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Puzzle 11/03/15: ~ Moderate

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daj95376

Joined: 23 Aug 2008
Posts: 3854

Posted: Tue Mar 15, 2011 6:35 pm Post subject: Puzzle 11/03/15: ~ Moderate

Code:

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

Play this puzzle online at the Daily Sudoku site

daj95376

Joined: 23 Aug 2008
Posts: 3854

Posted: Sat Mar 19, 2011 5:13 pm Post subject:

Code:

r17c8 Skyscraper <> 4 r9c5,r2c6 extraneous

+--------------------------------------------------------------+
| 6 9 3 | 5 47 8 | 2 14 17 |
| 8 2 15 | 3 47 16 | 4567 9 57 |
| 145 145 7 | 9 2 16 | 3 56 8 |
|--------------------+--------------------+--------------------|
| 15 8 2 | 4 156 7 | 56 3 9 |
| 3 57 4 | 2 569 59 | 8 156 157 |
| 9 157 6 | 8 15 3 | 57 2 4 |
|--------------------+--------------------+--------------------|
| 7 3 9 | 6 8 45 | 1 45 2 |
| 2 145 15 | 7 3 459 | 459 8 6 |
| 45 6 8 | 1 59 2 | 459 7 3 |
+--------------------------------------------------------------+
# 45 eliminations remain

W-Wing: (6=5)r3c8 - r2c9 = r5c9 - (5=6)r4c7 => r2c7,r5c8<>6
W-Wing: (6=5)r3c8 - r7c8 = r89c7 - (5=6)r4c7 => r2c7,r5c8<>6
S-Wing: (6)r4c7 = r2c7 - (6=5)r3c8 - r2c9 = (5)r5c9 => r4c7<>5
S-Wing: (6)r4c7 = r5c8 - (6=5)r3c8 - r2c9 = (5)r5c9 => r4c7<>5
S-Wing: (5)r2c9 = r5c9 - (5=6)r4c7 - r2c7 = (6)r3c8 => r3c8<>5
S-Wing: (5)r2c9 = r5c9 - (5=6)r4c7 - r5c8 = (6)r3c8 => r3c8<>5
S-Wing: (6)r3c8 = r5c8 - (6=5)r4c7 - r89c7 = (5)r7c8 => r3c8<>5
S-Wing: (6)r4c7 = r2c7 - (6=5)r3c8 - r7c8 = (5)r89c7 => r4c7<>5
S-Wing: (6)r4c7 = r5c8 - (6=5)r3c8 - r7c8 = (5)r89c7 => r4c7<>5
S-Wing: (6)r3c8 = r2c7 - (6=5)r4c7 - r89c7 = (5)r7c8 => r3c8<>5

-or-

XY-Chain: (5=7)r2c9 =1r1c9 =4r1c8 =5r7c8 => r3c8<>5

Marty R.

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

Posted: Sat Mar 19, 2011 5:52 pm Post subject:

I just plain forgot to post. I used a Skyscraper on 4 and a W-Wing on 56; r2c7, r5c8<>6.

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