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-- Sudoku
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| Originally posted by JBDreamerie i used to be really bad at these, but really loved them. did one a day. now, i can complete a gentle in 5 minutes and an evil/most difficult in 45 minutes to an hour. and about them dying out in popularity, i'm not sure, i think it's more appealing to mathematically minded people...just like crosswords are for word people...and those haven't died out |
here's my strategy (if you don't want these hints, don't read it!!!):
first, print it out, and write on it.
second, with the row/column/box that has the most numbers in it, go through each of the ones that don't have numbers, and find the only possibilities in those. write them down.
third, repeat step 2.
at this point, there should be a fair amount that are filled out (because you were able to eliminate all but one in a box). on gentle level you most likely have 75% of it done. on evil, maybe 20%.
every box should be filled with a filled number, or a possibility of numbers.
now comes the key part. you have to know three basic tricks:
if in any row/column/9-box, the following happens:
1) in one box you have (1 2), in another box (1 2) and in another box (1 2 3); that third box HAS to be 3. or you can say, if any two boxes have two number possibilities (and ONLY two!), then you can eliminate those numbers from the rest of the boxes in the respective row/column/9-box
2) in one box you have (1 2), in another box (1 3) and in another box (1 2 3); those numbers cannot appear in ANY other box in that respective row/column/9-box
3) if you did the listing correctly, if one number appears in only one box of a row/column/9-box, that box has to contain that number.
and basically you just do it over and over and over again. you start developing an eye for it, and can start listing number possibilities really quickly. you start seeing patterns of possibilities and can start to eliminate numbers from other boxes.
for every 9-box, you have three rows, and three columns to check, so don't be discouraged if you go through it once and can't get it. if you are able to eliminate something from a 9-box, that probably will help you in another box. and so on.
also, if you notice, the square is always symmetric downwards (fold the entire square in half) and then horizontally (fold the remaining. i don't know how to explain it...it's like symmetric diagonally, and then mirrored. they're not the same numbers, but they should help you decide which row/column/9-box to start with first.
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| Originally posted by igottaknow I thought 'Sudoku' was Japanese for suicide?  |
can someone do this puzzle for me
xxx x8x x27
xxx xx3 x8x
x87 xxx 3x6
x5x xx6 xx1
1x6 xxx 8x3
2xx 1xx x5x
5x2 xxx 79x
x1x 5xx xxx
84x x7x xxx
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| Originally posted by Sunsnail can someone do this puzzle for me xxx x8x x27 xxx xx3 x8x x87 xxx 3x6 x5x xx6 xx1 1x6 xxx 8x3 2xx 1xx x5x 5x2 xxx 79x x1x 5xx xxx 84x x7x xxx |
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| Originally posted by JBDreamerie give me some time, i'll post it as soon as i figure it out |
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| Originally posted by Sunsnail can someone do this puzzle for me [code] xxx x8x x27 xxx xx3 x8x x87 xxx 3x6 x5x xx6 xx1 1x6 xxx 8x3 2xx 1xx x5x 5x2 xxx 79x x1x 5xx xxx 84x x7x xxx |
that cant be right
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| Originally posted by Sunsnail that cant be right |
I stopped playing Sudoku after I was finishing all the highest difficulty puzzles in 7-9 minutes.
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| Originally posted by Floorfiller what's wrong with it? |
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| Originally posted by Sunsnail you copied the puzzle wrong =\ |
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| Originally posted by Temperate yeah, sudoku is not a logic puzzle, nice try, though. |
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