## Sudokus with an original rare shape

Everything about Sudoku that doesn't fit in one of the other sections

### A stripe sprangled sudoku

Code: Select all
`. 7 . . 2 . . 9 .9 . . 6 . . 5 . .. . 1 . . 4 . . .. . . . 8 . . 6 .. 4 . . . . 7 . .8 . . 5 . . . . 2. . 3 . . 9 . . .. 6 . . 7 . . 8 .2 . . 1 . . 4 . .            Broken Stripes`

Happy solving!

Claudia
claudiarabia

Posts: 288
Joined: 14 May 2006

### UR Type 1 <58>

daj95376 wrote:Claudia,
Code: Select all
`. . . . . . . . . . 2 4 . . . 8 6 . . 8 . 7 . 5 4 . . . 9 . . 4 8 . 1 . . . . 2 . 3 . . . . 4 . 1 7 . . 3 . . . 2 3 . 6 . 8 . . 3 9 . . . 7 2 . . . . . . . . . .  `
Did you catch the UR Type 1 on <58>? It eliminates the XY-Chain and make both variants of this puzzle have identical solutions.

[Update:] It occurs to me that you might be using an XY-Chain where Simple Sudoku chose to use Multi-Coloring. If so, then the UR Type 1 wouldn't affect your solution. I'm sorry if I only made things confusing!

Sorry, I didn't spot the UR Type 1 on <58>. Do you mean c4 in r8 and 9? Maybe I solved the cells around another way.

Anyway, After using the "simple past"-method, I chose to make a chain out of the three free cells in column 8: r1 = 57, r 5 = 47, r9 = 45. I assumed r5c8 to be 4 and found a contradiction then while trying to complete the box containing r4-6 c1-3. The puzzle was solved then very easily too.

Claudia
claudiarabia

Posts: 288
Joined: 14 May 2006

Yes, the UR Type 1 was off <58> in [r89c14]. Another way is to use Colors and Multi-Colors to get the same elimination of [r9c1]<>58. It's possible that you took this route. Anyway, after the UR elimination, Colors and Multi-Colors are all that's needed (besides singles) to complete the puzzle.
daj95376
2014 Supporter

Posts: 2624
Joined: 15 May 2006

### a 21-clue sudoku rated 8,4 by Sudoku-Explainer

Code: Select all
`3 . . . 7 . . . 1 . 8 . . . . . 5 . . . . 9 . . 6 . . . 6 . . . 1 . 8 . . . . . 4 . . . . . 5 . 2 . . . 9 . . . 4 . . 5 . . . . 9 . . . . . 2 . 5 . . . 3 . . . 7`
who likes it minimal may omit r9c1.

Claudia
claudiarabia

Posts: 288
Joined: 14 May 2006

### stuck with the SE-Level 8,4

Code: Select all
`3 . 9 . . . . . .. 7 . 3 . 5 . . .8 . . . 1 . . . .. . . 7 . 6 . 2 .. . 4 . . . 7 . .. 3 . . . 9 . 5 .6 . . . 8 . . . 3. 9 . 1 . . . 6 .. . 1 . . . 4 . 5   Catamaran`

Claudia
claudiarabia

Posts: 288
Joined: 14 May 2006

Here is a brand-new model : lighter and easier to control

Code: Select all
` . . 8 . . . . . . . 9 . 6 . . . . . 4 . . . 1 . . . . . . . 7 . 5 . . . . . 4 . . . 1 . . . 3 . . . 9 . 5 . 2 . . . 8 . . . 9 . 5 . 9 . . . 7 . . . 7 . . . 4 . .`

JPF
JPF
2017 Supporter

Posts: 3752
Joined: 06 December 2005
Location: Paris, France

JPF wrote:Your catamaran is very nice.

Here is a brand-new model : lighter and easier to control

Code: Select all
` . . 8 . . . . . . . 9 . 6 . . . . . 4 . . . 1 . . . . . . . 7 . 5 . . . . . 4 . . . 1 . . . 3 . . . 9 . 5 . 2 . . . 8 . . . 9 . 5 . 9 . . . 7 . . . 7 . . . 4 . .`

JPF

Thanks for this 20-clue version. Yes it's a beauty. Not only lighter but faster too. And safer for I can recover from turbot-fish-attacks this time.

