The New Sudoku Players' Forum

by **wapati** » Wed May 23, 2007 4:48 am

This is a good one, I think.

I have added Sudo Phil to the solvers I check when I look at a puzzle.
Sudo phil looks at how many of each technique are needed. I am thinking
that that does matter and I prefer that to SE rating based on the single "hardest" method.

Anyways, google Sudo Phil or not. I like it. http://pgailhac.free.fr/indexa.html

I also use SE, SQ, SA, SS every day, and some others less often, but often.

Code: Select all: . 9 .|. . 8|. . . 1 4 8|. . .|. 3 . . 6 .|. 4 .|2 . . -----+-----+----- . . .|. 2 7|. . 3 . . 4|9 . 3|5 . . 3 . .|4 5 .|. . . -----+-----+----- . . 9|. 7 .|. 5 . . 2 .|. . .|1 6 4 . . .|5 . .|. 9 .

Typo edit

by **wapati** » Thu May 24, 2007 4:10 am

Funny, this. Solvers tend to think this a bit easier than it is.

Code: Select all: . . .|4 1 .|. 5 . 3 . .|. . 8|. . 1 . . .|5 . .|8 9 . -----+-----+----- 5 . 7|. . .|. 3 . . 3 .|. . .|. 2 . . 1 .|. . .|4 . 9 -----+-----+----- . 9 3|. . 1|. . . 2 . .|9 . .|. . 6 . 5 .|. 7 6|. . .

by **wapati** » Fri May 25, 2007 4:04 am

There are a lot of givens. Like, that helped?

Code: Select all: . . .|. . .|4 7 . . . 1|7 5 .|. 6 2 8 . 7|. . .|5 . 9 -----+-----+----- . . .|. 8 1|. . . 5 . .|4 . 9|. . 1 . . .|5 2 .|. . . -----+-----+----- 2 . 4|. . .|1 . 6 1 7 .|. 3 4|9 . . . 9 8|. . .|. . .

by **wapati** » Sun May 27, 2007 12:13 am

Delicious puzzle, big fish and fins !

SQ rates this pretty low and yet it is amongst the hardest puzzles I have seen that will submit to patterns.

I suspect that "fins" is throwing a curve at all solvers.

Code: Select all: 5 . .|. 8 .|. . 2 . . 6|9 . 2|3 . . . . .|. . .|. . . -----+-----+----- . . .|. . .|. . . 3 . 5|. . .|6 . 9 8 . 9|5 . 7|2 . 4 -----+-----+----- 6 . 4|2 . 1|7 . 8 . . .|. 5 .|. . . 2 . 3|. 7 .|4 . 6

by **wapati** » Sun May 27, 2007 1:36 am

Bonus puzzle. I got today off, I usually work 6 days per.

Jelly and Swords by SE. Swords and sashimi sword by SQ.
Other solvers tend to freak.

Code: Select all: 4 . 6|. . 2|. . . . . .|. . 4|. . . . 5 .|3 . .|1 . . -----+-----+----- . 8 .|1 . .|9 3 . . . .|. . .|. 2 . . 2 .|9 . .|8 5 . -----+-----+----- . 3 .|8 . .|5 . . . . .|. . 7|. . . 7 . 1|. . 9|. . .

by **wapati** » Sun May 27, 2007 1:59 am

This one may be less hard.
It does need 4 different advanced methods. (That works for me!)

Code: Select all: 6 . .|2 1 .|. . 7 . . .|8 3 9|. . . . 2 .|. . .|. 9 . -----+-----+----- 1 . 7|. . .|5 . 3 . 4 .|. . .|. 8 . 9 . 5|. . .|7 . 6 -----+-----+----- . 1 .|. . .|. 5 . . . .|4 5 6|. . . 5 . .|3 2 .|. . 9

by **wapati** » Sun May 27, 2007 12:17 pm

There are several swordfish here...finned though.

Code: Select all: . . .|3 . .|. 5 . . . .|. 6 .|7 . 9 . . .|. . 1|4 6 . -----+-----+----- 5 . .|7 3 .|8 . . . 4 .|6 . 2|. 3 . . . 2|. 1 8|. . 6 -----+-----+----- . 7 4|1 . .|. . . 3 . 9|. 2 .|. . . . 2 .|. . 7|. . .

by **daj95376** » Mon May 28, 2007 1:08 am

wapati wrote:Bonus puzzle. I got today off, I usually work 6 days per.

Jelly and Swords by SE. Swords and sashimi sword by SQ.
Other solvers tend to freak.

Code: Select all
4 . 6|. . 2|. . . . . .|. . 4|. . . . 5 .|3 . .|1 . . -----+-----+----- . 8 .|1 . .|9 3 . . . .|. . .|. 2 . . 2 .|9 . .|8 5 . -----+-----+----- . 3 .|8 . .|5 . . . . .|. . 7|. . . 7 . 1|. . 9|. . .

