Tarek's Bank Holiday 1108 Sumo Special

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Tarek's Bank Holiday 1108 Sumo Special

Postby tarek » Sun Jul 10, 2011 5:38 pm

I had this puzzle for some time now. It is a variant of Sumo (Gattai-13).
Grids 1, 3, 11 & 13 are Sudoku-X
Grids 2, 6, 8 & 12 are Windoku
Grids 4, 5, 9 & 10 are Asterisk Sudoku
Grid 7 is a Clover-X (Asterisk Windoku X)
It shouldn't need more than doubles to solve.
I will be posting the solution on Aug 29th 2011 (bank holiday in England)

Image

Code: Select all
.8.....9.4.5.3...6.1..6...4....2..3..549.......................5..2......21......
.........1.2...3.6.6.....7...81.92..3.......5..7...9.............................
.5.....1.7...9.5.41...5..6..7..3.........945........................8..9......62.
.............17......29......58..1...94..1....6..7.......4.......................
............98........15.....5..14.....3..87.....4..1......4.....................
.5..6......6.......7.4.9......9.................8......4.3.5.....2.......3..4....
....3...............................2.......9...............................5....
....6..3.......4.....9.3.6......8.................7......3.6.1.......2......5..4.
.....................9......5..6.....68..2.....35..6.....29........35............
.......................2.......2..4....6..25...9..41......51......23.............
.86......5..8........................591.........2..1..9..5...37.5.9...1.4.....9.
.............................2...3..4.......6..75.31...6.....8.1.4...9.7.........
......12......3..5.......................571..5..7....4...1..7.1...3.6.8.6.....9.


for an A3 downloadable PDF, check the identical post on the SudokuSolver forum here:
http://www.rcbroughton.co.uk/sudoku/forum/viewtopic.php?f=4&t=904

Enjoy,

Tarek
Last edited by tarek on Thu Dec 19, 2019 5:26 pm, edited 1 time in total.
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Tarek's Bank Holiday 1108 Sumo Special Solution

Postby tarek » Mon Aug 29, 2011 11:46 pm

Solution

Image

Line format: Show
Code: Select all
286547193495132876713869254879625431654913728132478965348796512567281349921354687
834726591172985346965341872548139267329674185617258934793412658286597413451863729
958746312736192584142853967875634291613279458429581736291465873567328149384917625
512684793349517286687293451235846179794321568861975342973462815428159637156738924
658473291413982567729615384985761423142359876367248915276834159594127638831596742
254168973916573428378429156423917865187654239695832741741385692562791384839246517
815439276637821594924576831591682743278314659346795182183247965759163428462958317
159462837638715429742983165261538974873149652594627381427396518315874296986251743
692457183384621759517983462951768324468312597273549618735296841149835276826174935
965183427428967315317542986186325749743619258259874163632751894594238671871496532
986412735527863149431579826318647952259138674674925318892751463765394281143286597
841759632276831594935462871512976348493218756687543129369127485124385967758694213
894657123671293845532841967917428536248365719356179284485916372129734658763582491


[Edit: updated broken image link]
Last edited by tarek on Sat Jun 20, 2020 4:51 pm, edited 1 time in total.
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Re: Tarek's Bank Holiday 1108 Sumo Special

Postby enxio27 » Sat Jul 28, 2012 3:04 am

tarek, I hope you're still around. I'm giving this one another go.

I also gave it to a lady I met at the dentist's office the other day, and gave her a link to Richard's forum. She was very excited to see this puzzle, and said that she would be sharing it with her son as well. I warned her that pencil marks would be required, and she's familiar with those.
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Re: Tarek's Bank Holiday 1108 Sumo Special

Postby enxio27 » Sat Jun 20, 2020 2:18 pm

One of these days I'm going to actually manage to finish this puzzle. I've messed it up several times now, but I haven't given up!
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Re: Tarek's Bank Holiday 1108 Sumo Special

Postby tarek » Sat Jun 20, 2020 4:47 pm

enxio27 wrote:One of these days I'm going to actually manage to finish this puzzle. I've messed it up several times now, but I haven't given up!


