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Puzzle 10/07/08: XY

dailysudoku.com Forum Index -> Puzzles by daj

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daj95376

Joined: 23 Aug 2008
Posts: 3854

Posted: Thu Jul 08, 2010 3:53 pm Post subject: Puzzle 10/07/08: XY

Code:

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

Play this puzzle online at the Daily Sudoku site

Code:

after basics
+-----------------------------------------------------+
| 6 24 28 | 34 5 7 | 1 38 9 |
| 348 9 5 | 34 6 1 | 2 7 348 |
| 34 7 1 | 2 8 9 | 6 5 34 |
|-----------------+-----------------+-----------------|
| 29 23 7 | 5 1 4 | 389 6 38 |
| 1 8 39 | 7 2 6 | 39 4 5 |
| 5 6 4 | 8 9 3 | 7 2 1 |
|-----------------+-----------------+-----------------|
| 27 1 28 | 9 47 5 | 348 38 6 |
| 48 5 6 | 1 3 2 | 48 9 7 |
| 79 34 39 | 6 47 8 | 5 1 2 |
+-----------------------------------------------------+
# 30 eliminations remain

pincer transport wrote:

(t) gM-Wing: (3=4)r1c4 - r1c2 = (4-3)r9c2 = r4c2 - r4c9 = (3)r23c9 => r1c8<>3.

tlanglet

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

Posted: Thu Jul 08, 2010 8:23 pm Post subject:

Short xy-chain.........

Quote:

(8=3)r4c9-(3=2)r4c2-(2=4)r1c2-(4=3)r1c4-(3=8)r1c8; r2c9<>8

Or, a two stepper for those of us who are not (usually) into chains.......

Quote:

ANP(34=8)r2c49-(8=3)r1c8-r1c4=(3)r2c4; r2c1<>3
(8=3)r4c9-BUG+2[(3)r4c7=(8)r7c7]-r7c8=r1c8; r2c9<>8 [This is a BUG+2 with extensions from both BUG cells.]

Ted

[Edit to include two step solution.]

Mogulmeister

Joined: 03 May 2007
Posts: 1151

Posted: Thu Jul 08, 2010 9:27 pm Post subject:

Like 'em both.

Marty R.

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

Posted: Fri Jul 09, 2010 5:01 am Post subject:

X-Wing (8) 47 UR, r3c9=4 BUG+1

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