Claudia
claudiarabia

Posts: 288
Joined: 14 May 2006

Code: Select all
` . . . . . . . . 5 . . 1 7 . . . 4 . . 2 . . 9 . 8 . . . 1 . . . 7 . . . . . 3 . . . 2 . . . . . 1 . . . 5 . . . 5 . 3 . . 1 . . 8 . . . 2 6 . . 9 . . . . . . . .     spinning top`

easy

JPF
JPF
2017 Supporter

Posts: 3752
Joined: 06 December 2005
Location: Paris, France

Code: Select all
`. . . . . . . . .8 . . . 2 . . . 5. . . . . 6 2 4 .. 3 . . . 7 1 . .1 . 5 . . . 6 . 9. . 7 4 . . . 2 .. 7 2 5 . . . . .6 . . . 8 . . . 1. . . . . . . . .`

Not as straight as ab's slashes but still challenging.

Claudia
claudiarabia

Posts: 288
Joined: 14 May 2006

### soft hearts

maria45 wrote:I don't know if these true hearts are already known. Thanks to ajb:
Code: Select all
`.15...26.9..4.1..88...2...34.......62.......7.6.....5...9...1.....5.7.......9.....79...43.6..2.5..93...7...58.......7.2.....8..4.....6...6...5.....7.4.......1....`
easy to solve, so just for the soft hearted.

Thank you. Not known to me until now.

Claudia
claudiarabia

Posts: 288
Joined: 14 May 2006

Code: Select all
`.........8...2...5.....624..3...71..1.5...6.9..74...2..725.....6...8...1.........# after basic eliminations *--------------------------------------------------------------------* | 3457   2      1369   | 1389   459    3589   | 389    13689  3678   | | 8      169    13469  | 7      2      349    | 39     1369   5      | | 357    159    139    | 1389   59     6      | 2      4      378    | |----------------------+----------------------+----------------------| | 2      3      68     | 69     569    7      | 1      58     4      | | 1      4      5      | 28     3      28     | 6      7      9      | | 9      68     7      | 4      156    15     | 358    2      38     | |----------------------+----------------------+----------------------| | 34     7      2      | 5      1469   139    | 3489   3689   68     | | 6      59     349    | 23     8      234    | 7      35     1      | | 345    18     18     | 369    7      39     | 3459   3569   2      | *--------------------------------------------------------------------*[r4c5]=5 =>                         [r6c6]=1         => [r3c5]=9 => [r1c5]=4 => [r2c6]=3 => [b8]=INVALIDTherefore, [r4c5]<>5`

Puzzle solves with singles from here.
daj95376
2014 Supporter

Posts: 2624
Joined: 15 May 2006

A spider maybe ...

Code: Select all
` . 3 . . 4 . . . 6 . . . . . . 5 3 . . . . . . . . 1 . . . 1 2 . . . . . . 4 . . 5 . . . 8 9 . . . . 7 . . . 2 . . . . 6 . . . . 5 . . 3 . . . 4 . . 7 1 . . . . .`

A very difficult spider BTW.
ronk
2012 Supporter

Posts: 4764
Joined: 02 November 2005
Location: Southeastern USA

ronk wrote:A spider maybe ...
A very difficult spider BTW.

When I look at the solution given by some web solvers to your puzzle,
it looks like a spider's web.

Some variations :
Code: Select all
`050040006000000530000000010001200000040050008900007000200006000080030004007100000030040002000000530000000010001600000040050008600007000200006000050080004007100000`

JPF
JPF
2017 Supporter

Posts: 3752
Joined: 06 December 2005
Location: Paris, France

JPF wrote:When I look at the solution given by some web solvers to your puzzle

Wish it were mine. However, it's merely a permutation of an Ocean "X puzzle" from here ... with one clue deleted.

Ocean wrote:# ER-9.9:
100000002030040050006000700000103000040060080000405000002000900050030040700000001
ronk
2012 Supporter

Posts: 4764
Joined: 02 November 2005
Location: Southeastern USA

ronk wrote:However, it's merely a permutation of an Ocean "X puzzle"

Well done !

JPF
JPF
2017 Supporter

Posts: 3752
Joined: 06 December 2005
Location: Paris, France

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