:D to celebrate finishing it - when you do - I'll post a new one! (August when we have a bank holiday here in UK sounds to me like a good target ;) )

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Re: Tarek's Bank Holiday 1108 Sumo Special

Postby enxio27 » Sat Jun 20, 2020 6:53 pm

tarek wrote: :D to celebrate finishing it - when you do - I'll post a new one! (August when we have a bank holiday here in UK sounds to me like a good target ;) )

I will give it a shot! That puzzle has actually been sitting on my nightstand for a long time, waiting for me to get back to it. We are getting ready to move house again, but I'm trying to make a point of spending more time on sudoku lately. I may have to print a fresh copy and start over again, though.
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Re: Tarek's Bank Holiday 1108 Sumo Special

Postby creint » Sun Jun 21, 2020 7:19 am

It shouldn't need more than doubles to solve.

It needs more when you don't use the hidden windoku constraints.
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Re: Tarek's Bank Holiday 1108 Sumo Special

Postby tarek » Sun Jun 21, 2020 10:25 am

I agree that the difficulty level of this puzzle is higher than the complexity of just managing all the constraints. when you are using locked candidates, doubles and triples then this would go into difficult territory with that in mind …

If there is a next time … It will definitely be easier!!!

I thought I posted a walkthrough for this puzzle specifically but it seems that I didn't … I will post one at some stage

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Re: Tarek's Bank Holiday 1108 Sumo Special

Postby enxio27 » Sun Jun 21, 2020 3:24 pm

tarek wrote:I agree that the difficulty level of this puzzle is higher than the complexity of just managing all the constraints. when you are using locked candidates, doubles and triples then this would go into difficult territory with that in mind …

If there is a next time … It will definitely be easier!!!

I thought I posted a walkthrough for this puzzle specifically but it seems that I didn't … I will post one at some stage

Looking at my notes for this puzzle, apparently each time I've tried it, I made a mistake at some point (probably missing an elimination somewhere, or making an incorrect one). The last time, it was in grid 7.

I may have to double-check all of my pencil-marks, as well. Puzzles like this that are a combination of variants are a bit more challenging in that regard. However, if I read correctly, it appears that the latest version of Richard Broughton's SudokuSolver may be able to handle puzzles like this now. I'll have to play with that some more. That would certainly simplify and possibly eliminate the pencil-mark issue.
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solution path to critical point

Postby tarek » Sun Jun 21, 2020 8:04 pm

In here I present my solver's solution path (including an unfruitful x-wing) to the point where using the generalized form of locked candidates is needed. Some would use this technique regularly in variants & in Sukaku Explainer it replaces the pointing & claiming in Sudoku Variants with a rating of 2.9 and would be exhausted prior to using subsets.

Traditional solution path to critical point: Show
Code: Select all
.8.....9.4.5.3...6.1..6...4....2..3..549.......................5..2......21......
.........1.2...3.6.6.....7...81.92..3.......5..7...9.............................
.5.....1.7...9.5.41...5..6..7..3.........945........................8..9......62.
.............17......29......58..1...94..1....6..7.......4.......................
............98........15.....5..14.....3..87.....4..1......4.....................
.5..6......6.......7.4.9......9.................8......4.3.5.....2.......3..4....
....3...............................2.......9...............................5....
....6..3.......4.....9.3.6......8.................7......3.6.1.......2......5..4.
.....................9......5..6.....68..2.....35..6.....29........35............
.......................2.......2..4....6..25...9..41......51......23.............
.86......5..8........................591.........2..1..9..5...37.5.9...1.4.....9.
.............................2...3..4.......6..75.31...6.....8.1.4...9.7.........
......12......3..5.......................571..5..7....4...1..7.1...3.6.8.6.....9.

