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Puzzle 10/09/14: C

dailysudoku.com Forum Index -> Puzzles by daj

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daj95376

Joined: 23 Aug 2008
Posts: 3854

Posted: Tue Sep 14, 2010 6:14 am Post subject: Puzzle 10/09/14: C

Code:

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

Play this puzzle online at the Daily Sudoku site

JC Van Hay

Joined: 13 Jun 2010
Posts: 494
Location: Charleroi, Belgium

Posted: Tue Sep 14, 2010 11:04 am Post subject:

Quote:

To avoid DP (17)R14C23 : => r5c2<>8
To avoid DP (36)R78C38 : => r7c8<>36=59
5-SIS AIC : 8C2 (83)R1C7 (35)R8C7 (59)R7C8 (98)R5C8 : (8)r4c2=(8)r5c8 : => r4c78,r5c1<>8

peterj

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

Posted: Tue Sep 14, 2010 4:12 pm Post subject:

Two steps - first one quite nice!

Quote:

w-wing(38) using SL in DP(17) ; (3=8)r1c7 - ADP(17)[(8)r1c2=r4c2] - (8=3)r4c8 ; r2c8<>3, r4c7<>3
xy-wing(38-5) r1c7 ; r2c7<>5, r7c8<>5

Marty R.

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

Posted: Wed Sep 15, 2010 3:23 pm Post subject:

Type 1 UR (36) Type 2 UR (17-8) W-Wing (38) XY-Wing (385)

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