A very nice puzzle with many fun and standard solving techniques up front. Then ...

This puzzle reduces to two complimentary Jellyfish in <6>.

Performing colors, starting at [r2c8] and using only cells in the Jellyfish, results in a contradiction -- showing that both Jellyfish are invalid.

Ironically, [c2478] was used okay as part of a Jellyfish earlier in the solution.

Code: Select all: # Jellyfish r2589/c2478 in <6> -and- # Jellyfish c2478/r2589 in <6> *--------------------------------------------------* | 4 17 6 | 5 19 2 | 37 89 38 | | 38 17 38 |*67 19 4 | 2 *69 5 | | 29 5 29 | 3 67 8 | 1 4 67 | |----------------+----------------+----------------| | 56 8 47 | 1 2 56 | 9 3 47 | | 359 *46 359 | 47 8 35 |*67 2 1 | | 1 2 347 | 9 47 36 | 8 5 467 | |----------------+----------------+----------------| | 26 3 24 | 8 46 1 | 5 7 9 | | 58 9 58 |*46 3 7 |*46 1 2 | | 7 *46 1 | 2 5 9 |*346 *68 38 | *--------------------------------------------------*

by **wapati** » Mon May 28, 2007 8:58 am

This one has finned big fish, although smaller patterns can bypass them.

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

by **wapati** » Tue May 29, 2007 4:43 am

This one has a finned big fish, although smaller patterns can bypass it.

Deja vu !

Code: Select all: 5 . .|1 2 .|. 9 4 . . 9|. . .|. . 2 . 1 .|. . 9|. . . -----+-----+----- 8 . .|. 1 .|5 . . 4 . .|8 . 6|. . 3 . . 2|. 5 .|. . 1 -----+-----+----- . . .|2 . .|. 6 . 1 . .|. . .|2 . . 3 2 .|. 6 4|. . 7

by **wapati** » Wed May 30, 2007 5:12 am

Oh what a tangled web we weave
When first we practice to deceive. - Sir Walter Scott (Marmion, 1808)

This puzzle is worthy. Looks easy. Perhaps not?

Code: Select all: . . 4|9 . 5|. 1 . 5 . 8|. . .|3 . . 7 . .|. . .|. 5 6 -----+-----+----- . . .|. 6 .|. 9 . 2 . .|5 . 3|. . 1 . 4 .|. 2 .|. . . -----+-----+----- 1 2 .|. . .|. . 5 . . 7|. . .|1 . 3 . 6 .|7 . 1|9 . .

by **wapati** » Fri Jun 01, 2007 4:36 am

SE finds this WAY harder than I do.
(SE does not know fins.)

Code: Select all: . . .|9 . .|5 4 . . . .|. 1 8|. . . . 6 .|3 . .|. . . -----+-----+----- 8 4 .|. . .|. 5 6 9 . .|6 . 5|. . 3 6 5 .|. . .|. 1 8 -----+-----+----- . . .|. . 9|. 3 . . . .|2 4 .|. . . . 7 8|. . 3|. . .

by **wapati** » Fri Jun 01, 2007 4:40 am

Just busy!

Code: Select all: . . 9|. 1 .|. . 2 8 . .|. . .|9 6 . 2 . .|8 . .|3 . 1 -----+-----+----- . . .|. 4 1|. . . . 6 .|7 . 8|. 1 . . . .|9 6 .|. . . -----+-----+----- 7 . 3|. . 5|. . 9 . 9 2|. . .|. . 7 6 . .|. 7 .|8 . .

by **wapati** » Sat Jun 02, 2007 9:49 am

There is a swordfish, 5 xys and a few others.
SE rates this only 4.4 but it is quite tangled!

Code: Select all: 1 7 .|4 . 5|. 3 9 . . .|8 . 1|. . . . . 4|. . .|2 . . -----+-----+----- . . .|5 . 6|. . . . 2 .|. 3 .|. 6 . . . 3|. 4 .|5 . . -----+-----+----- . 1 .|. . .|. 7 . 7 4 .|. . .|. 9 2 . . 9|. 8 .|4 . .

by **wapati** » Sat Jun 02, 2007 9:59 am

This puzzle has 2 finned jellies, and a sashimi sword. :!:

SQ rates it about 3100 while SE (no fins) sees it as 7.8

Code: Select all: 4 . .|. . 3|. . 6 . . .|8 . .|4 . . . . 6|1 . 4|. 9 . -----+-----+----- 6 . 4|. . 8|. 7 . . . .|. . .|. . 3 8 . 3|. . 6|. 1 . -----+-----+----- . . 8|9 . 5|. 3 . . . .|4 . .|1 . . 7 . .|. . 1|. . 5

The New Sudoku Players' Forum

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