6 in g2r4c8 is a hidden single in more than one sector
[g2r5c78][g2r6789c8]<>6
3 in g8r6c7 is a hidden single in more than one sector
[g8r456c9][g8r6c15]<>3
4 in g8r8c6 is a hidden single in more than one sector
[g8r78c5][g8r8c134]<>4
1 in g12r7c4 is a hidden single in more than one sector
[g12r123459c4][g12r9c56]<>1
7 in g12r7c6 is a hidden single in more than one sector
[g12r123459c6][g12r9c45]<>7
1 in g13r9c9 is a hidden single in more than one sector
[g10r8c8][g10r9c9][g13r4c4][g13r6c6]<>1
4 in g6r1c3 is a hidden single for g6r1
[g6r2c1][g6r5c3]<>4
4 in g8r1c4 is a hidden single for g8r1
[g8r3c5][g8r456c4][g8r5c23]<>4
5 in g10r3c4 is a hidden single for g10r3
[g10r12c46][g10r46c4]<>5
5 in g10r4c6 is a hidden single in more than one sector
[g10r4c123]<>5
3 in g5r7c5 is a hidden single for g5r7
[g5r189c5][g5r89c6]<>3
6 in g4r9c3 is a hidden single for g4c3
[g4r9c1456789][g6r4c19][g6r678c9]<>6
5 in g6r2c4 is a hidden single for g6c4
[g4r8c12][g6r23c5][g6r4c3]<>5
5 in g6r6c3 is a hidden single in more than one sector
[g6r456c1][g6r6c59]<>5
4 in g10r1c7 is a hidden single for g10c7
[g7r7c789][g8r456c1][g8r6c59][g8r7c3][g10r1c45]<>4
5 in g11r4c8 is a hidden single for g11c8
[g11r4c4679][g11r6c79]<>5
4 in g4r3c7 is a hidden single for g4a
[g1r9c78][g2r1c159][g2r34678c1][g2r59c5][g2r78c23][g2r9c2346789][g4r689c7][g4r3c6]<>4
3 in g5r3c7 is a hidden single for g5a
[g2r9c8][g3r1c19][g3r2c8][g3r3c7][g3r5678c1][g3r78c23][g3r9c23469][g5r68c7]<>3
2 in g10r7c3 is a hidden single for g10a
[g7r78c9][g10r7c12][g10r9c123][g12r1c456][g12r59c5][g12r679c9][g12r9c1]<>2
4 in g5r5c2 is a hidden single for g5a
[g2r78c8][g5r89c2][g5r5c13]<>4
9 in g9r5c8 is a hidden single for g9a
[g7r78c2][g9r4689c8][g9r4c79][g9r5c179][g9r6c9]<>9
5 in g2r4c1 is a Naked single
[g2r234c5][g2r3678c1][g2r46c2]<>5
4 in g2r4c2 is a Naked single
[g2r1256c2][g2r23c4][g2r35c3][g2r4c59]<>4
4 in g2r1c3 is a hidden single in more than one sector
[g2r1c4678][g2r5c4]<>4
8 in g3r2c8 is a Naked single
[g3r13c79][g3r2c234][g3r467c8][g3r5c5][g3r6c4][g3r7c3]<>8
9 in g3r4c8 is a Naked single
[g3r4c137][g3r6c78]<>9
9 is a locked candidate in the intersection of g6b1/g6c1
[g6r56789c1]<>9
9 in g6r9c3 is a hidden single for g6r9
[g6r5c23][g6r7c3][g6r8c2]<>9
9 in g6r6c2 is a hidden single in more than one sector
[g6r6c789]<>9
1 is a locked candidate in the intersection of g4b1/g4r1
[g2r7c23]<>1
1 in g2r6c2 is a hidden single for g2w3
[g2r5c23][g2r6c89][g2r9c2]<>1
1 in g2r9c3 is a hidden single in more than one sector
[g2r9c56][g4r789c9]<>1
5 is a locked candidate in the intersection of g4b7/g4r9
[g4r9c456789]<>5
6 is a locked candidate in the intersection of g5b9/g5r8
[g5r8c123456]<>6
1 is a locked candidate in the intersection of g7b1/g7c2
[g7r456789c2]<>1
4 is a locked candidate in the intersection of g7r1/g7b2
[g7r23c456]<>4
1 is a locked candidate in the intersection of g9b7/g9c1
[g6r789c7][g9r456c1]<>1
