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 Killer Sudoku 16x16 
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Posted on: Fri Sep 25, 2015 2:53 pm




Posts: 65
Joined: Fri May 13, 2011 9:37 am
Post 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!!
Image

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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Posted on: Fri Sep 25, 2015 3:12 pm




Posts: 2192
Joined: Thu May 12, 2011 11:58 pm
Post 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 :)

Image


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Posted on: Sat Sep 26, 2015 11:33 am




Posts: 690
Joined: Fri May 13, 2011 6:51 pm
Post 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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Posted on: Sat Sep 26, 2015 9:28 pm




Posts: 2192
Joined: Thu May 12, 2011 11:58 pm
Post 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 [scared]

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 [smile] )


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Posted on: Sat Sep 26, 2015 11:21 pm




Posts: 65
Joined: Fri May 13, 2011 9:37 am
Post 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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Posted on: Mon Sep 28, 2015 10:51 am




Posts: 2192
Joined: Thu May 12, 2011 11:58 pm
Post 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 [huh]


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