## Collection December 30, 2012

Post puzzles for others to solve here.

### Collection December 30, 2012

Code: Select all
` *-----------* |8.4|.52|.1.| |7.2|.4.|...| |...|1..|.49| |---+---+---| |.3.|7..|...| |5..|...|.82| |...|..1|.3.| |---+---+---| |..7|6..|...| |...|..5|1.6| |...|.7.|...| *-----------*`

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dan

ArkieTech

Posts: 2980
Joined: 29 May 2006
Location: NW Arkansas USA

### Re: Collection December 30, 2012

Code: Select all
`*--------------------------------------------------------------------------------*| 8       9       4        | 3       5       2        | 6       1       7        || 7       1       2        | 9       4       6        | 38      5       38       || 36      56      356      | 1       8       7        | 2       4       9        ||--------------------------+--------------------------+--------------------------|| 4       3       9        | 7       2       8        | 5       6       1        || 5       67      1        | 4       369     39       | 79      8       2        ||a26      2678    68       | 5      b69      1        | 79      3       4        ||--------------------------+--------------------------+--------------------------|| 239     258     7        | 6       1       349      | 348     29      358      ||d39-2    4       38       | 28     c39      5        | 1       7       6        || 1       2568    3568     | 28      7       349      | 348     29      358      |*--------------------------------------------------------------------------------*`

H Wing (2=6) r6c1 - (6=9) r6c5 - r8c5 = r8c1 => r8c1 <2>; stte

Leren
Leren

Posts: 3315
Joined: 03 June 2012

### Re: Collection December 30, 2012

I initially found 4 or 5 ADPs but all of the combined deletions still did not solve the puzzle. A bad day for ADPs.

(7=6)r5c2-(6=8)r6c3-(8=3)r8c3-(3=9)r8c5-r556c5=r5c6-(9=7)r5c7-(7=6)r5c2 Loop => r6c12<>6, r9c3<>8, r8c1<>3, r5c5<>9
tlanglet
2010 Supporter

Posts: 538
Joined: 29 May 2010

### Re: Collection December 30, 2012

DP 56 in r39c23: r3c1=6 or r9c9=5.
r3c1=6->r6c1=2
[Edit: oops, my shortcut was false)
r9c9=5->r7c2=5->r3c2=6->r5c2=7->r5c7=9->r5c6=3->r8c5=3->r8c3=8->r6c3=6->r6c1=2

However you can have it a bit easier with
(6=9)r6c5-(9=3)r8c5-(8=3)r8c3-(8=6)r6c3; r6c12<>6
(which is part of the above chain)
eleven

Posts: 1875
Joined: 10 February 2008

### Re: Collection December 30, 2012

eleven wrote:

DP 56 in r39c23: r3c1=6 or r9c9=5.
r3c1=6->r6c1=2
[Edit: oops, my shortcut was false)
r9c9=5->r7c2=5->r3c2=6->r5c2=7->r5c7=9->r5c6=3->r8c5=3->r8c3=8->r6c3=6->r6c1=2

However you can have it a bit easier with
(6=9)r6c5-(9=3)r8c5-(8=3)r8c3-(8=6)r6c3; r6c12<>6
(which is part of the above chain)

Guess I should have said "A bad day for ME" since I missed that long chain with 5r7c2.

Ted
tlanglet
2010 Supporter

Posts: 538
Joined: 29 May 2010

### Re: Collection December 30, 2012

A continuous nice loop:

(5=6)r3c2 - (6)r9c2 = (6-5)r9c3 = (5)r3c3 - r3c2: loop; r56c2 <> 6; r9c3 <> 3,8

Phil
pjb
2014 Supporter

Posts: 2025
Joined: 11 September 2011
Location: Sydney, Australia

### Re: Collection December 30, 2012

I also found a similar continuous Nice loop based on the ANS XY Wing concept:

(2=6) r6c1 - (6=8) r6c3 - r8c3 = 2 r8c1 [(2389)ANS r8c135] - r6c1: loop; r56c2, r6c5 <> 6, r9c3 <> 8, r7c1 <> 2

I prefer the H wing

Leren
Leren

Posts: 3315
Joined: 03 June 2012

### Re: Collection December 30, 2012

Code: Select all
`+---------------+------------+------------+| 8   9    4    | 3  5   2   | 6   1  7   || 7   1    2    | 9  4   6   | 38  5  38  || 36  56   356  | 1  8   7   | 2   4  9   |+---------------+------------+------------+| 4   3    9    | 7  2   8   | 5   6  1   || 5   67   1    | 4  369 39  | 79  8  2   || 26  2678 68   | 5  69  1   | 79  3  4   |+---------------+------------+------------+| 239 258  7    | 6  1   349 | 348 29 358 || 239 4    38   | 28 39  5   | 1   7  6   || 1   2568 3568 | 28 7   349 | 348 29 358 |+---------------+------------+------------+`

Play this puzzle online at the Daily Sudoku site

M-Wing on 56.

(6=5)r3c2-r3c3=(5-6)r9c3=6r9c2=>r56c2<>6
Marty R.

Posts: 1508
Joined: 23 October 2012
Location: Rochester, New York, USA