4 is a locked candidate in the intersection of g9b1/g9r2
[g7r8c123][g9r2c456]<>4
8 is a locked candidate in the intersection of g9b7/g9r9
[g9r9c456789]<>8
3 is a locked candidate in the intersection of g12r5/g12w5
[g9r7c89][g12r19c4][g12r9c23]<>3
3 is a locked candidate in the intersection of g12b1/g12r3
[g10r9c3][g12r3c45]<>3
3 in g10r7c2 is a hidden single in more than one sector
[g7r789c8][g10r7c89][g10r46c2][g12r1c5][g12r9c8]<>3
3 in g13r1c9 is a hidden single for g13r1
[g13r3c789][g13r4567c9][g13r6c4][g13r7c3][g13r9c1]<>3
7 in g13r3c9 is a hidden single in more than one sector
[g10r9c789][g13r3c46]<>7
2 in g13r7c9 is a Naked single
[g13r456c9][g13r7c23467][g13r9c7]<>2
9 is a locked candidate in the intersection of g12r1/g12b2
[g12r23c456]<>9
4 is a locked candidate in the intersection of g1r9/g1b8
[g1r7c456][g1r8c56]<>4
4 is a locked candidate in the intersection of g4b2/g4r1
[g1r7c78]<>4
4 in g1r7c2 is a hidden single for g1r7
[g1r8c2]<>4
4 is a locked candidate in the intersection of g1d//g1b5
[g1r4c4][g1r6c56]<>4
4 in g1r8c8 is a hidden single for g1d\
[g1r6c8][g1r8c7][g4r8c2]<>4
4 in g4r8c1 is a hidden single in more than one sector
[g4r8c89][g6r4c678][g6r568c7]<>4
2 is a locked candidate in the intersection of g2c1/g2w8
[g2r678c5][g2r78c9]<>2
5 is a locked candidate in the intersection of g5c8/g5b9
[g5r789c9][g5r89c7]<>5
6 is a locked candidate in the intersection of g5b1/g5c1
[g5r45679c1]<>6
8 is a locked candidate in the intersection of g6b7/g6c1
[g6r12345c1]<>8
2 is a locked candidate in the intersection of g7b9/g7w4
[g7r6c678][g7r78c6]<>2
3 is a locked candidate in the intersection of g9b1/g9r2
[g7r8c123][g9r2c46]<>3
1 is a locked candidate in the intersection of g5a/g5r7
[g5r7c1249]<>1
9 is a locked candidate in the intersection of g8c6/g8w6
[g8r159c7][g8r5c8]<>9
4 is a locked candidate in the intersection of g9b9/g9c8
[g7r79c2][g9r46c8]<>4
4 is a locked candidate in the intersection of g13c9/g13b6
[g13r46c78]<>4
7 is a locked candidate in the intersection of g13d\/g13b1
[g10r7c89][g10r8c79]<>7
7 is a locked candidate in the intersection of g13d//g13b7
[g13r89c3]<>7
7 in g13r4c3 is a hidden single for g13c3
[g13r4c12]<>7
1 is a locked candidate in the intersection of g1b9/g1r7
[g1r7c456]<>1
2 is a locked candidate in the intersection of g1d//g1b3
[g1r12c7][g1r3c8]<>2
6 is a locked candidate in the intersection of g1b9/g1c7
[g1r456c7]<>6
9 is a locked candidate in the intersection of g1b2/g1c6
[g1r789c6]<>9
1 is a locked candidate in the intersection of g2w9/g2r1
[g2r1c678]<>1
3 is a locked candidate in the intersection of g2w6/g2c6
[g2r678c6]<>3
5 is a locked candidate in the intersection of g2b9/g2w4
[g2r678c6]<>5
6 is a locked candidate in the intersection of g2w9/g2c5
[g2r678c5]<>6
9 is a locked candidate in the intersection of g2r5/g2w5
[g2r1c24][g2r9c4]<>9
1 is a locked candidate in the intersection of g3b7/g3c3
[g3r456c3]<>1
