The New Sudoku Players' Forum

by **Hajime** » Thu May 17, 2018 9:22 am

A question mark made up from 9 partly overlapping (not box-wise) Sudoku's.
Overlapping areas are clueless.
A 10th clueless Sudoku is colored light yellow and the orange dot is the center box.

The first one is easy to solve: only box/row/column eliminations and hidden/naked singles needed.

Picture:

Hidden Text: Show

Also in code (from head to tail)

Hidden Text: Show

The second one is more difficult (moderate). Techniques to be used are:
- box --> row/column elimination and vv
- naked/hidden pairs/triplets/...

Picture:

Hidden Text: Show

In code:

Hidden Text: Show

I presume most solvers have trouble with the irregular overlapping

.

by **enxio27** » Thu May 17, 2018 1:39 pm

Interesting concept! Just an FYI: The light yellow clueless boxes are extremely difficult to see. The bright yellow background makes it even more difficult.

by **creint** » Thu May 17, 2018 8:05 pm

Solved with solver each within 5 seconds.
It solves from head to tail too.
Second one only needs pointing/boxline reducion, no need for pairs/triples.

by **Hajime** » Mon May 21, 2018 9:35 pm

Are these kind of puzzels appreciated? Or only solved by automated solvers

by **enxio27** » Tue May 22, 2018 1:41 pm

Hajime wrote:Are these kind of puzzels appreciated? Or only solved by automated solvers

I don't know how many others here like gattai and puzzles with extra constraints, but I appreciate them! It just takes me a while to solve them, although I've been making a point of finding more bits of sudoku time throughout my day. Don't let creint bother you. I think he just likes to show off. :roll:

I have been hoping for an updated gattai maker for quite a while now. JSudoku is no longer being maintained, and doesn't include the newer gattai shapes. The ones who used to make and post gattai (Ruud, Boerge, et al) have left the sudoku forums for other activities. I'm thrilled that you and 1to9only have been posting new puzzles recently, and I'm working my way through them as fast as I can.

by **1to9only** » Sat Jun 30, 2018 7:46 am

A while back, I created a few of these irregular q's, some are below. The rectangular shaped overlaps cause problems when creating these, the (%) success rate probably in the low single digit!!

Question [EASY - singles only]

Code: Select all: .........9...3..8.6.......2.....3....26.1.........45.1..7........1...32.......... .........5............2.4...1....8...76....3....26...9...83...4..45.............. .....2.......7....63.............3.......8............7..9............1.....6.7.. 2...............5.....4..9.....1..........7........3.......15.......6.......25... .....3.9....9..1....26........7...3.........4..83..............53................ ..................1....749......5..6.....2.........9........3.8.......6.......... 495.............5.........4.....43...3..9............1...........9....2.....4.... 5..............7..4...........2.83..2.....5.....1.......4...8......79............ .........1.5.276........9...1...5.3......8....3.4.2.9.5...6...1.2.....4.7.43.....

Question [HARD - singles, locked candidates, pairs, triples, quads]

Code: Select all: .........2.36..8.....9.8.45..7......1....2....98.3...6.3.....7.9.5.......7....... ..6.......5.3......7.....2.................67....1...51.......8..7............... ..8.3.5.......7...............7.9.........3.......58..8............7............. .69.51.2.....2..8......9.1.....8.6.....6............................2.......9.... .....29.....5.......1....7..................6........1....5...................... ................5.3....6.1...7...5........987..................5.6....3........7. .6........1......4...2.9......6.......1.5............7..5.............28......4.9 6.....9.......4....7........635..............8.5.....1...4......4..2............. .........2...98.................61..4..3.7..8..7....5.964...31..7.............49.

Question [FISHY - singles, locked candidates, pairs, triples, quads, fishes]

Code: Select all: .............3.....3...7........1..6..8...5.46...2.9..7.....3....9....1..6....... ..........7........6...9......7...8...89..325.2..3......1..........4.....9....... ...8..2....7...6........9........1......64.......8.....2..............1.........4 .9834........8.1........................2...........................4........7... ......6....25..7...................7............6......6..93............8.5...... ......47.........9.3...8...........4.......8.9....5...7............3.6........... .8...........95.3....7.3.........7..............2.......2.....8.................. 3.............8...............9.......6.....89..3.1.24.............1............. ....................9..6..4.57.9.3.8....3....4..257....467....23......8.7.1....6.

ATTACHMENT
three-questions.zip (51,909 bytes)

by **Hajime** » Tue Jul 03, 2018 7:07 pm

Nice puzzles. I can solve puzzles with fishes, but I can not generate them. Fish is too rare. Maybe I haven't enough patience. You created a nice set. Thanks.

The New Sudoku Players' Forum

irregular ? clueless

irregular ? clueless

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Re: irregular ? clueless

Re: irregular ? clueless

Re: irregular ? clueless

3 irregular q's

Re: irregular ? clueless