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nicow
Posted on: Fri Sep 25, 2015 2:53 pm
Posts: 84 Joined: Fri May 13, 2011 9:37 am
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Killer Sudoku 16x16
I've worked hard on a larger model to solve killersukdoku's 16 x 16. This one should be 'easy' as it is solvable using easy kinds of logic. So have fun!! Patrick, if you can make a better image, you should. The code for this puzzle is: 16 22,a1a2 25,b1b2 26,c1d1d2 18,e1e2 4,f1f2 24,g1g2 18,h1i1 38,j1k1j2k2 17,l1l2 21,m1m2 14,n1o1p1 33,c2b3c3 13,h2i2 21,n2n3 17,o2p2 15,a3a4 9,d3e3 20,f3f4 12,g3h3 20,i3i4 8,j3k3 16,l3l4 8,m3 19,o3o4 11,p3 11,b4b5 5,c4 14,d4d5 28,e4e5f5 21,g4h4 21,j4k4 12,m4n4 13,p4 17,a5a6 4,c5 11,g5 20,h5i5 20,j5j6 17,k5l5 34,m5l6m6 22,n5n6 9,o5o6 10,p5p6p7 25,b6b7 16,c6c7 18,d6e6 19,f6f7 1,g6 19,h6h7 19,i6i7 5,k6 3,a7 8,d7 17,e7e8 2,g7 16,j7 16,k7k8 12,l7 28,m7m8 5,n7 19,o7o8 22,a8b8a9 27,c8d8 19,f8g8 33,h8i8h9i9 11,j8 7,l8 4,n8 28,p8o9p9 7,b9b10 15,c9 14,d9d10 9,e9 23,f9f10 13,g9 13,j9k9 11,l9l10 12,m9n9 20,a10a11a12 13,c10 11,e10 12,g10 4,h10h11 10,i10i11 5,j10 17,k10k11 6,m10 28,n10n11 18,o10o11 14,p10 8,b11b12 17,c11c12 42,d11e11d12 5,f11 12,g11g12 12,j11 26,l11m11 15,p11p12 8,e12f12 31,h12i12 13,j12 26,k12l12l13 4,m12m13 1,n12 23,o12o13 5,a13 26,b13b14 6,c13d13 16,e13e14 20,f13g13 17,h13h14 26,i13j13 20,k13k14 16,n13 18,p13p14 13,a14 15,c14c15 7,d14 8,f14g14 15,i14j14 14,l14m14 27,n14o14n15 17,a15b15 17,d15d16 16,e15e16 40,f15g15f16g16 18,h15i15 17,j15j16 3,k15k16 21,l15l16 18,m15m16n16 25,o15o16 12,p15p16 30,a16b16c16 18,h16i16
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pnm
Posted on: Fri Sep 25, 2015 3:12 pm
Posts: 3305 Joined: Thu May 12, 2011 11:58 pm
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Re: Killersudoku 16 x 16
A better rendering should be possible, it will require some updates to the code though (because at the moment it can only handle 9x9 Killer Sudoku's) Edit: I was able to produce something quickly by treating it as a 16x16 "no-op", and editing in the grey squares :)
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clm
Posted on: Sat Sep 26, 2015 11:33 am
Posts: 857 Joined: Fri May 13, 2011 6:51 pm
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Re: Killersudoku 16 x 16
pnm wrote: A better rendering should be possible, it will require some updates to the code though (because at the moment it can only handle 9x9 Killer Sudoku's)
Edit: I was able to produce something quickly by treating it as a 16x16 "no-op", and editing in the grey squares :)
... Here you have an idea for your next book, you may include a couple of these. Of course they can be made much more difficult by using larger cages.
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pnm
Posted on: Sat Sep 26, 2015 9:28 pm
Posts: 3305 Joined: Thu May 12, 2011 11:58 pm
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Re: Killersudoku 16 x 16
clm wrote: Here you have an idea for your next book, you may include a couple of these. Of course they can be made much more difficult by using larger cages. Yes. First step was to update my Killer Sudoku solver such that it can handle 16x16 puzzles A bit of a headache, but I think I got it to work. It rated nicow's puzzle as (very) easy (and solved it in a time well below 1 millisecond )
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nicow
Posted on: Sat Sep 26, 2015 11:21 pm
Posts: 84 Joined: Fri May 13, 2011 9:37 am
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Re: Killersudoku 16 x 16
Ha ha, yes the first time has to be a feel-good event, so I chose for a very ease one.
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pnm
Posted on: Mon Sep 28, 2015 10:51 am
Posts: 3305 Joined: Thu May 12, 2011 11:58 pm
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Re: Killersudoku 16 x 16
nicow wrote: I've worked hard on a larger model to solve killersukdoku's 16 x 16. It is quite a bit harder to create 16x16 Killer Sudoku's ... For creating the number grid, for example, the straight-forward method I was using for a 9x9 (basically trial and error) isn't practical anymore. It also looks like the approach of creating a puzzle with a certain cage distribution, then solving it to see if it has one solution (and how much effort that takes) doesn't work anymore: so far I always end up with either "fill it in" puzzles that are too easy, or ones that take too long to solve
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