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Puzzle 10/07/03: XY

dailysudoku.com Forum Index -> Puzzles by daj

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daj95376

Joined: 23 Aug 2008
Posts: 3854

Posted: Sat Jul 03, 2010 4:52 am Post subject: Puzzle 10/07/03: XY

Code:

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

Play this puzzle online at the Daily Sudoku site

Code:

after basics
+-----------------------------------------------------------------------+
| 1 8 479 | 6 3479 5 | 2479 237 279 |
| 4579 6 4579 | 2 13479 13479 | 8 37 579 |
| 4579 2 3 | 8 479 479 | 4579 1 6 |
|-----------------------+-----------------------+-----------------------|
| 38 4 6 | 1 5 28 | 27 9 237 |
| 38 59 59 | 7 6 28 | 1 4 23 |
| 2 7 1 | 34 349 349 | 6 5 8 |
|-----------------------+-----------------------+-----------------------|
| 6 3 8 | 45 1247 147 | 2579 27 2579 |
| 57 1 2 | 9 8 37 | 357 6 4 |
| 4579 59 4579 | 35 237 6 | 2357 8 1 |
+-----------------------------------------------------------------------+
# 84 eliminations remain

tlanglet

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

Posted: Sat Jul 03, 2010 1:04 pm Post subject:

Two stepper.............

Quote:

ADP (238) r45c169 forces r4c9=7
xy-wing 3-57 with vertex r8c6; r9c123<>5

Ted

peterj

Joined: 26 Mar 2010
Posts: 974
Location: London, UK

Posted: Sat Jul 03, 2010 3:23 pm Post subject:

A single-step wing made to work hard..

Quote:

xy-wing(37-5) r8c6; r9c123<>5
& transport (5)r8c1 - r3c1=r3c8 - r2c9=r7c9; r7c4<>5

[Edit] Ted, has kindly pointed out that I must have made a mistake! And indeed I have... I'm sure this was my only and last move but seems a w-wing(23) or Ted's dp is needed to complete this... Embarassed

Marty R.

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

Posted: Tue Jul 06, 2010 1:02 am Post subject:

Same DP and XY-Wing as Ted.

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