3 is a locked candidate in the intersection of g5b9/g5r8
[g5r8c123]<>3
7 is a locked candidate in the intersection of g5b3/g5c9
[g5r789c9]<>7
7 is a locked candidate in the intersection of g8b1/g8w7
[g8r23c59][g8r4c19]<>7
7 in g8r2c4 is a hidden single for g8b2
[g5r8c7][g8r2c8][g8r4c23][g8r89c4]<>7
7 in g5r9c7 is a hidden single in more than one sector
[g5r9c123456][g8r3c7][g8r589c1]<>7
7 is a locked candidate in the intersection of g8b4/g8r5
[g8r5c789]<>7
7 in g8r4c8 is a hidden single for g8c8
[g8r4c7]<>7
2 is a locked candidate in the intersection of g8w2/g8r2
[g5r8c789][g8r2c59]<>2
3 is a locked candidate in the intersection of g6w8/g6r6
[g6r6c678]<>3
6 is a locked candidate in the intersection of g6w3/g6r8
[g6r8c167]<>6
6 is a locked candidate in the intersection of g6b9/g6c7
[g6r456c7]<>6
8 is a locked candidate in the intersection of g6w5/g6r5
[g6r5c789]<>8
3 is a locked candidate in the intersection of g7b3/g7r3
[g4r9c789]<>3
3 is a locked candidate in the intersection of g4b9/g4r8
[g4r8c23456]<>3
4 is a locked candidate in the intersection of g7b1/g7w1
[g7r4c234]<>4
2 is a locked candidate in the intersection of g8b7/g8w3
[g8r6c234]<>2
5 is a locked candidate in the intersection of g8b1/g8c2
[g8r456c2]<>5
6 is a locked candidate in the intersection of g9b9/g9c9
[g7r789c3]<>6
6 is a locked candidate in the intersection of g7b7/g7c2
[g4r78c8][g7r456c2]<>6
6 is a locked candidate in the intersection of g4c8/g4b6
[g4r45c9][g4r5c7]<>6
5 is a locked candidate in the intersection of g10b9/g10r9
[g10r9c123]<>5
9 is a locked candidate in the intersection of g10b7/g10c2
[g7r789c8]<>9
9 is a locked candidate in the intersection of g7b9/g7c7
[g5r789c1]<>9
9 is a locked candidate in the intersection of g5b7/g5c2
[g2r9c8][g5r46c2]<>9
9 in g2r1c8 is a hidden single in more than one sector
[g2r1c159][g2r3c9]<>9
2 is a locked candidate in the intersection of g2b3/g2c9
[g2r9c9]<>2
9 in g2r9c9 is a Naked single
[g2r7c9][g2r9c5][g3r9c23][g5r7c7][g5r5c35][g5r6c3][g5r8c5]<>9
9 in g3r9c4 is a hidden single for g3r9
[g3r7c4]<>9
2 is a locked candidate in the intersection of g5b1/g5c2
[g5r46789c2]<>2
1 is a locked candidate in the intersection of g11d\/g11b1
[g11r2c3][g11r3c12]<>1
2 is a locked candidate in the intersection of g12w3/g12r8
[g12r8c568]<>2
2 is a locked candidate in the intersection of g13b1/g13r3
[g13r3c456]<>2
9 is a locked candidate in the intersection of g1d//g1b7
[g1r7c1][g1r8c3]<>9
9 is a locked candidate in the intersection of g3d\/g3b1
[g3r1c3][g3r3c2]<>9
2 is a locked candidate in the intersection of g4b1/g4r1
[g2r7c12]<>2
2 is a locked candidate in the intersection of g2b7/g2r8
[g2r8c468]<>2
1 is a locked candidate in the intersection of g5b3/g5c9
[g5r89c9]<>1
1 is a locked candidate in the intersection of g8w1/g8r4
[g8r4c1579]<>1
4 is a locked candidate in the intersection of g5b9/g5r9
[g5r9c13]<>4
5 is a locked candidate in the intersection of g6w7/g6r4
