The New Sudoku Players' Forum

by **ronk** » Wed Feb 21, 2007 2:10 pm

ravel wrote:A lot of fish in there, i think i had 5 turbot fish, a finned x-wing, three times 3 strong links and this creature, i cannot identify:
Code: Select all
4 . . | 4 4 . | . 4 4 . . . | 4 . . | . . 4 . . 4 | .-4 . | . 4 4 ----------------------- 4 4 . | 4 . . | . . 4 4 . . | . 4 . | . .-4 4 . . |-4 . . | . 4 4 ----------------------- . . . | . . 4 | . . . . . . | . . . | 4 . . . 4 4 | . . . | . . .

I suspect you mean a single fish for all three eliminations, but don't even see one for just two eliminations. However, there are two grouped finned x-wings (aka grouped turbot fish, 2-string kites) and a finned swordfish (aka grouped x-cycle length=7).

Code: Select all: Key: '*' <=> fish cell '#' <=> fin cell '/' <=> required empty cell '-' <=> exclusion cell 4 . . | 4 4 . | .*4 4 / / / |#4 / / | . .*4 . . 4 | . 4 . | .*4 4 ----------------------- 4 4 . | 4 . . | . / 4 4 . . | . 4 . | . / 4 4 . . |-4 . . | .*4 4 ----------------------- . . . | . . 4 | . / . . . . | . . . | 4 / . . 4 4 | . . . | . / . finned x-wing r2c8\r6b3 plus fin r2c4, implies r6c4<>4 4 . . | 4*4 . | . 4 4 / / / |*4 . . | / /*4 . . 4 | .*4 . | . 4 4 ----------------------- 4 4 . | 4 / . | . . 4 4 . . | .#4 . | . .-4 4 . . | 4 / . | . 4 4 ----------------------- . . . | . / 4 | . . . . . . | . / . | 4 . . . 4 4 | . / . | . . . finned x-wing r2c5\c9b2 plus fin r5c5, implies r5c9<>4 *4 / / | 4 4 . | . 4 4 . / / | 4 . . | . . 4 . .*4 | .-4 . | . 4 4 ----------------------- *4*4 . |*4 . . | . . 4 *4 / / | /#4 / | . . 4 *4 / / | / . / | . 4 4 ----------------------- . . . | . . 4 | . . . . . . | . . . | 4 . . . 4 4 | . . . | . . . finned swordfish b145\r34c1 plus fin r5c5, implies r3c5<>4

by **ravel** » Wed Feb 21, 2007 3:04 pm

Thanks, Danny and Ron. Those finned big fish are really hard to spot.
btw, only the ER or finned x-wing for r6c4 was needed here. So it can be solved with basics, (advanced) coloring and finned x-wing.

by **wapati** » Thu Feb 22, 2007 2:26 am

Quite a challenge, this!

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

by **wapati** » Thu Feb 22, 2007 10:40 pm

Some Uniqueness in this.

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

by **Carcul** » Fri Feb 23, 2007 1:26 pm

Wapati wrote:Some Uniqueness in this.

Code: Select all: *-------------------------------------------------------------* | 3 1 89 | 89 5 4 | 6 7 2 | | 6 4 589 | 3 27 27 | 58 589 1 | | 2589 2589 7 | 189 689 1689 | 3 589 4 | |--------------------+---------------------+------------------| | 258 2568 13 | 7 4 28 | 12 2356 9 | | 7 29 13 | 6 29 5 | 14 34 8 | | 4 25689 5689 | 289 1 3 | 7 256 56 | |--------------------+---------------------+------------------| | 1 3 4 | 258 2678 2678 | 9 2568 56 | | 589 7 5689 | 12589 2689 12689 | 24 24568 3 | | 589 5689 2 | 4 3 689 | 58 1 7 | *-------------------------------------------------------------*

[r9c7]-5-[r7c5689]-2-[r8c7]=2=[r4c7](-2-[r6c89]-6-[r6c3]=6=[r8c3])-2-
-[r4c16]-5-[r89c1]=5=[r9c2]-5-[r9c7], => r9c7<>5 and the puzzle is solved.

