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Puzzle 11/02/22 Moderate

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daj95376

Joined: 23 Aug 2008
Posts: 3854

Posted: Tue Feb 22, 2011 3:39 am Post subject: Puzzle 11/02/22 Moderate

Code:

+-----------------------+
| . 3 2 | 8 . . | 9 . 1 |
| 9 8 7 | . . 4 | . 5 . |
| 6 5 . | . . . | 4 . . |
|-------+-------+-------|
| 8 . . | 5 . . | . . 9 |
| . . . | . 7 2 | . . . |
| . 4 . | . 8 9 | . 1 . |
|-------+-------+-------|
| 7 . 4 | . . . | . 8 . |
| . 9 . | . . 8 | 1 . . |
| 3 . . | 7 . . | . . . |
+-----------------------+

Play this puzzle online at the Daily Sudoku site

tlanglet

Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills

Posted: Wed Feb 23, 2011 2:50 am Post subject:

#1: xy-wing 2-34 vertex (24)r8c4; r5c8<>3

Code:

*-----------------------------------------------------------------------------*
| 4 3 2 | 8 56 567 | 9 67 1 |
| 9 8 7 | 12 1236 4 | 236 5 26 |
| 6 5 1 | 29 239 37 | 4 237 8 |
|-------------------------+-------------------------+-------------------------|
| 8 7 3 | 5 4 1 | 26 26 9 |
| 1 6 9 | 3 7 2 | 8 4 5 |
| 2 4 5 | 6 8 9 | 7 1 3 |
|-------------------------+-------------------------+-------------------------|
| 7 12 4 | 129 123569 356 | 2356 8 26 |
| 5 9 6 | 4 23 8 | 1 23 7 |
| 3 12 8 | 7 1256 56 | 256 9 4 |
*-----------------------------------------------------------------------------*

#2: Two steps at this point; both use the same links and provide the identical result but are distinctly different approaches.
Pattern A: simple coloring in (3); r2c5,r3c8,r7c7,r8c5<>3

Pattern B: ANT(126=3)r2c459-r8c5=r8c8-r3c8=(3)r2c7 Conflict; R2c5<>3

Code:

*--------------------------------------------------*
| 4 3 2 | 8 56 567 | 9 67 1 |
| 9 8 7 | 12 16 4 | 3 5 26 |
| 6 5 1 | 29 39 37 | 4 27 8 |
|----------------+----------------+----------------|
| 8 7 3 | 5 4 1 | 26 26 9 |
| 1 6 9 | 3 7 2 | 8 4 5 |
| 2 4 5 | 6 8 9 | 7 1 3 |
|----------------+----------------+----------------|
| 7 12 4 | 19 39 356 | 256 8 26 |
| 5 9 6 | 4 2 8 | 1 3 7 |
| 3 12 8 | 7 156 56 | 256 9 4 |
*--------------------------------------------------*

(2=9)r3c4-(9=1)r7c4-AUR(56)r19c56[(1)r9c5=(7)r1c6]-(7=6)r1c8-(6=2)r2c9; r2c4,r3c8<>2

Ted

Marty R.

Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

Posted: Wed Feb 23, 2011 5:22 am Post subject:

XY-Wing (243); r5c8<>3 Finned X-Wing; r2c5<>3 W-Wing (12); r7c4<>1

daj95376

Joined: 23 Aug 2008
Posts: 3854

Posted: Wed Feb 23, 2011 5:24 am Post subject:

Ted, In your first grid: finned X-Wing r38c58 => r2c5<>3 In your second grid: <56> UR r19c56 => r2c5=6

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