[g6r4c78]<>5
8 is a locked candidate in the intersection of g6b6/g6r4
[g6r4c23]<>8
9 is a locked candidate in the intersection of g6w4/g6b9
[g6r78c9]<>9
1 is a locked candidate in the intersection of g8b1/g8c1
[g8r56c1]<>1
3 is a locked candidate in the intersection of g8w7/g8r4
[g8r4c23]<>3
4 is a locked candidate in the intersection of g8w7/g8r4
[g8r4c23]<>4
7 is a locked candidate in the intersection of g8w9/g8c9
[g8r78c9]<>7
7 is a locked candidate in the intersection of g8b9/g8r9
[g8r9c23]<>7
8 is a locked candidate in the intersection of g8b2/g8c5
[g8r78c5]<>8
8 is a locked candidate in the intersection of g8w1/g8b1
[g5r7c89]<>8
8 is a locked candidate in the intersection of g8r1/g8b3
[g8r23c9]<>8
3 is a locked candidate in the intersection of g9b9/g9r9
[g9r9c12]<>3
3 is a locked candidate in the intersection of g11b3/g11r1
[g11r1c1456]<>3
6 is a locked candidate in the intersection of g9b1/g9c1
[g9r89c1]<>6
6 is a locked candidate in the intersection of g11b3/g11c9
[g11r4569c9]<>6
2 is a locked candidate in the intersection of g10b3/g10r1
[g7r7c78]<>2
2 is a locked candidate in the intersection of g7b9/g7r8
[g7r8c2345]<>2
2 in g9r2c5 is a hidden single for g9r2
[g6r9c9][g9r13c5]<>2
8 is a locked candidate in the intersection of g9a/g9c7
[g7r78c1][g9r48c7]<>8
2 is a locked candidate in the intersection of g12w2/g12c6
[g12r59c6]<>2
2 is a locked candidate in the intersection of g12c6/g12b2
[g12r23c5]<>2
5 is a locked candidate in the intersection of g12b3/g12r2
[g12r2c56]<>5
9 is a locked candidate in the intersection of g12b3/g12c8
[g12r45c8]<>9
3 is a locked candidate in the intersection of g13b9/g13c7
[g13r46c7]<>3
4 is a locked candidate in the intersection of g13b1/g13c3
[g13r56c3]<>4
5 is a locked candidate in the intersection of g13b1/g13r3
[g13r3c45]<>5
5 is a locked candidate in the intersection of g13d//g13b7
[g13r89c3]<>5
6 is a locked candidate in the intersection of g13b3/g13c8
[g13r46c8]<>6
9 is a locked candidate in the intersection of g13b3/g13c7
[g13r46c7]<>9
3 is a locked candidate in the intersection of g2w1/g2r3
[g2r3c5]<>3
7 is a locked candidate in the intersection of g2w1/g2r2
[g2r2c5]<>7
5 is a locked candidate in the intersection of g5a/g5c5
[g5r9c5]<>5
2 is a locked candidate in the intersection of g6w1/g6c2
[g6r5c2]<>2
2 is a locked candidate in the intersection of g8b7/g8r7
[g8r7c5]<>2
5 is a locked candidate in the intersection of g8b2/g8c6
[g8r5c6]<>5
2 is a locked candidate in the intersection of g9b9/g9c7
[g9r4c7]<>2
2 is a locked candidate in the intersection of g12b1/g12c1
[g12r7c1]<>2
6 is a locked candidate in the intersection of g12w4/g12r8
[g12r8c5]<>6
9 is a locked candidate in the intersection of g12w6/g12c6
[g12r4c6]<>9
17 is a hidden pair in g4c4
[g4r8c4]<>5<>6<>9 [g4r9c4]<>3<>9
9 in g4r6c4 is a hidden single for g4c4
[g4r46c6][g4r6c789]<>9
25 is a hidden pair in g10r6