Carcul

by RW » Fri Feb 23, 2007 5:09 pm

Carcul wrote:
Code: Select all
*-------------------------------------------------------------* | 3 1 89 | 89 5 4 | 6 7 2 | | 6 4 589 | 3 27 27 | 58 589 1 | | 2589 2589 7 | 189 689 1689 | 3 589 4 | |--------------------+---------------------+------------------| | 258 2568 13 | 7 4 28 | 12 2356 9 | | 7 29 13 | 6 29 5 | 14 34 8 | | 4 25689 5689 | 289 1 3 | 7 256 56 | |--------------------+---------------------+------------------| | 1 3 4 | 258 2678 2678 | 9 2568 56 | | 589 7 5689 | 12589 2689 12689 | 24 24568 3 | | 589 5689 2 | 4 3 689 | 58 1 7 | *-------------------------------------------------------------*

[r9c7]-5-[r7c5689]-2-[r8c7]=2=[r4c7](-2-[r6c89]-6-[r6c3]=6=[r8c3])-2-
-[r4c16]-5-[r89c1]=5=[r9c2]-5-[r9c7], => r9c7<>5 and the puzzle is solved.

Eh? [r9c7]-5-[r7c56..] :?:

[r7c56..]-2-[r8c7] :?:

Care to explain? Or have I missed some new hyperlink you have invented?

RW

by **wapati** » Fri Feb 23, 2007 10:51 pm

This one is quite busy, but easier than the last couple I posted.

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

Edited for typo

by **ronk** » Fri Feb 23, 2007 11:50 pm

RW wrote:Care to explain? Or have I missed some new hyperlink you have invented?

Obviously (in the Carcul sense) the hyperlink uses the UR Type 4 in r27c56 and the ALS in r7c5689.

by **wapati** » Sat Feb 24, 2007 4:37 am

I was going to toss this one, no big fish.

It is quite hard and I think it deserves attention.

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

by **wapati** » Sat Feb 24, 2007 4:43 am

Harder than I prefer to deal with, a great puzzle!

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

by **wapati** » Sat Feb 24, 2007 5:03 am

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

Tang, it was travel food.

by **wapati** » Sat Feb 24, 2007 5:15 am

Tang is/was powdered orange juice.

Required booster on camping treks.

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

by **daj95376** » Sat Feb 24, 2007 11:26 am

wapati wrote:Harder than I prefer to deal with, a great puzzle!

Fun puzzle! Finned Swordfish was kicker.

# 4x Locked Candidate (1)
# finned X-Wing r18/c17 in <3>
# finned X-Wing r25/c59 in <4>
# Locked Candidate (1), Naked Triple, Naked Pair, and Locked Candidate (2)
# finned Swordfish c158/r359 in <7>
# Locked Candidate (2), 2x Locked Candidate (1), Swordfish in <7>, and XY-Wing

by **Carcul** » Sat Feb 24, 2007 12:05 pm

Ronk wrote:the hyperlink uses the UR Type 4 in r27c56 and the ALS in r7c5689.

That's right.

Carcul

by **Carcul** » Sat Feb 24, 2007 1:26 pm

Wapati wrote:This one is quite busy, but easier than the last couple I posted.

Code: Select all: *---------------------------------------------------------------* | 4 157 6 | 8 579 3 | 159 1579 2 | | 79 57 8 | 2 46 1 | 3 46 579 | | 2 3 1579 | 579 46 579 | 46 8 1579 | |---------------------+--------------------+--------------------| | 5 8 17 | 79 2 4 | 19 3 6 | | 17 6 24 | 3 579 8 | 12459 14579 1579 | | 3 9 24 | 6 1 57 | 245 457 8 | |---------------------+--------------------+--------------------| | 1789 157 13579 | 579 38 5679 | 1569 2 4 | | 189 2 1359 | 4 38 569 | 7 1569 159 | | 6 4 579 | 1 579 2 | 8 59 3 | *---------------------------------------------------------------*

1. r3c7=4, otherwise the puzzle would have two solutions.

2. [r3c3](-1-[r78c3])-1-[r4c3](=1=[r4c7]-1-[r1c7])(-7-[r7c3])-7-[r9c3]=7=[r9c5]-7-[r7c46]-5,9-[(r7c3)]-3-[r8c3]=3|1=[r8c8]-1-[r1c8]=1=[r1c2]-1-[r3c3], => r3c3<>1 and the puzzle is solved.

Carcul

The New Sudoku Players' Forum

CHAINS, not required. Good puzzles.