direct experience, the 3rd puzzle of the third round was pretty much the toughest one of the bunch). |
@ 2010-03-03 7:25 PM (#141 - in reply to #136) (#141) Top | |
Posts: 148 Country : France | Ours brun posted @ 2010-03-03 7:25 PM I agree with this, Scanraid's ratings are sometimes far away from what we could expect. Of course every software will sometimes deliver "strange" scores according to us, but Sudoku Explainer is generally considered more reliable. Anyway I didn't try the tough puzzles yet, so I can't tell about my own experience... |