[g10r6c1]<>3<>6<>7<>8 [g10r6c2]<>6<>7<>8
6 is a locked candidate in the intersection of g10b4/g10r4
[g10r4c79]<>6
78 is a hidden pair in g8r1
[g8r1c7]<>1<>5 [g8r1c9]<>1<>2<>9
9 is a locked candidate in the intersection of g8r1/g8w5
[g8r59c23]<>9
9 is a locked candidate in the intersection of g8b3/g8r2
[g5r8c7]<>9
9 is a locked candidate in the intersection of g5b9/g5r7
[g5r7c2]<>9
9 is a locked candidate in the intersection of g7c8/g7w2
[g7r234c6]<>9
34 is a hidden pair in g8c5
[g8r4c5]<>2<>9 [g8r5c5]<>1<>2<>9
9 is a locked candidate in the intersection of g8c5/g8w8
[g8r6c19][g8r78c9][g8r8c1]<>9
24 is a hidden pair in g12w4
[g12r7c7]<>5
5 is a locked candidate in the intersection of g12w4/g12r8
[g12r8c5]<>5
589 is a naked triple in g8b9
[g8r8c9]<>5<>8 [g8r9c7]<>8 [g8r9c9]<>8<>9
9 is a locked candidate in the intersection of g8b9/g8w4
[g8r6c8]<>9
1 forms a unfinned 2-fish in g13c2c6/g13r3r4
[g13r3c4]<>1
235 is a hidden triple in g10r9
[g10r9c7]<>6<>8<>9 [g10r9c8]<>1<>8<>9 [g10r9c9]<>4<>6<>8<>9
1 in g10r8c9 is a hidden single in more than one sector
[g8r89c3][g10r8c23][g13r2c4][g13r6c3]<>1
4 in g10r7c9 is a hidden single in more than one sector
[g10r7c14][g13r1c456]<>4
1 in g13r3c6 is a hidden single in more than one sector
[g13r4c6]<>1
1 in g13r4c2 is a hidden single in more than one sector
4 in g13r5c2 is a hidden single in more than one sector
[g13r5c459]<>4
1 in g13r6c4 is a hidden single in more than one sector
1 is a locked candidate in the intersection of g12b3/g12r3
[g9r9c89][g12r3c56]<>1
1 is a locked candidate in the intersection of g8b7/g8c2
[g8r456c2]<>1
4 is a locked candidate in the intersection of g10b8/g10r9
[g10r9c123]<>4
4 is a locked candidate in the intersection of g12b3/g12r2
[g9r8c8][g12r2c456]<>4
6 is a locked candidate in the intersection of g13b1/g13c1
[g13r456c1]<>6
6 is a locked candidate in the intersection of g10b9/g10c7
[g8r8c1]<>6


At this point I'll focus on grid 3 (the top right grid):
Here you have 3 possible elimination steps using the generalized form of locked candidates:

5 is locked in r9: r6c6<>5
Image

9 is locked in r3: r7c3<>9
Image

9 is locked in the Anti-Diagonal r3c3<>9
Image

One of the last 2 is enough to advance this grid and the rest of the puzzle back in the traditional way

[EDIT: Polished the partial solution path]
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Re: Tarek's Bank Holiday 1108 Sumo Special

Postby 1to9only » Sun Jun 28, 2020 11:48 am

I have added a sumo.class to my SukakuExplainerAddons.zip to solve/rate this puzzle, see here.
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Re: Tarek's Bank Holiday 1108 Sumo Special

Postby tarek » Mon Jun 29, 2020 6:27 am

1to9only wrote:I have added a sumo.class to my SukakuExplainerAddons.zip to solve/rate this puzzle, see here.


That's great. I tested it on this puzzle and it works

tarek
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